Tomek is available for hire
Hire TomekTomek Grzechowski
Verified Expert in Engineering
Software Developer
Kielce, Poland
Toptal member since July 14, 2021
Bio
Tomek sold his 1st software 30 years ago. It was a program written in Pascal with both text and graphical UI, enabling electrical engineers to double-check some calculations and drawings. The software was used for the next 15 years. For the last 25 years, Tomek has been an active full-stack programmer, constantly learning new markets and technologies. His experience spans consulting, programming, management, team leadership, and managing a small company as a co-owner and CTO.
Portfolio
Portola Holdings Pty Ltd
PHP, Angular, JavaScript, MySQL, Git, Linux, AngularJS...
Modern Enigma Society
PHP, MySQL, Symfony 2, Symfony 3, Symfony 4, Symfony 5, Symfony 6, Symfony 7...
Des Moines University - Main
PHP, PHP 5, PHP 7, PHP 8, Docker, Docker Compose, Git, GitHub, CakePHP...
Experience
- HTML - 20 years
- CSS - 20 years
- JavaScript - 20 years
- PHP - 20 years
- MySQL - 20 years
- Sass - 15 years
- Laravel - 8 years
- Vue 2 - 2 years
Work Experience
CTO/Fractional CTO
2026 - 2026
Portola Holdings Pty Ltd
- Built a decision-grade acquisition pack translating technical findings into executive-level risks, priorities, and a staged program (P0 Stabilization, P1 Efficiency, and P2 Decision Fork) with clear goals, dependencies, and exit criteria.
- Assessed production infrastructure reliability and operational risk (single-operator dependency, undocumented steps, and environment fragility), and defined a “no-regret” stabilization path focused on repeatability and independence.
- Documented evidence-based validation steps (slow query logs, app-level query timing, and controlled instance upgrade tests) to isolate database versus application-tier bottlenecks; outlined vertical scaling and longer-term horizontal scaling options.
- Quantified API and UI maintainability and refactor risk using static analysis, hotspot ranking, and tunable scoring. Built data-driven workbooks to map priorities and expose concentrated areas of technical risk.
- Produced an actionable workplan workbook with tasks, deliverables, blockers, and acceptance criteria across P0, P1, and P2 options (refactor vs framework migration vs replacement), enabling defensible estimation and sequencing.
- Created architecture documentation assets (UML diagrams) covering deployment infrastructure, component topology, replication patterns, CDN, UI, and API separation, and load-balancing options.
- Developed cost and rate benchmarking inputs (global engineering rate model) to support operating-cost planning and staffing scenarios post-takeover.
- Designed and implemented Orchestrator and db-forge to extract SaaS provisioning from a legacy monolith into auditable Laravel workflows. The project was paused after the client decided to discontinue the planned large-scale legacy refactor.
Technologies: PHP, Angular, JavaScript, MySQL, Git, Linux, AngularJS, Amazon Web Services (AWS), DevOps, SaaS, Amazon EC2, Amazon Route 53, Cloudflare, OVH, Bash, Code Review, Analysis, CTO, Apache2, Security, Planning, Reporting, Decision Support, Decision Intelligence, Risk, Roadmaps, Disaster Recovery (DR), Observability Tools, Architecture, Software QA, Software as a Service (SaaS), Static Analysis, Executive Support, Executive Reporting, Executive Summaries, Project Management, Code Auditing, Audits, IT Audits, Payments, Compliance, Claude Code, AI-assisted Development, Agentic Coding, Data Pipelines, Third-party APIs, Relational Databases, Microservices, Microservices Architecture, Agentic AI, AI Tools, Laravel, Web App Design, Third-party Integration, AI Copilots, Data Analysis, Testing, API Design, Web Application Design, Client Communication, DNS, Troubleshooting, Hands-on Implementation, High Code Quality, Infrastructure, Scaling, Microsoft Excel, Data Modeling, Proxies, Open Source, Technical Architecture, Platforms, Claude, Multi-tenant SaaS, Workflow Automation, Data Aggregation, PHP MVC, Legacy Software, IT Infrastructure, Technical Standards, System Design, Systems, Data Analytics, Application Security, Observability, API Architecture, API Documentation, Interactive UI, Prompt Engineering, Monitoring, Back-end Architecture, Scripting, Database Performance, Database Optimization, Concurrency, Shell Scripting, Database Architecture, PHPUnit, Twilio, Workflows, Webhooks, Single Sign-on (SSO), Data Security, AI Engineering, Cursor AI, Mergers & Acquisitions (M&A), System Integration, Machine Learning, Integrations, Workflow Automation & System Integration, Single-page Applications (SPAs), Email Integration, Cloud, Security Audits, Web Application Security
Software Developer
2024 - 2025
Modern Enigma Society
- Reviewed the current portal technology and, after evaluating the upgrade path from Symfony 3 to 7, decided to rebuild it from scratch on Symfony 7 due to numerous missing dependencies. The cherry on top was a new responsive (RWD) design.
- Set up advanced Docker and Docker Compose with auto-configuration and auto-installation for the following projects: cdb, mail, MES-portal, op, symfonyportal, and wiki2020.
- Rebuilt a broken prototype into two clean projects (React UI and Node.js API). Cleaned messy DB from 107 to 16 tables, fixed architecture, added Docker, TypeScript, validation, and modern UX. Delivered a stable, maintainable full-stack platform.
- Testimonial: "I would like to thank you for your dedication and exceptional work on this project. You have truly made working on this project easy and I would not hesitate to reach out to you again for any future projects." – Client.
Technologies: PHP, MySQL, Symfony 2, Symfony 3, Symfony 4, Symfony 5, Symfony 6, Symfony 7, Node.js, Express.js, HTTP, NPM, Sequelize, Knex.js, Axios, TypeScript, React, JSON Web Tokens (JWT), Yup, Tailwind CSS, Docker, Docker Compose, Zeffy, APIs, REST, Legacy Code, Code Refactoring, HTML Templates, Agile, Application State Management, Large Language Models (LLMs), AI-generated Code, RESTFul APIs, Analytics, Stripe API, Tailwind UI, TypeScript 3, Web Security, Integration, Project Management, Audits, IT Audits, Payments, Claude Code, Mobile Development, AI-assisted Development, Data Pipelines, Third-party APIs, Relational Databases, OAuth 2, Web App Design, Interactive Prototypes, AI Copilots, Testing, API Design, Web Application Design, Troubleshooting, Automation, Hands-on Implementation, High Code Quality, Microsoft Excel, Data Modeling, Proxies, Technical Architecture, Claude, Event-driven Architecture, Workflow Automation, Data Aggregation, CORS, Cross-site Request Forgery (CSRF), PHP MVC, IT Infrastructure, Technical Standards, Systems, Solution Design, Data Analytics, Application Security, API Architecture, Interactive UI, Prompt Engineering, Scripting, Database Performance, Database Optimization, Shell Scripting, Database Architecture, Workflows, Webhooks, Single Sign-on (SSO), Data Security, UI Design, CRUD, AI Engineering, React Redux, System Integration, Machine Learning, Integrations, Workflow Automation & System Integration, Single-page Applications (SPAs), Email Integration, Web Application Security
PHP Developer
2024 - 2024
Des Moines University - Main
- Reviewed the source code and functionalities of the CakePHP 3-based MVP acquired from another university by DMU. Identified security issues across different parts of the technological framework — including PHP, the CakePHP version, and the MVP code.
- Prepared a plan to publish the updated version of the system, incorporating all client-requested functionality changes, as well as necessary security and architectural fixes, by the agreed deadline.
- Prepared a multi-architecture Docker solution to host and test all required upgrade steps and branches simultaneously.
- Upgraded the system sequentially — from CakePHP 3 (latest) to CakePHP 4 (latest), and finally to CakePHP 5.
- Fixed all identified security issues and refactored the authentication and authorization components in line with best architectural practices.
- Implemented all client-requested changes and successfully published the updated system by the specified deadline.
- Received multiple commendations and professional references from client team members, later shared on LinkedIn.
Technologies: PHP, PHP 5, PHP 7, PHP 8, Docker, Docker Compose, Git, GitHub, CakePHP, CakePHP 3, CakePHP 4, CakePHP 5, Refactoring, Code Refactoring, Azure, OAuth, OAuth 2, MySQL, Apache, Linux, Servers, Security, Code Review, Source Code Review, Health, Healthcare, Legacy Code, Enterprise Resource Planning (ERP), HTML Templates, Server-side PDF Generation, Agile, RESTFul APIs, Analytics, Figma to HTML, Web Security, Integration, Project Management, Code Auditing, Audits, Compliance, IT Audits, Healthtech, Mobile Development, Data Pipelines, Third-party APIs, Relational Databases, Web App Design, Healthcare Software, Data Analysis, Testing, Web Application Design, Hands-on Implementation, High Code Quality, Microsoft Excel, Data Modeling, Technical Architecture, Platforms, Training, CORS, Cross-site Request Forgery (CSRF), PHP MVC, Technical Standards, Systems, Solution Design, Enterprise Architecture, Data Analytics, Application Security, Interactive UI, Prompt Engineering, Scripting, Database Performance, Database Optimization, Shell Scripting, Database Architecture, Workflows, Single Sign-on (SSO), Data Security, UI Design, System Integration, Integrations, Workflow Automation & System Integration, Email Integration, Security Audits, Web Application Security
Programmer | Software Engineer | Lead Engineer
2000 - 2023
Freelance
- Led 20+ key projects since 2000, managing teams of up to 5 developers. Primarily focused on startups, solutions, and online business processes. Delivered 5 SaaS systems, showcasing my software engineering and project management expertise.
- Delivered a streaming MVP in 2021 for artists to register, post events, and sell tickets for online-streamed artistic events in 2020.
- Designed, engineered, and delivered an educational MVP SaaS project using Laravel (back-end API), Vue (front-end app), and Node.js (game chat server).
- Created CMS engines, websites, eCommerce solutions, an MVC framework, an HR solution, and an online survey system on that framework. As a result, I was offered 50% ownership and co-managed the company, overseeing ten projects until 2014.
- Developed a technology for LunaJets to manage content, planes, routes, and private jet flights, including empty legs, in 2009. Updated the solution in 2014 for improved performance.
- Revamped the International Air Transport Association's MVP, improving performance and adding new features to Matchmaker, a KPI tracking software for innovation delivery from 2009 to 2011.
Technologies: HTML, PHP, JavaScript, Angular, React, SQL, MySQL, PostgreSQL, Laravel, Symfony, Refactoring, Software Engineering, Design Patterns, Bash Script, Perl, Node.js, Bootstrap, CSS, SCSS, NPM, Composer, Docker, CakePHP, Salesforce, Team Management, Software Development Management, Team Mentoring, Vue 2, Vue, Bootstrap 4, FlatFile, JSON, APIs, Microservices, REST, Google Analytics, Google API, Google APIs, Search Engine Optimization (SEO), Search Engines, jQuery, jQuery UI, SVG, Canvas, Service Frameworks, Google Maps API, Google Maps, GeoJSON, Google Maps API (GeoJSON), Agile Software Development, Electronic Data Interchange (EDI), REST APIs, JSON REST APIs, Front-end, Back-end, Full-stack, Code Review, Source Code Review, Task Analysis, IT Project Management, Lean Project Management, Agile Project Management, Technical Hiring, Interviewing, Software Architecture, HTML5, TypeScript, Google Cloud, Mentorship, Version Control Systems, Version Control, JavaScript 6, Google Apps Script, Google Sheets, User Interface (UI), SaaS, TinyMCE, Vanilla JS, Linux, User Experience (UX), CSS3, Object-oriented Programming (OOP), Apache, NGINX, API Integration, Front-end Development, Responsive Web Design (RWD), Magento, DevOps, Financial Data, Data Visualization, Startups, Web Applications, Web Development, Roadmaps, CTO, Architecture, Documentation, Payment APIs, eCommerce, Application Engineering, PHP 8, PHP 4, PHP 5, PHP 7, Responsive UI, Responsive Layout, Responsive Web Apps, CRM APIs, Zoho CRM, Zoho API, Magento API, Magento 2, Excel VBA, Banking & Finance, Business Models, Business Modeling, Financing, Financial Modeling, GraphQL, Cloud Platforms, Kubernetes, DOM, Java, MariaDB, Cryptography, Unit Testing, Leadership, Software Design, Software Design Patterns, System Architecture, Requirements Analysis, Booking Systems, Travel, Nuxt.js, NestJS, Laravel Forge, Vuetify, Mapbox, Mapbox SDK, Mapbox API, Mapping, Charts, Responsiveness, CRM Systems, Lead Generation, Consulting, Socket.IO, Bitbucket, Solution Architecture, Technical Leadership, Amazon Web Services (AWS), Docker Compose, PHPUnit, Elasticsearch, Sylius, Zoho, Google Tag Manager, Google Tag Manager API, IndexedDB, Sockets, WebSockets, Chrome Extensions, Databases, Reverse Engineering, FFmpeg, IT Security, Yii, Server Management, Team Leadership, ECMAScript (ES6), Vue 3, Mobile, Mobile App Development, Flight Management, Flightplan, Responsive Design, OpenAI, Back-end Development, Full-stack Development, Software as a Service (SaaS), Next.js, Symfony 2, Design, UI Development, Web UI, NoSQL, Tailwind CSS, MVC Frameworks, Dependency Injection, Deptrac, PHPStan, phpDocumentor, Static Analysis, Social Media APIs, Database Design, Data Engineering, API/Services Architecture, Software Development, Auditing, Artificial Intelligence (AI), Zapier, Payment Gateways, Shopify, Bug Fixes, Performance Optimization, Cloud Architecture, Scalability, Software System Architecture Development, Engineering, Content Management Systems (CMS), Webflow, Google Search Console, Communication, Amazon S3 (AWS S3), Role-based Access Control (RBAC), Dashboards, Multitenancy, Stripe, Jira, Cloud, Continuous Integration (CI), HTML DOM, SurveyJS, Vite, Vue Test Utils, XML, GitHub Actions, Chart.js, JSON Web Tokens (JWT), React Router, React Query, React Hook Form, Redux, jsPDF, Cross-platform, Minimum Viable Product (MVP), B2B, Multi-tenant Architecture, Data Scraping, Legacy Code, Code Refactoring, Enterprise Resource Planning (ERP), Server-side PDF Generation, Agile, Business to Business (B2B), Application State Management, Headless CMS, HIPAA Compliance, HIPAA Electronic Data Interchange (EDI), RESTFul APIs, Analytics, Strapi, Stripe API, Fractional CTO, General Data Protection Regulation (GDPR), Customer Relationship Management (CRM), Figma to HTML, Cloudflare, Web Security, Laravel 5, OpenAPI, Event-driven Design (EDD), Integration, Message Queues, RabbitMQ, Shopify API, Project Management, Code Auditing, Audits, Compliance, IT Audits, Payments, Security, SendGrid, Education Technology (Edtech), Mobile Development, Data Pipelines, Third-party APIs, Relational Databases, Microservices Architecture, CodeIgniter, Trello, Web App Design, Mobile Apps, React Native, HIPAA, Third-party Integration, Interactive Prototypes, Optical Character Recognition (OCR), Algorithms, CRM, Data Analysis, Testing, HubSpot, API Design, Web Application Design, Google Cloud Platform (GCP), Geolocation, Client Communication, DNS, Troubleshooting, Automation, Hands-on Implementation, High Code Quality, Infrastructure, Scaling, Ruby, Microsoft Excel, Data Modeling, Proxies, Technical Architecture, Platforms, Training, Multi-tenant SaaS, Event-driven Architecture, Workflow Automation, Real Estate, CORS, Cross-site Request Forgery (CSRF), PHP MVC, Legacy Software, IT Infrastructure, Technical Standards, Vercel, Systems, Solution Design, Retail Management, SKUs, Data Analytics, Application Security, API Architecture, Interactive UI, Prompt Engineering, Monitoring, Asynchronous Programming, Back-end Architecture, Scripting, Database Performance, Database Optimization, Concurrency, Shell Scripting, Database Architecture, White Labeling, CRM Implementation, Workflows, Webhooks, SAML, Single Sign-on (SSO), Data Security, UI Design, Web Design, Maps, Highcharts, AI-generated Video, Three.js, WebRTC, Mergers & Acquisitions (M&A), System Integration, Integrations, Workflow Automation & System Integration, Single-page Applications (SPAs), Blade Templates, Figma, Email Integration, Streaming, CMS, Web Application Security
Full-stack Developer
2022 - 2022
Next Jump
- Migrated a client's Zend Framework-based service system from PHP5 to PHP7 using custom testing and code review solutions to ensure seamless functionality.
- Modified various parts of the client's system, such as Zend Framework-based services, Go-based tools, and a multi-component, multi-technology eCommerce system, as per client requests to enhance functionality.
- Fixed reported bugs in an internal company toolkit Zend Framework-based project.
Technologies: PHP, PHP 5, PHP 7, HTML, HTML5, CSS, JavaScript, Zend Framework, Go, Docker, Docker Compose, Git, GitHub, Microsoft SQL Server, Apache, API Integration, Responsive Web Design (RWD), Front-end Development, DevOps, Web Applications, Web Development, Responsive UI, Responsive Web Apps, Responsive Layout, Cryptography, Unit Testing, Full-stack, Responsiveness, APIs, SCSS, PHPUnit, Databases, ECMAScript (ES6), Responsive Design, Back-end Development, Full-stack Development, Software as a Service (SaaS), MVC Frameworks, Dependency Injection, Static Analysis, API/Services Architecture, Software Development, Bug Fixes, Engineering, Communication, Role-based Access Control (RBAC), Multitenancy, HTML DOM, B2B, Legacy Code, Enterprise Resource Planning (ERP), HTML Templates, Business to Business (B2B), RESTFul APIs, Analytics, Web Security, Event-driven Design (EDD), Redis, Data Pipelines, Third-party APIs, Relational Databases, Web App Design, Hands-on Implementation, High Code Quality, Technical Architecture, SQL Server, Multi-tenant SaaS, Workflow Automation, PHP MVC, Legacy Software, Systems, Enterprise Architecture, Interactive UI, Shell Scripting, Workflows, System Integration, Integrations, Workflow Automation & System Integration, QR Codes
Harmonizer
2018 - 2018
Adshares
- Implemented Bash Docker scripts enabling team members to set up a fast local dev environment without any knowledge of Docker.
- Initiated the conversion of ad server technology from Symfony to Laravel.
- Initiated a clean-up of ad server UI technology based on Angular.
- Acquired over 200 business contacts when representing the company meetings of adtech industry members, including Google global directors' contacts.
Technologies: PHP, JavaScript, HTML5, Symfony, Angular, Laravel, Blockchain, Docker, Bash, Business to Business (B2B), TypeScript, Fintech, API Integration, Front-end Development, Responsive Web Design (RWD), Cryptocurrency, DevOps, Startups, Web Applications, Web Development, Roadmaps, Responsive UI, Responsive Layout, Responsive Web Apps, Cryptography, Unit Testing, Leadership, Full-stack, Requirements Analysis, Responsiveness, APIs, SCSS, CI/CD Pipelines, Solution Architecture, Technical Leadership, Cloud Infrastructure, PHP 7, PHPUnit, Chrome Extensions, Databases, Team Leadership, ECMAScript (ES6), Mobile, Responsive Design, Back-end Development, Full-stack Development, Software as a Service (SaaS), Symfony 2, Design, MVC Frameworks, Dependency Injection, Static Analysis, API/Services Architecture, Software Development, Bug Fixes, Cloud Architecture, Scalability, Software System Architecture Development, Engineering, Communication, Multitenancy, Product Owner, Continuous Integration (CI), HTML DOM, GitHub Actions, Minimum Viable Product (MVP), B2B, Agile, Application State Management, RESTFul APIs, Analytics, General Data Protection Regulation (GDPR), AngularJS, Figma to HTML, Web Security, Integration, Project Management, Audits, IT Audits, Payments, Mobile Development, Data Pipelines, Third-party APIs, Relational Databases, Microservices, Microservices Architecture, Web App Design, Interactive Prototypes, Algorithms, Data Analysis, Testing, API Design, Client Communication, Hands-on Implementation, High Code Quality, Open Source, Technical Architecture, Platforms, PHP MVC, Management, Technical Standards, Product Management, Systems, Solution Design, API Architecture, Interactive UI, Prompt Engineering, Back-end Architecture, Scripting, Shell Scripting, Database Architecture, Workflows, Team Leadership & Supervision, System Integration, Integrations, Workflow Automation & System Integration, Single-page Applications (SPAs)
Chief Technology Officer | Co-owner
2009 - 2015
SurveyLab
- Delivered an online survey engine in 2007, after which a prior client of mine offered me a CTO position and 50% shares of the newly founded company. I accepted it and became a partner in the project in 2009.
- Developed a customized application framework allowing scalability of the final product to consist of the installation of 300+ applications following their own design pattern configured as the online survey system.
- Designed the expertise-based sales and customization delivery process for clients buying SaaS enterprise packages, funding software growth on incoming sales based on the most important clients' needs.
- Sold customizations to clients such as LinkedIn and Dropbox.
- Grew the product into the second online survey software in Poland, yet funded only on income.
Technologies: PHP, JavaScript, HTML, SQL, Sales Strategy, Strategy, IT Strategy, User Experience (UX), Team Management, Software Development Management, Team Mentoring, Linux, Server Administration, Source Code Review, Code Review, Task Analysis, Task Flows, IT Project Management, Lean Project Management, Project Analysis, Agile Project Management, Web Project Management, Digital Project Management, Front-end, Back-end, Full-stack, Technical Hiring, Interviewing, Software Architecture, HTML5, Mentorship, Version Control, Version Control Systems, SaaS, TinyMCE, LAMP, Object-oriented Programming (OOP), Apache, API Integration, Front-end Development, Responsive Web Design (RWD), DevOps, Financial Data, Data Visualization, Startups, Web Applications, Web Development, CTO, Roadmaps, Architecture, Documentation, Payment APIs, Application Engineering, PHP 4, PHP 5, Responsive UI, Responsive Layout, Responsive Web Apps, Business Strategy, Financials, Financial Modeling, Business Models, Business Modeling, App Support, Software Troubleshooting, Logging, Zendesk, Zendesk API, Leadership, Software Design, Software Design Patterns, Education, Training, System Architecture, Requirements Analysis, Charts, Responsiveness, Account Management, Consulting, Lead Generation, CRM Systems, CRM APIs, APIs, Solution Architecture, Technical Leadership, Cloud Infrastructure, Zoho, IndexedDB, Databases, Reverse Engineering, IT Security, Server Management, Team Leadership, Mobile, Mobile App Development, Responsive Design, Back-end Development, Full-stack Development, Software as a Service (SaaS), Design, UI Development, Web UI, MVC Frameworks, Dependency Injection, Static Analysis, Social Media APIs, Database Design, Data Engineering, API/Services Architecture, Software Development, Auditing, Payment Gateways, Bug Fixes, Performance Optimization, Cloud Architecture, Scalability, Software System Architecture Development, Engineering, Content Management Systems (CMS), Google Search Console, Communication, Role-based Access Control (RBAC), Dashboards, Multitenancy, Product Owner, HTML DOM, XML, Cross-platform, Minimum Viable Product (MVP), B2B, Multi-tenant Architecture, Data Scraping, Financial Calculations, Code Refactoring, Enterprise Resource Planning (ERP), Finance, HTML Templates, Server-side PDF Generation, Accounting, Agile, Business to Business (B2B), RESTFul APIs, Analytics, General Data Protection Regulation (GDPR), Customer Relationship Management (CRM), Web Security, Event-driven Design (EDD), Integration, Project Management, Code Auditing, Audits, IT Audits, Private Equity, Payments, Security, Mobile Development, Data Pipelines, Third-party APIs, Relational Databases, Web App Design, Third-party Integration, Interactive Prototypes, Optical Character Recognition (OCR), Algorithms, Data Analysis, Testing, API Design, Web Application Design, Geolocation, Client Communication, Customer Support, DNS, Troubleshooting, Automation, Screeners, Hands-on Implementation, High Code Quality, Infrastructure, Scaling, Microsoft Excel, Data Modeling, Proxies, Technical Architecture, Platforms, Multi-tenant SaaS, Workflow Automation, Data Aggregation, Cross-site Request Forgery (CSRF), PHP MVC, IT Infrastructure, Management, Technical Standards, eCommerce CMS, System Design, Product Management, Systems, Solution Design, Enterprise Architecture, Data Analytics, Observability, API Architecture, API Documentation, Interactive UI, Prompt Engineering, Monitoring, Asynchronous Programming, Back-end Architecture, Scripting, Database Performance, Database Optimization, Concurrency, Shell Scripting, Database Architecture, Data Warehousing, White Labeling, CRM Implementation, Workflows, Webhooks, Data Security, UI Design, Web Design, CRUD, Team Leadership & Supervision, Mergers & Acquisitions (M&A), System Integration, Integrations, Workflow Automation & System Integration, Email Integration, CMS, Security Audits, Web Application Security
Lead Engineer
2012 - 2014
Hill+Knowlton Strategies
- Hired to build a team of developers to form a company digital delivery hub following the idea of the global digital director. The project was slowly terminated as being against the policy after the same global director left the corporation.
- Learned a lot about policy in global corporations and delivered a great enterprise-class content management system for 14 of the national offices of the corporation: the system was fully i18n, RWD, and SEO-focused, and provided a media editor.
- Delivered several different digital marketing projects, Facebook applications, and corporate websites for several company clients together with my team.
- Considered the go-to person in our Polish office and many other offices worldwide regarding the estimation of incoming digital business leads.
Technologies: PHP, JavaScript, HTML, CSS, X (formerly Twitter), Facebook, Software Development Management, Team Management, Sales, Sales Pitches, SEO Audits, Team Mentoring, Linux, Server Administration, HTML5, Mentorship, User Interface (UI), LAMP, User Experience (UX), Object-oriented Programming (OOP), Apache, Videos, Video Streaming, X (formerly Twitter) API, API Integration, Responsive Web Design (RWD), Front-end Development, DevOps, Web Applications, Web Development, CTO, Roadmaps, Architecture, Documentation, Payment APIs, Application Engineering, MariaDB, Leadership, Software Design, Software Design Patterns, Full-stack, System Architecture, Software Architecture, Requirements Analysis, Charts, Responsiveness, Account Management, Consulting, Lead Generation, Technical Leadership, Solution Architecture, PHP 7, Google Tag Manager, Google Tag Manager API, Databases, FFmpeg, IT Security, Server Management, Team Leadership, Responsive Design, Back-end Development, Full-stack Development, Software as a Service (SaaS), Design, UI Development, Web UI, MVC Frameworks, Dependency Injection, Static Analysis, Social Media APIs, Database Design, Data Engineering, API/Services Architecture, Software Development, Auditing, Payment Gateways, Bug Fixes, Performance Optimization, Scalability, Software System Architecture Development, Engineering, Content Management Systems (CMS), Google Search Console, Communication, Role-based Access Control (RBAC), Dashboards, Multitenancy, Product Owner, HTML DOM, XML, Chart.js, Cross-platform, Minimum Viable Product (MVP), B2B, Multi-tenant Architecture, Code Refactoring, Enterprise Resource Planning (ERP), Finance, HTML Templates, Agile, Business to Business (B2B), Headless CMS, RESTFul APIs, Analytics, General Data Protection Regulation (GDPR), Customer Relationship Management (CRM), Web Security, Integration, Project Management, Search Engine Optimization (SEO), Code Auditing, Audits, Payments, Mobile Development, Data Pipelines, Third-party APIs, Relational Databases, Web App Design, Interactive Prototypes, Algorithms, Data Analysis, Testing, Web Application Design, Geolocation, Client Communication, Customer Support, DNS, Troubleshooting, Screeners, Interviewing, Hands-on Implementation, High Code Quality, Microsoft Excel, Data Modeling, Proxies, Technical Architecture, Training, Data Aggregation, Cross-site Request Forgery (CSRF), PHP MVC, Management, Technical Standards, eCommerce CMS, System Design, Product Management, Systems, Solution Design, Enterprise Architecture, Retail Management, Data Analytics, Application Security, API Architecture, API Documentation, Interactive UI, Prompt Engineering, Monitoring, Asynchronous Programming, Back-end Architecture, Scripting, Database Performance, Database Optimization, Concurrency, Shell Scripting, Database Architecture, White Labeling, CRM Implementation, Workflows, Webhooks, Data Security, UI Design, Web Design, Team Leadership & Supervision, System Integration, Integrations, Workflow Automation & System Integration, Email Integration, Streaming, CMS, Web Application Security
PHP Developer | Lead PHP Developer
2007 - 2008
o2
- Refactored, optimized, and delivered new features to some company/internal software, such as VoIP online administration panel, CRM, and VoIP hardware remote manager.
- Won a very gratifying bet with the company owner and delivered a new MVC framework, ORM framework, and CRM MVP in three days.
- Considered the go-to person in case of issues related to SQL and PHP.
Technologies: PHP, HTML, JavaScript, CSS, Patterns, Linux, Team Mentoring, Design Patterns, Frameworks, APIs, Customer Relationship Management (CRM), Full-stack, Back-end, Agile Project Management, Front-end, Task Analysis, Task Flows, Software Design Patterns, Software Design, Software Deployment, Mentorship, Version Control Systems, Version Control, LAMP, Object-oriented Programming (OOP), Apache, Web Applications, Web Development, Application Engineering, Leadership, Requirements Analysis, Solution Architecture, Technical Leadership, Databases, Server Management, Back-end Development, Full-stack Development, Software as a Service (SaaS), Design, UI Development, Web UI, MVC Frameworks, Static Analysis, Database Design, Data Engineering, API/Services Architecture, Software Development, Payment Gateways, Bug Fixes, Performance Optimization, Engineering, Content Management Systems (CMS), Google Search Console, Role-based Access Control (RBAC), Dashboards, Multitenancy, HTML DOM, XML, Minimum Viable Product (MVP), Legacy Code, Code Refactoring, Enterprise Resource Planning (ERP), HTML Templates, Analytics, Web Security, Integration, Real-time Systems, Code Auditing, Data Pipelines, Third-party APIs, Relational Databases, Web App Design, Algorithms, CRM, Data Analysis, Web Application Design, Hands-on Implementation, High Code Quality, Data Modeling, Technical Architecture, PHP MVC, Legacy Software, Technical Standards, eCommerce CMS, System Design, Systems, Solution Design, Enterprise Architecture, Data Analytics, Interactive UI, Prompt Engineering, Asynchronous Programming, Back-end Architecture, Scripting, Database Performance, Database Optimization, Concurrency, Shell Scripting, Database Architecture, CRM Implementation, Workflows, Webhooks, Data Security, UI Design, Web Design, CRUD, System Integration, Email Integration, CMS, Web Application Security
Programmer
1996 - 2000
Self-employed
- Sold one program based on the given requirements, helping electrical engineers to verify calculations in their energy network projects.
- Tried to publish educational software with my hacker friends, but as we went to different universities, the project went cold.
- Made a few websites, which are all outdated and down now.
- Worked on a digital paper about programming with an extremely limited number of viewers in our school.
Technologies: HTML, Assembler, C, C++, Pascal, Turbo Pascal, JavaScript, User Interface (UI), Software Design, Software Design Patterns, Full-stack, Requirements Analysis, Databases, Reverse Engineering, Back-end Development, Full-stack Development, Design, UI Development, MVC Frameworks, Static Analysis, Database Design, Data Engineering, Software Development, Bug Fixes, Engineering, Content Management Systems (CMS), Multitenancy, Analytics, Web Security, Algorithms, Hands-on Implementation, High Code Quality, Data Modeling, Data Aggregation, PHP MVC, eCommerce CMS, System Design, Data Analytics, Interactive UI, Prompt Engineering, Scripting, Shell Scripting, UI Design, Web Design, CRUD
Project History
SaaS | Educational Platform for Polish Law Students
https://testy.iusvitae.plBased on given client requirements, I designed and fully implemented an application with three types of roles—admin, editor, and user—allowing the client to enter Polish law acts and examination tests and define packages to be sold to users. Students can buy packages, study law, and test their knowledge. I implemented a number of solutions to help users repeat learning materials, review their knowledge, and help them effectively prepare for exams.
I did 100% of the development of the app's first version and later delegated it to another team.
I did 100% of the development of the app's first version and later delegated it to another team.
SaaS | Streaming Platform for Polish Actors
I designed and developed a single-page application (SPA), which included implementing three different roles: admin, artist, and user. Artists can apply for an account, register for the app, plan online events, and earn money from tickets. Admins can review artists' applications and accept their profiles, support all types of users by switching into users' accounts, and review billing and special user requests. Users can review content (events, artists), buy tickets, view events (online streams), and also request special and individual streams from artists (like birthday songs but also many other special events).
I did 100% of the development of the app.
I did 100% of the development of the app.
SaaS | Human Resources Platform
Based on the given requirements, I designed, developed, and delivered an HR platform implementing different roles for portal administration, content editing, company portfolio, user CV editing, and publishing.
Building CRM for o2 VoIP
While working for the o2.pl company, I bet with the company owner that I could deliver a simple CRM to cover marketing campaigns in three days without using any ready-to-use CRM software.
I won this bet and delivered a new MVC framework with code autogeneration, new ORM libraries, and a simple CRM system.
I won this bet and delivered a new MVC framework with code autogeneration, new ORM libraries, and a simple CRM system.
Maintenance and Changes of Lead Generation and CRM Integration
https://lunajets.comDuring the delivery of the new Lunajets.com website, I was in charge of delivering and leading the team and was also personally responsible for maintaining and changing their Salesforce integration.
Microservice Base in Laravel
https://github.com/yodahack/laravel-microbase-jobs-tasks-with-stepsI built a reusable Laravel microservice foundation with role-protected APIs, database-defined task types, durable task history, and queue-driven step execution. I also added feature tests, OpenAPI documentation, static analysis, CI, and quality gates.
Founder
Founder of Omega Way, an initiative developing new models for globally distributed and decentralized organizations. The work combines organizational architecture, management methodologies, decentralized governance, blockchain, fintech, digital identity, security, accountability, treasury and investment mechanisms, and new approaches to financial infrastructure. Related projects include Druid for trusted digital identity, GrooWee for governance and collective decision-making, and concepts for decentralized investment and capital allocation.
My primary role is vision and strategy: defining the overall system and its principles, building the founding team, developing partnerships, preparing the seed stage, and raising capital. I also shape the high-level organizational, governance, financial, and technology architecture, drawing on long-term work on decentralized monetary systems, including an inflation-resistant blockchain-based banking concept I have been developing since 2006.
My primary role is vision and strategy: defining the overall system and its principles, building the founding team, developing partnerships, preparing the seed stage, and raising capital. I also shape the high-level organizational, governance, financial, and technology architecture, drawing on long-term work on decentralized monetary systems, including an inflation-resistant blockchain-based banking concept I have been developing since 2006.
Certifications
FEBRUARY 2021 - PRESENT
JavaScript (Basic)
hackerrank.com
DECEMBER 2020 - PRESENT
Python (Basic)
hackerrank.com
DECEMBER 2020 - PRESENT
Problem Solving (Basic)
hackerrank.com
Skills
Libraries/APIs
Vue 2, jQuery, Node.js, React, Vue, REST APIs, Google Tag Manager API, jQuery UI, Vuex, Mapbox API, Sockets, Vue 3, Flightplan, Chart.js, React Router, React Query, React Hook Form, jsPDF, Highcharts, Google API, Google APIs, Google Maps API, Google Maps, Google Maps API (GeoJSON), X (formerly Twitter) API, Zoho API, Zendesk API, Socket.IO, FFmpeg, Social Media APIs, Stripe, SurveyJS, Yup, Stripe API, OpenAPI, Shopify API, Three.js, WebRTC, React Redux
Tools
Google Analytics, Logging, Figma, NGINX, Git, Docker Compose, GitHub, Google Sheets, Apache, Zapier, Figma to HTML, Claude Code, Trello, Microsoft Excel, Composer, Turbo Pascal, NPM, Canvas, Bitbucket, PHPStan, phpDocumentor, Jira, Vue Test Utils, Sequelize, Knex.js, RabbitMQ, Observability Tools, SendGrid, Claude
Languages
PHP, JavaScript, HTML, CSS, SQL, Sass, HTML5, TypeScript, CSS3, PHP 7, PHP 4, Python, Bash Script, SCSS, Google Apps Script, PHP 8, GraphQL, ECMAScript (ES6), TypeScript 3, Assembler, C, C++, Pascal, Perl, JavaScript 6, PHP 5, Go, Bash, Excel VBA, Java, XML, Ruby, SAML
Frameworks
Laravel, Symfony, Bootstrap, Vuetify, Vanilla JS, Next.js, Tailwind CSS, Redux, PHP MVC, Angular, Material UI, CakePHP, Nuxt.js, PHPUnit, Symfony 2, JSON Web Tokens (JWT), OAuth 2, Express.js, Laravel 5, CodeIgniter, Laravel 8, Zend Framework, NestJS, Sylius, Yii, CakePHP 3, CakePHP 4, Symfony 3, Symfony 4, Symfony 5, Symfony 6, AngularJS, React Native
Paradigms
Refactoring, Microservices, REST, Object-oriented Programming (OOP), Responsive Web Design (RWD), Responsive Layout, Requirements Analysis, Role-based Access Control (RBAC), HTML DOM, Code Refactoring, HIPAA Compliance, Web App Design, Back-end Architecture, Design Patterns, Search Engine Optimization (SEO), DevOps, Database Design, API/Services Architecture, Cross-platform, B2B, Agile, Microservices Architecture, Testing, Automation, Event-driven Architecture, API Architecture, Asynchronous Programming, UI Design, CRUD, Agile Software Development, Agile Project Management, Unit Testing, Object-relational Mapping (ORM), Dependency Injection, Continuous Integration (CI), Event-driven Design (EDD), Real-time Systems, Mobile Development, Management
Platforms
Linux, Docker, Software Design Patterns, LAMP, Mapbox, Zoho CRM, Zendesk, Amazon Web Services (AWS), Mobile, Webflow, Salesforce, X (formerly Twitter), Blockchain, Magento, Magento API, Magento 2, Kubernetes, Shopify, Azure, Amazon EC2, Apache2, HubSpot, Google Cloud Platform (GCP), Vercel, Twilio
Storage
MySQL, JSON, MariaDB, Databases, Relational Databases, PostgreSQL, FlatFile, Google Cloud, IndexedDB, Data Pipelines, Database Performance, Database Architecture, Microsoft SQL Server, Elasticsearch, NoSQL, Amazon S3 (AWS S3), Redis, OVH
Industry Expertise
Project Management, Web Design, Banking & Finance, Healthcare, Accounting
Other
Software Engineering, Team Mentoring, Frameworks, Bootstrap 4, APIs, JSON REST APIs, Front-end, Back-end, Full-stack, Code Review, Source Code Review, Task Analysis, Software Design, Software Deployment, Interviewing, Software Architecture, Mentorship, User Interface (UI), SaaS, User Experience (UX), Business to Business (B2B), API Integration, Front-end Development, Startups, Web Applications, Web Development, CTO, Roadmaps, Architecture, Documentation, Payment APIs, eCommerce, Application Engineering, Responsive UI, Responsive Web Apps, Financing, Financial Modeling, Business Strategy, Financials, App Support, Software Troubleshooting, Leadership, System Architecture, Solution Architecture, Technical Leadership, Google Tag Manager, Reverse Engineering, IT Security, Responsive Design, Back-end Development, Full-stack Development, Software as a Service (SaaS), Design, UI Development, Web UI, MVC Frameworks, Software Development, Artificial Intelligence (AI), Payment Gateways, Bug Fixes, Performance Optimization, Engineering, Content Management Systems (CMS), Communication, Minimum Viable Product (MVP), Multi-tenant Architecture, Legacy Code, HTML Templates, Application State Management, Headless CMS, RESTFul APIs, Analytics, Fractional CTO, Code Auditing, Audits, IT Audits, Third-party APIs, Web Application Design, Client Communication, Customer Support, Hands-on Implementation, High Code Quality, Technical Architecture, Multi-tenant SaaS, Data Aggregation, Legacy Software, eCommerce CMS, System Design, Systems, Solution Design, Retail Management, Scripting, Webhooks, Team Leadership & Supervision, AI Engineering, Integrations, Workflow Automation & System Integration, CMS, Team Management, Software Development Management, Patterns, SEO Audits, Server Administration, Search Engines, Customer Relationship Management (CRM), IT Project Management, Lean Project Management, Project Analysis, Web Project Management, Digital Project Management, Version Control Systems, Version Control, TinyMCE, Fintech, Video Streaming, Data Visualization, Learning Management Systems (LMS), CRM APIs, Cloud Platforms, DOM, Training, Booking Systems, Travel, Mapbox SDK, Mapping, Charts, CI/CD Pipelines, WebSockets, Chrome Extensions, Server Management, Team Leadership, Mobile App Development, Flight Management, Data Engineering, Auditing, Cloud Architecture, Scalability, Software System Architecture Development, Google Search Console, Dashboards, Multitenancy, Product Owner, Cloud, Security, Health, Financial Calculations, Enterprise Resource Planning (ERP), Finance, Server-side PDF Generation, Large Language Models (LLMs), AI-generated Code, Strapi, General Data Protection Regulation (GDPR), Tailwind UI, Web Security, Integration, Compliance, Private Equity, Payments, Healthtech, Education Technology (Edtech), AI-assisted Development, Agentic Coding, Agentic AI, AI Tools, Mobile Apps, Third-party Integration, Interactive Prototypes, Healthcare Software, Optical Character Recognition (OCR), Algorithms, CRM, Data Analysis, API Design, Geolocation, Troubleshooting, Screeners, Infrastructure, Scaling, Data Modeling, Proxies, Platforms, SQL Server, Workflow Automation, Real Estate, Technical Standards, Product Management, Enterprise Architecture, Data Analytics, Application Security, API Documentation, Interactive UI, Prompt Engineering, Monitoring, Database Optimization, Concurrency, Shell Scripting, Data Warehousing, White Labeling, CRM Implementation, Workflows, Single Sign-on (SSO), Data Security, Maps, Mergers & Acquisitions (M&A), System Integration, Machine Learning, Single-page Applications (SPAs), Blade Templates, Email Integration, QR Codes, Security Audits, Web Application Security, Sales Strategy, Strategy, IT Strategy, Facebook, Sales, Sales Pitches, SVG, Service Frameworks, GeoJSON, Electronic Data Interchange (EDI), Task Flows, Technical Hiring, Complex Problem Solving, Videos, Cryptocurrency, Financial Data, Business Models, Business Modeling, Real-time Streaming, Cryptography, Education, Laravel Forge, Responsiveness, Account Management, CRM Systems, Lead Generation, Consulting, Cloud Infrastructure, Zoho, OpenAI, Deptrac, Static Analysis, Vite, GitHub Actions, Data Scraping, CakePHP 5, OAuth, Servers, Symfony 7, HTTP, Axios, Zeffy, HIPAA Electronic Data Interchange (EDI), Cloudflare, Message Queues, Amazon Route 53, Analysis, Planning, Reporting, Decision Support, Decision Intelligence, Risk, Disaster Recovery (DR), Software QA, Executive Support, Executive Reporting, Executive Summaries, HIPAA, AI Copilots, DNS, Open Source, CORS, Cross-site Request Forgery (CSRF), IT Infrastructure, SKUs, Observability, CEO, Remote Team Leadership, Cross-functional Team Leadership, Fintech Design, Coaching, Team Coaching, AI-generated Video, Cursor AI, AI Integration, Agentic Workflow Design, Streaming
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