Andrej Gajdos, Developer in Prague, Czech Republic
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Andrej Gajdos

Bio

Andrej is a full-stack developer with a focus on the PERN and MERN stacks, with 10+ years of experience delivering software. As a fractional CTO and tech lead, he has managed several teams and delivered software to clients worldwide across many industries, including healthcare, finance, and eCommerce. Thus far, Andrej has delivered over 20 projects for startups, digital agencies, and Fortune 500 companies, including Apple and Binance.

Portfolio

Self-employed
JavaScript, React, Node.js, MongoDB, PostgreSQL, MySQL, Websites, Development...
Burro
Amazon Web Services (AWS), Node.js, React, Leaflet
GoSchoolBox
Node.js, Heroku, MongoDB, React, Server-side Rendering (SSR), Optimization...

Experience

  • Full-stack Development - 8 years
  • React - 8 years
  • Software Architecture - 8 years
  • Node.js - 7 years
  • MERN Stack - 6 years
  • API Integration - 6 years
  • PostgreSQL - 3 years
  • Amazon Web Services (AWS) - 3 years

Preferred Environment

OS X, Visual Studio Code (VS Code)

The most amazing...

...work I've done was transforming an educational platform into a scalable SaaS solution supporting 1 million users through architectural improvements.

Work Experience

Fractional CTO, Software Architect, Senior Full-stack Developer

2017 - PRESENT
Self-employed
  • Modernized and scaled existing platforms to support millions of users.
  • Led complex refactoring initiatives to improve reliability, maintainability, and scalability.
  • Optimized application performance, infrastructure, and critical user journeys.
  • Implemented observability, monitoring, and diagnostics for mission-critical systems.
  • Mentored engineers on architecture, software design, and engineering best practices.
  • Defined MVP scope and technical strategy to accelerate time-to-market.
  • Designed scalable software architectures that support rapid product evolution.
  • Established engineering processes, development workflows, and delivery practices.
  • Led engineering execution, coordinated releases, and mentored development teams.
  • Partnered closely with founders to translate business goals into technical roadmaps.
Technologies: JavaScript, React, Node.js, MongoDB, PostgreSQL, MySQL, Websites, Development, Front-end, APIs, CTO, Architecture, CSS, HTML, CSS3, HTML5, Next.js, Express.js, Tailwind CSS, D3.js, MobX, Responsive UI, UI Development, Single-page Applications (SPAs), Web Development, Full-stack Development, Front-end Architecture, Front-end Development, Data Visualization, Storybook, Amazon Web Services (AWS), CircleCI, Contentful, Amazon EC2, Heroku, Technical Leadership, Solution Architecture, Full-stack, Minimum Viable Product (MVP), API Design, TypeScript, REST APIs, User Interface (UI), Figma, Software Engineering, Agile, SQL, Web Applications, Software Architecture, Interactive UI, Git, Responsive Design, GraphQL, Unit Testing, Dashboards, Databases, API Integration, User Experience (UX), MERN Stack, Leadership, Startups, Crypto, Vibe Coding, Claude, Claude Code, Healthcare

Senior Full-stack Engineer

2023 - 2024
Burro
  • Designed and implemented the application architecture from front-end to back-end integration. Integrated seamlessly with existing back-end APIs and robotics infrastructure.
  • Built an intuitive GIS-style interface for route creation and editing.
  • Developed a scalable route management system with hierarchical data organization.
  • Delivered a user-friendly tool that simplified complex robotics workflows for non-technical customers.
Technologies: Amazon Web Services (AWS), Node.js, React, Leaflet

Software Architect

2022 - 2023
GoSchoolBox
  • Optimized the platform and scaled the infrastructure to allow the users' growth from 50,000 to 1 million.
  • Established application performance monitoring (APM), metrics, and performance dashboards to identify and diagnose real user experience issues across mission-critical services.
  • Refactored critical application workflows to improve server throughput, reliability, and page load performance.
  • Optimized MongoDB queries and indexing strategies, enabling users to search millions of records within seconds.
  • Improved platform resiliency by addressing production issues, including gateway timeouts, slow user flows, and application instability.
Technologies: Node.js, Heroku, MongoDB, React, Server-side Rendering (SSR), Optimization, Datadog, Sentry, Amazon, MongoDB Atlas, MERN Stack, Apollo, GraphQL, Refactoring, Leadership, Webpack, TypeScript, Express.js

Fractional CTO

2022 - 2022
Provenance
  • Defined the technical roadmap and partnered with stakeholders on product development strategy.
  • Architected and built the project's cloud infrastructure, CI/CD pipeline, and third-party integrations.
  • Led and mentored the engineering team through code reviews, technical guidance, and architecture decisions.
  • Established development workflows, engineering best practices, and tooling to improve delivery speed and maintain high code quality.
  • Identified technical risks proactively and prevented technical debt through continuous architecture reviews and engineering standards.
Technologies: Amazon Web Services (AWS), Amazon EC2, REST APIs, Databases, React, Node.js, CTO, Architecture, Technical Leadership, Solution Architecture, Minimum Viable Product (MVP), Software Architecture, CI/CD Pipelines, Leadership, Startups, Express.js

Front-end Engineer

2018 - 2019
Nash
  • Built interactive portfolio management interfaces and data visualizations to help users understand cryptocurrency holdings and transactions.
  • Implemented payment workflows and integrated third-party providers to support secure deposits and transactions.
  • Developed KYC and identity verification flows to support user onboarding requirements.
Technologies: D3.js, TypeScript, Styled-components, GraphQL, React, JavaScript, Websites, Development, Front-end, HTML, CSS, UI Development, Front-end Architecture, Front-end Development, Single-page Applications (SPAs), Storybook, Minimum Viable Product (MVP), User Interface (UI), Web Applications, Interactive UI, Unit Testing, Git, Dashboards, User Experience (UX), Startups, Crypto

React Developer

2018 - 2018
FastSwims
  • Designed and built a functional prototype of an event management platform for organizing swimming teams and swimming competitions.
  • Designed a new user interface based on the customer's prototypes.
  • Built a functional prototype from scratch as a single-page application.
Technologies: Redux-Saga, React, JavaScript, Front-end, CSS, HTML, Front-end Architecture, Front-end Development, Single-page Applications (SPAs), Prototyping, Minimum Viable Product (MVP), User Interface (UI), Web Applications, Interactive UI, Dashboards

React Developer

2018 - 2018
Glofox
  • Helped deliver a React Native project used for managing fitness studios.
  • Fixed various bugs and issues in the React Native project.
  • Optimized the React Native project for the Android platform.
Technologies: Redux, React Native, JavaScript, User Interface (UI), Startups

Lead Full-stack Engineer

2017 - 2018
Saycaster
  • Designed the full-stack architecture and built the platform using React, Node.js, and PostgreSQL.
  • Developed a complex single-page application with advanced interactions, animations, and dynamic content rendering. Implemented interactive visualizations and content experiences using D3.js and SVG.
  • Built the back-end REST API and data models for managing time-based audio content and interactive elements.
  • Integrated external services, including Amazon S3 for audio storage and social media APIs for embedded content.
Technologies: InVision, X (formerly Twitter) API, Webpack, SVG, D3.js, Redux, React, Knex.js, Objection.js, Koa, Node.js, JavaScript, PostgreSQL, Amazon S3 (AWS S3), Heroku, Development, APIs, Single-page Applications (SPAs), Full-stack Development, Front-end Development, Front-end Architecture, CTO, Technical Leadership, Minimum Viable Product (MVP), Full-stack, Back-end, Back-end Development, HTML, CSS, API Design, REST APIs, User Interface (UI), Software Engineering, SQL, Web Applications, Software Architecture, Architecture, Interactive UI, Databases, API Integration, User Experience (UX)

Pre-sales Engineer

2016 - 2017
ZeroTurnaround
  • Presented and demonstrated products to potential customers from all over the world.
  • Demonstrated product features to developer teams and showed how to use them in the development process with a specific workflow, environment, and toolset.
  • Helped sales associates close deals by presenting our products in specific use cases.
  • Trained sales associates on how to effectively present and sell our tools to developer teams and managers.
  • Assisted customers with installation, troubleshooting, and other customer services for configuration issues.
Technologies: Java, Consulting, IT Consulting, Sales, Tech Sales, Technical Consulting

Software Engineer

2015 - 2016
Ataccama
  • Worked mainly as a front-end developer on dashboards and data visualizations.
  • Implemented new features and fixed bugs in enterprise applications used for data quality management and rewrote UI components to modern technologies.
  • Designed and implemented the front end of an interactive application for customer data management.
  • Designed and implemented the server-to-sever communication and a server push in the GWT application.
Technologies: Errai, ActiveMQ, Java Message Service (JMS), JSTL, Jakarta Server Pages (JSP), D3.js, Gulp, Webpack, SCSS, Bootstrap, jQuery, Backbone.js, Immutable.js, Flux, React, Emacs, JavaScript, Java, APIs, HTML, CSS, User Interface (UI), REST APIs, Software Engineering, Web Applications

Data Visualization Developer

2013 - 2015
Techniserv, Taranzo
  • Analyzed, designed, and implemented solutions for gathering and processing structured and unstructured data from social networks and various other sources.
  • Designed and implemented a module for building and visualizing a social network.
  • Built data processing from social networks, such as YouTube and Twitter.
Technologies: JUNG, X (formerly Twitter) API, YouTube API, OrientDB, D3.js, Bootstrap, jQuery, JSTL, Jakarta Server Pages (JSP), Apache Maven, Spring MVC, Liferay, JavaScript, Java, APIs, Full-stack Development, Front-end Development, Software Architecture, Architecture, Back-end Development, Interactive UI, API Integration

Software Tester

2012 - 2013
Amberg Group
  • Executed both manual and automated tests and analyzed the results.
  • Developed and maintained the whole test infrastructure with automated tests.
  • Designed test cases, wrote documentation, and reported issues.
Technologies: Ruby, Python, JavaScript, Ruby on Rails (RoR), Selenium

Experience

Provenance

https://app.provenance.co/
Helped the team as a fractional CTO with strategic consulting on the product development roadmap. Managed and led a team of developers. I identified issues via code reviews before they were translated into technical debt, helped developers with best practices, and leveraged tooling to speed up the development process and ensure code quality. I also architected and built the project's infrastructure, CI pipeline, and third-party integrations.

GoSchoolBox

https://goschoolbox.com/
GoSchoolBox is a SaaS platform that serves as the technical infrastructure layer between school districts and tutoring companies. The number of users grew from 50,000 to 1 million. The GoSchoolBox platform has suffered many application stability issues, such as spontaneous error messages, gateway timeout errors, and slow page load times. As a software architect, I ensured platform stability, resiliency, and scalability. I helped the team to integrate and set up APM with metrics and performance dashboards to detect and diagnose end-users' experience with mission-critical services. I refactored and fixed critical user flows to improve user flow performance, server throughput, and page load performance. I optimized the MongoDB search performance to allow users to search millions of records within seconds.

Meridian

https://meridian-ai.com/
Meridian provides next-gen, AI-powered workflow tools to private investors. As a front-end technical lead, I was responsible for managing, inspiring, and guiding the front-end team through the intricacies of front-end development. One of my significant contributions was collaborating closely with the Product Designer. Together, we crafted a UI design system that was visually appealing but also intuitive and user-centric. This system became the cornerstone of the user experience, embodying the essence of Meridian’s innovative approach. I built the MVP from scratch and set up the CI pipeline for Meridian’s UI.

Burro

Burro, a leader in autonomous, collaborative farming robots, enhances agricultural productivity by automating load-carrying and field navigation tasks. To support their innovative technology, I developed an interactive web application enabling Burro’s customers to efficiently create and manage routes for their autonomous robots. The application features an intuitive map interface built with Leaflet.js, allowing users to draw, edit, and visualize custom routes and a dynamic tree view structure for organizing and managing route data. Integrating seamlessly with Burro’s back-end systems, the solution streamlined route management processes, offering customers a user-friendly tool to enhance their workflows and productivity.

Ouro Better Credit

https://www.ouro.com/
Ouro aimed to transform financial services with the launch of Better Credit, a cutting-edge web app designed to empower users to improve their credit scores. The platform combines a flexible credit line with an intuitive web wallet, offering users a seamless and user-friendly experience. In this project, I spearheaded the development of the web app, leveraging React, Next.js, and TypeScript to build a robust and scalable user interface.

3icap

https://www.3imembers.com/
An investment community platform for investors to discover deals and identify co-investors. The platform allows investors to interact with each other, keep track of deals, and create a virtual investment club for a curated group of private investors.

I designed and implemented the integration with 3rd-party services, such as DocuSign, Slack, and Stripe. I also helped the team set up the project tooling, fix various issues, and implement new features.

Stackbit

https://app.stackbit.com
Stackbit is a website builder that helps developers of any level build their Jamstack sites based on Next.js and Tailwind fast.

I helped Stackbit's team set up the tooling and design the architecture for the design system of the main platform. I assisted and mentored senior React developers on best practices and patterns to solve complex flows in React projects. I fixed various issues and bugs in the platform and on additional feature sets for enterprise clients.

Getctrl

https://www.getctrl.co/
Getctrl is a customer data platform for customer success professionals. It empowers post-sales people to bring data from different apps to create workspaces.

I developed new features and fixed the existing codebase as a front-end developer. I also helped and mentored senior React developers on best practices.

Nash.io

https://nash.io/
A blazing-fast static website built with React, Gatsby, TypeScript, and style components. All pages are fully responsive and optimized for mobile viewing.

I built this company website from scratch, adding and reusing existing components from Storybook.

Cryptocurrency Exchange Platform

https://app.nash.io/
A cryptocurrency exchange platform.

Joined the project as a React developer and implemented a design system, portfolio management, and payment systems. I used React, TypeScript, Storybook, and GraphQL.

Archipelago

https://archipelago.art/
Archipelago is a next-generation NFT marketplace that offers curated generative art NFTs. As a front-end consultant, I helped the team review the existing codebase, refactor problematic flows, and fix various bugs and issues.

Security Tokens Offering Platform

A secure, customer-centric, decentralized online securities exchange marketplace allows investors at all levels to buy and sell digital securities. The customer is a leading cryptocurrency exchange. I worked as a senior front-end engineer. I operated as an architect for front-end implementation and reviewed and audited the code of other front-end developers.

System Master Planner

A computational tool for master planners, energy and resource managers, and policymakers. It allows users to evaluate sustainability and resiliency scenarios for large buildings and other assets.

I worked as a React developer and developed interactive data visualization, rendering thousands of buildings as polygons on a LeafletJS map.

FastSwims

https://www.fastswims.com/
An event management platform for managing swimming teams and swimming competitions. I designed a new user interface based on customers' prototypes and built a functional prototype.

Development tools: JavaScript, React, and Redux-Saga.

Saycaster Rebranded to Bitcast

An interactive podcast platform with the following features:
• Podcasters can upload their audio and add 5-20 spots to their podcasts.
• These spots can be anything from links to social media posts to other videos or images.
• Listeners can listen and comment on these specific spots.

Note API Connector

https://noteapiconnector.com/
I built Note API Connector, a no-code integration platform that enables thousands of Notion users to connect APIs, automate workflows, and sync external data with their Notion workspaces. I designed and built the entire platform, including back-end infrastructure, authentication, scheduling, and an integration engine used by thousands of Notion users.

Potentials

I built the user interface for this eCommerce tool in React. It helped the CEO and sales associates to maintain and process details about potential customers. I built the user interface using React and Tailwind.

SushiSwap Migrator

https://sushi-migrator.vercel.app/
A Web3.js project where users can migrate LP positions from Uniswap to SushiSwap. Users can interact with the Ethereum blockchain through MetaMask, view the ERC-20 tokens list and LP positions, and add new ERC-20 tokens.

Vertigo

A project for a company in the marine industry. I worked as a data visualization specialist to build an interactive visualization of a Neo4j graph database. I developed this visualization in React, D3.js, and Storybook.

SalesforceToNotion

A Chrome browser extension that integrates data between Salesforce and Notion. It allows users to pull Salesforce data directly into the Notion workspace.

CHROME WEB STORE LISTING
https://chrome.google.com/webstore/detail/salesforcetonotion/dlebnfljbolfokomdlcdddgdopiaekeg

Filipi

Filipi is a furniture eCommerce store built with Next.js, Node.js, and MySQL. I helped the owner migrate the whole solution to another server, fix various issues and bugs in SEO, manage data, and set up analytics tools.

Tauchain

Created a Node.js back-end service that processes data from 3rd-party APIs like 3rd-party exchanges, GitHub API, Twitter API, and Telegram API. The server is deployed on AWS. I helped the client fix the project after previous developers and replaced the headless CMS solution.

Software Development Blog

https://andrejgajdos.com/blog
My freelance software development blog. It was built with WordPress and JavaScript. I blog about tips, tutorials, and technical solutions in development in JavaScript, React, Node.js, and related technologies.

Ivana Neckarova

A personal WordPress website, where I customized the template to achieve unique design and responsiveness for mobile devices. I set up WordPress plugins to improve website performance and search engine optimization.

Link Preview Generator

Get a URL's preview data (title, description, image, and domain name). I built this Node.js library that uses a Puppeteer headless browser to scrape the website and get the website's title, description, image, and others.

Neo Transfer

https://github.com/AndrejGajdos/neo-transfer
Neo Transfer allows you to log in with a private key, see balance, and transfer NEO or GAS within Testnet. The project is based on the JavaScript SDK for the NEO blockchain. The front end is implemented in React.

Newsfeed Cryptogoods

https://github.com/AndrejGajdos/newsfeed-cryptogoods
Newsfeed for events on crypto goods. A single, responsive page for the newsfeed. Polling occurs every 15 seconds for new events to update the newsfeed in real-time. This front-end project was built using JavaScript, React, Redux, Redux-Saga, and Twitter Bootstrap.

Authenticating Users in SPA using Node.js, Passport.js, React, and Redux

https://github.com/AndrejGajdos/auth-flow-spa-node-react
User authentication in a single-page application with Node.js, React, Redux, and Koa combined with Passport.

https://andrejgajdos.com/authenticating-users-in-single-page-applications-using-node-passport-react-and-redux/

Development tools: JavaScript, Node.js, React, Redux, Passport.js.

Nested Datatables

jQuery DataTables plugin for rendering nested data tables in rows. Inner tables are independent of the data and layout from the outer table. I created this plugin for a data management product.

Development tools: JavaScript and jQuery.

Webpack Setup for ES6, React, Sass, and Bootstrap

https://github.com/AndrejGajdos/webpack-react
Webpack configuration to bundle ES6, React, Sass, and Bootstrap for production and development.

https://andrejgajdos.com/setting-up-webpack-for-es6-react-sass-and-bootstrap/

Development tools: JavaScript, React, and Webpack.

Social Graph

A Liferay portlet to visualize a social network as a directed multigraph. Jung library is used for building the multigraph, which is stored in OrientDB. Visualization and other components are built in D3.js and Bootstrap.

Development tools: Java, JavaScript, Liferay, JSP, Jung, OrientDB, D3.js, Bootstrap

Sample Source Code

This source code is the front end of the application for customer data management. I developed everything but the login page and used technologies such as ES6 (Babel), React, Immutable.js, Bootstrap table, and webpack.

Instructions:

• Install Node.js from nodejs.org/en/download/.
• Install Bower from bower.io/#install-bower.
• Go to the project root directory in the terminal and install other dependencies, i.e., npm install and Bower install.
• Follow npm run start.
• Open the URL localhost:8080/ and type in:
a) User: andrej
b) Password: nachos

SVG Sprite into PNG

https://github.com/AndrejGajdos/svg-sprite-to-png
A workflow converts SVG sprite into PNG images utilizing Gulp.

https://andrejgajdos.com/how-to-convert-svg-sprite-into-png-images/

Development tools: JavaScript, Gulp

Server Push in GWT Application with Errai

https://github.com/AndrejGajdos/gwt-errai-messaging
Implementation of server push messages from server to client in GWT application with Errai framework.

https://andrejgajdos.com/first-steps-with-gwt-and-errai-messaging/

Development tools: Java, GWT, Errai

Contract Generator Tool

Some insurance brokers have a list of insurances and clients in XLS format and need to generate various contracts based on a contract template in DOC and DOCx format. The user can set up a database (XLS or XLSx) and required columns, which will be parsed into the contract. The application has a database of insurance in SQLite. The main window contains a list of clients with detailed information, where the user can instantly search clients, add required information (date, overpayment, insurance from database), choose contract templates, and generate a contract (DOC or DOCx) for the client. The UI is built in WPF and ADO.NET is used for parsing data from a Microsoft Excel file.

Development tools: C#/.NET, WPF, SQLite, ADO.NET

Personal Calendar

https://github.com/AndrejGajdos/personal-calendar
A basic personal calendar application with two view modes (week/month). The application generates log files and uses a MySQL database. The presentation layer is built in Swing and SwingWorker. Connections to the database are developed in JDBC. The project contains simple JSP pages for viewing a list of events and their detailed information.

Development tools: Java, JSP, Swing, SwingWorker, MySQL, JDBC
Image of Guide to Data Synchronization in Microsoft SQL Server publication
Publication

Guide to Data Synchronization in Microsoft SQL Server

https://www.toptal.com/developers/sql/guide-to-data-synchronization-in-microsoft-sql-server
Image of A Guide to Managing Webpack Dependencies publication
Publication

A Guide to Managing Webpack Dependencies

https://www.toptal.com/developers/javascript/a-guide-to-managing-webpack-dependencies

Education

2013 - 2015

Master's Degree in Service Science, Management, and Engineering

Masaryk University Brno - Brno

2014 - 2014

Erasmus Exchange Student in Master in Innovation and Research in Informatics

Polytechnic University of Catalonia - Barcelona

2009 - 2013

Bachelor's Degree in Applied Informatics

Masaryk University - Brno

Skills

Libraries/APIs

React, Node.js, React Router, REST APIs, Atomic CSS, Passport.js, Redux-Saga, D3.js, Immutable.js, JSTL, jQuery, JavaScript Charting, Stripe, Stripe API, HubSpot API, AWS Amplify, GitHub API, X (formerly Twitter) API, YouTube API, Objection.js, JDBC, Backbone.js, Java Message Service (JMS), Leaflet, MobX, Web3.js, Puppeteer, Slack API, Salesforce API

Tools

Git, Claude, Claude Code, Redux Thunk, Webpack, Gulp, Emacs, PostCSS, Knex.js, GitLab, GitHub Pages, GitHub, Trello, InVision, ActiveMQ, Apache Maven, CircleCI, Figma, LaunchDarkly, Slack, Notion, Sentry, MongoDB Atlas, NPM, Notion API

Languages

CSS, HTML, CSS3, HTML5, Python, JavaScript, TypeScript, Java, SCSS, Sass, ECMAScript (ES6), SQL, GraphQL, C, Ruby, PHP, C#, C++

Frameworks

Express.js, Redux, Next.js, Vanilla JS, Koa, Bootstrap, Spring MVC, Flux, JUnit, Tailwind CSS, Material UI, Errai, React Native, Ruby on Rails (RoR), Jakarta Server Pages (JSP), Swing, Windows Presentation Foundation (WPF), .NET, Jest, Cypress, Selenium

Paradigms

Model View Controller (MVC), Unit Testing, Role-based Access Control (RBAC), Automation, Object-relational Mapping (ORM), Agile Software Development, Functional Programming, REST, Object-oriented Programming (OOP), Object-oriented Design (OOD), Software Testing, Automated Testing, Search Engine Optimization (SEO), Requirements Analysis, Web Architecture, Responsive Layout, Agile, Refactoring

Platforms

Vercel, Amazon Web Services (AWS), Firebase, Java EE (Jakarta EE), WordPress, Contentful, Amazon Lightsail, AWS Lambda, OS X, Heroku, Amazon, MacOS, Linux, Blockchain, X (formerly Twitter), Amazon EC2, Web, Mapbox, Visual Studio Code (VS Code), Salesforce

Storage

JSON, PostgreSQL, Amazon S3 (AWS S3), Graph Databases, SQLite, MySQL, OrientDB, MongoDB, Relational Databases, Databases, Datadog, Cloud Firestore

Industry Expertise

Healthcare

Other

API Integration, Responsive UI, UI Development, Ajax, Back-end Development, Front-end, Single-page Applications (SPAs), Web Development, Styled-components, Chrome Extensions, Full-stack, Front-end Development, Front-end Architecture, Architecture, Software Architecture, Websites, Development, Full-stack Development, React Hooks, Web App Development, Minimum Viable Product (MVP), User Interface (UI), Atomic Design, Software Engineering, Web Applications, Interactive UI, Dashboards, UI Components, UI Libraries, Component Libraries, Startups, Technical Architecture, Platforms, Data Modeling, System Architecture, Multi-tenant SaaS, Code Review, Multi-tenant Architecture, Integration, Vibe Coding, Hands-on Implementation, High Code Quality, Integrations, APIs, Back-end, ESLint, Technical Consulting, Writing & Editing, Data Visualization, Presentations, Sales, Customer Service, Consulting, Programming, Software Design, CTO, Technical Leadership, Solution Architecture, eCommerce, Slate, Responsive Design, Apollo, User Experience (UX), MERN Stack, Leadership, Cloudflare, SaaS, Education Technology (Edtech), Artificial Intelligence (AI), Data Engineering, Payments, Marketplaces, Payment APIs, Data Extraction, Infrastructure, Scaling, Fractional CTO, Security, CRM, Prismic, Webhooks, Storybook, JUNG, SVG, Web Scraping, Social Networks Development, Data Analysis, Liferay, BPM, Messaging Patterns, Sales Presentations, Ethers.js, Scraping, Prototyping, IT Consulting, Tech Sales, CSS-in-JS, Technology Consulting, Team Leadership, Local SEO, API Design, Strapi, Solution Design, APM, Performance, Server-side Rendering (SSR), UI Testing, CI/CD Pipelines, Optimization, Crypto, Non-fungible Tokens (NFT)

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