Bogdan Stroe
Verified Expert in Engineering
Full-stack Developer
Puerto de la Cruz, Spain
Toptal member since April 22, 2020
Bogdan has more than 15 years of professional experience as a full-stack and mobile app developer. His career includes three years as an IBM app developer and more than five years as an electronic arts software engineer. He has led and participated in all phases of development from client meetings through release and subsequent updates. Bogdan has won prizes at national and international programming contests.
Portfolio
Experience
- Full-stack - 15 years
- ACM Problem Solving - 10 years
- Node.js - 8 years
- JavaScript - 8 years
- Java - 7 years
- React - 5 years
- Angular - 5 years
- Python - 5 years
Preferred Environment
Subversion (SVN), Git, Apache Maven, Jenkins, TeamCity, Model View ViewModel (MVVM), ASP.NET Core MVC, REST APIs, Object-oriented Programming (OOP), React, Django, Angular, CSS, HTML, MongoDB, SQLite, PostgreSQL, MySQL, Microsoft SQL Server, C#.NET, Jakarta EE (Java EE or J2EE), Python, Node.js, JavaScript, C++, C
The most amazing...
...projects I've worked on as a developer were FIFA and Harry Potter mobile games that sold millions of copies worldwide.
Work Experience
Full-Stack TypeScript Engineer for AI Powered Financial/Document Processing platform
Thinking Machine Systems Ltd.
- Developed new features and solved bugs using AI models, specifically ChatGPT and Claude.
- Building performant REST APIs (pagination, filtering, caching, rate limits).
- Managed a stable, fully developed AI-enabled platform during an exciting company transition phase.
Senior Full-stack Developer
Self-employed
- Worked as a freelance senior full-stack developer for several large-scale and startup apps as a member of agile teams or as an individual contributor.
- Created entire apps from conception to finished products, added new features, and fixed bugs.
- Built back-end website applications using REST APIs.
- Developed front-end website architecture and designed user interactions on web pages.
- Set up databases, servers, and virtual machines to ensure optimal functionality.
- Wrote unit, end-to-end, integration, functional, acceptance, performance, and smoke tests.
- Led cross-functional teams, which included my direct reports. Team sizes were from four to eight people.
- Took part in the hiring process as a technical screener.
- Built an internal Excel-based tool (dashboards, pricing models, automated reports) using advanced formulas, pivot tables, and Power Query, supporting finance, operations, and sales teams in streamlining daily tasks.
React Native Mobile Engineer
Code Particle Inc.
- Used Jakarta EE to create the back end for the CrowdStrike mobile app.
- Covered more than 90% of the code with Unit, Integration, and E2E tests.
- Used SwiftUI to create the front end for the CrowdStrike mobile app.
Back-end Java Developer
Bilt Technologies Inc
- Developed a back-end integration solution between a Bilt card and a fitness company.
- Tracked and fixed bugs using Jira as a reporting tool.
- Participated in architecture and design meetings for the back-end.
Back-end Node.js/Python Developer
Advertise Purple, Inc
- Built the back end in Node.js in multiple microservices, with every affiliate network collecting and transforming data before storing it in a database.
- Developed a new application to store and show affiliate network statistics.
- Used Amazon Redshift for big data storage, which resulted in the API response time of a few milliseconds per request.
Senior Full-stack Developer
Toptal Client
- Co-developed the front end of an internal search engine for Pfizer, as well as other aspects of the full stack.
- Played a key role, from the initial phase of the project, in developing entire new features and fixing bugs.
- Received positive feedback from the stakeholders as the search engine was rolled out.
Senior Software Engineer
Fresenius Medical Care
- Utilized ThingWorx to connect to existing dialysis machines and monitor them in real time.
- Generated alerts or abnormal conditions of the data received using ThingWorx.
- Delivered critical insights with data trending and analysis using ThingWorx.
Tech Lead | Product Owner
Fresenius Medical Care
- Led a cross-functional team that developed one of the company's main products. Was a hands-on tech lead and took ownership of deliverables.
- Participated in all phases of the development, from client meetings to release.
- Led the design and architecture of the product and oversaw the development process.
- Aligned project execution with the strategy, mission, culture, and ethics of the organization.
- Hired, coached, and reviewed the performance of most members of the team(s).
Application Developer
IBM
- Developed the back end for a large-scale enterprise resource planning application.
- Added new features and fixed bugs using best practices.
- Participated in project teams and performed systems and data analysis, design, development, integration, enhancement, and maintenance activities.
- Took part in the screening process as a technical screener.
Senior Software Engineer
Softwin
- Contributed to a natural language processing (NLP) project.
- Developed algorithms and data structures used for language translations.
- Researched innovative NLP algorithms and developed and integrated them with the product.
- Took part in the screening process as a technical screener.
Senior Software Engineer
Electronic Arts
- Developed games for mobile devices such as Harry Potter, FIFA 09, and Command & Conquer: Red Alert.
- Spearheaded the development of an intern tool as the team leader and associate producer.
- Developed AAA titles that sold more than ten million copies worldwide.
- Took part in the screening process as a technical screener.
Software Engineer
Gameloft
- Participated in small teams to develop many mobile games such as Driver, Asphalt, Hunting, and Lumines.
- Adapted the existing codebase to fit the size and speed requirements of different phones.
- Worked on AAA titles that sold more than 10 million copies worldwide.
Experience
Internal Search Engine for Pfizer
• An original similarity algorithm.
• A password-protected interface for calling the algorithm and getting back a ranked list of similar things.
• An interface enabling users to customize the algorithm for any given search and save one or more customizations by name for their login.
• An interface for reviewing the details of any investigation or “element” returned by the search.
• An interface for visualizing and navigating the many related elements of investigations and their timing, as well as providing links to related groups
of each of these elements.
PatientOnLine
IBM ACG ERP
FIFA 09 Mobile Game
https://www.ign.com/games/fifa-09-mobileHarry Potter Mobile Game
https://www.ign.com/games/harry-potter-and-the-half-blood-prince-mobileSOFTWIN NLP
Education
Master's Degree in Management and Business Administration
University of Economics Bucharest - Bucharest, Romania
Master's Degree in Computer Science
University Politehnica of Bucharest - Bucharest, Romania
Bachelor's Degree in Computer Science
University Politehnica of Bucharest - Bucharest, Romania
High School Diploma in Computer Science
Tudor Vianu National College of Computer Science - Bucharest, Romania
Skills
Libraries/APIs
Node.js, React, REST APIs, Vue, API Development, Claude API, D3.js, AngularUI, React Redux, jQuery, NgRx, Twilio API, BigCommerce API, Selenium WebDriver, Stripe, SQLAlchemy, React Router, OpenAI API, Vue 3, GraphQL API, Playwright, Stripe API, Entity Framework, HubSpot API, WebGL, Salesforce API, Windows Forms (WinForms), Gmail API, Google Calendar API, React Query, React Testing Library, Django ORM, WebRTC, Google Maps, Pandas, Chart.js, NumPy, Zarr, Pydantic, Azure API Management, OpenAPI, Java Servlets, MobX, Azure Cognitive Services, Shopify API, Sage, Three.js, React Navigation, React Native for Web, Auth, TanStack Table
Tools
Git, Jira, GitHub, Webpack, Figma, Adobe Experience Manager (AEM), Microsoft Excel, Claude, Claude Code, Visual Studio, Angular CLI, Google Analytics, Terraform, Babel, C#.NET WinForms, Google Workspace, Amazon Simple Queue Service (SQS), React Apollo, Slack, Azure Logic Apps, Auth0, Kafka Streams, Mocha, Pytest, AWS Glue, Bitbucket, NPM, ChatGPT, Logging, AWS Step Functions, Prisma, GitHub CLI, Retool, Apache Solr, IntelliJ IDEA, Codex, TeamCity, Jenkins, Apache Maven, Subversion (SVN), JSX, Puppet, Ansible, Microsoft Intune, RabbitMQ, Microsoft Power Apps, Odoo, Microsoft Power BI, SendGrid, Microsoft Dynamics CRM, Dynamics 365 Business Central, Bundler, AWS CloudTrail, Xcode, Google Optimize, Grafana k6, Observability Tools, ANTLR, Azure App Service, Notion, Apache Avro, BigQuery, Adobe Photoshop, Jetty, Microsoft Copilot, Amazon EKS, Canvas, WebView, Tree-Based Pipeline Optimization Tool (TPOT), Adobe, Azure Active Directory B2C (ADB2C)
Languages
C#, SQL, C++, C#.NET, JavaScript, Python, Java, HTML, CSS, TypeScript, GraphQL, C, Go, Python 3, Swift, HTML5, XML, XSLT, Dart, CSS3, Rust, Sass, PHP, Snowflake, VB.NET, Erlang, Ruby, Kotlin, ECMAScript (ES6), Markdown, Scala, SAML, Bash, Bash Script, Erlang (OTP)
Frameworks
.NET, Django, Angular, Redux, Express.js, React Native, Spring, NestJS, ASP.NET, Windows PowerShell, Next.js, Spring Boot, Tailwind CSS, .NET Core, Ruby on Rails (RoR), ASP.NET Web API, JSON Web Tokens (JWT), Material UI, AngularJS, Hibernate, Cypress, Flutter, Flask, Jest, Bootstrap, Selenium, ASP.NET Core, Blazor, Spring Microservice, OAuth 2, .NET 8, Serverless Framework, Core Services, Angular Material, ASP.NET Core MVC, .NET 4, .NET 6, Razor Pages, Laravel, Django REST Framework, Entity Framework Core, SwiftUI, iOS SDK, Swagger, Juju, Agentic Frameworks, AWS HA, LlamaIndex, Fastify, Spring Batch, LangGraph, Nuxt.js
Paradigms
Agile, Object-oriented Programming (OOP), Management, Agile Software Development, REST, Unit Testing, Microservices, Clean Architecture, MVC Design, Scalable Application, ETL, Event-driven Architecture, KISS, CRUD, Dependency Injection, Test Automation, Manual Testing, REST API Architecture, Code Refactoring, Refactoring, Role-based Access Control (RBAC), Test-driven Development (TDD), Testing, Continuous Integration (CI), MEAN Stack, Design Patterns, Behavior-driven Development (BDD), Serverless Architecture, Responsive Web Design (RWD), Microservices Architecture, Event-driven Programming, DevOps, Application Architecture, Back-end Architecture, Mobile Development, Automated Testing, UI Design, DRY, API/Services Architecture, Constraint Programming, Database Design, Automation, Web Architecture, UX Design, HIPAA Compliance, Search Engine Optimization (SEO), Penetration Testing, Model Context Protocol (MCP), Requirements Analysis, Model View ViewModel (MVVM), Lambda Architecture, Continuous Delivery (CD), Event-driven Design (EDD), Azure DevOps, Mobile Design, Microfrontends
Platforms
Amazon Web Services (AWS), Firebase, Docker, AWS Lambda, Azure, SharePoint, BigCommerce, Azure Functions, WordPress, Visual Studio Code (VS Code), Microsoft Copilot Studio, Shopify, Google Cloud Platform (GCP), Kubernetes, Apache Kafka, Webflow, Vercel, Sitecore Experience Manager Cloud (XM Cloud), Microsoft Power Automate, iOS, Android, WordPress VIP, PostHog, Heroku, Microsoft, Linux, J2ME, Jakarta EE (Java EE or J2EE), Oracle, Windows, Twilio, ThingWorx, Salesforce, Microsoft Dynamics 365, MacOS, Amazon EC2, Azure Event Hubs, Ubuntu, Databricks, Cloud Run, Apache Arrow, Mobile, HubSpot, LAMP, Microsoft Power Platform
Storage
MySQL, PostgreSQL, Microsoft SQL Server, MongoDB, JSON, Elasticsearch, Databases, Relational Databases, Amazon DynamoDB, NoSQL, SQLite, Amazon S3 (AWS S3), Redis, Data Pipelines, RDBMS, Amazon Aurora, Database Modeling, Database Architecture, Neo4j, Data Integration, Cloud Firestore, Microsoft Entra ID, Azure SQL Databases, IBM Db2, SQL Server Reporting Services (SSRS), SQL Server Integration Services (SSIS), Azure Cosmos DB, Google Cloud, Redis Cache, Google Cloud SQL, Google Cloud Spanner, Datadog, Azure Cloud Services, On-premise, Azure SQL
Industry Expertise
Project Management, System Development Life Cycle (SDLC), Healthcare, Web Design, Marketing, Insurance
Other
Software Development Lifecycle (SDLC), APIs, ACM Problem Solving, Technical Leadership, Software Engineering, Architecture, Algorithms, Data Structures, Full-stack, Back-end, Front-end, Back-end Development, Full-stack Development, Integration Testing, Integration, Leadership, FastAPI, Domain-driven Design (DDD), Writing & Editing, API Integration, RESTful Services, IT Management, Delivery Management, Engineering Management, Functional Safety, ISO 26262, Business Architecture, Enterprise Architecture, Software Design, Workflow, CTO, Solution Architecture, RESTful Microservices, Software Development, SharePoint Online, Office 365, Web Development, Software Architecture, Quality Assurance (QA), Business Services, Minimum Viable Product (MVP), Product Management, SDKs, API Gateways, Artificial Intelligence (AI), Front-end Development, Distributed Systems, Team Leadership, Software QA, Data Management, Team Management, IntelliJ SDK, Git Flow, Code Review, API Design, ESLint, Data Visualization, Graph Theory, Large-scale Projects, JSON REST APIs, Documentation, Web Scraping, Fractional CTO, New Products, Software as a Service (SaaS), Strategy, Programming, Optimization, RESTFul APIs, Enterprise, Jira Administration, Log Analysis, TypeORM, Performance, .NET Framework, Bug Fixes, Agentic AI, Mobile App Testing, Startups, Data Engineering, Proof of Concept (POC), Engineering, AI Integration, Debugging, Manual Software Testing, Team Mentoring, Problem Solving, Critical Thinking, AI Tools, Non-relational Databases, API Management, Dashboards, Communication, Firebase Cloud Functions, Generative Artificial Intelligence (GenAI), Product Management, Agile Product Management, Lead Conversion, AI-assisted Development, Prompt Engineering, Multi-tenant SaaS, Authentication, Google Tag Manager, Acceptance Criteria, Test Management, Scripting, Coding, IT Strategy, Identity & Access Management (IAM), Ticketing Systems, Multi-factor Authentication (MFA), Troubleshooting & Issue Resolution, User Onboarding, Code Auditing, Azure Function App, Multi-agent Systems, Customer Identity and Access Management (CIAM), Games, User Experience (UX), User Interface (UI), MERN Stack, Web Components, CI/CD Pipelines, Serverless, Applications, Incident Management, System Administration, Ajax, Containerization, Embedded Systems, Responsive Design, Cross-browser Compatibility, SaaS, Loyalty Programs, Machine Learning, Natural Language Processing (NLP), SOAP, Endpoint Security, Industrial Internet of Things (IIoT), ServiceNow, Message Queues, Payment Gateways, QA Automation, Cloud Architecture, Technical Architecture, Troubleshooting, Technical Writing, Standard Operating Procedures Development, Infrastructure as Code (IaC), Single Sign-on (SSO), Storybook, Computer Vision, Data Science, Web Usability, React Hooks, OpenAI, eCommerce, Customer Relationship Management (CRM), Manual QA, QA Testing, AWS Cloud Architecture, Migration, Sitecore, Progressive Web Applications (PWAs), Web Security, Single-page Applications (SPAs), Headless CMS, Amazon RDS, Amazon API Gateway, Amazon EventBridge, Front-end Architecture, Business Analysis, JDE, Fintech, Startup Consulting, Mathematics, Data Analytics, Content Management Systems (CMS), Enterprise Resource Planning (ERP), Stakeholder Management, Large Language Models (LLMs), Cursor AI, WebSockets, AI Agents, Cloud, Product Design, GraphDB, Product Engineering, Command-line Interface (CLI), Analytics, UI Testing, Finance, Computational Algorithms, Computational Geometry, GPU Computing, Distributed Architecture, UI Components, AI-generated Code, Microsoft Azure, Okta, API Testing, Quality Control (QC), Software Testing Automation Framework (STAF), Application State Management, Zustand, System Integration, Gemini, Business Process Automation, Event-driven Systems, Workflow Design, Page Speed Optimization, Server-side Rendering (SSR), Vulnerability Assessment, Security, Amazon Web Services (AWS), Databricks, Salesforce, AWS Database Migration Service (DMS), Caching, Observability, Marketplaces, Workflow Automation & System Integration, Lean Project Management, Simulations, Agentic Engineering, Audits, IT Support, Operations, Data Collection, Agentic AI Systems, IT Security, Speech-to-Text (STT), Support & Maintenance, Encryption, Reporting, Compliance, AI Agent Orchestration, AI Automation, Modular, Smoke Testing, Agentic Coding, HIPAA, Temporal, Business Administration, Computer Science, Lambda Functions, Systems Analysis, Networks, Firewalls, Analytical Dashboards, Data Mining, Gaming, Video Gaming, Office Add-ins, OAuth, eCommerce APIs, Pywin32, Language Models, Technical Diagrams, Quarkus, Image Processing, Deployment, Data Architecture, Data Cleansing, Data Analysis, Automated UI Testing, Cloud Services, CEO, Mobile First, JetBrains IDE, Plugins, Gifting, Shipping Management, Amazon CloudSearch, Responsible AI, Sphinx, Large-scale Distributed Systems, Relational Database Services (RDS), OpenAI GPT-4 API, Tailwind UI, Data, Springbot, SAML-auth, Fulfillment, Shipping, CSV File Processing, Multithreading, Data Annotation, Data Labeling, Payment APIs, Point of Sale, Dash, Large Data Sets, Real-time Data, Webhooks, Data Encryption, Hash, Hypervisors, Architectural Engineering, Data Modeling, Robotic Process Automation (RPA), Streaming, Abstract Syntax Trees (AST), AI Chatbots, Async Batch Processes, Cloudflare, Mux, Upstash, Apollo, Agile DevOps, Performance Tuning, Branding, LangChain, Pinecone, Qdrant, Retrieval-augmented Generation (RAG), ISO 27001, PCI Compliance, OfficeJS, Excel Add-ins, Office.js API, SQA, GitHub Actions, Graphics Processing Unit (GPU), Mobile Apps, Artificial General Intelligence (AGI), Video Streaming, Videos, Community Management, Data Extraction, Document Parsing, Native Mobile Apps, Cloud Infrastructure, Data Processing, Reverse Engineering, Chromium, Systems Engineering, Azure Databricks, Sage ERP, Scalable Architecture, Data Build Tool (dbt), Data Migration, Supabase, Static Site Generators, Core Web Vitals, Agentic RAG Systems, Figma Make, Networking, Cloud Networking, Optical Character Recognition (OCR), Cloud Governance, Azure AI Services, SQL Server, Microsoft Entra External ID, DLL, Multitenancy, User Management, Orchestration
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