I've spent 5+ years building production software at Oracle, Amazon, Booking.com, DataFlow and Microsoft — banking platforms, seller verification, payments, document workflows and family-safety systems.
Since February 2026 I've been applying the same instincts to independent products and developer tools — and shipping them.
I care about systems that are rigorous underneath and straightforward to use.
Things I've built with
tool — where it was usedLanguages
- Java
- Oracle · Amazon · Booking.com
- C# / .NET
- Microsoft
- TypeScript
- DataFlow · Microsoft · Kelson · where2?
- Python
- Context Runtime · ApplyPilot
- Swift
- PIKY
- JavaScript Oracle, Microsoft, ApplyPilot
- SQL Oracle, Kelson, Context Runtime
- HTML / CSS Microsoft, DataFlow
Backend & frameworks
- Spring Boot
- Oracle · Amazon · Booking.com
- Node.js
- DataFlow · Oracle
- Spring MVC Oracle
- REST APIs & microservices Booking.com, Amazon, Oracle
- Adyen / Bank of America Booking.com
- Nearley Oracle
- Pydantic Context Runtime
Distributed & event-driven
- Kafka
- Oracle
- SQS
- DataFlow · Amazon
- State machines & workflow engines
- DataFlow
- Concurrency control
- Amazon
- SNS DataFlow, Amazon
- ZooKeeper Oracle
- Event Grid Microsoft
- Event-driven architecture Oracle, DataFlow, Microsoft
Cloud & data
- AWS
- Amazon · DataFlow
- Azure
- Microsoft
- DynamoDB
- Amazon · DataFlow
- Cosmos DB
- Microsoft
- S3 DataFlow
- Azure.Data.Tables Microsoft
- MySQL Oracle
- Flyway Oracle
- PostgreSQL / Supabase Kelson, where2?
- SQLite Context Runtime, ApplyPilot
Identity & security
- Managed Identity
- Microsoft
Platform & operations
- Service Fabric
- Microsoft
- Kusto (KQL) / Geneva
- Microsoft
- GitHub Actions ApplyPilot
- Bazel Booking.com
- Perl Booking.com
- Apache Velocity Oracle
- PyInstaller Context Runtime
- Vercel Kelson, where2?
AI systems & document automation
- OpenAI
- DataFlow · Kelson
- LangChain
- DataFlow
- MCP
- Context Runtime · Kelson
- Tesseract OCR
- DataFlow
- Puppeteer DataFlow
- Playwright ApplyPilot
- Report & PDF generation DataFlow
- Gemini Kelson, ApplyPilot
- Human-in-the-loop Kelson, ApplyPilot, Context Runtime
Built into products. The assistants I code with are under How I build now.
Frontend & native
- React
- Microsoft · Kelson · where2?
- Fluent UI
- Microsoft
- AppKit / macOS APIs
- PIKY
- Next.js Kelson, where2?
- macOS Accessibility PIKY
- NSPasteboard PIKY
- ScreenCaptureKit PIKY
- Chrome MV3 extension ApplyPilot
- GitHub REST / Octokit Kelson
- MapLibre where2?
Also on my résumé C++ · SQL Server · Docker · Kubernetes · Jenkins · Azure Pipelines
How I build now
Co-building tools — Claude Code · OpenAI Codex · GitHub Copilot · Gemini / AntigravityAI is part of how I build — architecture exploration, implementation, refactoring, debugging, codebase analysis and tests. The architecture, the review, the correctness and the final technical calls stay mine.
01
Context discipline
Tools get clean, verified local context and real schemas — not guesses.
02
Implementation velocity
AI speeds up scaffolding, tests and multi-file refactors across a codebase.
03
Human checkpoints
Architecture trade-offs, state changes and edge cases are reviewed by me before they ship.