Proof, not
adjectives.
Every number below is already published in my public CV. NDA work stays unnamed.
Payments · .NET
1M+ req/day
Mastercard Payment Services Denmark
Full-stack .NET work on critical Danish payment infrastructure, including Betalingsservice and Leverandørservice. Public CV states an API handling 1M+ requests/day and a fraud-detection improvement associated with a 15% reduction in fraudulent transactions.
Government · RabbitMQ · WPF
30% faster
Slovak customs administration
Worked on a critical customs-system upgrade with real-time declaration tracking, RabbitMQ, Dapper and WPF/DevExpress. Public CV reports 30% faster customs processing and 25% faster asynchronous declaration processing.
C++20 · Multi-region
10k+ miners
High-throughput C++20 backend · NDA
Built a mining server from first commit to production for a platform serving 10,000+ miners across 5+ continents. Implemented networking, share validation, adaptive difficulty, multi-region infrastructure and near-zero-downtime blue/green rollout.
Founder · React 19 · Stripe
2,300+ commits
Evolved
Built and launched a complete commerce platform from zero using React 19, TypeScript, Vite SSR, Express, MongoDB and Redis, including Stripe, webhooks, invoicing, shipping, VAT logic, security, analytics and SEO. Public CV records Lighthouse 93–96 and 2,300+ commits across four production codebases in 14 months.
Credit data · MSSQL
17+ banks
CRIF Slovak Credit Bureau
Worked on Credit Navigator, institutional credit-data workflows and database/API performance across systems used around 17+ banks.
MCP · TypeScript
Open source
Open-source AI tooling
Published a Codex MCP server bridging Codex CLI into Claude Code and other MCP clients for non-interactive automation, sandboxed edits and code analysis.