I am a Senior Full-Stack Engineer with more than six years of commercial experience building B2B and SaaS products from data modeling through production deployment. My core stack is React, Next.js, Node.js/NestJS, TypeScript, and PostgreSQL.
I design scalable multi-tenant systems, modular monoliths, event-driven APIs, background-worker architectures, and monorepos. I am experienced in building secure, production-grade applications with tenant isolation, OIDC authentication, GDPR-aware logging, and CI quality gates.
I have delivered more than 20 web applications for B2B clients and actively develop SaaS platforms in domains including German e-invoicing, healthcare, HR technology, travel, booking, and website builders. My work includes integrations with Stripe, Google Calendar, AWS services, external APIs, and AI platforms.
I lead teams and remain highly hands-on in coding. I have led teams of up to 10 developers, established coding guidelines, conducted reviews, made architecture decisions, and coordinated work between product stakeholders and sprint teams.
I use AI-assisted development daily with Claude Code, Cursor, and Copilot, while maintaining engineering quality through automated testing, reviews, and CI gates. I have practical experience integrating LLMs, RAG, vector search, OCR, and privacy-preserving PII redaction into products.
I am based in Altena, Germany, and work remotely. I communicate professionally in English and German and am a native Ukrainian speaker.
Technical lead for a React and TypeScript platform, leading a team of 10 developers. Established coding guidelines, conducted code reviews, and made architecture decisions.
Acted as the interface between the CEO, product owner, and sprint teams, facilitating daily meetings and planning. Led the platform and team through product presentation at Web Summit Lisbon and introduced custom AI agents into review processes.
Led migration to a Turborepo monorepo with shared UI and template packages, reducing build times by 40%. Maintained a versioned Storybook component library and migrated modules from JavaScript to TypeScript.
Built an AI chat widget for creator pages using NestJS and React, including rate limiting and fallback handling. Integrated booking functionality with Google Calendar, Stripe payments, and the Rewardful affiliate program.
Delivered more than 20 web applications for B2B clients through freelancermap, Upwork, and Freelancehunt. Built and operated production systems across SaaS, healthcare, HR technology, travel, booking, and AI document processing domains.
Developed solobuch.de, an e-invoicing and bookkeeping SaaS for freelancers using Next.js, Prisma, PostgreSQL, Redis, Docker, Traefik, and Hetzner. Implemented EN 16931 invoicing, XRechnung, ZUGFeRD, DATEV exports, VAT reporting, GitHub Actions deployments, and over 150 automated test files.
Built multi-tenant platforms using Next.js, NestJS, BullMQ, Redis, PostgreSQL Row-Level Security, Keycloak, and Zod contracts. Delivered AI document-processing solutions with OCR, AWS Bedrock, FastAPI-based PII redaction, zero-downtime deployments, and Grafana/Loki/Sentry observability.
Provided web solutions and technical consulting for clients across multiple industries.
Supported clients with application development, technical problem solving, and digital product implementation.
Master of Science
Master of Science degree.
Web Development Certificate, Node.js, TypeScript, Docker, Cloud
Web development certificate covering Node.js, TypeScript, Docker, and cloud technologies.
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