Denys Z.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I build scalable, reliable web platforms and enterprise systems with a focus on clean architecture and long‑term maintainability. My core stack is Laravel, Symfony, and API Platform, and I use them to deliver high‑performance backends, well‑documented APIs, and modern full‑stack solutions. I’ve delivered complex systems in FinTech, ERP, government, SaaS, and geospatial domains. I care about clear code, Domain‑Driven Design, and systems that can evolve without breaking. What I’m best at • Laravel & Symfony: enterprise apps, custom packages, REST APIs • API Platform: REST/GraphQL, JSON‑LD, OpenAPI/Swagger • Architecture: DDD, Hexagonal, CQRS, Event‑driven systems, RabbitMQ for async messaging • Real‑time: WebSockets, Mercure • Databases: MySQL, ClickHouse, PostgreSQL, PostGIS, FTS, pgRouting, Elasticsearch • Observability: Kibana (log analysis), Grafana (metrics/dashboards) • Frontend: Vue, Nuxt, React, Next.js • Infrastructure: Docker, Linux, NGINX/Apache, Redis • AI Coding Agent: daily use of GPT/Codex & Claude Code for faster scaffolding, refactoring, test generation, and cleaner code How I help clients • Build or modernize Laravel/Symfony applications • Design secure, versioned APIs for web/mobile clients • Add real‑time features and messaging • Optimize performance: queries, indexing, caching, Elasticsearch, async processing with RabbitMQ • Deliver geospatial systems with PostGIS and OSM • Stabilize and scale existing codebases • Set up Kibana + Grafana monitoring for logs, metrics, and system health • Deliver cleaner, better‑documented code faster by leveraging AI Coding Agents (GPT/Codex, Claude Code) in my daily workflow If you need a senior engineer who can own the backend architecture, deliver clean code, and communicate clearly, let’s talk.