Dario K.

Full-Stack Engineer | Golang & React | SaaS, Fintech, MVPs

I'm a full-stack engineer (Go, Node.js, React, PostgreSQL) who has shipped a live FX trading platform, order-processing and event-management systems. Top Rated on Upwork, 6+ years in production. If you need someone who can make the architecture decisions AND build both ends, from database schema to dashboard, that's what I do. You get clean, documented code your team can own from day one. PROOF 🔹 Fintech: built the trader dashboard and transaction backend for a live FX trading platform. Real-time data, strict correctness, tests and error handling that hold up when real money is moving. 🔹 Order processing and event management: production systems built end-to-end, from schema and APIs to the admin UI. WHAT I DO 1. Full-Stack Product Development 🔹 I take your product from spec to production: frontend, backend, database, deployment 🔹 Clean architecture your team can extend without rewrites 2. Backend (Golang, Node.js) 🔹 High-performance APIs and microservices built for real production load 🔹 Error handling, logging and monitoring from day one 3. Frontend (React, Vue.js, Next.js, Nuxt.js, TypeScript) 🔹 Fast, responsive dashboards and admin panels 🔹 Component architecture that stays maintainable as the product grows 4. Database Architecture (PostgreSQL, MySQL, MongoDB) 🔹 Schema design, query optimization and indexing that scale 🔹 Data decisions that don't turn into technical debt 5. Cloud & DevOps (AWS, Docker, CI/CD) 🔹 Containerized, monitored deployments with automated pipelines 6. System Design & Architecture 🔹 I turn product requirements into a technical plan and make the trade-offs early, so you don't pay for them later HOW I WORK I think about the whole system: how the frontend talks to the backend, how data flows, how it scales, and how your team will maintain it. I've built systems from zero that now run in production, and I've stabilized systems that were breaking. I write documentation and keep you updated without you having to chase me. If you need a full-stack engineer to architect your SaaS, stabilize production, or rebuild for reliability, send me a message. The best way to start is a short chat about what you're building.