Senior Fullstack Developer

About BlockyDevs We build end-to-end applications combining fintech-grade reliability with Web3 innovation. Your Role As a Fullstack Developer, you’ll primarily work with Node.js on the backend, React on the frontend, and occasionally contribute to smart contract development. Responsibilities • Develop backend services with *Node.js (NestJS/Express)** • Build frontend apps with *React/Next.js + TypeScript** • Work with databases (PostgreSQL, MongoDB) and APIs • Occasionally contribute to smart contracts (EVM/SVM) • Collaborate with design, backend, and blockchain teams Requirements • Strong backend skills in Node.js/NestJS • At least 5 years of experience in backend applications • At least 2 years of experience in maintaining production applications • Solid frontend skills in React + TypeScript • Database and API integration knowledge • Experience mentoring mid/junior developers • English at least B2 level • Ability to work 100% onsite from our office near Metro Plac Wilsona, Warsaw Nice-to-have • Microservices and cloud deployment experience • Web3 integrations knowledge Rates (B2B/Freelance) • Senior: 120 - 180 PLN/h Recruitment Process 1. Intro Call (30 min) – Quick chat about your experience, expectations, and our projects. 2. Technical Interview / Task – Backend (Node.js) and frontend (React) focus, with some discussion of smart contracts. 3. Final Meeting – Culture/fit + project discussion. 4. Offer – Fast decision if it’s a match. 5. Process usually takes 2–3 weeks. 6. Feedback after each stage within a few days