Mid/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)

• Mid: 90 - 130 PLN/h

• 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