Senior Full-Stack Developer

Quick Facts

• Role: Senior Full-Stack Developer

• Focus: Node.js backend, React/Next.js frontend, occasional smart contract contributions

• Work setup: 100% onsite near Metro Plac Wilsona, Warsaw

• Compensation: B2B/Freelance; 120–180 PLN/h

Description

You will build end-to-end applications combining fintech-grade reliability with Web3 innovation. The role is centered on backend work with Node.js (NestJS/Express), frontend development with React/Next.js and TypeScript, and occasional smart contract development (EVM/SVM).

Responsibilities

• Develop backend services with Node.js (NestJS/Express)

• Build frontend apps with React/Next.js + TypeScript

• Work with 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 and NestJS

• At least 5 years of experience in backend applications

• At least 2 years of experience maintaining production applications

• Strong frontend skills in React + TypeScript

• Database and API integration knowledge

• Occasional smart contract contribution experience/knowledge (EVM/SVM)

• English at least B2

• Ability to mentor mid/junior developers

• Ability to work 100% onsite from the office near Metro Plac Wilsona, Warsaw

Benefits

• Senior rate (B2B/Freelance): 120–180 PLN/h

• Fast hiring decision if it’s a match

• Recruitment typically takes 2–3 weeks, with feedback after each stage within a few days