Senior Fullstack Developer

Established in 1997, Softeq was built from the ground up to specialize in new product development and R&D, tackling the most difficult problems in the tech sphere. Now we've expanded to offer early-stage innovation and ideation plus digital transformation business consulting. Our superpower is to deliver all of this under one roof on a global scale. So let's get started and build a better future together! We’re looking for a Senior Fullstack Developer (React, Node.js) to join our team and contribute to its continued growth. We are expecting to grow our team and begin new projects in the next 1-2 months. As such, we’re starting to accept resumes and process chosen candidates. Feel free to apply! Location and type of contract: Warsaw (Poland) - fully remote work (B2B contract); Vilnius (Lithuania) - hybrid/remote (B2B or employment contract). Responsibilities: Frontend (React): Build modern, responsive, and accessible UI components using React / Next.js; Implement clean, modular front-end architecture using hooks and component; libraries; Optimize rendering performance and frontend UX across devices; Collaborate with designers to turn UI/UX into functional interfaces. Backend (Node.js): Design and implement RESTful or GraphQL APIs using Node.js / Express / Nest.js; Build scalable microservices with proper separation of concerns; Work with relational and NoSQL databases (PostgreSQL, MongoDB, etc.); Implement authentication, authorization, and role-based access control; Integrate with third-party APIs and services (payments, notifications, etc.); Ensure robust error handling, logging, and testing. Requirements: 5+ years of experience in fullstack web development; Deep knowledge of JavaScript/TypeScript across both frontend and backend; Proficiency with React (or Next.js) and related frontend tooling (Webpack, Vite, etc.); Strong backend skills in Node.js and one or more frameworks (Express, Nest.js, etc.); Solid understanding of database design and query optimization (PostgreSQL, MySQL, MongoDB); Experience with API design, authentication flows, and JWT/OAuth2; Experience with Git, CI/CD, and automated testing; Strong architectural and problem-solving skills; Ability to communicate clearly, collaborate cross-functionally, and mentor others; Very good English language written and verbal communication skills. Nice to have: Experience with Cloud platforms (AWS, GCP, Azure); Experience with Docker, containerized deployments, or Kubernetes; Familiarity with serverless architecture (AWS Lambda, Firebase Functions); Exposure to microfrontend or monorepo setups (Turborepo, Nx); Familiarity with Agile processes, Jira, Scrum/Kanban boards. Softeq communicates only from @ softeq.com email addresses. We never request payments or fees for any reason during hiring — including trainings or courses to be completed, equipment, onboarding, or background checks — and we will not ask for banking information, cryptocurrency or gift cards. If you receive a message from any other domain or requesting payment, do not respond and report it to [email protected]