Software Engineer Team Lead (React + Node.js)

💰 Salary: 29,500–33,200 PLN/month 🌎 Hybrid from Warsaw, Poland 🕦 Full-time position, long-term ☑️ Contract of Employment We are looking for a Team Lead Software Engineer to join our client, a technology company that builds AI-powered platforms and consulting solutions for enterprise operations, with a strong focus on the private capital sector. The company has over ten years of experience working with high-growth and PE-backed businesses, combining deep domain expertise with advanced technology to drive measurable results. In this role, the focus will be on leading a team of developers across front-end and back-end development, owning architectural decisions, and contributing directly to the codebase. You will mentor engineers and drive the delivery of high-performance web applications using React and Node.js. Requirements • 7+ years of full-stack development experience with React.js and Node.js in production environments • 2+ years in a team lead, tech lead, or senior engineering leadership role • Strong command of the React ecosystem: Redux, React Hooks, component architecture, and performance optimization • Solid HTML5, CSS3, and modern JavaScript (ES6+); experience with build tooling such as Webpack, Vite, or Babel • Proficiency with Express.js and API design (RESTful; GraphQL is a plus) • Working knowledge of auth patterns: OAuth, JWT, session-based authentication • Hands-on experience with PostgreSQL or MySQL; familiarity with MongoDB or similar NoSQL databases • Docker experience required; Kubernetes is a plus • Familiarity with at least one major cloud platform (AWS preferred) • Comfortable with Git workflows and Agile/Scrum delivery Responsibilities • Lead and mentor a team of software engineers; run code reviews, set engineering standards, and hold the bar on quality • Architect and build full-stack features using React.js (with Redux and Hooks) on the front end and Node.js / Express.js on the back end • Design scalable microservices and RESTful (or GraphQL) APIs aligned with product requirements • Own the testing strategy: define coverage expectations, enforce unit and integration testing, and integrate quality gates into CI/CD pipelines • Manage containerized deployments via Docker; collaborate on infrastructure with cloud platforms (AWS, Azure, or GCP) • Partner directly with Product and Design to translate requirements into production-grade, accessible interfaces • Model and maintain SQL and NoSQL data schemas; own data interaction patterns across services • Monitor production systems, triage incidents, and drive root-cause resolution • Keep technical documentation accurate and up to date Get to know DevsData We are a technology consulting company and a recruitment agency, delivering software solutions to clients from Europe and the US. We work 100% remotely, in an international team. We employ people with experience in international corporations as well as the ones from the best technical and business universities. Find out more: https://devsdata.com