Senior Backend Engineer nodejs

As a Senior Backend Engineer , you'll contribute to building reliable, scalable solutions for our product, Tellent HR . You will shape technical architecture, make key decisions, and promote best engineering practices to ensure high-quality, maintainable code across the full stack. While your main focus will be on developing backend modules, you'll have the opportunity to influence frontend features and user experience, working closely with designers and frontend developers. You'll take ownership of critical components, guiding their evolution as the product scales. In addition, you'll mentor team members through code reviews and pair programming, support cross-functional collaboration, and help ensure smooth integration of new features. Your strategic technical input will align system design with business goals, while your hands-on approach will help drive the ongoing improvement of our platform. About the team The Tellent HR product team is part of the Tellent R&D team focusing on the Core HR organised into two dedicated teams. Our particular sub-team is a vibrant mix of Backend Developers, Frontend Developers, supported by Design, QA and DevOps teams. Even though we're fully remote and flexible, we stay closely connected and collaborate daily. We also believe in keeping the atmosphere light and fun. What you bring Expert skills in Node.js Strong skills in modern JavaScript and TypeScript. Full stack mindset - you're comfortable (or willing to get comfortable) working across the entire stack, from database queries to UI components. Product thinking - you don't just implement specs, you think about whether we're solving the right problem. You're pragmatic and able to evaluate and make tradeoffs when necessary. Comfortable with experimentation and prototyping. Hands-on experience with: Express.js or similar backend frameworks. React or other frontend libraries Relational databases like PostgreSQL, MySQL, or Oracle. Writing and running tests with Mocha, Jest, or similar frameworks. Working with GraphQL APIs. Git for version control. Excellent communication skills in Polish and good command (> B2) of English Why Tellent Working within an international, friendly team that truly values your contribution Brilliant culture and informal, come-as-you-are dress code Salary in the range of: For B2B: 20.000 - 28.000 PLN VAT and 30 paid break days For an employee contract: 16.600 PLN - 23.200 PLN and 26 paid holiday days on employee contract 2 wellbeing days each year €1000 of training budget per year to keep you sharp and in tune with trends €500 travel budget to visit your colleagues in Amsterdam €200 home office budget work from home allowance Work from anywhere for 4 weeks/year MacBook displays, alongside all the tools you need to succeed Travel reimbursement and wellness perks Fitness card (Multisport) Private health care (LuxMed) About Tellent Tellent is a leading Talent Management Suite designed to empower HR & People teams across the entire employee journey. Our all-in-one platform combines an Applicant Tracking System (Tellent Recruitee), intuitive HRIS (Tellent HR) and powerful Performance Management Software (Tellent Grow) to streamline every stage of the talent lifecycle. With a team of 250 talented professionals across global hubs, we support 7,000 organizations in 100 countries — helping them attract, grow and retain top talent. Backed by a thriving ecosystem of 500 partners, we're united by one shared mission: to equip People leaders everywhere with the tools they need to make better people decisions today.