Backend Developer (Node.js)

Your Mission:

As a Backend Developer, you will translate user and business needs into robust backend solutions for our HR product, KiwiHR. Your skills will help the team make informed decisions about backend technologies and practices. You will share your knowledge with colleagues, contribute to code reviews, and ensure that we maintain high engineering standards and code quality. Your mission extends beyond coding. You will collaborate with cross-functional teams to define, design, and implement new features. You will also work closely with frontend developers and other team members to ensure the seamless integration and functionality of the system.

About the team:

KiwiHR product team is a team of 20+ people, organized into multiple smaller teams, each made up of 4-5 individuals. Our particular sub-team is a vibrant mix of two Backend Developers and three Frontend Developers, bolstered by the support of Design, QA and DevOps teams. Despite our remote operations and flexible working hours, we maintain a high degree of collaboration and close-knit interaction within our team. We enjoy a camaraderie that extends beyond work, fostering a lively and enjoyable team atmosphere.

Your 12-month journey:

During the first 3 months: You will meet the team, learn about the product and the way we work. You will start to understand how the application works under the hood and what direction it is heading. You will have a bunch of small features implemented and being used by our customers on production.

Within 6 months: You will be prepared to work mainly on your own and will know what’s coming up next. You will be responsible for implementing more complex features and contributing to technical documentation. You will have a deep understanding of what we do and why we do it.

After 1 year: There will be parts of the application you know about better than anybody else. On a daily basis you will be using features that you implemented or extended. You will continue to develop new modules and help us plan ahead. There will be changes in the tools, codebase and processes that you suggested and the team has agreed to implement.

What you’ll be doing:

• Assisting in development of the Core modules of KiwiHR
• Helping to maintain and extend existing modules and to develop new ones
• Collaborating with other Developers and QAs and Designers to deliver high-quality solutions
• Ensuring the quality, stability, and maintainability of the code base
• Proposing innovative solutions to encountered challenges
• Identifying root causes of performance bottlenecks or bugs and fixing them
• Participating in code reviews and preparing technical documentation

What you’ll bring to the team:

• Proficiency in modern JavaScript and TypeScript
• Minimum 2 years of commercial experience in backend development on Node.js platform
• Proven experience working with:
• Express.js or similar frameworks
• Relational databases (PostgreSQL, MySQL, Oracle)
• ORM libraries (Sequelize, TypeORM or similar)
• Testing frameworks (Mocha, Jest)
• GraphQL APIs
• Git
• Understanding of asynchronous programming
• Excellent collaboration and communication skills in Polish and English
• Problem-solving mindset

What we offer:

• Great offices and locations in Poznań, Wroclaw and Krakow OR the possibility to work fully remotely from Poland
• Working within an international, friendly team that truly values your contribution
• Brilliant culture and informal, come-as-you-are dress code
• For B2B contract salary in the range of: 15,000-20,000 PLN + VAT and 30 paid break days (
• Employee contract option is available too (26 holiday days)
• €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)