Backend Engineer

At Papaya, we believe in the power of play. We create skill-based mobile games that combine fun, competition, and real rewards — enjoyed by millions of players worldwide.

We're building a platform where players join tournaments, connect with others, and keep coming back. With a strong focus on innovation, scalability, and user experience, we aim to redefine what mobile gaming can offer.

We’re a fast-growing, profitable company with the spirit of a startup — no corporate bureaucracy, no endless layers of approvals. Everyone on the team makes a real impact on the product, and your voice truly matters.

We’re looking for a Backend Developer to join the team shaping the first 7-day experience of new players — a crucial journey in Papaya’s product.

You’ll play a key role in designing and delivering backend systems that power seamless, scalable experiences. As a technical leader within the team, you’ll own core architectural decisions, guide backend direction, and write production-ready code that supports millions of players.We offer a hybrid work model with flexibility at our growing Warsaw office.

Responsibilities:

• Design and implement backend features that support onboarding and early user engagement.
• Own the architecture and evolution of scalable, performant backend systems.
• Collaborate closely with Unity developers, product managers, and analysts to deliver full-stack experiences.
• Ensure system robustness, reliability, and maintainability in a high-traffic environment.
• Provide technical guidance to drive backend excellence across the team.
• Write high-quality and performant code following industry best practices and standards.
• Experiment with new technologies, tools, and 3rd party frameworks. Utilize them to deliver state-of-the-art tech.
• Mentor new members of the team.
• Tech stack: AWS, Kubernetes, NodeJs, Typescript, Redis, MySQL
• Supporting recruitment process.

Requirements;

• 6+ years of proven record in server applications design and development.
• Hands-on experience with cloud architecture.
• Proficient in a major development language.
• Passion for learning new technologies and applying them to make a difference.
• Strong understanding of system architecture, scalability, and performance optimization.
• Experience working in full-stack teams and integrating with game clients or frontend systems.
• Ability to write clean, maintainable, and well-documented code.

What We Offer:

• Join a profitable company with the heart of a startup – stable, growing, and full of energy.
• Enjoy a hybrid work model with flexibility and a growing Warsaw office.
• Receive competitive compensation tailored to the Polish market- B2B Service agreement
• Comfortable office in central Warsaw equipped with all the necessary tools to conquer the universe
• Luxmed Medical services
• Monthly 'Uber Eats' voucher
• Multisport card
• Monthly Happy Hours
• Snacks and Breakfasts