Senior Unity Developer (Infra team)

Papaya is seeking a sharp and passionate Senior Unity Developer to join their Infrastructure Team. The role involves building clean, scalable architecture for skill-based mobile games, collaborating with backend engineers, and ensuring high-quality, bug-free gameplay for millions of players. The developer will drive performance optimization, architect core frameworks, and contribute to a fast-growing, profitable company with a startup spirit, making a real impact on the product.

Must Have

• Build clean, scalable architecture for fast iteration and long-term performance.
• Collaborate with backend engineers to develop full-stack experiences with server communication.
• Ensure high-quality, bug-free gameplay for millions of new players.
• Participate in planning, design, and continuous improvement with a cross-functional team.
• Take full ownership and deliver features from A-Z.
• Work on long retention meta features.
• Optimize the game for the best performance on all supported devices.
• Drive performance optimization efforts, including profiling and identifying bottlenecks.
• Develop tools, automation, and internal utilities to improve developer workflows.
• Architect and maintain core frameworks (data pipelines, runtime systems, event handling, resource management, platform abstraction layers).
• Experience with CI/CD process, building Unity for Android and iOS, and Asset bundles.
• 5+ years of experience as a Unity Developer.
• Hands-on experience with profiling tools (Unity Profiler, RenderDoc, Instruments).
• Experience building or maintaining internal frameworks, SDKs, or reusable client-side modules.
• Experience developing and deploying on iOS and Android.
• Experience with API/REST communications.
• Deep knowledge of Unity engine internals (asset loading, memory management, rendering pipeline, scene management, multithreading, async tasks, asset bundle pipeline).

Perks & Benefits

• Join a profitable company with the heart of a startup.
• 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 necessary tools.
• Luxmed Medical services.
• Monthly 'Pyszne.pl' voucher.
• Multisport card.
• Monthly Happy Hours.
• Snacks and Breakfasts.

Description

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 are looking for a sharp and passionate Unity Developer to join our top-notch Infrastructure Team. Using your technical skills, your mission will be to tell the story behind the numbers, understand how players interact with our games, and leverage our data to propose new ideas that you’ll then see implemented.

We offer a hybrid work model with flexibility at our growing Warsaw

Responsibilities

• Build clean, scalable architecture to support fast iteration and long-term performance.
• Collaborate with backend engineers to develop full-stack experiences with server communication.
• Ensure high-quality, bug-free gameplay for millions of new players.
• Participate in planning, design, and continuous improvement alongside a cross-functional team.
• Full ownership and delivering features from a-z.
• Work on long retention meta features.
• Optimizing the game for the best performance on all supported devices.
• Make sure the games maintain excellent performance and a great user experience.
• Drive performance optimization efforts—profiling, identifying bottlenecks, and improving CPU/GPU
• Develop tools, automation, and internal utilities to improve developer workflows and efficiency.
• Architect and maintain core frameworks, including data pipelines, runtime systems, event handling, resource management, and platform abstraction layers.
• Have experience with CI/CD process, building Unity for Android and iOS, and Asset bundles.

Requirements

• 5+ years of experience working as a Unity Developer.
• Hands-on experience with profiling tools (Unity Profiler, RenderDoc, Instruments, etc.).
• Experience building or maintaining internal frameworks, SDKs, or reusable client-side modules.
• Experience developing and deploying on iOS and Android
• Experience with API/REST communications

Deep knowledge of Unity engine internals, including:

• Asset loading & memory management
• Rendering pipeline & optimization
• Scene management & runtime architecture
• Multithreading & async tasks
• Asset bundle pipeline

Benefits - what do 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 'Pyszne.pl' voucher
• Multisport card
• Monthly Happy Hours
• Snacks and Breakfasts