Senior Dotnet Developer

Papaya is launching a new game-changing initiative, and we're looking for a passionate and driven Backend Engineer to join our core team. This role offers a unique opportunity to shape and influence the early stages of an exciting B2C product. As the second developer in a small, agile startup, you'll play a pivotal role in designing and building the backend platform, tackling challenges that push the boundaries of technology across multiple domains.

Our product is a vibrant, gamified social platform that lets users compete in mini-games, post relevant content, and engage with others in a competitive, social ecosystem. You'll be working on backend systems supporting the social network and economy features, as well as developing and enhancing our recommender system and video processing capabilities.

You'll be using technologies such as .NET Core, AWS, Kubernetes, and Docker. This is the perfect role for a big thinker and problem solver who thrives in a startup environment and is passionate about building innovative products.

Responsibilities

• Design and build scalable backend systems using
  .NET Core
   and 
  AWS
  .
• Work on a variety of domains: backend services, cloud architecture, infrastructure, and the recommender system.
• Develop microservices and manage the entire lifecycle from development to production.
• Implement and maintain DevOps best practices using Docker, 
  Kubernetes
  , CI/CD pipelines.
• Collaborate with cross-functional teams to ensure robust monitoring and debugging of services, both locally and remotely.
• Continuously experiment with new technologies and tools to improve system performance and scalability.
• Solve complex problems with a focus on high availability, reliability, and maintainability.

Requirements

• 4+ years of experience in backend development, preferably with .NET Core (open to other languages with a fast learning curve).
• Strong understanding of computer science principles (data structures, algorithms, system design).
• Experience with cloud platforms (AWS, GCP, etc.).
• Solid background in microservices architecture and distributed systems.
• Experience working with Docker, Kubernetes, and CI/CD tools.
• Familiarity with either SQL or NoSQL databases, and experience in database design and optimization.
• Experience with debugging, logging, and monitoring for microservices systems.
• Passion for working in a startup environment and embracing new technologies.
• Ability to work on multiple areas including backend, infrastructure, and advanced features (e.g., recommender systems, video processing).

Nice-to-Have:

• Experience with social platforms, gaming systems, or B2C products.
• Background in recommendation algorithms.
• Understanding of startup dynamics and ability to contribute to a fast-paced, evolving product.

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