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Backend Engineer (NodeJs, Python)

Wiraa

$225,000 - $300,000
Sep 29, 2025
Remote, US
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Sleeper is looking to scale its core backend systems to support millions of sports fans and enhance user experience through seamless real-time interactions, secure payments, and personalized content.

Requirements

  • 7+ years of backend software engineering experience, including leadership roles such as staff engineer or technical lead
  • Proven track record of designing and scaling distributed systems serving millions of users in real-time or gaming environments
  • Strong proficiency in one or more backend languages such as Go, Python, Node.js, or Java
  • Deep understanding of database technologies (SQL and NoSQL), caching strategies, and message queues like Kafka, RabbitMQ, or Pub/Sub
  • Experience designing and maintaining RESTful and/or GraphQL APIs, data models, and internal tooling
  • Hands-on experience with cloud platforms such as AWS, GCP, or similar, and familiarity with containers (Docker) and orchestration tools (Kubernetes is a plus)

Responsibilities

  • Design and develop core backend systems that support Sleeper’s games, including fantasy contests, user profiles, leaderboards, and real-time features
  • Architect scalable, distributed systems capable of handling millions of concurrent users with low latency and high availability
  • Lead end-to-end backend initiatives from concept through deployment, ensuring clean interfaces, comprehensive documentation, and resilient infrastructure
  • Optimize system performance by monitoring, profiling, and capacity planning to proactively address bottlenecks
  • Collaborate effectively with cross-functional teams including product, design, and frontend engineering to deliver compelling features
  • Mentor and review code for engineering team members, fostering a culture of excellence and continuous improvement
  • Drive technical innovation, establish best practices, and contribute to the overall technical direction of the backend stack

Other

  • Excellent communication and collaboration skills, with a strong product mindset
  • Ability to mentor team members and promote engineering best practices
  • Bonus: Passion for sports, gaming, or experience building multiplayer or real-time systems
  • Preference for candidates located in the SF Bay Area, Los Angeles, NYC, or the Pacific Northwest.