Senior Python Engineer

Job description

Fliff is the arena for high-upside play. We are dismantling the paywalls of legacy sportsbooks and reimagining the economics of social games to pioneer the next generation of rewards-driven entertainment spanning sports, casino, predictions, collectibles, and beyond. Powered by a frictionless freemium architecture, Fliff democratizes access and gives millions of players nationwide a real stake, real thrill, and real upside. By combining authentic competitive drive with instant rewards and interactive games, we are turning passive sports fans and casual gamers into active, empowered participants – unlocking the player in everyone. We are looking for a Senior Python Engineer to own, design, build, and maintain high-performance distributed backend systems serving millions of users. You will be accountable for end-to-end delivery of scalable, reliable, and low-latency solutions using Python, Django, and Kafka. This role requires full working-hour alignment with Central European Time (CET ±2 hours) to enable daily, real-time collaboration with our Sofia-based team. We are only considering candidates located within this time zone range. Applicants outside CET ±2 hours will not be considered. ### What You’ll Do - Take full ownership of backend services from design through deployment, maintenance, and continuous improvement - Design, develop, and maintain scalable, high-performance distributed backend services using Python and Django - Architect distributed systems to support millions of users with low latency and high availability - Collaborate with product, frontend, and DevOps teams to ship reliable features on aggressive timelines - Lead and mentor junior engineers through code reviews, architectural discussions, and knowledge sharing - Own critical backend infrastructure components: APIs, data pipelines, message brokers (Kafka), caching - Optimize systems for throughput, latency, fault tolerance, and resilience under heavy load - Implement robust testing strategies: unit, integration, and performance tests - Drive continuous improvement of development processes and system observability (monitoring, logging) - Participate in on-call rotations and support production issues as needed ### What We're Looking For: - 5+ years of professional Python backend development experience with a proven track record of ownership and successful delivery - Solid Django experience (not necessarily expert level), with asynchronous programming skills (asyncio) - Production experience with Apache Kafka - Strong experience with distributed systems (microservices or similar architecture) - Experience deploying and managing containerized applications (Docker); Kubernetes experience is a plus - Familiarity with any cloud provider (AWS preferred) - Proficient with SQL databases, especially PostgreSQL; NoSQL is a plus - Experience with CI/CD pipelines and test automation - Knowledge of monitoring and logging tools (Prometheus, Grafana, or equivalent) - Strong problem-solving skills and comfort doing code reviews - Prior experience working with systems supporting 1M+ users is a strong plus - Comfortable working in Agile teams - Strong sense of responsibility and commitment to shipping high-quality software - Willingness to participate in on-call rotations ### Nice to Have - Exposure to event sourcing or CQRS patterns - Familiarity with frontend technologies (React) - Knowledge of big data tools (Flink, NiFi) - Exposure to infrastructure as code tools like Terraform - Practical knowledge of containerization and orchestration tools like Docker and Kubernetes - Experience in sports/betting industries ### Benefits: - Fully remote work environment. - Professional development opportunities in a dynamic, global setting. - A supportive, collaborative, and knowledge-driven workplace. - An engaging and challenging role with the freedom to innovate and develop effective solutions.