Senior Python Engineer (Contract)

Fliff is a multinational company pioneering play-for-fun sports gaming with a flagship social sportsbook experience that includes sweepstakes promotions and loyalty rewards. The company offers social, free-to-play games for sports fans, allowing users to compete for leaderboard positioning, achieve badges, and build their status within the game.

• 5+ years of professional Python backend development experience with a proven track record of ownership and successful delivery
• Solid Django experience, 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

• 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

This role requires full working-hour alignment with Central European Time (CET ±2 hours) to enable daily, real-time collaboration with the Sofia-based team. Only candidates located within this time zone range will be considered. Applicants outside CET ±2 hours will not be considered.

Fliff is an equal-opportunity employer committed to creating an inclusive environment for all employees. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.

IMPORTANT NOTICE: Fliff will never ask for payment or personal financial information during the application process. Please be cautious of communications and links from non-company email addresses, social media messaging platforms, or unsolicited phone calls.