Senior Python Engineer

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
We are a multinational company with our headquarters based in Philadelphia, and offices in New York, Austin, and Sofia, Bulgaria. Wherever we are in the world, we pride ourselves on being a close-knit, focused team that is welcoming and friendly, and the work that we do is always interesting and rewarding. Wherever we are in the world, we pride ourselves on being a close-knit, focused team that is:
Welcoming and Friendly
We want to reflect the diversity of the cities we serve. By creating an inclusive culture where everyone can thrive, we’ll make Fliff better for employees and customers alike.
Lively and Creative
We respect and value each other’s ideas, experience and expertise. There is no such thing as a bad idea; only ideas that are executed and ideas that are discarded after consideration.
Stimulating and Rewarding
We know bright minds love a challenge, and we understand your desire to see your hard work pay off. We’ll make sure your daily tasks align with your career ambitions as we grow together.
Equal Employment Opportunity Statement
Fliff is an equal-opportunity employer. We celebrate diversity and are 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.
Join Our Team!
If you're ready to be part of an exciting, innovative, and dynamic team, apply now to help shape the future of sports gaming with Fliff.
IMPORTANT NOTICE: The privacy and security of applicant information is paramount and we take fraud attempts very seriously. Please note that Fliff will never ask for payment or personal financial information during the application process. All of our legitimate job opportunities can be found on our official career site (https://www.getfliff.com/careers). Please be cautious of communications and links that come from non-company email addresses (@getfliff.com), social media messaging platforms or unsolicited phone calls.

Work arrangement
Yes