ppFliff unpacks sports gaming into social, free‑to‑play games for all types of sports fans. We've built a social sports gaming experience that allows users to compete for leaderboard positioning, to achieve badges and build their status within the game. /p pWe are pioneering play‑for‑fun sports gaming, with our flagship social sportsbook experience that includes sweepstakes promotions and loyalty rewards. We provide sports fans with fun, engaging, and free‑to‑play alternatives to real money gaming. /p pWe 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 will work closely with our team in Sofia, Bulgaria, and requires comfort collaborating and operating in EEST (Eastern European Time). /p h3What You’ll Do /h3 ul liTake full ownership of backend services from design through deployment, maintenance, and continuous improvement /li liDesign, develop, and maintain scalable, high‑performance distributed backend services using Python and Django /li liArchitect distributed systems to support millions of users with low latency and high availability /li liCollaborate with product, frontend, and DevOps teams to ship reliable features on aggressive timelines /li liLead and mentor junior engineers through code reviews, architectural discussions, and knowledge sharing /li liOwn critical backend infrastructure components: APIs, data pipelines, message brokers (Kafka), caching /li liOptimize systems for throughput, latency, fault tolerance, and resilience under heavy load /li liImplement robust testing strategies: unit, integration, and performance tests /li liDrive continuous improvement of development processes and system observability (monitoring, logging)



/li liParticipate in on‑call rotations and support production issues as needed /li /ul h3What We’re Looking For /h3 ul li5+ years of professional Python backend development experience with a proven track record of ownership and successful delivery /li liSolid Django experience (not necessarily expert level), with asynchronous programming skills (asyncio) /li liProduction experience with Apache Kafka /li liStrong experience with distributed systems (microservices or similar architecture) /li liExperience deploying and managing containerized applications (Docker); Kubernetes experience is a plus /li liFamiliarity with any cloud provider (AWS preferred) /li liProficient with SQL databases, especially PostgreSQL; NoSQL is a plus /li liExperience with CI/CD pipelines and test automation /li liKnowledge of monitoring and logging tools (Prometheus, Grafana, or equivalent) /li liStrong problem‑solving skills and comfort doing code reviews /li liPrior experience working with systems supporting 1M+ users is a strong plus /li liComfortable working in Agile teams /li liStrong sense of responsibility and commitment to shipping high‑quality software /li liWillingness to participate in on‑call rotations /li /ul h3Nice to Have /h3 ul liExposure to event sourcing or CQRS patterns /li liFamiliarity with frontend technologies (React) /li liKnowledge of big data tools (Flink, NiFi) /li liExposure to infrastructure as code tools like Terraform /li liPractical knowledge of containerization and orchestration tools like Docker and Kubernetes /li liExperience in sports/betting industries /li /ul h3Benefits /h3 ul liFully remote work environment. /li liProfessional development opportunities in a dynamic, integral setting. /li liA supportive, collaborative, and knowledge‑driven workplace. /li liAn engaging and challenging role with the freedom to innovate and develop effective solutions.



/li /ul pWe 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. /p h3Welcoming and Friendly /h3 pWe 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. /p h3Lively and Creative /h3 pWe 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. /p h3Stimulating and Rewarding /h3 pWe 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. /p h3Equal Employment Opportunity Statement /h3 pFliff 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. /p h3Join Our Team! /h3 pIf 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. /p h3IMPORTANT NOTICE: /h3 pThe 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 ( Please be cautious of communications and links that come from non‑company email addresses (@getfliff.com), social media messaging platforms or unsolicited phone calls. /p /p #J-18808-Ljbffr

📌 Senior Python Engineer (Contract) (Barcelona)
🏢 Fliff
📍 Barcelona