Senior Python Engineer, Wallet

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.

About The Role

We’re looking for a Senior Python Engineer to join our Wallet team, which owns critical services in our product. The team is responsible for players’ wallets, bet placement, settlements, deposits and withdrawals, and other critical backend services. We’re looking for engineers with strong backend fundamentals and experience building reliable, high-load systems with complex business logic. 

What You’ll Do

Take full ownership of backend features and improvements, from design through implementation, deployment, and production support
Design, develop, and maintain scalable, high-performance backend services using Python and Django, including asynchronous components where applicable
Write unit and integration tests to ensure system reliability, prevent regressions, and improve overall test coverage and testing practices
Estimate software development effort for features and long-term technical initiatives
Collaborate with product, QA, and engineering teams to turn requirements into well-defined technical solutions
Participate in code reviews, help raise engineering quality, and contribute to technical decisions

What We're Looking For

At least 5+ years of development experience, with Python as the primary language
Strong experience building production backend systems with Django and asynchronous python (asyncio)
Strong fundamentals in algorithms, data structures and concurrency
Experience in architecture design of highly loaded and scalable solutions
Hands-on experience with relational databases (PostgreSQL), including writing complex SQL queries, schema design, migrations, performance tuning
Experience with Redis for caching and state management in distributed systems
Strong understanding of the development cycle from requirements analysis and deployment to application monitoring
Willingness to participate in on-call rotations

Nice To Have

Experience with Go
Production experience with Apache Kafka
Prior experience working with systems supporting 1M+ users
Experience in writing automated tests, measuring test coverage, and defining test automation strategies
Experience in sports/betting industries

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.