Senior Python Engineer, Wallet

Fliff 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.

We 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.

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

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

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:

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.

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.

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.