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. 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 FriendlyWe 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 CreativeWe 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 RewardingWe 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 StatementFliff 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.

5+ years Python backend experience building scalable services; Django and asyncio experience; PostgreSQL and Redis proficiency; strong algorithms, concurrency, and system design skills; willing to join on-call rotation.

Key Responsibilities

• designing services
• developing services
• supporting production

Skills & Tools

Python, Django, asyncio, PostgreSQL, Redis, Go, Apache Kafka

Job Details

• Category: Software Development
• Seniority: Senior Level
• Commitment: Contract
• Workplace: Remote — Limassol, Limassol, Cyprus
• Languages: English

About Fliff

A sports gaming company building social, free-to-play sportsbook experiences. — Industry: Information Technology