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Fliff logo

Principal Software Engineer

USA flag USA


Posted 5 days ago

Job Type

Full Time


$200k - $270k




  • Mission/Vision: Fliff is pioneering play-for-fun sports gaming, providing social, free-to-play alternatives to real money gaming for sports fans.

  • Key Responsibilities: Lead the design and development of complex, high-performance distributed systems using Go, architect scalable solutions, and drive best practices for code quality and efficiency.

  • Growth Opportunities: Provide technical guidance and mentorship to junior and mid-level engineers, fostering a culture of continuous learning and growth in a dynamic, global setting.


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.

Who We Are Looking For

If you are passionate about technology and thrive in a dynamic environment, we want you on our team! Fliff seeks a highly skilled Principal Software Engineer to join our growing team. As a key technical leader, you will drive innovation, set technical direction, and mentor our engineering team. You’ll be part of a cross-functional team responsible for the full software development life cycle, from conception to deployment.

The Role

  • Lead the design, development, and maintenance of complex, high-performance distributed systems using Go

  • Collaborate with cross-functional teams to define technical architecture, design scalable solutions, and deliver high-quality features

  • Architect and implement innovative solutions to handle large volumes of traffic and data, ensuring maximum performance, scalability, and reliability

  • Drive best practices for code quality, maintainability, and efficiency, setting standards for the engineering team

  • Develop and maintain unit, integration, and end-to-end tests to ensure software quality and reliability at scale

  • Provide technical guidance and mentorship to junior and mid-level engineers, fostering a culture of continuous learning and growth

  • Actively participate in code reviews, providing constructive feedback and promoting knowledge sharing across the team

Experience Required

  • 10+ years of overall software development experience, with a proven track record of designing and delivering complex distributed systems and scalable solutions

  • Extensive experience with distributed systems architecture, microservices, and cloud-native technologies

  • Deep understanding of data structures, algorithms, and software design principles, with a focus on performance optimization and best practices

  • Expertise in Go or similar backend languages, with a strong foundation in software engineering principles and patterns

  • Hands-on experience with Apache Kafka in production environments, including design, implementation, and optimization for real-time data processing

  • Proficiency in cloud platforms such as AWS with experience deploying and managing production workloads at scale

  • Excellent communication and collaboration skills, with the ability to articulate complex technical concepts to both technical and non-technical stakeholders

  • Proven leadership skills, with experience leading technical initiatives, mentoring engineers, and driving technical excellence within engineering teams


  • Competitive compensation package, which includes base salary, benefits, and equity. The annual salary for this role ranges from $200,000.00 to $270,000.00

  • Opportunity for professional development in a dynamic, global setting

  • Supportive, collaborative, and knowledge-driven workplace

  • Engaging and challenging role with the freedom to innovate and develop effective software 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.


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