Senior Software Engineer

At FanDuel, we don't just write code — we engineer the pulse of sport. Every NFL touchdown, NBA buzzer-beater, and MLB walk-off home run is backed by the platforms our teams build, scale, and evolve in real time. Millions of fans engage with our products every single day — and you'll help make that experience faster, smarter, and more thrilling.

We're part of the FanDuel Group, the premier mobile gaming company in North America and a proud member of Flutter Entertainment — the world's largest sports betting and gaming operator. From Melbourne to New York, Edinburgh to Dublin, our engineers collaborate across continents to craft experiences that connect sports fans everywhere.

Now, we're looking for a Senior Software Engineer (.NET) to join our Sportsbook engineering group — a team of curious, pragmatic builders shaping the future of sports technology.

Our Commitment

We're proud to lead the way in Responsible Gambling, setting global standards for player wellbeing and trust.

And we're equally proud to build an environment where everyone can thrive — across borders, backgrounds, and life stages.

If you need adjustments during the recruitment process or flexibility in how you work, we've got you covered.

What you'll be doing

You'll design, build, and scale the distributed systems that power our global sportsbook — the real-time engine behind thousands of live betting markets across the NFL, NBA, MLB, and beyond.

You'll:

• Design, build, and optimise cloud-based services using .NET Core and C#
• Build event-driven architectures leveraging Kafka, RabbitMQ, or AWS EventBridge
• Implement distributed caching with tools like Redis or Memcached
• Champion CI/CD and continuous delivery using Buildkite, GitHub Actions, Octopus, or Jenkins
• Develop scalable and self-healing infrastructure using Kubernetes and Terraform
• Collaborate with global teams to deliver high-throughput, mission-critical systems
• Write high-quality, testable code using TDD, BDD, and modern mocking frameworks
• Optimise for multi-threading and low-latency performance
• Contribute to architecture, mentor peers, and push boundaries on what's possible in real-time systems

What we're looking for

You're an engineer who loves building for scale — someone who finds beauty in efficient systems and thrives in complex, distributed environments.

You'll bring:

• .NET Core and C# expertise with IoC/DI
• Experience with unit testing and mocking frameworks (nunit, Moq, NSubstitute, etc.)
• Background in event-driven architecture, messaging, and event bus platforms
• Exposure to high-traffic, high-throughput, and mission-critical systems
• Strong understanding of multi-threading, low-latency, and performance tuning
• Proficiency in CI/CD and cloud-native infrastructure (AWS preferred)
• Experience in building scalable, self-healing systems in the cloud
• Familiarity with React (desirable)
• Previous experience in the wagering industry (desirable, but not essential)

Why FanDuel?

This is where sports and software collide. You'll be solving real-world problems at the intersection of scale, data, and entertainment — working on systems that keep pace with live games, dynamic odds, and millions of passionate users.

You'll get:

• 25 days annual leave (five full weeks to recharge)
• $1050 work-from-home allowance
• Tailored career development programs and leadership pathways
• Global exposure — work with engineers from New York to Glasgow
• AWS certifications, hack days, and innovation sprints
• Internal Women in Tech community and DEIB networks
• Free meals, onsite concierge, and social events that actually bring people together
• Generous parental leave and Circle In membership for family support
• True flexibility to work how and where you do your best work

Ready to lead and build something fans can feel — worldwide?

If you love clean code, bold ideas, and a culture that values curiosity, fun, and collaboration — this is where you'll do your best work.

Apply now and help us build what's next.