Senior Software Engineer

As a Senior Software Engineer within FanDuel's Risk and Trading Technology team, the role sits in a cross-functional agile team that directly impacts the business. The engineer works collaboratively to implement creative, high-quality solutions, scope effort and timelines, and balance stakeholder and engineering priorities, taking ownership of every part of the software delivery lifecycle. The role works directly with quantitative analysts to improve market making capabilities, acting as a domain expert on strategy implementation (quoting and decision logic) and how it fits into the wider Risk and Trading landscape, including real-time risk controls, execution outcomes, and performance measurement.

• Work collaboratively within a cross-functional agile team to implement creative, high-quality solutions, scope effort and timelines, and balance stakeholder and engineering priorities.
• Own every part of the software delivery lifecycle, including testing, deploying, monitoring, and maintaining software.
• Work directly with quantitative analysts to improve market making capabilities, acting as a domain expert on strategy implementation (quoting and decision logic) and its place in the wider Risk and Trading landscape.
• Build and evolve components that support real-time quoting and decisioning, with careful attention to latency, throughput, and correctness.
• Implement and maintain risk controls and guardrails such as exposure checks, limits, throttling and filters, and kill switch patterns.
• Ensure high-quality decision logging so strategies can be debugged, replayed, and improved using real quote and fill outcomes.
• Partner with quants and stakeholders to define and monitor key metrics such as quote ratio, win rate, expected versus realised margin, and exposure and capital utilisation, and identify opportunities to innovate in the quantitative space.
• Write simple, extendable code following standards and best practices, test it thoroughly, and limit the use of short-term workarounds.
• Participate in code review, design discussions, team planning, and ticket, metric, and COE reviews to help the team evolve.
• Classify, store, and handle data in accordance with FanDuel policies, and track, mitigate, or escalate security risks in a timely manner.
• Focus on operational excellence, resolve the root cause of complex problems, leave software better and easier to maintain than it was found, and take part in on-call rotation where required to provide excellent customer support.
• Mentor and develop others, pair program with more junior engineers, train new team-mates on how the team's software is constructed, operated, and secured and how it fits into the bigger picture, and help recruit and interview for the team.
• Estimate stories and tasks accurately, deliver them on time, and keep up to date with market standards and open-source frameworks.

• Degree in Computer Science, Data Science, Engineering, Mathematics, Physics, or a related discipline.
• Five or more years of industry experience in an Engineering field, Machine Learning, Data Science, Finance Engineering, or Statistics.
• Five or more years of software development experience.
• Experience in both quantitative modelling practices and coding, including assisting in the creation of models and strategies and working with other engineers to productionalise the software.
• Proficiency in building services with a modern object-oriented programming language.
• Understanding of performance, hardware, and lower-level memory management.
• A fundamental understanding of data structures and algorithms.
• Proficiency in working with GitOps patterns.
• Experience working with CI/CD pipeline tooling.
• Experience working with cloud-based infrastructure and technologies.
• Knowledge of AWS, including API gateway, workflow orchestration, lambda, and serverless applications.
• Experience interacting with and designing relational databases.
• Experience with streaming technologies.
• Ability to document code, research, and designs clearly.
• Proficiency in translating requirements into design and developing applications.

• Experience with C, C++, or Rust.
• Knowledge of BuildKite and GitHub Actions.
• Knowledge of infrastructure as code, notably Terraform and Helm.
• Experience with Kafka.
• Experience with Jira and Confluence.
• Experience building event-driven or real-time systems where observability (logs, metrics, traces) and safe rollout patterns are critical.
• Familiarity with concepts such as exposure, hedging, inventory and position, and performance measurement in decision systems.
• Experience with backtesting or simulation, replay tooling, or strategy evaluation workflows.

• Hybrid working arrangement.

• A range of health plans to choose from, some as low as $0 per paycheck, including programmes for fertility and family planning, mental health support, and fitness benefits.
• Generous paid time off (PTO and sick leave).
• Annual bonus and long-term incentive opportunities based on performance.
• 401k with up to a 5% match.
• Commuter benefits.
• Pet insurance.
• Medical, vision, and dental insurance; life insurance; and disability insurance.
• Eligibility for short-term or long-term incentive compensation, including cash bonuses and stock programme participation.
• Paid personal time off and 14 paid company holidays.
• Paid sick time in accordance with all applicable state and federal laws.
• Benefits differ across location, role, and level.

FanDuel Group is the premier mobile gaming company in the United States and Canada, with a portfolio of leading brands across mobile wagering including America's #1 Sportsbook, FanDuel Sportsbook; its iGaming platform, FanDuel Casino; FanDuel Racing; and its daily fantasy sports product. FanDuel Group is a subsidiary of Flutter Entertainment, the world's largest sports betting and gaming operator, traded on the New York Stock Exchange (NYSE: FLUT).