Senior Software Engineer

THE POSITION

Our roster has an opening with your name on it

As a Senior Software Engineer within FanDuel's Risk and Trading Technology team, you will be an essential part of a cross functional agile team that directly impacts our business. You will work collaboratively with a team to implement creative, high-quality solutions, scope effort and timelines, and balance priorities of our stakeholders and engineering needs. This team will work closely to deliver exceptionally high-quality software, while taking pride and ownership in testing, deploying, monitoring, and maintaining that software. Our engineers own every part of the software delivery lifecycle.

You will work directly with quantitative analysts at FanDuel to improve our market making capabilities. You will be a domain expert on strategy implementation (quoting/decision logic) and how that fits into the larger Risk and Trading landscape - including real-time risk controls, execution outcomes, and performance measurement. You will help ensure robust guardrails (limits, throttles, kill switch) and high-fidelity decision logging so strategies can be debugged, replayed, and improved (e.g., quote ratio, win rate, expected vs realized margin). You will go beyond the software developer role, and will be called upon to identify opportunities yourself in the quantitative space to innovate through technology.

THE GAME PLAN

Everyone on our team has a part to play

You are a significant and autonomous contributor. Your work is consistently of high quality. You solve difficult problems, applying appropriate technologies and best practices. You work with your team to invent, design and build software that is stable and performant. You are proficient in a broad range of design approaches and know when it is appropriate to use them and when it is not. Your solutions are pragmatic. You consider the legacy of the code you produce and write code that an SDE unfamiliar with the system can understand. You limit the use of short-term workarounds. You do things with the proper level of complexity the first time (or at least minimise incidental complexity). You create flexible software without over-engineering. You make appropriate trade-offs, re-use where possible, and are judicious about introducing dependencies. You are efficient with resource usage (e.g., system hardware, database, memory/CPU, etc).

We are looking for engineers to actively engage in technical discussions, assist in designing and implementing solutions, pair program with our more junior engineers, and deliver constant improvements to our systems. We want you to be excited about constantly learning and driving your professional development. You should have most, or all, of the following skills:

• Experience in both quantitative modeling practices and coding. You will be assisting in the creation of models/strategies and working with other engineers on your team to productionalize this software.

• You work in project ideas with stakeholders, and peers
• You own parts of product and technology & become subject matter experts
• You write simple and extendable code following standards and best practices. You test your code thoroughly
• You help balance customer requirements with the team requirements
• You help your team evolve by actively participating in the code review process, design discussions, team planning, and ticket/metric/COE reviews
• You classify, store, and handle data in accordance with FanDuel policies
• You track security risks and mitigate and/or escalate them in a timely manner
• You focus on operational excellence, constructively identifying problems and proposing solutions
• You take on projects and make software enhancements that improve the team software and processes
• You work to resolve the root cause of complex problems, leaving software better and easier to maintain than when you found it
• You are able to train new team-mates on how your team's software is constructed, how it operates, how secure it is, and how it fits into the bigger picture
• You foster a constructive dialogue and seek resolutions in a professional way
• You help recruit and interview for your team
• You estimate stories/tasks accurately and deliver them in time
• You mentor and help to develop others
• On-call rotation where required. You provide excellent customer support
• You keep yourself up to date with market standards, open-source frameworks
• You build and evolve components that support real-time quoting and decisioning with careful attention to latency, throughput, and correctness
• You implement and maintain risk controls and guardrails (e.g., exposure checks, limits, throttling/filters, kill switch patterns)
• You ensure high-quality decision logging so strategies can be debugged, replayed, and improved using real quote/fill outcomes
• You partner with quants and stakeholders to define and monitor key metrics (e.g., quote ratio, win rate, expected vs realized margin, exposure/capital utilization)

• Most importantly, you are; humble, pragmatic, self-managed, thirsty for knowledge, never satisfied and always challenging the norm. Responsible for the state of the code you both inherit and produce
• Creative problem-solving ability
• A passion for learning and always getting better

THE STATS

What we are looking for in our next teammate

• Degree in Computer Science, Data Science, Engineering, Mathematics, Physics, or related discipline.
• 5 or more years of industry experience in an Engineering field, Machine Learning, Data Science, Finance Engineering, or Statistics.
• 5 or more years of software development experience.
• Proficient in building services with a modern OOP language (C# experience is beneficial).
• Understanding of performance, hardware, and lower level memory management (C, C++, or Rust experience is beneficial).
• A fundamental understanding of data structures and algorithms.
• Proficient in working with GitOps Patterns
• Experience working with CI/CD pipeline tooling (BuildKite and GitHub Actions knowledge is beneficial).
• Experience working with cloud-based infrastructure and technologies.
• Knowledge of AWS with API gateway/workflow orchestration/lambda/serverless applications.
• Knowledge of infrastructure as code is nice to have, notably Terraform and Helm.
• Experience interacting and designing relational databases.
• Experience with streaming technologies (Kafka is nice to have).
• Ability to document code, research, and designs clearly (Jira and Confluence experience nice to have).
• Proficiency in translating requirements into design and developing applications.
• Understanding of containers (e.g. Docker), and orchestration (Kubernetes).
• Demonstrated abilities driving operational excellence and on call support.
• Experience with unit testing, testing tools, integrating testing and best-quality practices into an SDLC.
• Experience working in an Agile environment.

Nice to have (Trading Systems):

• Experience building event-driven / real-time systems where observability (logs/metrics/traces) and safe rollout patterns are critical
• Familiarity with concepts like exposure, hedging, inventory/position, and performance measurement in decision systems
• Experience with backtesting/simulation, replay tooling, or strategy evaluation workflow.

PLAYER BENEFITS
We treat our team right

We offer amazing benefits above and beyond the basics. We have an array of health plans to choose from (some as low as $0 per paycheck) that include programs for fertility and family planning, mental health support, and fitness benefits. We offer generous paid time off (PTO & sick leave), annual bonus and long-term incentive opportunities (based on performance), 401k with up to a 5% match, commuter benefits, pet insurance, and more - check out all our benefits here: FanDuel Total Rewards. *Benefits differ across location, role, and level.

The applicable salary range for this position is $149,000 - $186,000 USD, which is dependent on a variety of factors including relevant experience, location, business needs and market demand. This role may offer the following benefits: medical, vision, and dental insurance; life insurance; disability insurance; a 401(k) matching program; among other employee benefits. This role may also be eligible for short-term or long-term incentive compensation, including, but not limited to, cash bonuses and stock program participation. This role includes paid personal time off and 14 paid company holidays. FanDuel offers paid sick time in accordance with all applicable state and federal laws.

#LI-Hybrid