The Position

We're looking for a Software Engineer (React Native) to join our Sportsbook engineering team. You'll be working on foundational engineering, focusing on improving the underlying frameworks, tooling, and performance that enable FanDuel to deliver an exciting and innovative customer experience.

Working with our React Native Sportsbook application, you'll contribute to app performance improvements and help enhance our core codebase to improve quality, scalability, and developer experience.

We're looking for engineers who are collaborative, curious, and committed to developing their skills. The ideal candidate has practical experience with React Native and an interest in mobile performance, tooling, and best practices. Exposure to native Android or iOS development is a plus. As a member of this team, you will contribute to the foundations of our mobile platform, helping FanDuel engineers deliver features more effectively while maintaining platform quality and engineering best practices.

We are a growth company, so there are plenty of opportunities for you to learn & grow with us.

Some of your responsibilities will include:

• Contributing to the core React Native codebase that underpins our Sportsbook application
• Working on app launch performance and broader performance improvements
• Building and maintaining frameworks, tooling, and shared components to support feature teams
• Collaborating with engineers across domains to solve cross-cutting technical challenges
• Implementing pragmatic solutions that balance performance, maintainability, and scalability
• Participate in code reviews, share knowledge, and contribute to continuous improvement initiatives
• Joining our on-call rota, sharing out of hours support duties as part of our incident response process

What We're Looking For

• 2–3 years of experience building mobile applications
• Strong practical experience with React Native
• Interest in performance optimization, tooling, and frameworks as well as app features
• Native Android (Kotlin/Java) or iOS (Swift) experience is a plus
• Familiarity with mobile app development best practices and testing approaches
• Exposure to Agile development and collaborative team environments
• Strong problem-solving skills with the ability to evaluate technical trade-offs with guidance
  
  

Additionally, our Engineers are able to:

• Contribute to technical discussions and share ideas to improve platform quality and developer experience
• Take ownership of tasks and deliver features from implementation through to release with support from senior team members
• Seek out opportunities to learn, grow, and expand technical expertise
• Participate in engineering community initiatives and adopt best practices across the organization

PLAYER BENEFITS
We treat our team right
 
From our many opportunities for professional development to our generous insurance and paid leave policies, we’re committed to making sure our employees get as much out of FanDuel as we ask them to give. Competitive compensation is just the beginning. As part of our team, you can expect:

• An exciting and fun environment committed to driving real growth
• Opportunities to build really cool products that fans love
• Career and professional development resources to help you refine your game plan for owning and driving your career and development
• Be well, save well and live well - with FanDuel Total Rewards your benefits are one highlight reel after another

ABOUT FANDUEL

FanDuel Group is the premier mobile gaming company in the United States and Canada. FanDuel Group consists of a portfolio of leading brands across mobile wagering including: America’s #1 Sportsbook, FanDuel Sportsbook; its leading iGaming platform, FanDuel Casino; the industry’s unquestioned leader in horse racing and advance-deposit wagering, FanDuel Racing; and its daily fantasy sports product.  

In addition, FanDuel Group operates FanDuel TV, its broadly distributed linear cable television network and FanDuel TV+, its leading direct-to-consumer OTT platform. FanDuel Group has a presence across all 50 states, Canada, and Puerto Rico.

The company is based in New York with US offices in Los Angeles, Atlanta, and Jersey City, as well as global offices in Canada and Scotland. The company’s affiliates have offices worldwide, including in Ireland, Portugal, Romania, and Australia.

FanDuel Group is a subsidiary of Flutter Entertainment, the world's largest sports betting and gaming operator with a portfolio of globally recognized brands and traded on the New York Stock Exchange (NYSE: FLUT).

Diversity, Equity and Inclusion

FanDuel is an equal opportunities employer. Diversity and inclusion in FanDuel means that we respect and value everyone as individuals. We don't tolerate bias, judgement or harassment. Our focus is on developing employees so that they reach their full potential.

FanDuel is committed to providing reasonable accommodations for qualified individuals with disabilities. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please email Benefits@fanduel.com.

The requirements listed in our job descriptions are guidelines, not hard and fast rules. You don’t have to satisfy every requirement or meet every qualification listed. If your skills are transferable and you are in the ballpark experience-wise, we'd love to speak to you!

THE POSITION

We're looking for a Senior Software Engineer to join our Sportsbook Core Apps engineering team. You'll be working on foundational engineering, focusing on improving the underlying frameworks, tooling, and performance that enable FanDuel to deliver an exciting and innovative customer experience.

Working with our React Native Sportsbook application, you'll enhance the core React Native platform and shared codebase to improve performance, scalability, reliability, and developer experience. You'll collaborate closely with engineers across the org to ensure the React Native stack integrates cleanly with native layers and enables feature teams to deliver safely and quickly.

We're looking for skilled engineers who are empathetic communicators with a commitment to continuous improvement and engineering excellence. The ideal candidate has significant experience delivering production React Native applications, can propose pragmatic solutions to performance and platform challenges, and enjoys mentoring others and raising quality standards. As a member of this team, you will strengthen the foundations of our mobile platform, enabling FanDuel engineers to deliver features more effectively while maintaining platform quality and best practices.

We are a growth company so there are plenty of opportunities for you to learn & grow with us.

Some of your responsibilities will include:

• Enhancing the core React Native codebase for the Sportsbook app, focusing on performance, scalability, and maintainability
• Profiling and optimising app startup and runtime performance across the React Native stack (rendering, bundle size, memory, JS/native thread work, etc.)
• Building and maintaining shared frameworks, tooling, libraries, and components that support feature teams
• Improving developer experience through better tooling, documentation, templates, CI reliability, and build performance
• Contributing to technical design discussions and leading multi-phase improvements, breaking work into incremental, testable deliveries aligned with team priorities
• Supporting continuous improvement initiatives that raise quality, reduce toil, and improve operational readiness within the domain
• Joining our on-call rota, sharing out of hours support duties as part of our incident response process

What We're Looking For

• Significant experience delivering production React Native applications (OR strong React skills with interest in mobile development)
• Strong TypeScript skills and a solid understanding of React patterns, architecture, and maintainable code practices at scale
• Practical experience profiling and improving performance in React Native applications (startup time, rendering, responsiveness, memory, etc.)
• Experience with React Native native modules / bridging; native Android (Kotlin/Java) and/or iOS (Swift) experience is a plus
• Familiarity with mobile development best practices, testing strategies, and CI/CD pipelines
• Experience working in Agile teams and contributing to collaborative technical standards
• A quality-focused mindset with strong problem-solving skills and the ability to evaluate trade-offs in ambiguous situations

Additionally, our Senior Engineers can:

• Contribute meaningfully to technical design discussions and propose pragmatic solutions aligned with our technical vision
• Take ownership of delivering platform improvements end to end, including measurement, rollout, and iteration
• Mentor and support other engineers, raising the bar through thoughtful reviews, coaching, and knowledge-sharing
• Participate in wider engineering community initiatives and help spread best practices

THE ROSTER

At FanDuel, we give fans a new and innovative way to interact with their favorite games, sports and teams. We’re dedicated to building a winning team and we pride ourselves on being able to make every moment mean more, especially when it comes to your career. So, what does “winning” look like at FanDuel? It’s recognition for your hard-earned results, a culture that brings out your best work—and a roster full of talented coworkers. Make no mistake, we are here to win, but we believe in winning right. That means we’ll never compromise when it comes to looking out for our teammates. From creatives professionals to cutting edge technology innovators, FanDuel offers a wide range of career opportunities, best in class benefits, and the tools to explore and grow into your best selves. At FanDuel, our principle of “We Are One Team” runs through all our offices across the globe, and you can expect to be a part of an exciting company with many opportunities to grow and be successful.

ABOUT FANDUEL

FanDuel Group is the premier mobile gaming company in the United States and Canada. FanDuel Group consists of a portfolio of leading brands across mobile wagering including: America’s #1 Sportsbook, FanDuel Sportsbook; its leading iGaming platform, FanDuel Casino; the industry’s unquestioned leader in horse racing and advance-deposit wagering, FanDuel Racing; and its daily fantasy sports product.  

In addition, FanDuel Group operates FanDuel TV, its broadly distributed linear cable television network and FanDuel TV+, its leading direct-to-consumer OTT platform. FanDuel Group has a presence across all 50 states, Canada, and Puerto Rico.

The company is based in New York with US offices in Los Angeles, Atlanta, and Jersey City, as well as global offices in Canada and Scotland. The company’s affiliates have offices worldwide, including in Ireland, Portugal, Romania, and Australia.

FanDuel Group is a subsidiary of Flutter Entertainment, the world's largest sports betting and gaming operator with a portfolio of globally recognized brands and traded on the New York Stock Exchange (NYSE: FLUT).

Diversity, Equity and Inclusion

FanDuel is an equal opportunities employer. Diversity and inclusion in FanDuel means that we respect and value everyone as individuals. We don't tolerate bias, judgement or harassment. Our focus is on developing employees so that they reach their full potential.

FanDuel is committed to providing reasonable accommodations for qualified individuals with disabilities. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please email Benefits@fanduel.com.

The requirements listed in our job descriptions are guidelines, not hard and fast rules. You don’t have to satisfy every requirement or meet every qualification listed. If your skills are transferable and you are in the ballpark experience-wise, we'd love to speak to you!

THE POSITION

Our roster has an opening with your name on it

We’re growing our Market Making Engineering team that works on some of the coolest software in the industry - the systems that quote, price, and manage risk in real time for high-volume, high-velocity sports markets. This work spans the full RFQ/quote lifecycle (request → quote → accept → outcome) in low-latency, event-driven services. The team you will join works with quantitative analysts and trading/risk stakeholders to implement and run market making strategies, while proactively identifying opportunities for technical innovation within the Risk and Trading organization. Our stakeholders are the people who establish prices and manage risk for the #1 sports book in America! We’re looking for a Senior Staff Software Engineer. 

As a Senior Staff Software Engineer, you will lead an empowered, multidisciplinary team, autonomously tackling complex challenges that provide the very best experiences and products for a growing community of millions of players. The ideal candidate will have the confidence to propose pragmatic solutions to complex problems and be eager to learn from and educate others. You will help make technical decisions that will impact the broader organisation. This necessitates empathetic communicators with a commitment to outreach, documentation, assisting others, and continuous improvement.

THE GAME PLAN

Everyone on our team has a part to play

• 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 lead team evolution 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
• Your influence extends beyond the team at and org level
• 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’re looking for in our next teammate

• BA/BS degree in Computer Science or related software engineering field, or equivalent practical experience. 7+ years of relevant work experience OR 5+ years of relevant work experience with a MS in Computer Science or related technical field.
• At least one frontend specialisation in any of the following: building native apps (Kotlin, Swift) or web apps using React (JavaScript or TypeScript) or hybrid apps using React Native
• Experience building or contributing to an advanced shared library, design system, or SDK
• Understanding of modern architectures, design patterns, and platform nuances 
• Knowledge of web libraries and frameworks, such as Typescript, React, Angular, and/or Bootstrap 
• Familiarity with full stacks, single-page applications and/or micro frontends 
• Expert experience with testing concepts, test tools, and integrating testing and best practices in the SDLC 
• Strong sense of ownership, urgency, and drive. 
• Familiarity working in an Agile environment 
• Passion for working within a fast-paced environment and can adapt to change 

PLAYER BENEFITS

We treat our team right
 
From our many opportunities for professional development to our generous insurance and paid leave policies, we’re committed to making sure our employees get as much out of FanDuel as we ask them to give. Competitive compensation is just the beginning. As part of our team, you can expect:

• An exciting and fun environment committed to driving real growth
• Opportunities to build really cool products that fans love
• Career and professional development resources to help you refine your game plan for owning and driving your career and development
• Be well, save well and live well - with FanDuel Total Rewards your benefits are one highlight reel after another

Diversity, Equity and Inclusion

FanDuel is an equal opportunities employer. Diversity and inclusion in FanDuel means that we respect and value everyone as individuals. We don't tolerate bias, judgment or harassment. Our focus is on developing employees so that they reach their full potential.

The requirements listed in our job descriptions are guidelines, not hard and fast rules. You don’t have to satisfy every requirement or meet every qualification listed. If your skills are transferable and you are in the ballpark experience-wise, we'd love to speak to you!