Senior Software Engineer

FanDuel; New York (NY); On-site; USD 138,000 - 173,000; Full time

Benefits offered by this job

FanDuel Total Rewards

Annual bonus

Long-term incentives

401k match

Commuter benefits

Pet insurance

Job summary

FanDuel in New York is hiring a senior full-stack software engineer to lead design, development, and delivery of high-scale applications. You will define the frontend architecture and extend backend services, mentoring others and shaping technical direction.

You will work across stack with modern frameworks, build resilient, secure systems, and collaborate with product teams to drive key initiatives in a fast-paced environment.

Qualifications

• 5+ years building and shipping production software.
• Deep expertise in modern web frontend architecture with TypeScript, JavaScript (ES6+), and React.
• Mobile development with React Native and native (Swift/iOS and Kotlin/Android) readiness.
• Strong HTML5, CSS3, responsive design and cross-browser compatibility.
• Frontend performance optimization and Core Web Vitals.
• Test-first mindset with frontend testing (Jest, RTL).
• Backend services in Java and Spring Boot to extend APIs.

Responsibilities

• Define and shape the long-term architectural vision for core full stack and microservices platforms.
• Lead cross-team technical initiatives to extend engineering standards.
• Mentor engineers, set technical direction, and raise standards across the team.
• Architect scalable, resilient frontend and backend systems for high-traffic apps.
• Partner with product and business stakeholders to clarify requirements early in the lifecycle.
• Develop high-performance front-end interfaces and GraphQL APIs.

Skills

TypeScript

React

React Native

Java

Spring Boot

GraphQL

HTML5

CSS3

CI/CD

AWS

AI tooling

Leadership

Cross-functional

Education

CS degree or equivalent

Tools

Docker

Kubernetes

Gradle

Buildkite

Terraform

Cosmo

Job description

THE POSITION

Our roster has an opening with your name on it

Our roster has an opening with your name on it

We are looking for a full stack Senior Software Engineer to lead the design, development, and delivery of high-scale applications. In this role, you will autonomously architect resilient systems, establish modern engineering standards, and collaborate closely with cross-functional partners to drive key technical and product initiatives across the organization. You'll own the frontend architecture of our web and mobile products end to end, while working comfortably across the stack to build and extend the services that power them. This is a senior role: you'll set technical direction, raise the quality bar, and mentor other engineers.

In addition to the specific responsibilities outlined above, employees may be required to perform other such duties as assigned by the Company. This ensures operational flexibility and allows the Company to meet evolving business needs.

THE GAME PLAN

Everyone on our team has a part to play

• Autonomously drive sustained business impact across team goals, product capabilities, and technical systems.
• Take ownership of semi-annual and annual technical objectives, consistently delivering high-quality, mission-critical systems on schedule.
• Define and shape the long-term architectural vision for core full stack and microservices platforms.
• Architect technical solutions for complex, ambiguous engineering challenges, making sound trade-offs between immediate velocity and long-term system health.
• Lead cross-team technical initiatives to extend software standards and platform impact across the engineering organization.
• Mentor engineers, influence organizational design standards, and champion best engineering and operational practices.
• Proactively manage technical dependencies and align architectural strategy across external engineering teams.
• Partner with product and business stakeholders to resolve ambiguity, clarify requirements, and address technical risks early in the lifecycle.
• Leverage deep domain knowledge to guide technology choices independently in fast-paced, high-scale environments.
• Streamline complex application architecture by focusing on core scalability, efficiency, and critical business outcomes.
• Architect and build applications that are resilient, secure, and maintainable under high traffic loads.
• Develop high-performance front-end interfaces and back-end microservices utilizing modern frameworks and design patterns.
• Design, build, and optimize high-throughput GraphQL APIs to power seamless client applications and backend integrations.
• Lead rigorous code reviews, establish testing strategies, and enforce engineering excellence across the software development lifecycle.

THE STATS

What we’re looking for in our next teammate

• Degree in Computer Science or a related field, or equivalent practical experience, with 5+ years building and shipping production software.
• Deep expertise in modern web frontend architecture with TypeScript, JavaScript (ES6+), and React — including component design, state management, and hooks.
• Mobile development with React Native, plus readiness to work natively: we’re migrating our mobile apps to native (Swift/iOS and Kotlin/Android) with the help of AI tooling, so you’re either comfortable in native mobile or a strong engineer eager to pick it up fast. Existing Swift or Kotlin experience is a plus.
• Strong command of HTML5, CSS3, responsive design, and cross-browser/cross-device compatibility across web and mobile.
• Proven track record of frontend performance optimization: code splitting, lazy loading, bundle/asset optimization, rendering performance, and Core Web Vitals.
• Test-first mindset with hands-on frontend testing experience (e.g., Jest, React Testing Library) and a commitment to code quality, maintainability, and observability.
• Working knowledge of backend services in Java and Spring Boot — enough to build and extend APIs and collaborate closely with backend teams.
• Experience consuming and integrating APIs on the client, including GraphQL.
• Solid grasp of software design patterns and architectural best practices for reliable, scalable, maintainable systems.
• Hands-on use of AI development tools (AI coding assistants, agentic IDEs, LLM-based testing or review tools) in real projects.
• Strong communication and cross-functional collaboration skills.
• Proven technical leadership: mentoring engineers, setting technical direction, and raising engineering standards across a team.

Preferred Skills

• Experience with design systems, reusable component libraries, and accessibility (WCAG) best practices.
• Familiarity with relational databases, messaging/streaming concepts (e.g., Kafka), and GraphQL federation (e.g., Cosmo).
• Experience with CI/CD pipelines and build tooling (e.g., Gradle, Buildkite).
• Cloud infrastructure (preferably AWS), containerization (Docker), and orchestration (Kubernetes); exposure to Helm and Terraform a plus.

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).

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.

FanDuel is an equal opportunities employer and we believe, as one of our principles states, “We are One Team!”. As such, we are committed to equal employment opportunity regardless of race, color, ethnicity, ancestry, religion, creed, sex, national origin, sexual orientation, age, citizenship status, marital status, disability, gender identity, gender expression, veteran status, or any other characteristic protected by state, local or federal law. We believe FanDuel is strongest and best able to compete if all employees feel valued, respected, and included.

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 [e-mail].

The applicable salary range for this position is $138,000 - $173,000 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.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.