Full-Time

Senior Staff Software Engineer

Market Making

FanDuel

FanDuel

1,001-5,000 employees

Fantasy sports platform with paid contests

No salary listed

Remote in UK

Remote

Bachelor's, Master's

Category
Software Engineering (1)
Required Skills
Kotlin
Agile
JavaScript
React.js
Bootstrap
TypeScript
iOS/Swift
React Native
Angular

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Requirements
  • 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 specialization: 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.
Responsibilities
  • 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.
  • Propose pragmatic solutions to complex problems and educate others; help make technical decisions impacting broader organization.
  • Communicate empathetically, engage in outreach, documentation, assisting others, continuous improvement.
  • Experience in both quantitative modeling practices and coding; assist in the creation of models/strategies and productionalize this software.
  • Work in project ideas with stakeholders, and peers.
  • Own parts of product and technology and become subject matter experts.
  • Write simple and extendable code following standards and best practices; test code thoroughly.
  • Balance customer requirements with team requirements.
  • Lead team evolution; participate in code reviews, design discussions, planning, and ticket/metric/COE reviews.
  • Classify, store, and handle data in accordance with FanDuel policies.
  • Track security risks and mitigate/escalate them in a timely manner.
  • Focus on operational excellence; identify problems and propose solutions.
  • Take on projects and make software enhancements to improve team software and processes.
  • Work to resolve root causes of complex problems; leave software better and easier to maintain.
  • Train new teammates on architecture, operation, security, and how it fits into the bigger picture.
  • Influence beyond the team and org level.
  • Foster constructive dialogue and seek resolutions professionally.
  • Help recruit and interview for the team.
  • Estimate stories/tasks accurately and deliver on time.
  • Mentor and develop others.
  • On-call rotation where required; provide excellent customer support.
  • Keep up to date with market standards, open-source frameworks.
  • Build and evolve components that support real-time quoting and decisioning with attention to latency, throughput, correctness.
  • Implement and maintain risk controls and guardrails (exposure checks, limits, throttling/filters, kill switch patterns).
  • Ensure high-quality decision logging for debugging, replaying, and improvement using real quote/fill outcomes.
  • Partner with quants and stakeholders to define and monitor key metrics (quote ratio, win rate, expected vs realized margin, exposure/capital utilization).
  • Humbl e, pragmatic, self-managed, thirsty for knowledge, never satisfied; responsible for code state.
  • Creative problem-solving ability.
  • Passion for learning and always getting better.

FanDuel runs a fantasy sports platform where sports fans enter daily or weekly contests to win real cash prizes. Users create fantasy teams made from real players and compete based on those players' actual game statistics. The platform charges entry fees for contests, which is how it makes money, and it provides live scoring updates and player news to improve the experience. What sets FanDuel apart is its large, US-focused presence, a wide range of contest formats, and strong live-updating features that keep users engaged as games happen. The company aims to grow its online gaming and sports entertainment offering by expanding its contest options and audience reach while continuing to provide clear, accessible ways to win cash prizes.

Company Size

1,001-5,000

Company Stage

Private

Total Funding

$435.9M

Headquarters

New York City, New York

Founded

2009

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Simplify Jobs

Simplify's Take

What believers are saying

  • Flutter reported 19% iGaming revenue growth in Q1 2026, led by FanDuel Casino.
  • FanDuel Predicts operates in 16 states, widening reach beyond sportsbook jurisdictions.
  • Almond Digital integration in Pennsylvania strengthens responsible-gaming credibility and regulator relationships.

What critics are saying

  • Flutter will lose up to $300 million EBITDA on FanDuel Predicts in 2026.
  • FanDuel cut several hundred jobs in June 2026, after prior November and March layoffs.
  • CFTC lawsuits or tribal injunctions can shut FanDuel Predicts' California and Texas growth.

What makes FanDuel unique

  • FanDuel Casino held 27.4% New Jersey iGaming share in April 2026.
  • FanDuel Predicts launched December 2025 and expanded sports contracts with Crypto.com June 9, 2026.
  • PokerStars on FanDuel led standalone New Jersey poker in April, with 58% monthly growth.

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Benefits

From peer-to-peer learning to industry conferences, there are a number of ways to develop your career

From your head to your toes we’ve got you covered with our 100% health insurance coverage

We keep a well-stocked supply of snacks and refreshments to keep you going throughout the day

Flexible hours and vacation scheduling let you work when you’re at your best

We provide the latest tech and equipment, you get the job done

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

0%
Yahoo Finance
Aug 7th, 2026
DraftKings and FanDuel claim prediction markets have 'low single-digit' impact despite 50-69% stock drops

DraftKings and FanDuel insist prediction markets are having minimal impact on their sportsbooks, despite significant stock declines. DraftKings shares have fallen roughly 50% over the past year, whilst FanDuel parent Flutter Entertainment has dropped close to 69%. Both companies missed earnings expectations this week. DraftKings maintained its full-year guidance, but Flutter cut its profit forecast by 22%. Despite this, shares rose following second-quarter results—DraftKings up around 6% and Flutter up over 2% by mid-afternoon Friday. DraftKings reports "no discernible impact" from prediction markets, with only 1% customer overlap with the largest prediction-market operator in legal sports betting states. FanDuel has seen a "low single-digit" impact. Both companies launched their own prediction-market platforms late last year, focusing on states without legal sports betting. DraftKings says its platform is "growing faster than anticipated".

Yahoo Finance
Jun 12th, 2026
FanDuel owner Flutter to delist from London Stock Exchange on 3 August

Flutter Entertainment will delist from the London Stock Exchange on 3 August, making the New York Stock Exchange its sole primary trading venue. The company's shares will trade on the LSE for the last time on 31 July. The FanDuel owner cited low LSE trading volumes, listing costs and ongoing UK regulatory obligations in its decision. Flutter moved its primary listing from London to New York in 2024, driven by FanDuel's accelerating growth in the US sports betting market, where the company now expects to generate the largest share of its profits. The delisting follows other significant changes at Flutter, including the departure of FanDuel CEO Amy Howe in May after five years leading the brand's expansion from 10 to 26 US states. Flutter carries a market capitalisation of approximately $19 billion.

Yahoo Finance
Jun 8th, 2026
FanDuel cuts hundreds of jobs in third round of layoffs within a year

FanDuel has conducted its third round of layoffs in less than a year, cutting several hundred employees across software engineering, customer service and business development. The cuts affected staff at various levels, including long-serving managers and employees who joined when FanDuel was a daily fantasy sports company. The sportsbook, owned by Flutter Entertainment, employs approximately 5,000 people, suggesting the layoffs represent 5% to 10% of its workforce. Previous rounds occurred in November and March, when FanDuel announced it would sunset its TV network, affecting over 100 employees. CEO Amy Howe departed in May after five years. A FanDuel spokesperson confirmed the restructuring aims to keep the company "agile, focused, and well-positioned" whilst executing its long-term strategy. The cuts reflect broader challenges facing gambling operators, including prediction market competition and pressure to improve profitability.

Yahoo Finance
Jun 8th, 2026
FanDuel cuts hundreds of jobs amid sports betting industry pressures

FanDuel laid off several hundred employees on Friday, affecting roughly 5% of its 5,000-strong workforce. The cuts impacted staff across business development, operations, customer service, social media and engineering departments. In internal emails, executives said the layoffs were necessary to execute long-term strategy but don't reflect financial concerns. The timing contrasts sharply with FanDuel's expensive promotional event in Times Square for the NBA Finals just days later. The redundancies follow previous cuts, including over 100 jobs lost when FanDuel TV was phased out last year. The company also ousted CEO Amy Howe in May after parent company Flutter missed Wall Street expectations. Some former employees suggested the company's spending on influencers and television deals contributed to the cuts.

Yahoo Finance
May 27th, 2026
PokerStars' FanDuel merger boosts US online poker revenue 58% in New Jersey

Flutter's decision to merge PokerStars with FanDuel and introduce interstate pooling across New Jersey, Pennsylvania and Michigan has delivered a significant revenue boost in April, the first full month following the 1 April transition. In Pennsylvania, FanDuel's poker revenue reached $1,034,096 in April, a 47.8% increase over the January-March average. New Jersey saw an even larger jump, with revenue of $769,600 representing a 58% increase over the prior three months, reclaiming the top position from WSOP Online. The move reversed negative year-over-year trends in both states. New Jersey's total online poker revenue rose 11.4% compared to April 2025, whilst Pennsylvania increased 9.7%. However, May's figures will reveal whether this growth stems from promotional offers or represents sustainable interest.