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For Companies At a Glance
- Tasks: Lead the design and development of innovative web applications for sports fans.
- Company: Join Fanatics, a global leader in digital sports platforms.
- Benefits: Competitive salary, remote work options, and home office setup stipend.
- Other info: Dynamic startup environment with opportunities for growth and innovation.
- Why this job: Be part of a pioneering team redefining fan engagement with cutting-edge technology.
- Qualifications: 4+ years in web development with modern JavaScript/TypeScript and React.
The predicted salary is between 60000 - 80000 ÂŁ per year.
About Us
Fanatics is building a leading global digital sports platform. We ignite the passions of global sports fans and maximize the presence and reach for our hundreds of sports partners globally by offering products and services across Fanatics Commerce, Fanatics Collectibles, and Fanatics Betting & Gaming, allowing sports fans to buy, collect, and bet.
Through the Fanatics platform, sports fans can buy licensed fan gear, jerseys, lifestyle and streetwear products, headwear, and hardgoods; collect physical and digital trading cards, sports memorabilia, and other digital assets; and bet as the company builds its Sportsbook and iGaming platform.
Fanatics has an established database of over 100 million global sports fans; a global partner network with approximately 900 sports properties, including major national and international professional sports leagues, players associations, teams, colleges, college conferences and retail partners, 2,500 athletes and celebrities, and 200 exclusive athletes; and over 2,000 retail locations, including its Lids retail stores. Our more than 22,000 employees are committed to relentlessly enhancing the fan experience and delighting sports fans globally.
Fanatics Markets is the real-money prediction and trading app where you can invest in moments you care about. Built on a secure platform, we let users predict real-world outcomes and trade on events they actually follow—from sports and entertainment to political elections and beyond. Our mission is to redefine how fans engage with the moments and markets that matter most. We’re looking for the right people to help us build the future of prediction markets.
Overview
This Software Engineer III (Full Stack) role is a senior-level individual contributor with significant ownership over the web application that customers use to interact with our product. You’ll join a true 0→1 team, helping define the product, technical foundations, and ways of working from scratch. You’ll lead by example, establishing best practices for AI-assisted development while building systems that can handle millions of events daily. On the engineering side, we’re pioneering the use of AI as a code collaborator. We need engineers who have gone beyond experimentation—who actively use Claude Code, Cursor, Codex, GitHub Copilot, or similar tools to ship production code faster while maintaining exceptional quality standards.
Responsibilities
- Lead the design, development, testing, and deployment of scalable, high-quality web experiences using React, Next.js, and modern JavaScript/TypeScript.
- Drive the technical evolution of our Markets web platform, partnering closely with product and design to deliver engaging, performant, and accessible features.
- Own features end-to-end: spec writing → implementation → instrumentation → deployment → monitoring → iteration based on metrics.
- Design and implement experimentation capabilities (feature flags, A/B tests) to validate ideas quickly and safely.
- Integrate with backend APIs and collaborate with platform teams to build reliable, observable systems.
- Make contributions to the Go backend.
- Conduct thorough code reviews, raising the bar on code quality, readability, and maintainability.
- Leverage AI tools to accelerate development velocity while maintaining high standards for security, correctness, and performance.
- Establish and document team standards for AI usage (prompt patterns, code review checklists, validation strategies).
- Contribute to a fast-paced 0→1 environment, unblocking others and taking initiative where processes are still being defined.
Qualifications
- Over 4 years experience building highly scalable, user-facing web applications using modern JavaScript/TypeScript and React.
- Experience in React architecture, component-driven development, and modern state management patterns, libraries like NextJS, TanStack Query, Tailwind, Zustand.
- Experience in developing blockchain dApps in EVM or Solana (including hackathons or side projects).
- Familiarity with common web3 libraries such as ethers.js, viem, or similar client libraries for interacting with smart contracts.
- Deep knowledge of JavaScript/TypeScript language features, idioms, and best practices, with the ability to influence team standards.
- Strong understanding of performance optimization, responsive design, accessibility, and web standards.
- Experience integrating with backend APIs and collaborating with cross-functional platform/infra teams.
- Experience with CI/CD pipelines, testing strategies, and safe deployment practices for web applications.
- Team-first mentality, with a willingness to do what it takes to get the job done and a desire to strive for better.
- Demonstrated experience using AI tools (Claude Code, Codex, Cursor, Copilot, etc.) to ship production code.
- Can demonstrate specific examples of workflow improvements (e.g., “reduced boilerplate generation time by 40%”).
- Effectively communicates complex technical concepts clearly to diverse audiences, including engineers and stakeholders.
- Thrives in a high-growth environment where priorities evolve regularly and decisions are made quickly.
- Strong ability to collaborate cross-functionally across diverse teams within large enterprise environments, supporting alignment and shared success.
Preferred Qualifications
- Previous experience in 0→1 or high-growth startup environments.
- Contributions to open-source projects or technical community.
- Experience with real-money transaction systems and regulatory compliance.
- Background in building developer tools or improving engineering productivity.
- Experience leading without authority and influencing technical direction across teams.
Ready to build the future of sports betting? If you possess some of these skills but not all of them, we still encourage you to apply!
Please note that visa sponsorship is not available for this position. We are open to fully remote candidates based in the United Kingdom. Remote employees may also be eligible for a home office setup stipend.
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Senior Product Engineer - Fullstack in London employer: Fanatics
Contact Detail:
Fanatics Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Product Engineer - Fullstack in London
✨Tip Number 1
Network like a pro! Reach out to folks in your industry on LinkedIn or at local meetups. A friendly chat can lead to opportunities that aren’t even advertised yet.
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repo showcasing your projects, especially those using React and TypeScript. This gives potential employers a taste of what you can do.
✨Tip Number 3
Prepare for interviews by practicing common technical questions and coding challenges. Use platforms like LeetCode or HackerRank to sharpen your skills before the big day.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen. Plus, we love seeing candidates who are proactive about their job search.
We think you need these skills to ace Senior Product Engineer - Fullstack in London
Some tips for your application 🫡
Tailor Your Application: Make sure to customise your CV and cover letter for the Senior Product Engineer role. Highlight your experience with React, TypeScript, and any AI tools you've used. We want to see how your skills align with what we're looking for!
Showcase Your Projects: Include specific examples of projects you've worked on, especially those that demonstrate your ability to build scalable web applications. If you've contributed to open-source or have side projects, let us know! We love seeing your work.
Be Clear and Concise: When writing your application, keep it straightforward. Use clear language to explain your experiences and achievements. We appreciate a well-structured application that gets straight to the point!
Apply Through Our Website: Don't forget to submit your application through our website! It’s the best way for us to receive your details and ensures you’re considered for the role. We can’t wait to hear from you!
How to prepare for a job interview at Fanatics
✨Know Your Tech Stack
Make sure you’re well-versed in modern JavaScript/TypeScript and React, as these are crucial for the role. Brush up on your knowledge of Next.js and state management libraries like Zustand, as you might be asked to discuss how you've used them in past projects.
✨Showcase Your AI Experience
Since the role involves leveraging AI tools for development, come prepared with specific examples of how you've used tools like GitHub Copilot or Claude Code. Highlight any improvements in your workflow or code quality that resulted from using these technologies.
✨Demonstrate Problem-Solving Skills
Be ready to discuss challenges you've faced in previous projects, especially in a 0→1 environment. Share how you approached these problems, the solutions you implemented, and the impact they had on the project or team.
✨Engage with the Company’s Mission
Familiarise yourself with Fanatics' mission and products. Be prepared to discuss how your skills can contribute to enhancing the fan experience and how you envision your role in building the future of sports betting.