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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 70000 - 90000 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 Software Engineer - Fullstack in London employer: Fanatics
Contact Detail:
Fanatics Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Software 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 and boost your confidence.
✨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 genuinely interested in joining our team.
We think you need these skills to ace Senior Software Engineer - Fullstack in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that match the job description. Highlight your experience with modern JavaScript/TypeScript, React, and any relevant projects you've worked on. We want to see how you can contribute to our team!
Craft a Compelling Cover Letter: Your cover letter is your chance to show us your personality and passion for the role. Share why you're excited about working with Fanatics and how your background aligns with our mission. Keep it engaging and concise!
Showcase Your Projects: If you've worked on any interesting projects, especially those involving AI tools or blockchain dApps, make sure to mention them! We love seeing real examples of your work and how you've used technology to solve problems.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way to ensure your application gets into the right hands. Plus, it shows us you're serious about joining our team at Fanatics!
How to prepare for a job interview at Fanatics
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially React, Next.js, and TypeScript. Brush up on your knowledge of performance optimisation and responsive design, as these are crucial for the role.
✨Showcase Your AI Experience
Since the role involves using AI tools like Claude Code or GitHub Copilot, be prepared to discuss how you've used these tools in your previous projects. Share specific examples of how they improved your workflow or code quality.
✨Prepare for Problem-Solving Questions
Expect to face questions that assess your problem-solving skills, especially in a 0→1 environment. Think of scenarios where you had to make quick decisions or adapt to changing priorities, and be ready to explain your thought process.
✨Demonstrate Team Collaboration
This role requires a team-first mentality, so be ready to discuss how you’ve collaborated with cross-functional teams in the past. Highlight any experiences where you influenced technical direction or contributed to team standards.