Software Engineer III - Platform, Fanatics Markets in London

About Fanatics Markets

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 are looking for the right people to help us build the future of prediction markets.

Role Overview

As a Software Engineer III, Platform, you will be a key driver of our core infrastructure and developer experience. You will design and implement durable platform abstractions and partner with engineering leads to ensure our systems enable rapid innovation without compromising stability or security. This role requires a balance of deep hands-on engineering and systems thinking. You will own complex features from ideation to production, championing best-in-class platform standards and mentoring mid-level engineers while remaining deeply embedded in the codebase.

On the engineering side, we are pioneering the use of AI as a code collaborator. We need engineers who have moved beyond experimentation—who actively use tools like Claude Code, Cursor, or GitHub Copilot to ship production code faster while maintaining exceptional quality.

Responsibilities

• Implement team-level standards for AI-augmented development, utilising prompt engineering and validation frameworks to increase velocity without sacrificing code quality.
• Identify and mitigate AI-generated code pitfalls, such as security vulnerabilities or over-abstraction, and assist in tracking team productivity metrics.
• Design, build, and maintain highly available cloud-native infrastructure, ensuring the platform scales reliably with our growing user base.
• Build and optimise CI/CD pipelines and developer tooling to eliminate friction in the software delivery lifecycle.
• Implement and maintain platform security safeguards and compliance standards to protect the integrity of the firm's systems.
• Contribute to the system observability roadmap by implementing monitoring, tracing, and alerting to ensure high operational reliability.
• Partner with product and engineering teams to translate technical requirements into scalable platform solutions.
• Mentor junior and mid-level engineers, lead incident response for team-owned services, and advocate for modern engineering best practices.

Qualifications

• 5 plus years of experience in platform engineering, DevOps, or backend engineering, with a track record of building scalable, cloud-native environments (AWS/Kubernetes).
• Strong proficiency in using AI collaborators (Claude Code, Cursor, Copilot) to ship production code and an ability to optimise personal development workflows.
• Ability to evaluate AI-generated code for security gaps or architectural "hallucinations" and implement testing strategies.
• Strong hands-on experience with IaC frameworks such as Terraform, Pulumi, or CloudFormation.
• High proficiency in Java and Python (Golang is a plus). You should be comfortable bridging the gap between infrastructure and application logic.
• Experience building mature CI/CD pipelines and working with observability tools (e.g., Prometheus, Grafana, Datadog).
• Proven ability to take ownership of complex projects in a fast-paced environment, balancing speed with architectural health.
• Strong communication skills and the ability to collaborate effectively with distributed engineering and product teams.

Preferred Qualifications

• Experience in high-growth startup environments.
• Experience with financial systems, real-money transactions, or regulatory compliance.
• Background in building internal developer tools or CLI applications.
• Experience leading small project groups or "squads" within a larger team.

We are serious about AI-augmented development. During our technical interviews, be prepared to:

• Demo your current AI-assisted workflow (e.g., how you use Cursor or Copilot).
• Discuss specific examples of how you've used AI to solve complex technical hurdles.
• Share your strategies for ensuring AI-generated code meets production-grade security and maintainability standards.

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, but we strongly encourage those who can join us on campus two days per week. Remote employees may also be eligible for a home office setup stipend.

Depending on the role, your interview and onboarding experience may include in-person components, such as onsite interviews or Launching into Better: LIVE—a multi-day cultural immersion in New York City for full-time, non-seasonal hires. These sessions are designed to build connection and bring our culture to life, though travel and participation requirements will be confirmed based on your role and location. Your recruiter will provide clear guidance at each stage of the process.

About the Team

Launched in 2021, Fanatics Betting and Gaming is the online and retail sports betting subsidiary of Fanatics, a global digital sports platform. The Fanatics Sportsbook is available to 95% of the addressable online sports bettor market in the U.S. Fanatics Casino is currently available online in Michigan, New Jersey, Pennsylvania and West Virginia. Fanatics Betting and Gaming operates twenty-two retail sports betting locations, including the only sportsbook inside an NFL stadium at Northwest Stadium. Fanatics Betting and Gaming is headquartered in New York with offices in Denver, Leeds and Dublin.