Senior Software Engineer - Ruby
Legend is hiring a Senior Software Engineer reporting directly to our Senior Engineering Manager. This is an opportunity to shape the technical foundation of a high-growth product in the competitive gaming space - a market scaling rapidly worldwide. You’ll help design and implement the backend and platform architecture that powers real-time tournaments, delivering scalable, secure, and high-performing systems players rely on. You’ll collaborate closely with engineers, product managers, and designers to deliver high-quality solutions while applying modern practices like Domain-Driven Design, SOLID, and GRASP. If you thrive in fast-paced environments, enjoy tackling tough scaling challenges, and want to shape the future of competitive gaming, this is your chance to make your mark. In this role, we value diverse perspectives and encourage you to apply even if you don’t meet every qualification listed.
- Design and implement application architecture that is scalable, maintainable, observable, and high-performing.
- Write clean, efficient, and well-documented Ruby/JavaScript (or other backend language) code.
- Conduct code reviews, review architecture, and contribute to engineering best practices.
- Identify and optimise performance bottlenecks across systems.
- Collaborate closely with cross-functional teams to deliver impactful features.
- Ensure application security, implementing safeguards against vulnerabilities.
- Proven experience delivering large-scale systems in production.
- Strong grounding in Domain-Driven Design, API-first architecture, and software design patterns.
- Proficiency in JavaScript (React/Next) or another backend language, with knowledge of Ruby.
- Experience with Pub/Sub, websockets, and Server-Sent Events (SSE).
- A strong product engineering mindset - able to translate requirements into technical designs and ship features end-to-end.
- Super smart colleagues to work alongside and learn from.
- Engaging development opportunities at all levels.
- Tailored flexibility for your work-life balance.
- Annual discretionary bonus to reward your efforts.
- Paid annual leave PLUS a well-deserved break to recharge during the festive season! Our offices close between Christmas and New Year’s - no need to dip into your allowance.
- Exciting global Legend events, where we unite in person to ignite our shared passion and unveil the exciting strategies for the year ahead!
- Unlock your full potential by joining the Legend team.
Legend is the company behind more than 25 sports and gaming brands, focused on player experience across betting and gaming. It operates with a global team of over 800 people across 10 hubs worldwide, building and growing its portfolio of brands. The company describes its approach as driven by data, creativity and collaboration, summarised in its "Mindset, Vision, Performance" formula. Headquartered in St Helier, Jersey, Legend operates hubs across Europe and North America. In 2026 Genius Sports announced a definitive agreement to acquire the company.
