Full Stack Engineer - Core Tech

Location: Cambridge, UK – This position can accommodate flexible working options. However, candidates must be based (or be willing to relocate) within a comfortable commuting distance of our Cambridge office to be able to attend onsite as required.

Are you a full stack engineer who thrives on building scalable, high-performance systems that power critical player journeys?

As a Full Stack Engineer in our Subscriptions and Payments team, you’ll help build and maintain the systems that enable players to purchase digital goods and subscriptions across the RuneScape franchise. From highly available backend services to seamless frontend experiences, your work will directly support millions of player transactions worldwide.

Working within a domain of significant business impact, you’ll contribute to secure, robust and scalable services while supporting junior engineers and continuously improving the reliability and performance of our subscription and payment platforms.

What you’ll be doing:

• Contribute across the full Software Development Lifecycle, delivering secure-by-design code supported by automated testing, peer review, documentation and deployment.
• Build and maintain backend services using Java and Spring Boot within a microservices architecture.
• Develop frontend applications using JavaScript/TypeScript and modern frameworks such as React, Next and Node.
• Design and integrate RESTful APIs and publish-subscribe messaging systems.
• Ensure services are monitored, scalable, highly available and performant.
• Maintain and support production systems, including participation in an on-call rotation.
• Contribute to system improvements, performance optimisation and architectural enhancements.
• Evaluate and implement off-the-shelf and in-house technical solutions where appropriate.

What we’re looking for: 

• Experience delivering web applications or contributing to established software systems in production environments.
• Strong backend development experience in Java, including frameworks such as Spring Boot.
• Proficiency in JavaScript/TypeScript and modern frontend frameworks such as React, Next or Node.
• Experience building and integrating RESTful services within microservices architectures.
• Familiarity with AWS cloud services and infrastructure-as-code tooling such as Terraform.
• Strong debugging, profiling and performance optimisation capability across full stack systems.

What we offer:

When you join Jagex you can look forward to a generous Perks & Benefits package including:

• Private Healthcare, including Dental Plan.
• Discretionary annual performance bonus.
• Minimum 6% Pension contributions.
• Life Insurance.
• Enhanced family leave policies from day 1.
• Flexible working hours.
• 25 days annual leave + Bank holidays & the option to buy/sell holidays + so much more!

About Jagex:

We are Jagex: The RuneScape Company. Home to one of gaming’s most enduring success stories. We create deep, community-powered games with worlds that evolve, inspire, and endure. Our flagship MMORPG franchise, RuneScape, has welcomed over 300 million player accounts, inspiring generations of players across PC and mobile for 25 years.

As we begin our 26th year, we are accelerating our strategy to expand RuneScape into a broader ecosystem of forever games and connected experiences, grounded in a renewed commitment to integrity and fair play. This includes the reduction of monetisation mechanics, as well as the launch of RuneScape: DragonWilds into Steam Early Access in 2025, representing a major step in building a multi-genre future for the RuneScape universe. We remain focused on building enduring worlds, empowering player-led innovation, and laying the foundations for the boldest era in RuneScape’s history. For more information, visit www.jagex.com.

Headquartered in Cambridge, United Kingdom, we are home to passionate creators, storytellers, engineers, and even a few dreamers, all united by a single mission to shape the future of online worlds and empower players to make them their own. We’re looking for people to join us who share our ambitions and values. We foster an inclusive workplace built on trust, autonomy, and a shared passion for creating experiences that inspire our communities.
Our values guide everything we do: We Embrace Fellowship by collaborating and sharing openly. We Hone our Craft by always learning and improving; We Honour our Vows by being honest and transparent; We are our Customers’ Heroes by striving to understand our team & player needs, and We Seize The Day by making the most of every opportunity.

Join us. The next era of RuneScape and the next chapter of Jagex: The RuneScape Company starts now.

We are committed to providing equal opportunities and creating an environment where everyone can thrive. We welcome applications from all backgrounds, and we recruit, develop, and promote based on merit and ability.

If you require any reasonable adjustments to support you during the recruitment process, please let us know when you’re invited to interview.