Senior Full Stack Engineer

Location: Cambridge, UK – Hybrid (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 attend onsite as required.)

Want to work on the core technologies that power the RuneScape franchise and help shape the future of Jagex’s platform capabilities?

As a Senior Full Stack Engineer within our Central Technology team, you’ll contribute to the delivery of scalable game technologies, tools, and services that accelerate every product and team across the studio. You’ll act as a subject matter expert, delivering complex technical solutions while also supporting and mentoring engineers to help them grow. This is a highly impactful role that underpins the success of our games and our players’ experience.

What you’ll be doing

• Contributing to all areas of the Software Development Lifecycle, including secure-by-design coding, automated testing, code review, and deployment.
• Ensuring solutions meet technical requirements and product needs through deep technical expertise and adherence to Jagex standards.
• Being accountable for the quality of deliverables for which you act as subject matter expert.
• Supporting evaluation of both off-the-shelf and in-house solutions to identify the best fit for the business.
• Helping engineers break work into manageable, well-estimated stories that deliver product value within the sprint.
• Identifying opportunities to improve systems, services, and processes, and collaborating across teams to deliver these improvements.
• Providing on-call support to troubleshoot and resolve out-of-hours production issues.

What we’re looking for

• Extensive experience delivering web applications or large software projects as a Senior Engineer.
• Proficiency in Java, including experience with Java backend development and frameworks such as Spring Boot.
• Proficiency in JavaScript/TypeScript and experience using modern front-end frameworks such as React.
• Experience building and integrating RESTful services and publish-subscribe messaging systems.
• Experience with automated testing frameworks (unit, mock, and integration).
• Experience using AWS Cloud and working with managed AWS services.
• Experience with IaC tooling such as Terraform.
• Strong knowledge of version control and CI/CD systems (e.g., Git, Bitbucket Pipelines, Bamboo) and supporting tools such as Ansible and Helm.
• Familiarity with microservices backend architectures.
• Proven experience communicating technical solutions effectively to non-engineering stakeholders.
• Experience working on established codebases.
• Strong problem-solving, debugging, profiling, and optimisation skills.

What we offer

When you join Jagex you can look forward to a generous Perks & Benefits package including:
Private Healthcare, including Dental Plan.
Minimum 6% Pension contributions.
Employee Assistance Programme & onsite Counselling.
Life Insurance.
Discretionary annual performance bonus.
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

Jagex is a leader in developing and publishing deep, engaging online games that connect millions of players worldwide. Best known for the RuneScape franchise—including two of the world’s longest running and most successful MMORPGs, Old School RuneScape and RuneScape—and the open-world survival crafting game, RuneScape: Dragonwilds, we have proven success in delivering immersive Forever Games and fostering strong player communities.

We strive to foster an inclusive workplace built on trust, autonomy, and a shared passion for creating forever games. Our values guide everything we do: Embrace Fellowship, Hone Your Craft, Honour Your Vows, Be Your Customers’ Hero, and Seize The Day.

With over two decades of experience and more than 400 team members, we continue to innovate in live game development, leveraging data-driven insights and a commitment to player-first design. As part of Jagex, you’ll contribute to globally successful titles, shape new projects, and join a company that values both its employees and its players.

We are committed to providing equal opportunities and creating an environment where everyone can thrive. If you require any reasonable adjustments during the recruitment process, please let us know when you’re invited to interview.