Javascript jobs in United Kingdom

Office location: Cambridge, UK – This position offers flexible working options, including predominantly remote work. Applicants should be based (or willing to relocate) within a comfortable commuting distance of our office to attend onsite as required.

Are you a Full Stack Engineer who enjoys building scalable, secure, and user-focused systems while working as part of a collaborative team peers?

As a Full Stack Engineer in the Player Gateway team at Jagex, you’ll be part of our Central Technology group, providing the backbone behind our games. You’ll design and deliver the systems that enable millions of players to access the RuneScape games seamlessly, powering core platform journeys such as login, account management, and cross-platform connectivity.

You’ll work on high-impact projects across the full software development lifecycle, helping define how players interact with our games. You'll collaborate closely with engineers across the company to support shared services and integrations, and act as a mentor to junior team members, leading by example through high‑quality engineering practices.

• Contributing to all areas of the Software Development Lifecycle, including secure‑by‑design coding, automated testing, code review, documentation and deployment.
• Delivering code that meets the code standards, principles and best practices of the department ensuring quality in the work you deliver.
• Contributing to your team or domain by successfully delivering on projects of moderate scope, complexity and critical business impact.
• Contributing to make services monitored, scalable, robust, highly available and performant.
• Working as part of a team to maintain and support highly available software and user journeys.
• Providing on‑call support as part of our rota to troubleshoot and resolve out‑of‑hours production issues.
• Looking for opportunities to improve systems, services, and processes, working with the team to deliver possible improvements.
• Understanding and demonstrating agile principles and values.
• Acts as a role model for more junior engineers, living the company values and behaviours.
• Work as part of a team, ensuring the right balance between product, production and engineering to deliver on business value and demonstrate Jagex values.
• Supporting evaluation of both off‑the‑shelf and in‑house solutions to identify the best fit for the business.

• Experience delivering web applications or contributing to large established software projects as an Engineer.
• Proficiency in Java or C#, including experience with backend development and ideally frameworks such as Spring Boot.
• Proficiency in JavaScript/TypeScript and experience using modern front‑end frameworks such as React, Next and Node.
• Experience building and integrating RESTful services and publish‑subscribe messaging systems.
• Demonstrable experience with automated testing frameworks (unit, mock, and integration).
• Some knowledge of how AWS Cloud and/or Azure work with a willingness to learn and manage AWS services and IaC tooling such as Terraform.
• 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 strong communication and collaboration skills with both technical and non‑technical team members.
• Strong problem‑solving, debugging, profiling, and optimisation skills.

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!

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.