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 technically minded game designer with a deep love of Old School RuneScape and a passion for building smart, scalable systems?

As a Technical Designer within the Old School RuneScape Mobile team, you’ll play a key role in designing and implementing engaging content with a strong focus on technical foundations. You’ll combine creative design thinking with scripting expertise, ensuring content is not only fun and memorable, but technically sound and efficient within the OSRS engine.

Working in multi-disciplinary teams, you’ll help shape weekly game updates for one of the world’s most community-driven MMORPGs, while continuously expanding your knowledge of our systems, engine capabilities, and in-house tools. 

What you’ll be doing:

• Design and implement engaging game content and systems that leverage the technical strengths of Old School RuneScape while supporting the mobile player experience.
• Script gameplay features and technical solutions using our in-house language, RuneScript, delivering scalable and maintainable implementations.
• Provide technical input across the team, ensuring content is efficient, stable, and aligned with engine and platform constraints.
• Create and maintain technical documentation, workflows, and tooling that support development efficiency and long-term maintainability.
• Build a deep understanding of the game’s core systems, engine behaviour, and mobile platform considerations to inform implementation decisions.
• Collaborate within multi-disciplinary development teams to deliver live game updates and mobile-focused improvements within a weekly release cadence.

What we’re looking for: 

• Technical experience with scripting or programming, and the ability to apply problem-solving skills to complex systems.
• Strong understanding of MMORPG systems and their internal structures.
• Proven experience working within a game design or development team and familiarity with development processes.
• Ability to manage your time effectively in a fast-paced live game environment.
• A deep working knowledge of Old School RuneScape, RuneScape or other MMOs, including skills, quests, metas and player behaviours would be very beneficial.

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!

Right to Work Statement

This role is only open to applicants who have the permanent right to work in the UK. We are unable to provide or take over visa sponsorship for this position, either now or in the future. Applicants must therefore be able to demonstrate their ongoing eligibility to work in the UK without the need for employer sponsorship.

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 https://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.

Inclusion & Accessibility Statement

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.