Senior UI Engineer

Location: Cambridge, UK – (Remote available within the UK with team onsite days in the Cambridge office approx. 4 times per year)

Are you an experienced UI Engineer who loves multiplayer gaming and has a drive to craft innovative, high-quality user experiences in Unreal Engine 5?

As a Senior UI Engineer on RuneScape: Dragonwilds, our new open world survival crafting gamecurrently in early access and developed in UE5, you will play a key role in defining and implementing intuitive and performant user interface systems for this new exciting game in the RuneScape Franchise.

You will become the go-to person for all things UI, designing and owning complex UI features and working closely with designers, artists, and programmers to create a seamless user experience.

This is an opportunity to truly take ownership of the UI domain and leave your mark on the visual and functional language of our game in which you’ll pair strong C++ skills with a deep understanding of UX, thriving in a collaborative, cross-discipline environment where innovation, quality, and clarity drive everything we do.

What you’ll be doing:

• Create, maintain, and own a wide variety of UI features, ensuring they are performant, scalable, and user-focused.
• Partner with designers and artists in strike teams to deliver cohesive and polished features.
• Select the best technical solutions, architectures, and pipelines for UI development tasks.
• Test, debug, profile, and optimise UI systems to ensure a high-quality experience.
• Identify risks and opportunities throughout development, proactively proposing effective solutions.
• Mentor peers and support recruitment for the engineering team.
• Champion best practices in UI engineering, contributing to the team’s continuous improvement.

What we’re looking for:

• Proven expertise in designing and implementing complex UI features for multiplayer games.
• Strong understanding of UX principles and a passion for crafting player-friendly interfaces.
• Deep knowledge of C++ and experience with a proven ability to apply this experience with other programming languages (c#, python, etc).
• Demonstrable experience with UE4 or UE5 (including UMG, Slate, and Common UI).
• Skilled at profiling and optimising code for performance.
• Ability to design complex systems using appropriate patterns, solving architectural and system-level problems.
• Familiarity with source code repository usage (perforce).
• Experience mentoring other engineers and promoting a culture of learning and sharing.
• Excellent communicator who thrives in collaborative environments with a distributed workforce.

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, which includes two of the world’s longest running and most successful MMORPGs, in 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: 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.

With over two decades of experience, and over 400 people in our team, we continue to innovate in live game development, leveraging data-driven insights, and a commitment to player-first game design. We have a diverse and talented team where creativity, collaboration, and community-driven game development drives everything we do.

As part of Jagex, you’ll have the opportunity to work on a globally successful franchise, contribute to exciting new projects, and be part of a company that hugely values both our employees and our players.