At a Glance
- Tasks: Lead mobile engineering initiatives and shape architecture for player-facing systems.
- Company: Join Jagex, the creators of RuneScape, in a collaborative and innovative environment.
- Benefits: Enjoy flexible working, private healthcare, generous leave, and a performance bonus.
- Other info: Be part of a passionate team shaping the future of online worlds.
- Why this job: Make a real impact on gaming by delivering scalable mobile solutions for millions of players.
- Qualifications: Expertise in iOS and Android development with strong leadership skills.
The predicted salary is between 70000 - 90000 £ per year.
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 an experienced mobile engineer with a track record of leading large-scale technical initiatives and shaping mobile architecture across complex products? As a Principal Mobile Engineer, you’ll take ownership of mobile engineering direction across critical player-facing systems. From initial player onboarding through to ongoing engagement, you’ll define and deliver scalable, secure mobile solutions that support key journeys across the RuneScape franchise. Operating across multiple teams and domains, you’ll drive technical strategy, guide architectural decisions, and ensure delivery of high-quality mobile systems that meet the demands of a global player base.
What you’ll be doing:
- Own and drive mobile engineering initiatives across multiple projects, ensuring alignment with product goals and long-term technical strategy.
- Define and evolve mobile architecture across iOS and Android, ensuring scalability, performance, and maintainability.
- Lead the delivery of complex technical solutions, coordinating across teams and managing dependencies at a system level.
- Establish and uphold engineering standards across mobile development, including code quality, testing, and deployment practices.
- Identify and drive improvements to systems, services, and engineering processes to support reliable, scalable delivery.
- Work closely with backend, product, and platform teams to ensure seamless integration across services and user journeys.
- Guide technical decision-making, balancing short-term delivery with long-term system health and evolution.
What we’re looking for:
- Proven track record leading large-scale mobile engineering initiatives within production environments.
- Deep expertise in native mobile development across iOS (Swift / Objective-C) and Android (Kotlin / Java).
- Strong experience defining and evolving mobile architecture integrated with backend microservices.
- Strong understanding of the software development lifecycle, including CI/CD, testing, and release practices.
- Experience operating across teams to manage technical direction, dependencies, and delivery outcomes.
- Advanced debugging, performance optimisation, and system-level problem-solving capability.
- Experience with C++ is an advantage.
What we offer:
- 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!
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.
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.
Principal Mobile Engineer - Core Tech in Cambridge employer: Jagex Limited
At Jagex, we pride ourselves on being an exceptional employer, offering a vibrant work culture that champions creativity and collaboration. Our Cambridge office provides flexible working options, allowing you to balance your professional and personal life while enjoying a comprehensive benefits package that includes private healthcare, generous annual leave, and enhanced family leave policies. We are dedicated to fostering employee growth through continuous learning opportunities and a commitment to innovation, making us an ideal place for passionate individuals looking to shape the future of online gaming.
StudySmarter Expert Advice🤫
We think this is how you could land Principal Mobile Engineer - Core Tech in Cambridge
✨Tip Number 1
Network like a pro! Reach out to folks in the industry, especially those at Jagex. A friendly chat can open doors and give you insights that a job description just can't.
✨Tip Number 2
Show off your skills! If you've got a portfolio or GitHub with projects that highlight your mobile engineering expertise, make sure to share it during interviews. It’s a great way to demonstrate your capabilities.
✨Tip Number 3
Prepare for technical interviews by brushing up on your problem-solving skills. Practice coding challenges and system design questions that relate to mobile architecture. We want to see how you think on your feet!
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people. Plus, it shows you’re genuinely interested in joining our team at Jagex.
We think you need these skills to ace Principal Mobile Engineer - Core Tech in Cambridge
Some tips for your application 🫡
Tailor Your Application:Make sure to customise your CV and cover letter for the Principal Mobile Engineer role. Highlight your experience with mobile architecture and large-scale initiatives, as this is what we’re really looking for!
Showcase Your Skills:Don’t just list your skills; demonstrate them! Use specific examples from your past work that show how you’ve led mobile engineering projects and improved systems. We want to see your impact!
Be Clear and Concise:Keep your application clear and to the point. We appreciate well-structured documents that are easy to read. Avoid jargon unless it’s relevant to the role – we want to understand your experience without getting lost in technical terms.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way to ensure your application gets to us quickly and efficiently. Plus, you’ll find all the details about the role there!
How to prepare for a job interview at Jagex Limited
✨Know Your Tech Inside Out
As a Principal Mobile Engineer, you'll need to showcase your deep expertise in mobile development. Brush up on your knowledge of iOS (Swift/Objective-C) and Android (Kotlin/Java) before the interview. Be ready to discuss specific projects where you've led large-scale initiatives and how you tackled challenges.
✨Demonstrate Leadership Skills
This role requires you to lead and coordinate across multiple teams. Prepare examples that highlight your experience in guiding technical direction and managing dependencies. Think about times when you’ve driven improvements in engineering processes or standards, and be ready to share those stories.
✨Align with Company Values
Jagex values collaboration, honesty, and continuous improvement. Familiarise yourself with their mission and values, and think about how your own experiences align with them. During the interview, express your passion for creating engaging player experiences and how you can contribute to their vision.
✨Prepare for Technical Questions
Expect to face technical questions that assess your problem-solving skills and understanding of the software development lifecycle. Brush up on CI/CD practices, testing, and release strategies. You might also want to prepare for system-level problem-solving scenarios, as these will likely come up during the discussion.
