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- 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 private healthcare, flexible hours, 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. 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.
Principal Mobile Engineer - Core Tech in Cambridge employer: Jagex: The RuneScape Company
Contact Detail:
Jagex: The RuneScape Company Recruiting Team
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, attend meetups, and connect with current employees at Jagex. A friendly chat can sometimes lead to opportunities that aren’t even advertised!
✨Tip Number 2
Show off your skills! Create a portfolio or GitHub repository showcasing your mobile engineering projects. This gives us a tangible way to see what you can do and how you approach problem-solving.
✨Tip Number 3
Prepare for the interview by brushing up on your technical knowledge and soft skills. We want to see how you think and communicate, so practice explaining your past projects and decisions clearly.
✨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 to highlight your experience in mobile engineering, especially with iOS and Android. We want to see how your skills align with our needs, so don’t hold back on showcasing your relevant projects!
Showcase Your Leadership Skills: As a Principal Mobile Engineer, you'll be leading initiatives across teams. Use your application to demonstrate your past leadership experiences and how you've successfully driven technical strategies in previous roles. We love seeing examples of collaboration and impact!
Be Clear and Concise: When writing your application, keep it straightforward and to the point. We appreciate clarity, so avoid jargon and focus on what makes you a great fit for the role. Highlight your achievements and how they relate to the job description.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way to ensure your application gets into the right hands. Plus, you’ll find all the details about the role and our company culture there!
How to prepare for a job interview at Jagex: The RuneScape Company
✨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 and Android frameworks, especially Swift, Objective-C, Kotlin, and Java. Be ready to discuss how you've led large-scale initiatives and shaped mobile architecture in previous roles.
✨Demonstrate Leadership Skills
This role requires you to drive technical strategy and guide architectural decisions. Prepare examples of how you've coordinated across teams and managed dependencies in past projects. Highlight your experience in establishing engineering standards and how you've improved processes for scalable delivery.
✨Align with Company Values
Familiarise yourself with Jagex's values, such as collaboration, continuous learning, and customer focus. During the interview, weave these values into your responses to show that you're not just a fit for the role but also for the company culture. Share instances where you've embraced fellowship or honed your craft.
✨Prepare for Technical Challenges
Expect to face technical questions or challenges during the interview. Brush up on your debugging and performance optimisation skills, and be ready to solve system-level problems on the spot. Practising coding challenges related to mobile development can help you feel more confident.