Principal UI Engineer [6 Month FTC - Remote OR Onsite]

📍 Job Overview

Job Title: Principal UI Engineer [6 Month FTC - Remote OR Onsite]

Company: Rocket Science Group

Location: London, UK (Remote or On-site)

Job Type: Full-Time (Fixed-Term Contract)

Category: Software Engineering / Game Development - UI Engineering

Date Posted: August 21, 2026

Experience Level: Principal / Senior (10+ years implied)

Remote Status: Hybrid (Remote OK within UK, or On-site in Bromley, London)

🚀 Role Summary

• Serve as the technical authority and lead architect for user interface (UI) engineering across a AAA game development studio.

• Define and establish the long-term technical vision, frameworks, patterns, and best practices for UI development at scale.

• Drive the architecture and engineering of performant, robust, and data-driven interfaces across multiple game projects.

• Remain hands-on in prototyping complex solutions and setting the standard for engineering quality through direct contribution.

• Mentor and elevate UI engineers at all levels, fostering a culture of continuous learning and technical excellence.

📝 Enhancement Note: This role is a 6-Month Fixed-Term Contract (FTC) position, indicating a need for immediate impact and specialized expertise for a defined project duration. The "Principal" title implies a senior leadership role focused on technical strategy and guidance rather than direct people management. The emphasis on "technical authority" and setting "standards" highlights the strategic and architectural nature of this position.

📈 Primary Responsibilities

• Define and evolve the studio's UI engineering architecture, technical strategy, and long-term vision, ensuring scalability and future-proofing.

• Establish and enforce UI engineering frameworks, patterns, and best practices that guide development across multiple game projects.

• Tackle the most challenging technical problems in UI implementation, collaborating closely with UI Design teams to overcome limitations and achieve desired outcomes.

• Evaluate and recommend emerging tools, technologies, and engine integrations (e.g., Unreal Engine, UMG) to enhance UI development capabilities.

• Lead by example through hands-on prototyping, code contributions, and setting the benchmark for engineering quality and performance.

• Mentor and coach UI engineers at all levels, fostering skill development, knowledge sharing, and a high-performing engineering discipline.

• Partner with Lead UI Engineers and project leadership to align technical direction and ensure seamless integration of UI systems.

• Represent UI engineering at the studio level, acting as a trusted technical voice with internal stakeholders and external partners, including platform holders and engine vendors.

• Champion accessibility standards and best practices in UI design and implementation across all projects.

📝 Enhancement Note: The responsibilities emphasize strategic technical leadership, architectural design, and hands-on problem-solving, consistent with a "Principal" level role in a complex environment like AAA game development. The focus on "multiple projects" and "studio-level" impact suggests a broad scope of influence.

🎓 Skills & Qualifications

Education: While no specific degree is mandated, a strong foundation in Computer Science principles or a related technical field is implied by the complexity of the role.

Experience: Extensive, proven UI engineering experience with a track record of shipping multiple commercial game projects. Demonstrated experience in defining UI architecture and technical strategy at scale.

Required Skills:

• Expert-level proficiency in C++, with deep professional implementation experience.

• Proven ability to define and lead UI architecture and technical strategy for large-scale projects.

• Deep practical knowledge of UI implementation, including creating reusable, performant components.

• Sound engineering judgment for making robust architectural decisions, balancing technical health and delivery needs.

• Strong mentoring and people skills, capable of elevating engineers and aligning teams technically without direct authority.

• Excellent communication and presentation skills, able to articulate complex technical ideas to diverse audiences.

• High degree of autonomy; comfortable operating with minimal supervision and making intelligent decisions with available information.

• Experience collaborating effectively with UI Design teams to translate complex designs into functional interfaces. Preferred Skills:

• Deep experience with Unreal Engine and Unreal Motion Graphics (UMG).

• Experience implementing player accessibility features and accommodating diverse player needs.

• Multi-platform and console development experience (e.g., PlayStation, Xbox, Nintendo Switch).

• Contributions to game engines or middleware development.

• Active engagement with the wider technical community (e.g., talks, articles, open-source contributions).

📝 Enhancement Note: The emphasis on C++ and Unreal Engine/UMG points towards a specific technical stack common in AAA game development. The "Principal" level requires not only deep technical expertise but also significant leadership and communication capabilities to influence technical direction and mentor other engineers.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• Demonstrable examples of complex UI architecture design and implementation, showcasing scalability and maintainability.

• Case studies detailing how you've defined and implemented UI frameworks, patterns, and best practices across projects.

• Evidence of tackling challenging UI technical problems and delivering performant, robust solutions.

• Examples of technical leadership, mentorship, or contributions that have elevated engineering teams.

• Documentation or presentation materials that clearly articulate technical vision and strategy for UI engineering. Process Documentation:

• Showcase your approach to defining and documenting UI engineering processes, including workflow optimization for design-to-implementation handoffs.

• Provide examples of how you've established and maintained engineering standards, including code review processes and quality assurance methodologies for UI.

• Illustrate your methods for evaluating and integrating new tools and technologies into existing development pipelines.

• Demonstrate experience with performance analysis and optimization techniques specific to user interfaces.

📝 Enhancement Note: For a Principal UI Engineer role, a portfolio should highlight strategic thinking, architectural prowess, and a proven ability to lead technical initiatives. It's less about individual feature implementation and more about the systems and processes that enable high-quality, scalable UI development across a studio.

💵 Compensation & Benefits

Salary Range: Based on industry benchmarks for Principal Engineers in London with extensive experience in AAA game development and C++ expertise, a competitive salary range would likely be £90,000 - £130,000 per annum. This estimate accounts for the senior leadership nature of the role, the FTC duration, and the London market.

Benefits:

• Enhanced Private Pension Scheme

• Private Medical Insurance

• Group Life Assurance

• Competitive holiday allowance with additional studio-wide closures in summer and winter.

• Gym Membership Allowance

• Free Eye Tests

• Free on-site parking (if opting for on-site work)

• Electric Car Scheme

• Season Ticket Loans (for on-site commuters)

Working Hours: Standard full-time hours are expected, likely around 40 hours per week, with the flexibility to work remotely or on-site. The contract is for 6 months.

📝 Enhancement Note: The salary estimate is based on typical compensation for Principal-level engineering roles in the UK tech/gaming sector, adjusted for the fixed-term contract nature which may sometimes include a slight premium or different benefit structure compared to permanent roles. The provided benefits are comprehensive and typical for a well-established studio.

🎯 Team & Company Context

🏢 Company Culture

Industry: Game Development (AAA Studio) - This industry is known for its fast-paced, collaborative, and often intense work environment, driven by creative passion and technical innovation.

Company Size: "AAA game development studio" implies a large organization, likely several hundred to over a thousand employees, with established processes and significant project budgets.

Founded: The company "Rocket Science Group" was founded in 2018, suggesting a relatively modern and agile organization, though the specific game studio they are partnering with is a "AAA" entity, implying a longer history and established presence.

Team Structure:

• The "Space Rangers team" is a recruitment partner, not the hiring team. The UI Engineering team within the AAA studio is likely structured with Lead UI Engineers managing specific project teams, reporting up to a Director or Head of Engineering.

• Principal UI Engineers operate at a senior technical leadership level, often dotted-line reporting to engineering leadership and working closely with multiple project teams.

• Cross-functional collaboration is critical, involving close partnerships with UI Designers, Gameplay Engineers, Technical Artists, and Project Managers. Methodology:

• Data-driven interfaces suggest a focus on user analytics, A/B testing, and performance metrics to inform UI design and engineering decisions.

• Workflow planning and optimization will be key, particularly in aligning UI design, engineering implementation, and engine integration across large teams.

• Automation and efficiency practices are paramount in AAA development to manage complexity and ensure timely delivery.

Company Website: https://www.rocketscience.gg/

📝 Enhancement Note: While Rocket Science Group is the recruiter, the role is within a "AAA game development studio." The culture and structure described are therefore inferred from the norms of such studios. The "Space Rangers" team likely acts as an intermediary, facilitating recruitment for their clients.

📈 Career & Growth Analysis

Operations Career Level: Principal Engineer. This is a senior technical individual contributor role, characterized by deep expertise, strategic influence, and mentorship responsibilities. It sits above Senior Engineer and often alongside or parallel to Engineering Manager roles, focusing on technical direction rather than people management.

Reporting Structure: This role likely reports to a Director of Engineering, Head of UI, or CTO, and will work closely with Lead UI Engineers on specific projects. The influence is studio-wide, impacting multiple teams and projects.

Operations Impact: The UI engineering function is critical for player experience, engagement, and monetization in games. A Principal UI Engineer's work directly impacts the usability, performance, and aesthetic quality of the game's interface, which is a primary touchpoint for players. Their technical decisions can significantly influence development velocity, project costs, and the overall success of game titles.

Growth Opportunities:

• Technical Specialization: Deepen expertise in advanced UI architecture, engine-specific optimizations, or emerging UI technologies.

• Technical Leadership: Transition to broader engineering leadership roles, such as Director of Engineering or Head of a specific discipline.

• Cross-Disciplinary Influence: Expand influence into areas like engine development, platform integration, or technical R&D.

• Industry Recognition: Contribute to industry standards, speak at conferences, or engage in open-source projects, enhancing personal and studio reputation.

• Mentorship Pathways: Develop formal mentorship programs and lead training initiatives for the UI engineering discipline.

📝 Enhancement Note: The "Principal" title signifies a high level of technical authority and impact. Growth opportunities focus on deepening technical expertise, broadening influence, or moving into broader leadership roles within the engineering organization.

🌐 Work Environment

Office Type: The role offers the choice between UK Remote or On-site in Bromley, London. The on-site environment at a AAA game studio is typically collaborative, dynamic, and often features specialized equipment and studios.

Office Location(s): Bromley, London, UK. This location provides access to the London tech and gaming scene.

Workspace Context:

• Collaborative Environment: Expect a highly collaborative setting, with frequent interaction with designers, artists, and other engineers.

• Tools & Technology: Access to high-end development hardware, game engines (Unreal Engine), specialized software, and potentially motion capture or VR/AR equipment depending on project needs.

• Team Interaction: Opportunities for informal knowledge sharing, pair programming, and design/technical reviews with a talented group of peers.

Work Schedule: Standard full-time hours (approx. 40/week) are expected. While remote work is an option, the on-site environment might foster more spontaneous collaboration. Given the FTC nature, a focused and efficient work schedule is anticipated.

📝 Enhancement Note: The hybrid nature of the role (remote or on-site) offers flexibility. The on-site option in Bromley provides a traditional AAA studio experience, while remote work caters to individuals preferring to work from home within the UK.

📄 Application & Portfolio Review Process

Interview Process:

• Initial Screening: A recruiter (Rocket Science Group) will likely assess your CV and initial fit against the core requirements, particularly C++ and game UI experience.

• Technical Interview(s): Expect in-depth discussions about your C++ expertise, UI architecture design principles, experience with Unreal Engine/UMG, and problem-solving capabilities. This may involve live coding or architecture design exercises.

• Portfolio Review: A dedicated session to walk through your portfolio, focusing on key projects that demonstrate your ability to define technical strategy, architect scalable UI systems, and lead complex implementations. Be prepared to discuss your role, challenges, and impact.

• Team/Leadership Interview: Conversations with Lead UI Engineers, Engineering Directors, or potentially game directors to assess your leadership style, mentoring approach, communication skills, and cultural fit within the studio.

• Final Stage: Potentially a final interview with senior leadership to confirm suitability for the FTC and strategic alignment.

Portfolio Review Tips:

• Curate Selectively: Focus on 2-3 of your most impactful projects that best showcase your Principal-level contributions to UI architecture and technical leadership.

• Structure Your Narrative: For each project, clearly outline the problem, your proposed solution (architecture, patterns), the technical challenges, your specific contributions, the outcome (metrics, impact), and lessons learned.

• Emphasize Strategy: Highlight how you defined the technical vision, set standards, and influenced the engineering direction, rather than just listing features.

• Technical Depth: Be ready to dive deep into C++ implementation details, performance considerations, and architectural trade-offs.

• Mentorship Examples: Include any examples of how you've mentored junior engineers or improved team capabilities.

Challenge Preparation:

• Architecture Design: Practice designing scalable and performant UI systems for hypothetical games, considering cross-platform constraints and accessibility.

• Problem-Solving Scenarios: Prepare for questions that involve debugging complex UI issues, optimizing performance bottlenecks, or integrating new technologies.

• Technical Communication: Rehearse explaining complex technical concepts and architectural decisions clearly and concisely, as you'll need to communicate with both technical and non-technical stakeholders.

📝 Enhancement Note: The interview process for a Principal role will be rigorous, focusing heavily on strategic thinking, architectural expertise, and leadership potential. A well-prepared portfolio that clearly articulates impact and technical vision is crucial.

🛠 Tools & Technology Stack

Primary Tools:

• C++: The core programming language for engine development and core systems.

• Unreal Engine: The primary game engine, likely at a recent version.

• Unreal Motion Graphics (UMG): The native UI framework within Unreal Engine, crucial for visual UI creation and logic.

• Version Control Systems: Git (likely via Perforce or GitHub Enterprise for game dev).

Analytics & Reporting:

• Internal Analytics Tools: Custom studio tools for tracking UI performance, player engagement, and feature usage.

• Profiling Tools: Unreal Engine's built-in profiling tools (e.g., Slate/UMG profiler) and potentially third-party performance analysis software.

CRM & Automation:

• Project Management Software: Jira, Asana, or similar for task tracking and workflow management.

• Collaboration Platforms: Slack, Microsoft Teams, Discord for team communication.

• CI/CD Pipelines: Potentially custom pipelines for automated builds and testing of UI assets and code.

📝 Enhancement Note: Proficiency with C++ and Unreal Engine's UI systems (UMG) is non-negotiable. Familiarity with version control and project management tools common in large game studios is also expected. The role may involve evaluating and integrating new tools for performance analysis and development efficiency.

👥 Team Culture & Values

Operations Values:

• Technical Excellence: A drive for high-quality, performant, and robust engineering solutions.

• Collaboration: Strong emphasis on cross-functional teamwork and open communication between design, engineering, and production.

• Innovation: Encouraging exploration of new technologies and approaches to enhance gameplay and player experience.

• Player Focus: A commitment to delivering exceptional player experiences through intuitive and engaging interfaces.

• Continuous Improvement: A culture that values learning, feedback, and iterative refinement of processes and technology.

Collaboration Style:

• Partnership-Oriented: Working closely with UI Designers to translate creative vision into functional reality, respecting both artistic and technical domains.

• Cross-Functional Integration: Seamless integration with gameplay programming, art, and QA teams to ensure cohesive game development.

• Knowledge Sharing: Active participation in code reviews, technical discussions, and internal presentations to spread best practices and foster collective growth.

• Feedback-Driven: Openness to constructive criticism and a proactive approach to seeking and providing feedback.

📝 Enhancement Note: AAA game studios typically foster a culture of passion, dedication, and collaboration. For a Principal Engineer, demonstrating strong communication, mentorship, and a collaborative spirit is as important as technical prowess.

⚡ Challenges & Growth Opportunities

Challenges:

• Technical Complexity: Managing the intricate demands of UI engineering for AAA games, often involving real-time rendering, complex data binding, and performance optimization under tight constraints.

• Cross-Project Alignment: Ensuring consistent UI architecture and quality across multiple, potentially disparate, game projects with varying timelines and technical requirements.

• Balancing Innovation and Delivery: Integrating cutting-edge UI technologies while meeting strict project deadlines and budget requirements.

• Mentorship at Scale: Effectively mentoring a diverse group of engineers with varying skill levels and backgrounds across studio-wide initiatives.

• Keeping Pace with Technology: Continuously adapting to evolving game engine capabilities, platform requirements, and UI best practices.

Learning & Development Opportunities:

• Advanced Engine Features: Deep dive into Unreal Engine's latest features, rendering pipelines, and performance optimization techniques relevant to UI.

• Industry Conferences: Opportunities to attend or present at major game development conferences (e.g., GDC, SIGGRAPH) to stay abreast of industry trends and network.

• Specialized Training: Access to training on specific tools, accessibility standards, or advanced programming paradigms.

• Leadership Development: Formal or informal opportunities to hone leadership, strategic planning, and stakeholder management skills.

• Cross-Discipline Exposure: Gaining insights into other areas of game development, such as engine architecture, graphics programming, or AI.

📝 Enhancement Note: The challenges in this role stem from the scale and complexity of AAA game development. Growth opportunities are geared towards deepening technical expertise, expanding strategic influence, and developing leadership capabilities within the gaming industry.

💡 Interview Preparation

Strategy Questions:

• "How would you define the technical strategy for UI engineering across a studio developing multiple AAA titles simultaneously?" (Focus on architecture, patterns, scalability, and cross-team collaboration.)

• "Describe a time you had to make a significant architectural decision for a UI system with incomplete information. What was your process, and what was the outcome?" (Highlight decision-making, risk assessment, and technical judgment.)

• "How do you approach mentoring engineers to improve their UI architecture skills and overall engineering quality?" (Discuss your mentoring philosophy, methods, and examples of impact.)

• "Imagine a core UI feature is causing significant performance degradation on target consoles. How would you diagnose and address this issue?" (Detail your debugging methodology, profiling tools, and optimization strategies.) Company & Culture Questions:

• "What are your thoughts on the current state of UI in AAA games, and where do you see the biggest opportunities for innovation?" (Showcase your industry awareness and forward-thinking perspective.)

• "How would you foster a collaborative relationship between UI Design and UI Engineering teams to ensure efficient and high-quality UI development?" (Emphasize communication, empathy, and process alignment.)

• "How do you measure the success of UI engineering initiatives beyond just feature delivery?" (Discuss metrics like performance, scalability, maintainability, and player satisfaction.) Portfolio Presentation Strategy:

• Context is Key: Start each project with a clear understanding of the game, its target audience, and the specific UI challenges.

• Show, Don't Just Tell: Use visuals (screenshots, short videos) to illustrate your designs and implementations.

• Focus on Impact: Quantify your contributions whenever possible (e.g., "improved load times by X%", "reduced bug reports by Y%").

• Technical Deep Dive: Be prepared to discuss the C++ code, architectural patterns, and performance considerations in detail.

• Your Role as a Leader: Clearly articulate your contributions as a technical authority, architect, and mentor.

📝 Enhancement Note: Preparation should focus on demonstrating strategic technical leadership, deep C++ and Unreal Engine UI expertise, strong problem-solving skills, and effective communication/mentorship abilities. Your portfolio should be the centerpiece, showcasing your ability to drive technical excellence at a principal level.

📌 Application Steps

To apply for this operations position:

• Submit your application through the provided Ashby link.

• Customize Your Resume: Tailor your resume to highlight your extensive C++ experience, specific achievements in shipping commercial game projects, and any experience defining UI architecture or technical strategy. Use keywords from the job description.

• Prepare Your Portfolio: Curate 2-3 key projects that best demonstrate your Principal-level contributions to UI architecture, technical leadership, and problem-solving. Ensure it clearly communicates your impact and strategic thinking.

• Practice Your Pitch: Rehearse explaining your portfolio projects, focusing on the "why," "how," and "what" of your contributions, especially regarding technical vision and leadership.

• Research the Studio: Familiarize yourself with the AAA studio's games and any public information available about their technical approach or culture to tailor your responses and demonstrate genuine interest.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and operations industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.