Lead Simulation Engineer

Fundamentalxr; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Benefits offered by this job

Private healthcare with AXA

Modern office in Central London

Work-from-home budget

25 days holiday + bank holidays

Perks package

Job summary

Fundamental XR in London is seeking a Lead Simulation Engineer to own the architecture and delivery of our real-time XR simulations. You will lead a 4+ engineer team, shape technical direction, and drive reusable components across training and physics models.

You will mentor engineers, raise engineering standards, and work with product/design on feasible solutions while balancing fast delivery with long-term strategy. This role is hybrid in London.

Qualifications

• Proven experience building real-time simulation or XR systems in Unity, including creating and delivering major architecture strategies.
• Strong hands-on Unity experience essential; experience with Unreal and scalable architectures is an advantage.
• Track record of technical leadership, mentoring, and managing team performance.
• Knowledge of agentic coding tools (Codex, Claude Code) and other AI-assisted software engineering methods.
• Experience with Meta Quest (Horizon OS) and other XR platforms across VR, MR and Web.

Responsibilities

• Own technical direction for Simulation, leading the Simulation team of 4+ engineers.
• Architect scalable, real-time simulation systems and reusable components across XR/VR training and physics models.
• Lead estimation and delivery of client work, balancing short-term delivery with long-term technology strategy.
• Set engineering standards for simulation code, ensuring performance, accuracy and maintainability.
• Mentor and manage the 4+ simulation engineers, including performance reviews and outsourcing coordination.
• Define the shared code roadmap and promote agentic coding practices for productivity improvements.

Skills

Unity

Real-time simulation

Technical leadership

Architecture design

Mentoring team

Team management

Tools

Unreal Engine

Job description

Lead Simulation Engineer

London (Hybrid)

About Us

Fundamental XR builds immersive training solutions for the med-tech, medical device, and life sciences industries. We're VC-backed and our market position is unique.

We work with some of the biggest names in the industry: Philips, Johnson & Johnson, AbbVie, Abiomed, Novartis, Orbis International, among others.

This is a senior technical leadership role at the heart of our engineering organisation, owning the architecture, standards, and delivery of everything simulation-related, from real-time XR training experiences to physics and engineering modeling.

The Role

Reports to the CPTO and is directly responsible for all Simulation technologies, managing a team of 4+ engineers.

• Owning technical direction for Simulation. Take full responsibility for technical direction, project implementation, and team leadership across the Simulation team.

• Architecture for scalable, real-time simulation systems. Design the architecture for scalable, real-time simulation systems. Lead development of reusable components shared across XR/VR training and physics-based engineering models, and own technology-stack decisions for the simulation layer.

• Lead estimation and delivery of client work. Design solutions for client projects and oversee their implementation, advising product and design on what is technically feasible. Weigh near-term delivery needs against long‑term technology strategy when making technology choices.

• Raise the bar for engineering standards. Set technical direction and standards for simulation code, with particular attention to performance, accuracy, and maintainability. Raise engineering practice across all of Engineering, accelerating adoption of modern engineering practices, and leading through example among peers.

• Lead and mentor the team. Manage and mentor a team of 4+ simulation engineers, owning performance management plans for all direct reports. Oversee work from team augmentation and outsourcing partners.

• Own developer productivity. Set the roadmap for the shared code, common ways of working, and for the metrics that measure productivity. Accelerate the adoption and efficacy of agentic coding techniques and agentic delivery. Deliver measurable improvements within three months.

Who we think will be successful in this role

• Proven experience building real‑time simulation or XR systems in Unity, including creating and delivering major architecture strategies.

• Strong hands‑on Unity experience is essential. Experience with other engines (e.g. Unreal) and scalable application architectures is an advantage.

• A track record of technical leadership, mentoring, and managing team performance.

• Current knowledge of agentic coding (Codex, Claude Code) and other AI‑assisted tools and methods for software engineering, simulation creation and asset generation.

• Experience with Meta Quest (Horizon OS) and comparable XR platforms across VR, Mixed Reality and Web.

Nice to have

• Experience with data‑powered digital twinning technologies and techniques.

• Domain experience in training/simulation for industry (rather than strictly gaming) applications.

• Performance profiling experience on constrained hardware (mobile/standalone XR).

• Prior experience leading teams in high‑performance environments.

What We Offer

• Private healthcare with AXA

• A fully serviced, modern office in Central London

• Work‑from‑home budget to build a setup that works for you

• 25 days holiday + bank holidays, increasing 1 day per year up to 30 days

• A perks package