Lead Simulation Engineer

Fundamental XR; 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

Job summary

Fundamental XR builds immersive training solutions for the med-tech, medical device, and life sciences sectors. We are VC-backed and maintain a unique market position while working with industry leaders.

This senior role owns the architecture, standards, and delivery of simulation-related work, from real-time XR training experiences to physics and engineering models. Reporting to the CPTO, you will lead a 4+ engineers team, guide technology choices, and raise engineering standards across the

Qualifications

• Proven experience building real-time simulation or XR systems.
• Hands-on Unity development experience required.
• Track record in technical leadership and mentoring.
• Knowledge of agentic coding and AI-assisted software engineering.
• Experience with XR platforms (VR/AR) and Quest.

Responsibilities

• Own simulation architecture and technical direction for the team.
• Lead estimation and delivery for client projects.
• Set engineering standards and improve productivity.
• Mentor a team of 4+ simulation engineers.
• Collaborate with product and design on feasible tech.
• Oversee outsourcing and team augmentation.

Skills

Unity

Real-time simulation

Technical leadership

Mentoring

Architecture design

AI-assisted tools

Tools

Unity

Unreal Engine

Codex/Claude Code

XR tooling

Job description

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