Latest PhysicsX Jobs

Senior CFD Engineer - Multiphase

About us PhysicsX is a deep-tech company with roots in numerical physics and Formula One, dedicated to accelerating hardware innovation at the speed of software. We are building an AI-driven simulation software stack for engineering and manufacturing across advanced industries....

PhysicsX London, United Kingdom

Principal Agentic Engineer

This role involves architecting and leading the development of a production-grade agentic AI platform that integrates with engineering simulation workflows. The engineer will design secure, observable, and scalable agent systems, enabling domain experts to build and evaluate advanced AI-driven solutions for high-fidelity engineering problems. The position emphasizes robust infrastructure, developer experience, and responsible AI deployment in an enterprise context.

PhysicsX London, United Kingdom

Hybrid Permanent

Developer Technology Engineer, Energy

This role involves optimizing GPU-accelerated applications for energy simulation and AI workflows, focusing on CUDA performance, memory management, and multi-GPU scaling. You will work closely with customers, partners, and internal teams to deliver significant performance improvements and develop reference implementations.

NVIDIA

Remote Permanent

Senior Quantum Algorithm Researcher

As a Senior Quantum Algorithm Researcher, you will lead technical collaborations with supercomputing centers and industry partners to develop hybrid quantum-classical applications. Your role involves driving research in AI for quantum algorithms, contributing to strategic projects, and publishing impactful research while representing NVIDIA at conferences.

NVIDIA United Kingdom

Remote Permanent

Graduate Electronic Systems Engineer (2026 start)

This role involves working on diverse product and system developments across various industries, from consumer devices to aerospace. You will collaborate with a multidisciplinary team, design and implement electronic systems, and gain hands-on experience in hardware, software, and system-level design.

Cambridge Consultants United Kingdom

On-site Permanent

Principal Digital Signal Processing Engineer

This role involves designing and developing advanced digital signal processing systems for US Government applications, focusing on wireless communications, sensors, audio, and image processing. You will work on cutting-edge projects, from proof-of-concept demonstrations to product development, and contribute to the team's growth and innovation.

Cambridge Consultants United Kingdom

On-site Permanent Clearance Required

Research Engineer, RL Scaling Science

This role involves designing and running large-scale reinforcement learning experiments to understand scaling effects across model size, compute, and task horizon. The engineer will build benchmarks for long-horizon RL, debug system-level issues at the research-infrastructure boundary, and translate validated findings into production training recipes. Work is highly collaborative, sitting at the intersection of empirical research and large-scale systems engineering.

Anthropic London, United Kingdom £375,000 – £640,000 pa

Hybrid Permanent

Applied AI Security Architect

This role involves serving as a trusted security expert for Anthropic's enterprise customers, engaging with CISOs and security leaders to address critical security and compliance questions. You will lead technical discussions on data protection, network architecture, and regulatory standards, and collaborate with internal teams to influence product development and create security-focused materials.

Anthropic London, United Kingdom

On-site Permanent

Research Engineer, Machine Learning (Reinforcement Learning)

This role involves collaborating with researchers and engineers to advance the capabilities and safety of large language models through reinforcement learning. Responsibilities include developing core RL infrastructure, designing novel training environments, and optimizing performance across the stack.

Anthropic London, United Kingdom

On-site Permanent

Research Engineer, Machine Learning (RL Velocity)

As a Research Engineer on the RL Velocity team, you will focus on building and improving the RL training infrastructure, identifying and removing bottlenecks, and partnering with researchers and engineering teams to enhance the efficiency and reliability of Anthropic's AI systems. This role involves high-leverage work that impacts the entire organization's ability to iterate and improve models quickly.

Anthropic London, United Kingdom £370,000 – £630,000 pa

Hybrid Permanent

Research Engineer, Pretraining

This role involves conducting research and implementing solutions in areas like model architecture, algorithms, and data processing for large language models. You will lead small projects, collaborate on larger initiatives, and optimize training infrastructure to ensure AI systems are safe, steerable, and trustworthy.

Anthropic London, United Kingdom

On-site Permanent

Research Engineer, Pretraining Scaling - London

This role involves owning critical aspects of Anthropic's production pretraining pipeline, including performance optimization, debugging complex issues, and improving training efficiency. The position is highly operational, requiring responsiveness to incidents and flexibility during model launches, with significant learning opportunities.

Anthropic London, United Kingdom

On-site Permanent

[Expression of Interest] Research Engineer / Scientist, Alignment - London

As a Research Engineer on the Alignment Science team, you will design and execute machine learning experiments to ensure AI systems are safe, helpful, and aligned with human values. You will collaborate with other teams to test and improve safety techniques, develop evaluation tools, and contribute to research papers and presentations.

Anthropic London, United Kingdom £260,000 – £370,000 pa

Hybrid Permanent

Staff Software Engineer, AI Reliability Engineering

This role involves developing and maintaining the reliability of Anthropic's AI systems, particularly Claude. Responsibilities include setting service level objectives, implementing monitoring systems, and leading incident response. The position offers cross-functional exposure and collaboration across multiple teams and cloud providers.

Anthropic London, United Kingdom £325,000 – £390,000 pa

Permanent

Staff Software Engineer, Inference

As a Staff Software Engineer on the Inference team, you will work on building and maintaining critical systems that serve Claude to millions of users. Your responsibilities will include optimizing compute efficiency, enabling breakthrough AI research, and tackling complex distributed systems challenges across multiple cloud platforms and AI accelerators.

Anthropic London, United Kingdom £325,000 – £390,000 pa

Hybrid Permanent