1 to 25 of 26 Performance Engineer Jobs in London

BROADBEAN_699821790776534Location: London, Greater LondonContract: ContractIndustry: TelecommunicationsRecruiter: Swati MylavarapuE-Mail: swati.mylavarapu.69982.9115@adeccops.aplitrak.comSenior 5G RAN Performance Engineer ð London or Bristol (Hybrid) | ð 12 Months | Inside IR35Our client, a leading telecommunications organisation is looking for an experienced Senior 5G RAN Performance Engineer to support a major mobile … network programme. This role will focus on the performance and optimisation of 5G networks, with particular emphasis on 5G SA, VoNR, KPI analysis, OSS platforms and network performance improvement. Key ResponsibilitiesAnalyse and optimise 5G network performance across live network environments. Monitor and improve accessibility, retainability, mobility, integrity ...

Lead Performance Test Engineer ( SC Eligible/SC Cleared ) London, United Kingdom | Posted on 01/09/2026 Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over … commitment to user-centred design and agile delivery, and more to deliver innovative digital services that matter. Role Overview We are seeking a Lead Performance Tester/Performance Engineering Lead to provide end-to-end ownership of performance testing and performance assurance across complex digital services. ...

Date: 24 Sept 2026 Company: QualityAI Country/Region: GB Performance Test Engineer Location: London or Leeds, UK (Hybrid) Type: Permanent Salary Band : Grade B2 Role Overview We are looking for a Performance Test Engineer to drive performance assurance across cloud, hybrid, and on-premise … environments. You will design and execute performance, load, stress, and volume tests, identify bottlenecks, and work closely with development and architecture teams to ensure scalable, resilient, and high-performing applications. Key Responsibilities Design and execute performance testing strategies and test plans. Perform load, stress, endurance, and volume testing. ...

Capital on Tap is hiring its first dedicated Database Performance Engineer to own performance and scale of our SQL Server estate on Azure, ensuring fast paths stay fast as volume grows. You’ll join a small, agile team of DBAs and SREs, focusing on latency, cost … reliability rather than ticket queues. You’ll optimize queries, enable horizontal scaling, and build self-serve tooling for developers to diagnose performance issues, while championing HA/DR and infrastructure as code across the #J-18808-Ljbffr ...

Capital on Tap is seeking a Database Performance Engineer to own performance and scale of our SQL Server estate on Azure. You will join a small, senior, hands‐on team of DBAs and SREs to optimize latency, cost and reliability. You'll own performance tuning ...

Capital on Tap in London seeks a Database Performance Engineer to own performance and scale. You will join a small, agile team and focus on reducing latency, cost and improving reliability across our SQL Server estate on Azure. Lead the design of HA/DR, build self ...

Senior GPU Performance Software Engineer, AI/ML Share Senior GPU Performance Software Engineer, AI/ML corporate_fare Google place London, UK info_outline info_outline X In most instances, this position requires in-person interviews as part of the hiring process. Bachelor’s degree … Science or a related technical field. 1 year of experience in a technical leadership role. Experience with hardware/compiler co-design or high-performance computing (HPC). Experience in performance analysis and debugging, improving performance of single-node or multi-node (distributed) systems. Experience ...

Hamilton Barnes Associates Limited is seeking a Cloud Performance Engineer to design and optimise high-performance cloud infrastructure for latency-sensitive workloads across AWS and hybrid environments. You will collaborate with cross-functional teams spanning cloud, networking, Linux, and automation to push performance and reliability. Ideal ...

inclusive work environment; we back each other to deliver impact. Make Wayve the experience that defines your career! The role As a Staff ML Performance Engineer, you’ll play a key role in high-impact projects, optimising ML inference for edge accelerators and GPUs. The focus of this … execution, memory movement) and deliver measurable improvements. Implement and validate optimisations in compilers, runtimes, and/or kernels (e.g. operator fusion, scheduling, quantisation‐aware performance, custom kernels). Build robust benchmarking and regression testing to ensure performance improvements hold across models, devices, and software releases. Optimise for multiple ...

Research is seeking an exceptional NLP Performance Engineer to own large-scale LLM inference performance within our NLP Engineering team at the London HQ. You will profile, optimise and implement techniques to maximise inference throughput and cost-efficiency, collaborating with researchers and infrastructure engineers to shape scalable ...

apply large language models (LLMs) and other Natural Language Processing (NLP) techniques across the firm. We are looking for an exceptional NLP Performance Engineer to join our NLP Engineering team and take ownership of large-scale LLM inference performance. This is a specialist Quantitative Developer role. Like … Quantitative Developers, you will work alongside researchers to bring their ideas to life, with a particular focus on maximising the performance of LLMs. This is a hands‐on, high‐impact role. You will design and implement techniques that improve the performance, cost‐efficiency and capabilities of inference workloads ...

apply large language models (LLMs) and other Natural Language Processing (NLP) techniques across the firm. We are looking for an exceptional NLP Performance Engineer to join our NLP Engineering team and take ownership of large-scale LLM inference performance. This is a specialist Quantitative Developer role. Like … Quantitative Developers, you will work alongside researchers to bring their ideas to life, with a particular focus on maximising the performance of LLMs. This is a hands-on, high-impact role. You will design and implement techniques that improve the performance, cost-efficiency and capabilities of inference workloads ...

Scrumconnect Consulting is seeking a Lead Performance Tester/Performance Engineering Lead to own performance testing strategy across complex digital services. You will act as the performance authority, defining strategy, leading delivery, and advising on production readiness. We expect extensive experience in performance testing ...

Google LLC is seeking a Senior GPU Performance Software Engineer, AI/ML, to join the ML-Omega team in London. You will help optimize, model, and evaluate GPU systems for benchmarking Google's internal ML workloads and for guiding future Cloud hardware decisions. The role requires deep … experience with ML algorithms, GPU programming, performance analysis, and collaboration with product teams to solve large-scale model performance challenges. #J-18808-Ljbffr ...

QualityAI is seeking a Performance Test Engineer to drive performance assurance for cloud, hybrid, and on-premise environments in London or Leeds. You will design tests, execute load and stress scenarios, and work with dev and architecture teams to ensure scalable and resilient applications. The role emphasizes ...

Join our Market Making tech team to design and optimise low-latency trading systems, with direct impact on performance, reliability, and scale. We are looking for experienced C++ engineers focused on building high-performance, low-latency systems . You will work across the trading stack, from exchange connectivity … core system components, solving real-time performance challenges and improving system efficiency. The role combines performance optimisation across CPU, memory, and networking with large-scale system design in an environment where code runs directly in production. You will take ownership of critical components, iterate quickly, and deliver production ...

Advert Job Title: 4G/5G RAN Performance & Optimisation Expert (ESN) Duration: 06 months with possibility of extension Location: London-Hybrid Why This Role Matters Join us and play a critical role in maintaining our position as a leading UK mobile network and driving our vision … Mobile RAN strategy and ensuring a flawless subscriber experience-particularly for the highly critical Emergency Services Network (ESN). What You'll Be Doing Performance Leadership: Drive 4G/5G ESN performance management, define SLAs/KPIs, and build action plans for continuous performance uplift. RAN Optimisation ...

maintain Large Language Model (LLM) training and serving benchmarks that are representative of Google production, industry, and the ML community, using them to identify performance opportunities, drive Accelerated Linear Algebra (XLA) Graphics Processing Unit (GPU)/Triton performance, and guide XLA releases. Engage with Google product teams like … DeepMind to solve their ML model performance problems, such as onboarding new LLM models and products on GPU hardware and enabling LLMs to train and serve efficiently at a very large scale. Run architecture-level simulations on GPU designs and perform roofline analysis to guide internal teams. Analyze performance ...

tech company focusing on AI hardware is seeking an embedded software engineer in London or Bristol to optimize performance-critical ML kernels and develop low-level control paths. The role requires 3+ years of experience in embedded software, strong skills in C and assembly, and a collaborative mindset. … will profile and benchmark for performance improvements, working closely with hardware and software engineers. This position encourages fast-paced development with a focus on maintaining high-quality code. #J-18808-Ljbffr ...

Quant Blueprint LLC is seeking an engineer proficient in low-level systems programming and optimization to enhance our machine learning team. This role centers on optimizing model performance, both for training and real-time inference. Applicants should have experience with modern ML techniques, GPU knowledge, and debugging skills ...

looking for an engineer with experience in low-level systems programming and optimisation to join our growing ML team. Machine learning is a critical pillar of Jane Street's global business. Our ever-evolving trading environment serves as a unique, rapid-feedback platform for ML experimentation, allowing … incorporate new ideas with relatively little friction. Your part here is optimising the performance of our models – both training and inference. We care about efficient large-scale training, low-latency inference in real-time systems and high-throughput inference in research. Part of this is improving straightforward CUDA ...

Luma is seeking an expert GPU optimization engineer to accelerate multimodal transformer workloads. You will profile, tune, and deploy kernel- and operator-level improvements across GPUs, CPUs, and accelerators to maximize training throughput and minimize latency. You will implement fused kernels, leverage tensor cores, and push Triton/CUDA … capabilities, while collaborating on distributed multi-node deployment and performance instrumentation. #J-18808-Ljbffr ...

seeking experienced C++ engineers to join our Market Making tech team. You will design and optimise low-latency trading systems with direct impact on performance, reliability, and scale. You will own critical components across the trading stack, from exchange connectivity to core infrastructure, solving real-time challenges and delivering ...

Aquis Exchange in London is seeking a Development Engineer to help deliver high performance, low latency software for global markets. You will work with Product, Infrastructure and QA teams to design, implement and test scalable components that handle large TPS and reliability. The role requires strong C++ (C++11+ ...

leading technology company in the United Kingdom is seeking a GPU Performance Analysis Engineer. This role focuses on developing and validating performance test plans for GPUs, analyzing performance issues, and collaborating with engineers to identify solutions. The ideal candidate will have strong skills in hardware and software … debugging, data analysis, and knowledge of programming languages like Python or C++. Join to influence performance across various products in a high visibility role. #J-18808-Ljbffr ...