1 to 25 of 92 Permanent Performance Engineering Jobs in the UK excluding London

Head of Performance & Reliability Engineering Full-Time - Hybrid (3 days in Cambridgeshire) Up to £95,000 + Bonus This is an exceptional opportunity to join a major organisation at a pivotal stage in their digital transformation. As Head of Performance & Reliability Engineering You'll shape strategy, lead performance testing and chaos engineering initiatives, and … embed reliability best practices across engineering, DevOps, and infrastructure teams. This is a senior, strategic leadership role focused on system excellence, observability, and continuous improvement. Ideal Candidate: Proven experience leading Performance Engineering, Reliability, or SRE functions Deep expertise in performance testing methodologies (load, stress, spike, soak) Strong hands-on background with LoadRunner and Dynatrace (plus tools … such as NeoLoad, k6, or JMeter) Skilled in chaos engineering , resilience testing , and system scalability Experience defining and managing SLOs, SLIs, and error budgets Strong knowledge of distributed systems , cloud platforms (AWS, Azure, or GCP), and microservice architectures Proven ability to influence senior stakeholders and embed performance and reliability into the SDLC Inspirational leader with experience building, mentoring More ❯

Performance Test Engineer (Python Automation for large-scale, low-latency, distributed VoD/Avod streaming video systems) Remote Europe/UK Location: Remote (Europe & UK only) Full-Time | 6-Month Contract | Start Date: within 1-2 weeks 325-350pd IR35 Outside TBC Were seeking a hands-on Performance Test Engineer/Performance Tester with Strong Python … and automation expertise to design, build, and execute the performance testing strategy for a high-scale, ad-serving platform built on Akka-based Java microservices. Ideally Required to build automated load frameworks using Locust (Python). Its important to the end client that suitable candidates have solid experience in the streaming domain and with issues related to handling millions … of concurrent users, and that they are strongly focused on performance testing (rather than focussed on other testing areas such as automation. Youll work closely with developers and DevOps engineers to simulate realistic traffic at scale, ensure sub-50ms latency under millions of concurrent users, and drive system optimizations across cloud infrastructure and code. This is a technical, high More ❯

Head of Performance & Reliability EngineeringFull-Time - Hybrid (3 days in Cambridgeshire) Up to £95,000 + Bonus This is an exceptional opportunity to join a major organisation at a pivotal stage in their digital transformation. As Head of Performance & Reliability Engineering You'll shape strategy, lead performance testing and chaos engineering initiatives, and embed reliability … best practices across engineering, DevOps, and infrastructure teams. This is a senior, strategic leadership role focused on system excellence, observability, and continuous improvement. Ideal Candidate: Proven experience leading Performance Engineering, Reliability, or SRE functions Deep expertise in performance testing methodologies (load, stress, spike, soak) Strong hands-on background with LoadRunner and Dynatrace (plus tools such as … NeoLoad, k6, or JMeter) Skilled in chaos engineering , resilience testing , and system scalability Experience defining and managing SLOs, SLIs, and error budgets Strong knowledge of distributed systems , cloud platforms (AWS, Azure, or GCP), and microservice architectures Proven ability to influence senior stakeholders and embed performance and reliability into the SDLC Inspirational leader with experience building, mentoring, and enabling More ❯

Performance & Reliability Manager – Software House – Peterborough/Hybrid The information below covers the role requirements, expected candidate experience, and accompanying qualifications. (Key skills: Performance Engineering, Reliability Engineering, SRE, Load Testing, Observability, Chaos Testing, Cloud Platforms, Microservices, Leadership, CI/CD, APM Tools) Are you a technology leader passionate about driving performance, scalability, and reliability across … complex software platforms? Do you thrive in high-growth environments where innovation, engineering excellence, and resilience are core values? If so, this is a rare opportunity to define the performance strategy for a fast-moving, product-focused software house. Our client, a leading Software House based in Peterborough, is seeking a Performance & Reliability Manager to lead its … global performance and reliability initiatives. This role offers the chance to shape the technical vision for scalable, high-performing systems that underpin enterprise-grade software solutions used by clients worldwide. As Performance & Reliability Manager, you'll lead cross-functional teams across development, DevOps, and infrastructure, embedding performance and resilience best practices throughout the software lifecycle. You'll More ❯

Performance & Reliability Director - Software House - Peterborough/Hybrid (Key skills: Performance Engineering, Reliability Engineering, SRE, Load Testing, Observability, Chaos Testing, Cloud Platforms, Microservices, Leadership, CI/CD, APM Tools) Are you a technology leader passionate about driving performance, scalability, and reliability across complex software platforms? Do you thrive in high-growth environments where innovation, engineering excellence, and resilience are core values? If so, this is a rare opportunity to define the performance strategy for a fast-moving, product-focused software house. Our client, a leading Software House based in Peterborough, is seeking a Performance & Reliability Director to lead its global performance and reliability initiatives. This role offers the chance to shape … the technical vision for scalable, high-performing systems that underpin enterprise-grade software solutions used by clients worldwide. As Performance & Reliability Director, you'll lead cross-functional teams across development, DevOps, and infrastructure, embedding performance and resilience best practices throughout the software lifecycle. You'll oversee system profiling, capacity planning, and test strategies - ensuring every release meets the More ❯

Software Engineer London, UK 85,000 basic plus bonus Were looking for a Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. Youll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal memory usage, and rock … youll dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What youll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What were looking for Solid experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance tuning in large-scale More ❯

Software Engineer London, UK 85,000 basic plus bonus Were looking for a Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. Youll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal memory usage, and rock … youll dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What youll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What were looking for Solid experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance tuning in large-scale More ❯

Software Engineering Manager – £90k + Progression to COO | Basingstoke | Hybrid (3 Days Onsite) We’re hiring on behalf of our client for a strategic and delivery-focused Software Engineering Manager to lead a growing development organisation in Basingstoke. This is a brand-new leadership role with a clear path to COO-level progression , offering the chance to shape … engineering direction, culture, and performance from the ground up.You’ll oversee global teams across Development, Testing, DevOps, and BAU Support, driving technical excellence, delivery discipline, and people-first leadership. Working closely with Product, Sales, and Customer Delivery, you’ll ensure engineering is aligned with business goals and release cycles. Key Responsibilities: Lead and scale high-performing engineering teams Own technical architecture, code quality, and system resilience Champion engineering standards and governance in regulated environments Drive delivery across Agile, Waterfall, and hybrid methodologies Collaborate cross-functionally to support pre-sales, implementation, and support Shape a high-trust, high-performance engineering culture What We’re Looking For: 10+ years in software engineering, 5+ in More ❯

Junior Software Engineer London, UK 85,000 basic plus bonus Were looking for a Junior Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. Youll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal memory usage … youll dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What youll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What were looking for A few years commercial experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance tuning More ❯

Software Engineering Manager – £90k + Progression to COO | Basingstoke | Hybrid (3 Days Onsite) We’re hiring on behalf of our client for a strategic and delivery-focused Software Engineering Manager to lead a growing development organisation in Basingstoke. This is a brand-new leadership role with a clear path to COO-level progression , offering the chance to shape … engineering direction, culture, and performance from the ground up. You’ll oversee global teams across Development, Testing, DevOps, and BAU Support, driving technical excellence, delivery discipline, and people-first leadership. Working closely with Product, Sales, and Customer Delivery, you’ll ensure engineering is aligned with business goals and release cycles. Key Responsibilities: Lead and scale high-performing … engineering teams Own technical architecture, code quality, and system resilience Champion engineering standards and governance in regulated environments Drive delivery across Agile, Waterfall, and hybrid methodologies Collaborate cross-functionally to support pre-sales, implementation, and support Shape a high-trust, high-performance engineering culture What We’re Looking For: 10+ years in software engineering, 5+ More ❯

Ultra-Low Latency C++ Engineer | High-Frequency Trading Salary: £150k-£225k Total compensation: £250k-500k depending on performance and seniority A leading quant/systematic trading firm have multiple headcount for Ultra-Low Latency C++ Engineers to join their High-Frequency Trading team in London. The teams focus is building ultra-low-latency systems operating at global scale. They … re seeking experienced C++ engineers passionate about performance optimization and elegant system design where nanoseconds matter! What You'll Do: Design and optimize latency-critical C++ systems across trading, market data, and infrastructure components Performance engineering at every layer: CPU, cache, memory, and network Profile, benchmark, and fine-tune system behaviour under real-world conditions Collaborate with … hardware and FPGA engineers on end-to-end architecture design Kernel-level optimization and low-level systems tuning Required: 5+ years developing performance-critical C++ applications (modern C++ standards) Strong systems programming and low-level understanding Expertise in Linux internals, kernel tuning, and low-level profiling tools Genuine curiosity about hardware behaviour, networking, and system optimization Why Join: Work More ❯

Ultra-Low Latency C++ Engineer | High-Frequency Trading Salary: £150k-£225k Total compensation: £250k-500k depending on performance and seniority A leading quant/systematic trading firm have multiple headcount for Ultra-Low Latency C++ Engineers to join their High-Frequency Trading team in London. The teams focus is building ultra-low-latency systems operating at global scale. They … re seeking experienced C++ engineers passionate about performance optimization and elegant system design where nanoseconds matter! What You'll Do: Design and optimize latency-critical C++ systems across trading, market data, and infrastructure components Performance engineering at every layer: CPU, cache, memory, and network Profile, benchmark, and fine-tune system behaviour under real-world conditions Collaborate with … hardware and FPGA engineers on end-to-end architecture design Kernel-level optimization and low-level systems tuning Required: 5+ years developing performance-critical C++ applications (modern C++ standards) Strong systems programming and low-level understanding Expertise in Linux internals, kernel tuning, and low-level profiling tools Genuine curiosity about hardware behaviour, networking, and system optimization Why Join: Work More ❯

Ultra-Low Latency C++ Engineer | High-Frequency Trading Salary: £150k-£225k Total compensation: £250k-500k depending on performance and seniority A leading quant/systematic trading firm have multiple headcount for Ultra-Low Latency C++ Engineers to join their High-Frequency Trading team in London. The teams focus is building ultra-low-latency systems operating at global scale. They … re seeking experienced C++ engineers passionate about performance optimization and elegant system design where nanoseconds matter! What You'll Do: Design and optimize latency-critical C++ systems across trading, market data, and infrastructure components Performance engineering at every layer: CPU, cache, memory, and network Profile, benchmark, and fine-tune system behaviour under real-world conditions Collaborate with … hardware and FPGA engineers on end-to-end architecture design Kernel-level optimization and low-level systems tuning Required: 5+ years developing performance-critical C++ applications (modern C++ standards) Strong systems programming and low-level understanding Expertise in Linux internals, kernel tuning, and low-level profiling tools Genuine curiosity about hardware behaviour, networking, and system optimization Why Join: Work More ❯

Junior Software Engineer London, UK £85,000 basic plus bonus We're looking for a Junior Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You'll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal … dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What you'll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What we're looking for A few years commercial experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance More ❯

Junior Software Engineer London, UK £85,000 basic plus bonus We’re looking for a Junior Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You’ll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal … dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What you’ll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What we’re looking for A few years commercial experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance More ❯

Junior Software Engineer London, UK £85,000 basic plus bonus We’re looking for a Junior Software Engineer to join a team that specialise in optimising large-scale, high-performance systems used by demanding clients worldwide. You’ll work across the full delivery lifecycle, from profiling and tuning code, to rethinking architectures ensuring software runs with maximum speed, minimal … dive deep into complex systems, identify bottlenecks, and implement improvements that make a measurable difference for clients. What you’ll be doing Profiling and optimising existing code to boost performance and reduce memory footprint Designing and implementing performance enhancements for high-throughput, low-latency systems Working with Product, Engineering, and Clients to understand and meet performance targets Creating and maintaining automated performance and load testing frameworks Mentoring engineers on writing efficient, scalable, and maintainable code Contributing to architectural decisions that directly impact performance and reliability What we’re looking for A few years commercial experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. You … implementing complex features, or more time on coaching, mentoring, and driving delivery. In all cases, you'll conduct code reviews, contribute to high-impact features, and foster a high-performance engineering culture. This position reports to the VP, Software Engineering, Planning. It will be primarily remote, though you are also welcome to work in our London office. … Key Responsibilities: Shape the architecture and engineering design of the product and its interactions with other applications and services Lead by example in technical delivery and engineering best practices Work with the Product team and other Tech Leads to execute the roadmap and translate requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. Youll … and implementing complex features, or more time on coaching, mentoring, and driving delivery. In all cases, youll conduct code reviews, contribute to high-impact features, and foster a high-performance engineering culture. This position reports to the VP, Software Engineering, Planning. It will be primarily remote, though you are also welcome to work in our London office. … Key Responsibilities: Shape the architecture and engineering design of the product and its interactions with other applications and services Lead by example in technical delivery and engineering best practices Work with the Product team and other Tech Leads to execute the roadmap and translate requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. Youll … and implementing complex features, or more time on coaching, mentoring, and driving delivery. In all cases, youll conduct code reviews, contribute to high-impact features, and foster a high-performance engineering culture. This position reports to the VP, Software Engineering, Planning. It will be primarily remote, though you are also welcome to work in our London office. … Key Responsibilities: Shape the architecture and engineering design of the product and its interactions with other applications and services Lead by example in technical delivery and engineering best practices Work with the Product team and other Tech Leads to execute the roadmap and translate requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate More ❯

Data Scientist, Machine Learning Engineer, ML Engineer, Data Science Engineer, High-Performance Engineering, Python, Data, Pandas, numpy, scikit-learn, pytorch - Oxford - up to 55K About the Role: Join an elite engineering organisation's Software Engineering & Data team, where you'll develop cutting-edge machine learning solutions that directly impact performance at the highest level of … competition. This is a unique opportunity to work alongside Software and Platform Engineers, tackling complex technical challenges from design and manufacture through to live performance analysis. You'll be responsible for proposing, developing, implementing, and maintaining ML-based solutions while collaborating closely with engineering teams across the business. Key Responsibilities: Propose, develop, and deploy machine learning solutions for … complex technical problems Communicate with engineering teams to analyse challenges and develop solutions Work autonomously to deliver results within tight schedules Maintain and improve existing data science pipelines Share knowledge and collaborate across the team Essential Requirements: BSc or MSc degree in a relevant field for Data Science 2+ years development experience in Python and machine learning techniques (production More ❯

As a Systems Performance Engineer, within one of our systems engineering teams, you will provide performance prediction and analysis expertise to major defence programmes, developing the latest Complex Weapons capabilities for the UK Armed Forces in response to advanced threats in all domains (Air, Land, Sea). Expect assignments across concept, assessment or demonstration phase contracts, covering … one of the MBDA product lines. System Performance is an essential part of the system design process and a key indicator as to whether the design is suitable. Salary : Circa £43,000 depending on experience Dynamic (hybrid) working : 5 days per week on-site due to workload classification Security Clearance : British Citizen Restrictions and/or limitations relating to … and UK Security Check (SC) clearance, which are managed by the MBDA Personnel Security Team. What we can offer you: Company bonus : Up to £2,500 (based on company performance and will vary year to year) Pension : maximum total (employer and employee) contribution of up to 14% Overtime: opportunity for paid overtime Flexi Leave: Up to 15 additional days More ❯

Software Engineering Manager/Software Team Lead Hybrid – Manchester We're working with a rapidly growing company seeking a hands-off Software Engineering Leader to guide and inspire a talented, multi-skilled engineering team. This is a fantastic opportunity to lead from the front, not by coding, but by setting vision, driving delivery, and fostering a high … performance engineering culture. You’ll be responsible for leading a team of exceptional engineers building slick, scalable digital consumer products using modern and complex technology stacks. The systems need to be resilient, high-performing, and elegant, supporting both customers and internal teams alike. What You’ll Be Doing: Leading a high-calibre team of senior software engineers. Driving … delivery, best practices, and engineering excellence. Championing modern development practices: TDD, automation, CI/CD, DevOps, and scalable architecture. Supporting the team’s growth, both technically and professionally. Influencing wider tech direction and fostering a strong engineering culture. What We’re Looking For: Proven experience in leading high-performing engineering teams. Solid technical background, ideally in software More ❯

to the platform, so you’ll be involved in building secure systems with strong authentication, encryption, and adherence to regulatory standards. Key Responsibilities: Act as a liaison between the Engineering team and Senior Management, communicating project status and technical challenges Assume a leadership role in the company, representing the Engineering team and promoting best practices in software development. … Feature development and evaluation of the tooling processes both in development and deployment alongside the Platform Engineering team. Help resolve complex software challenges and drive performance optimization. Provide technical direction and guidance to the development team, including code reviews, mentoring and ensuring the platform coding standards are being adhered to. Ensure that development processes and technologies are up … to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance. Contact Philip Boltt at Lorien Global for more information. More ❯

to the platform, so you’ll be involved in building secure systems with strong authentication, encryption, and adherence to regulatory standards. Key Responsibilities: Act as a liaison between the Engineering team and Senior Management, communicating project status and technical challenges Assume a leadership role in the company, representing the Engineering team and promoting best practices in software development. … Feature development and evaluation of the tooling processes both in development and deployment alongside the Platform Engineering team. Help resolve complex software challenges and drive performance optimization. Provide technical direction and guidance to the development team, including code reviews, mentoring and ensuring the platform coding standards are being adhered to. Ensure that development processes and technologies are up … to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance. Contact Philip Boltt at Lorien Global for more information. More ❯

to the platform, so you’ll be involved in building secure systems with strong authentication, encryption, and adherence to regulatory standards. Key Responsibilities: Act as a liaison between the Engineering team and Senior Management, communicating project status and technical challenges Assume a leadership role in the company, representing the Engineering team and promoting best practices in software development. … Feature development and evaluation of the tooling processes both in development and deployment alongside the Platform Engineering team. Help resolve complex software challenges and drive performance optimization. Provide technical direction and guidance to the development team, including code reviews, mentoring and ensuring the platform coding standards are being adhered to. Ensure that development processes and technologies are up … to Work With: Modern microservices architecture powering high-volume systems Containerisation using Docker and Kubernetes for scalable deployments Cloud-native platforms and automated CI/CD pipelines Real-time performance engineering and distributed computing challenges Secure development practices with a focus on system architecture and compliance. Contact Philip Boltt at Lorien Global for more information. More ❯