24 of 24 Permanent Performance Engineering Jobs in Central London

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 We’re looking for a 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 memory usage … 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 Solid experience in software engineering with strong experience in Python, Java, or C# Proven track record of performance tuning in large 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 ❯

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 ❯

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 ❯

Were working with a leading, technology-driven trading organisation with a global presence, seeking a Senior Software Engineer to join their innovative platform engineering team. This is an exceptional opportunity to work on cutting-edge systems that process data at scale, powering decision-making in fast-moving global markets. Our client is a diversified principal trading firm operating across … multiple asset classes, financial instruments, and emerging sectors. Key Skills & Experience 3+ years experience in platform-level software engineering Strong computer science fundamentals (degree or equivalent experience) Proven expertise in Java, Python, or other modern programming languages Experience working with large-scale, high-volume data systems Strong problem-solving and analytical skills Comfortable collaborating with distributed, global teams The … Role As part of a highly skilled engineering team, you will: Build tools to enable rapid market opportunities and enhance trading operations Partner closely with analysts, quants, and traders to understand their needs and deliver intuitive, self-service solutions Design and develop systems for large-scale data acquisition, processing, storage, and visualisation Contribute to a platform that consolidates technologies More ❯

We’re working with a leading, technology-driven trading organisation with a global presence, seeking a Senior Software Engineer to join their innovative platform engineering team. This is an exceptional opportunity to work on cutting-edge systems that process data at scale, powering decision-making in fast-moving global markets. Our client is a diversified principal trading firm operating … across multiple asset classes, financial instruments, and emerging sectors. Key Skills & Experience 3+ years’ experience in platform-level software engineering Strong computer science fundamentals (degree or equivalent experience) Proven expertise in Java, Python, or other modern programming languages Experience working with large-scale, high-volume data systems Strong problem-solving and analytical skills Comfortable collaborating with distributed, global teams … The Role As part of a highly skilled engineering team, you will: Build tools to enable rapid market opportunities and enhance trading operations Partner closely with analysts, quants, and traders to understand their needs and deliver intuitive, self-service solutions Design and develop systems for large-scale data acquisition, processing, storage, and visualisation Contribute to a platform that consolidates More ❯

infrastructure strategy, delivery, and scale across low-latency trading systems. This hire will drive a major AWS migration, build greenfield environments, modernise legacy systems, and shape the long-term engineering roadmap. Youll lead a small but senior infrastructure function with real autonomy and impact. The Role Own infrastructure architecture across cloud, on-prem and hybrid platforms Lead end-to … connectivity across firewalls, routing and multi-site links Drive network security, segmentation and access control strategy Lead and grow a high-performing infrastructure/DevOps team Partner closely with engineering, trading and risk functions Automate provisioning and deployment with IaC (CloudFormation/Terraform/Ansible) Scale monitoring, cost optimisation and system reliability in production Background 7+ years in infrastructure … leadership within trading, market-making or high-performance engineering environments Strong AWS architecture and hybrid (cloud + on-prem) experience Deep networking background: routing, switching, low-latency connectivity Strong understanding of reliability engineering and autoscaling systems Prior experience building and scaling teams in high-performing environments Confident interacting with technical and trading leadership Core Skills AWS (VPC More ❯

infrastructure strategy, delivery, and scale across low-latency trading systems. This hire will drive a major AWS migration, build greenfield environments, modernise legacy systems, and shape the long-term engineering roadmap. You’ll lead a small but senior infrastructure function with real autonomy and impact. The Role Own infrastructure architecture across cloud, on-prem and hybrid platforms Lead end … connectivity across firewalls, routing and multi-site links Drive network security, segmentation and access control strategy Lead and grow a high-performing infrastructure/DevOps team Partner closely with engineering, trading and risk functions Automate provisioning and deployment with IaC (CloudFormation/Terraform/Ansible) Scale monitoring, cost optimisation and system reliability in production Background 7+ years in infrastructure … leadership within trading, market-making or high-performance engineering environments Strong AWS architecture and hybrid (cloud + on-prem) experience Deep networking background: routing, switching, low-latency connectivity Strong understanding of reliability engineering and autoscaling systems Prior experience building and scaling teams in high-performing environments Confident interacting with technical and trading leadership Core Skills AWS (VPC More ❯

an experienced Test Architect/Senior Test Manager with Consultancy experience to join them on a permanent basis due to company growth. They provide pioneering and cutting-edge Quality Engineering and Agile/DevOps transformation services. To be successful in this role you should bring consulting experience and the ability to work at ease and collaboratively to support their … clients. Delivery Requirements • Extensive experience in delivering complex test projects and programmes - Agile and Waterfall • Experience in working across the SDLC and understanding software engineering, strong knowledge of test phases eg Unit, System, Integration, UAT and NFT • Great working knowledge of test automation, performance engineering, DevOps, test environments, test data, test management, and SDLC tools • Ability to … level Test Strategies, Approach and Plans • Ability to create test estimates, budgets, and define/build reusable testing assets for large/complex projects • Experience in defining standard quality engineering architecture, methodology, technical and process improvement, and tools across engagements • Demonstrable ability to improve quality practices across the software delivery lifecycle including integration into project management methodologies Leadership Responsibilities More ❯

an experienced Test Architect/Senior Test Manager with Consultancy experience to join them on a permanent basis due to company growth. They provide pioneering and cutting-edge Quality Engineering and Agile/DevOps transformation services. To be successful in this role you should bring consulting experience and the ability to work at ease and collaboratively to support their … clients. Delivery Requirements Extensive experience in delivering complex test projects and programmes - Agile and Waterfall Experience in working across the SDLC and understanding software engineering, strong knowledge of test phases eg Unit, System, Integration, UAT and NFT Great working knowledge of test automation, performance engineering, DevOps, test environments, test data, test management, and SDLC tools Ability to … level Test Strategies, Approach and Plans Ability to create test estimates, budgets, and define/build reusable testing assets for large/complex projects Experience in defining standard quality engineering architecture, methodology, technical and process improvement, and tools across engagements Demonstrable ability to improve quality practices across the software delivery lifecycle including integration into project management methodologies Leadership Responsibilities More ❯

Power BI. The role requires deep technical expertise in Spotfire s visual and scripting frameworks, alongside the ability to reverse-engineer, redesign and optimize data models for scalable, high-performance reporting in Power BI. This role is critical to navigating functional parity, data transformation and performance alignment between platforms, working closely with business users, report owners and Power … and Power BI developers to align source data, dataflows and model transformations. Work with business stakeholders to define functional parity, consolidate multiple versions and recommend optimisations. Provide guidance on performance engineering approaches in Power BI, including model size reduction, incremental refresh, composite models, DirectQuery/Import trade-offs. Support UAT by validating that migrated Power BI reports meet More ❯

Power BI. The role requires deep technical expertise in Spotfire s visual and scripting frameworks, alongside the ability to reverse-engineer, redesign and optimize data models for scalable, high-performance reporting in Power BI. This role is critical to navigating functional parity, data transformation and performance alignment between platforms, working closely with business users, report owners and Power … and Power BI developers to align source data, dataflows and model transformations. Work with business stakeholders to define functional parity, consolidate multiple versions and recommend optimisations. Provide guidance on performance engineering approaches in Power BI, including model size reduction, incremental refresh, composite models, DirectQuery/Import trade-offs. Support UAT by validating that migrated Power BI reports meet More ❯

Power BI. The role requires deep technical expertise in Spotfire s visual and scripting frameworks, alongside the ability to reverse-engineer, redesign and optimize data models for scalable, high-performance reporting in Power BI. This role is critical to navigating functional parity, data transformation and performance alignment between platforms, working closely with business users, report owners and Power … and Power BI developers to align source data, dataflows and model transformations. Work with business stakeholders to define functional parity, consolidate multiple versions and recommend optimisations. Provide guidance on performance engineering approaches in Power BI, including model size reduction, incremental refresh, composite models, DirectQuery/Import trade-offs. Support UAT by validating that migrated Power BI reports meet More ❯

a leading quantitative crypto trading firm building globally distributed, ultra-low-latency systems that power their research and execution platform. Youll work at the intersection of infrastructure, software, and performance engineering - solving deep technical problems at scale. What youll do: Own and optimise infrastructure behind a 24/7 web data and trading platform spanning multiple clouds and … and comfortable debugging distributed systems. Experience in high-throughput, low-latency, or large-scale environments (finance, trading, or scraping preferred). If youre an engineer who loves optimisation, systems performance, and solving real production challenges - please apply. More ❯

leading quantitative crypto trading firm building globally distributed, ultra-low-latency systems that power their research and execution platform. You’ll work at the intersection of infrastructure, software, and performance engineering - solving deep technical problems at scale. What you’ll do: Own and optimise infrastructure behind a 24/7 web data and trading platform spanning multiple clouds … comfortable debugging distributed systems. Experience in high-throughput, low-latency, or large-scale environments (finance, trading, or scraping preferred). If you’re an engineer who loves optimisation, systems performance, and solving real production challenges - please apply. More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid 2 days WFH) Salary: 150,000 - 200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . With … the edge of whats possible in the browser solving problems of scale, speed, and complexity that ordinary web development never touches. What youll do Design and optimise a high-performance UI framework used globally in real-time applications. Push the limits of JavaScript, TypeScript, and the browser runtime to handle millions of data points smoothly. Solve deep algorithmic and … developers and enterprises worldwide. What youll bring Mastery of vanilla JavaScript and TypeScript , with additional exposure to C++, Java, or C# . Strong knowledge of data structures, algorithms, and performance optimisation . Experience with frameworks like React, Angular, or Vue , and a deep understanding of DOM internals and rendering pipelines . A systems-level mindset : diagnosing bottlenecks, eliminating memory More ❯

Principal JavaScript Performance Engineer (with C++/Java/C# exposure) Location: London (Hybrid – 2 days WFH) Salary: £150,000 - £200,000 (Permanent)pension, private healthcare, gym membership, 25 days + 8 BH holiday allowance, tech/hardware budget. A high-growth software company is building the gold standard in UI frameworks and data-intensive visualisation technology . With … of what’s possible in the browser — solving problems of scale, speed, and complexity that ordinary web development never touches. What you’ll do Design and optimise a high-performance UI framework used globally in real-time applications. Push the limits of JavaScript, TypeScript, and the browser runtime to handle millions of data points smoothly. Solve deep algorithmic and … and enterprises worldwide. What you’ll bring Mastery of vanilla JavaScript and TypeScript , with additional exposure to C++, Java, or C# . Strong knowledge of data structures, algorithms, and performance optimisation . Experience with frameworks like React, Angular, or Vue , and a deep understanding of DOM internals and rendering pipelines . A systems-level mindset : diagnosing bottlenecks, eliminating memory More ❯

metal Linux to modern build and observability stacks . Linux Platform Engineer – Trading Infrastructure Overview The firm is seeking a Linux Platform Engineer to join a small, high-impact engineering group supporting ML/AI-driven trading. These teams run massive simulation, HPC, and production workloads and depend on ultra-reliable, ultra-fast Linux platforms. The engineer will own … critical infrastructure at scale and help shape the next generation of compute systems. Key Responsibilities Optimize and tune Linux for performance, stability, and low latency . Contribute to kernel-level debugging and system improvements . Automate Linux fleet builds—creating consistent, reproducible systems . Manage Kubernetes cluster infrastructure, networking, and container orchestration. Enhance observability Analyze and optimize networking across … the full TCP/IP stack . Investigate core dumps, memory bottlenecks, and CPU performance issues across distributed systems. Develop Python tooling for internal automation and performance analysis. Debug complex infrastructure challenges across simulation, HPC, and AI-style compute workloads . What You Will Work On Advanced simulation and high-performance computing pipelines. Integrations with internal and More ❯

eTrading C++ High Performance Engineer - Leading Quantitative Hedge Fund | London 5 days in office Market Leading Compensation I am partnered with a global quantitative hedge fund operating who are seeking an exceptional Developer to help build the next generation of low-latency trading applications. This is a rare opportunity to work at the intersection of finance and technology, where … your code directly impacts trading decisions in real-time markets, working on mission critical systems. You will design and develop high-performance, low-latency trading systems using modern C++ and build responsive interfaces for traders and analysts. Essential Skills Experience: 4+ years of hands-on development experience in high-performance systems using C++ Proven experience working in both More ❯

eTrading C++ High Performance Engineer - Leading Quantitative Hedge Fund | London 5 days in office Market Leading Compensation I am partnered with a global quantitative hedge fund operating who are seeking an exceptional Developer to help build the next generation of low-latency trading applications. This is a rare opportunity to work at the intersection of finance and technology, where … your code directly impacts trading decisions in real-time markets, working on mission critical systems. You will design and develop high-performance, low-latency trading systems using modern C++ and build responsive interfaces for traders and analysts. Essential Skills Experience: 4+ years of hands-on development experience in high-performance systems using C++ Proven experience working in both More ❯