1 to 25 of 58 Permanent Performance Engineering Jobs in the South East

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 ❯

impact and cost is fully understood. Setting and agreeing shared targets and business outcomes with stakeholders Assist with the creation of key artefacts; strategies, communication plans Operational stability and performance enhancements Continuous improvement in the face of changing objectives. Provide design guidelines and assistance to major projects Assist with the transformation strategy for the Billing Domain, including engineering … and design strategies in order to maximize revenue and minimize cost for business. Ensure that requirement compliancy to design is tracked through the project lifecycle through to deployment. Technical performance engineering - to design in-life performance improvements (availability, capacity, reliability, security) Build software engineering skills and best practice To make sure that deliverables support the required … business outcome at all points of consumption within a journey Make sure all component managers comply with requirements to address non-functional impacts e.g. performance and reliability. Make sure all critical systems have implemented an appropriate level of resilience, both local & geographic, that is regularly tested Main Interfaces: Work with relevant domain and solution architects and designers to agree More ❯

impact and cost is fully understood. Setting and agreeing shared targets and business outcomes with stakeholders Assist with the creation of key artefacts; strategies, communication plans Operational stability and performance enhancements Continuous improvement in the face of changing objectives. Provide design guidelines and assistance to major projects Assist with the transformation strategy for the Billing Domain, including engineering … and design strategies in order to maximize revenue and minimize cost for business. Ensure that requirement compliancy to design is tracked through the project lifecycle through to deployment. Technical performance engineering - to design in-life performance improvements (availability, capacity, reliability, security) Build software engineering skills and best practice To make sure that deliverables support the required … business outcome at all points of consumption within a journey Make sure all component managers comply with requirements to address non-functional impacts e.g. performance and reliability. Make sure all critical systems have implemented an appropriate level of resilience, both local & geographic, that is regularly tested Main Interfaces: Work with relevant domain and solution architects and designers to agree 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 ❯

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 ❯

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 ❯

Senior Python Engineer Salary: Pays up to £85,000 Location: London (2 Days in Office) Join a high-performance engineering team redefining how global systems fight fraud at scale, where you'll architect resilient solutions, shape technical direction, and mentor others to deliver mission-critical impact with performance, reliability, and simplicity. The Opportunity Step into a pivotal … role where your engineering expertise shapes the future of digital integrity. As a Senior Engineer, you'll design and deliver high-impact, cross-service features that power a cutting-edge platform used by global customers. You'll have the freedom to make architectural decisions, drive performance and reliability improvements, and mentor talented engineers across a collaborative, high-growth … ownership of designing, building, and operating scalable backend systems that power a global, data-driven platform. You'll lead the delivery of complex, cross-service features, shaping architecture, improving performance, and ensuring reliability across the stack. Collaboration is key as you work closely with Product, Data, and Design to translate ambitious ideas into resilient, production-ready solutions. You'll 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. 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 ❯