1 to 25 of 209 Permanent Performance Optimisation Jobs in the UK

Developer Frontend Development, Web Performance, Accessibility, CMS Salary £40-50k Hybrid working - Chester Strong progression and learning opportunities Who We Are We are a technology-driven organisation building and maintaining modern, cloud-based web platforms that support both internal teams and external users. Web development plays a critical … experiences. Working closely with IT, product, and business stakeholders, our web team focuses on building high-quality, maintainable websites that follow best practice in performance, security, and accessibility. As our platforms continue to evolve, we're looking for a skilled Web Developer to help design, build, and improve ...

. Translate UI/UX wireframes and design systems into high-quality, reusable front-end components. Ensure cross-browser and cross-device compatibility, including performance optimisation for page load, rendering, and interactions. Integrate front-end components with APIs and back-end services, handling data fetching, error states … state management approaches (e.g. Redux/Fluxor or similar for Blazor). Solid understanding of responsive design, cross-browser quirks, and front-end performance optimisation techniques. Familiarity with RESTful APIs, JSON, and common front-end tooling (package managers, bundlers, linters). Experience using Git, DevOps version control systems ...

would be beneficial. Key Responsibilities: Lead front-end development across LibertyLondon.com (Salesforce Commerce Cloud) and the Fabrics site (WordPress), ensuring high standards of quality, performance, and maintainability. Translate design systems, wireframes, and high-fidelity designs into robust, scalable, and accessible front-end solutions. Own and influence front-end architectural … discovery and planning process. Design, build, and deploy MVT and A/B complex experiments using Dynamic Yield, collaborating with analytics and optimisation teams to improve conversion and usability. Support HTML email development, ensuring consistency, accessibility, and responsiveness across clients and devices. Champion front-end best practices, including performance ...

Senior Compiler Engineer Location: London Salary: £80k – £100k We’re partnering with a well-funded, fast-growing semiconductor and AI computing company building high-performance compute platforms at the intersection of advanced silicon, accelerators, and compiler technology. They are expanding their compiler organisation and are looking for Senior … Staff-level Compiler Engineers to work on performance-critical, hardware-aware compiler systems that directly impact next-generation compute products. Senior Compiler Engineer Responsibilities Development and evolution of LLVM-based and custom compiler toolchains Performance optimisation for AI/ML and accelerator-driven workloads Low-level code ...

institutional-grade liquidity and technology. About the Role We are seeking a highly capable Senior Web Developer to lead the design, development, and optimisation of high-performance websites and digital experiences that support product launches, marketing campaigns, and customer acquisition. This role combines strong technical execution with performance … capture forms, webinar registration pages, and product demo request pages Ensure all product pages are optimized for search engine visibility and user engagement Website Performance & Infrastructure for Launch Ensure website infrastructure can handle significant traffic increases during product launch periods Implement performance monitoring to maintain sub-2-second ...

ability to architect distributed systems A ‘no-compromise’ attitude with engineering best practices such as clean code, TDD, containerisation, security, CI/CD, scalability, performance and cost optimisation Active user of AI-assisted development tools (Claude Code, GitHub Copilot, Cursor) with demonstrable experience using structured workflows … scalable microservice architecture Proven track record developing and deploying GenAI/LLM-based systems in production Advanced understanding of context engineering, prompt construction, optimisation and evaluation techniques End-to-end implementation experience using vector databases and retrieval pipelines Experience with GitHub Actions, Docker, Kubernetes and cloud-native deployments ...

front-end and web engineers (React) across a mix of seniority levels. Own people management responsibilities including hiring, onboarding, line management, performance management, coaching, mentoring, and career development. Foster a collaborative, inclusive, and high-performance team culture focused on continuous improvement and psychological safety. Technical Leadership & Delivery Provide … modern web technologies, including JavaScript, HTML, CSS, and React-based frameworks . Strong understanding of modern front-end architecture, including state management, routing, navigation, performance optimisation, module federation, microservice architecture and accessibility standards. Experience designing and maintaining CI/CD pipelines , using version control effectively, and working within ...

appoint an experienced Paid Media Manager to join its in-house digital marketing team.This is a hands-on role focused on lead generation , performance optimisation, and return on investment across paid search and paid social. You’ll take ownership of paid media activity, working closely with internal marketing … stakeholders and an external performance agency to deliver measurable commercial outcomes.The role suits someone who is both strategic and execution-focused — comfortable setting direction, but equally confident getting into platforms, analysing performance, and driving continuous improvement. The Role As Paid Media Manager, you will lead the planning, delivery ...

will be working for an Agile, tech driven innovative company who offer continuous improvement and career progression. Desired tech stack includes Front end performance optimization (Tailwind, Storybook), database design, CI/CD, Docker, Linux systemsadmin, application security and monitoring tools Datadog. The client can offer hybrid working. ...

mathematics, and experience working in model-driven development environments. The position involves working within multidisciplinary engineering teams to translate mathematical models into robust, high-performance software implementations. The ideal candidate will be comfortable working in Linux-based environments, collaborating across modelling, software, systems, and verification functions. Responsibilities Design, develop … optimise real-time DSP algorithms in C++ within high-performance computing environments. Integrate both auto-generated and hand-crafted model-based code into larger software systems. Conduct modelling, simulation, and validation of algorithms using MATLAB, Simulink, or similar environments. Execute structured testing, benchmarking, and verification of DSP components ...

turn cutting-edge ideas into real-world products. What You’ll Do Lead the design, development, and maintenance of scalable, secure, and high-performance backend services and APIs. Collaborate across the engineering team — including frontend, product, and QA — to architect solutions that address business needs and technical challenges. Drive … full development lifecycle: requirements, design, implementation, testing, deployment, and support. Improve and optimise existing systems for performance, reliability, and maintainability. Conduct code reviews, provide technical leadership, and mentor junior engineers to uphold best practices. Identify and address security, performance, and scaling bottlenecks. What We’re Looking For 5+ ...

turn cutting-edge ideas into real-world products. What You’ll Do Lead the design, development, and maintenance of scalable, secure, and high-performance backend services and APIs. Collaborate across the engineering team — including frontend, product, and QA — to architect solutions that address business needs and technical challenges. Drive … full development lifecycle: requirements, design, implementation, testing, deployment, and support. Improve and optimise existing systems for performance, reliability, and maintainability. Conduct code reviews, provide technical leadership, and mentor junior engineers to uphold best practices. Identify and address security, performance, and scaling bottlenecks. What We’re Looking For 4+ ...

coding experience preferred) Solid background in system design, distributed systems, and cloud architectures (AWS/Azure/GCP) Passion for clean code, testing, and performance optimization Excellent communication, leadership, and decision-making skills A mindset for innovation, problem-solving, and continuous improvement Bonus Points For Experience in microservices architecture ...

across digital platforms. Working closely with UX Designers, Software Engineers, and Solution Architects, the engineer will translate design concepts into functional interfaces, optimise application performance, and contribute to the continuous improvement of the front-end framework. Responsibilities Building responsive, accessible, high-performing web applications Designing reusable front-end components …/UI designs into functional interfaces Integrating with RESTful/GraphQL APIs Ensuring web security, authentication, and session management best practices Optimising for performance, accessibility (WCAG), and cross-browser compatibility Contributing to CI/CD pipelines and cloud deployments (AWS or Azure) Working within Agile teams and participating ...

Unix commands and shell scripting. Experience with code quality tools such as Sonar and knowledge of design patterns. Experience with code reusability and performance optimisation. Rewards & Benefits TCS is consistently voted a Top Employer in the UK and globally. Our competitive salary packages feature pension, health care, life assurance ...

What you’ll be doing In this role, you will: Design and develop high‐performance, real‐time components that power robotics command, control, and telemetry systems Lead the design and implementation of mission‐critical systems , ensuring clarity, reliability, and responsiveness under demanding workloads Own the full product lifecycle , from … directly with end users to gather actionable feedback, run usability testing, and rapidly iterate on product enhancements Champion technical excellence by driving code quality, performance optimisation, design consistency, and best practices across the platform What experience will set you up for success We believe the following experience will ...

experience with data analytics, visualization, and database systems. Solid understanding of power system modelling, techno-economic simulation, and energy systems. Strong debugging, profiling, and performance optimization skills. Excellent communication and documentation abilities. Experience using Pyomo, AMPL, Gurobi, CPLEX, or similar optimization tools. Working knowledge of containerization and cloud-native ...

backend services with Node.js/Express. Creating modern, responsive UI components using React (including Hooks). Working with MongoDB for data modelling, indexing, and performance optimisation. Ensuring security best practices — especially relevant for healthcare systems. Participating in Agile ceremonies, code reviews, and platform improvement sessions. Debugging, troubleshooting, and enhancing ...

agile team of 5-7 mobile engineers (React Native) across a mix of seniority levels. Own people management responsibilities including hiring, onboarding, line management, performance management, coaching, mentoring, and career development. Foster a collaborative, inclusive, and high-performance team culture focused on continuous improvement and psychological safety. Technical … mobile SDLC. Proven experience of REST/GraphQL API integration with mobile applications Solid understanding of mobile application fundamentals: iOS/Android app lifecycle, performance constraints and release management Proven hands-on software engineering background across modern mobile technologies e.g. cross platform/native development. Strong understanding of modern ...

engineering team. Key Responsibilities Lead the design and implementation of complex, scalable frontend architecture using modern JavaScript frameworks. Own the frontend technical direction, ensuring performance, accessibility, and maintainability at scale. Collaborate with product managers, designers, and engineers to translate requirements into robust technical solutions. Mentor and guide engineers through … React and TypeScript (or equivalent modern frameworks). Strong understanding of component-based architecture, state management, and responsive design. Deep knowledge of browser APIs, performance optimisation, accessibility standards, and cross-browser compatibility. Experience designing and maintaining frontend design systems or shared component libraries. Full Stack & Backend Experience Exposure ...

Experience with TypeScript and React Exposure to frontend design systems Experience with Docker and cloud platforms (AWS preferred) Knowledge of modern web architecture and performance optimisation A proactive, pragmatic mindset someone who takes ownership and gets things done Why apply to be a Software Engineer? Join a mission ...

Experience with TypeScript and React Exposure to frontend design systems Experience with Docker and cloud platforms (AWS preferred) Knowledge of modern web architecture and performance optimisation A proactive, pragmatic mindset — someone who takes ownership and gets things done Why apply to be a Software Engineer? Join a mission ...

high-end construction companies. Working closely with our Senior Developer and design team, you’ll collaborate on developing bold concepts into pixel-perfect, high-performance experiences. We run a modern JAMStack, headless architecture designed for performance and scale, with CI/CD pipelines for automated testing and deployment. … designs into refined, performant builds ✔ Collaborating with designers, strategists and project managers ✔ Maintaining and improving existing projects as they evolve ✔ Learning best practices around performance, security and scalability ✔ Contributing ideas - technically and creatively ✔ Develop industry-leading WordPress and Shopify websites for incredible clients. ✔ Maintain hosting environments - optimising performance ...

pension, private healthcare, gym membership, hardware budget London (Hybrid – 2 days WFH) A high-growth software company is building the next generation of high-performance UI frameworks and data-intensive visualisation technology. Their products power mission-critical applications used by global enterprises, financial institutions, and technology firms, relied … hire engineers who enjoy working close to the metal of the browser, solving problems that demand a deep understanding of algorithms, runtime behaviour, and performance at scale. This is not typical web development. It’s engineering at the limits of what modern browsers can do. What you’ll work ...

effectively and meet business and operational requirements. The role sits within our OT and Infrastructure Operations and is responsible for database operations, migrations and performance optimisation across global industrial systems thus, requiring a candidate who has proven experience managing complex database platforms and a strong understanding of secure … access control and integrity, ensuring platforms remain robust and compliant - Maintain and optimise schemas, backups, functions, procedures and related services, with a focus on performance and resilience - Monitor and tune database performance to drive efficiency and continuous improvement - Support secure customer data migration projects, ensuring effective planning, execution ...