1 to 25 of 186 Remote Performance Optimisation Jobs in England

systems documentation to support knowledge sharing and future scalability. About you: Proven experience in developing sophisticated, scalable web applications using Java , with a deep understanding of enterprise-level architecture, performance optimisation, and maintainable code standards. Agile team player with experience contributing to sprint planning, daily stand-ups, code reviews, and retrospectives, fostering continuous improvement. A strategic problem-solver … technical challenges and driving innovative solutions. Extensive knowledge in front-end development, utilising JSP, JavaScript/TypeScript, and frameworks like React, with a focus on designing intuitive, responsive, high-performance user interfaces. Robust knowledge of the Spring ecosystem, including Spring Boot , Spring MVC , and Spring Security , to build secure and efficient backend services. Proficient in designing, implementing, and optimising More ❯

exceptional service, to deliver personalised experiences that meet our customers ever-changing needs today and in the future. Role description We are currently recruiting for an Application Reliability and performance Engineer to join our Team. We are seeking a high motivated individual to bring a diverse skill set and proactive mindset to help ensure the stability, efficiency, and resilience … query language and PLSQL Agile principles and ways of working Excellent client-facing communication skills DevOps mindset Excellent problem-solving abilities Automation Core AWS Services & Infrastructure as Code Application Performance Optimisation What’s in it for you?: Competitive salary that reflects your skills, experience and potential. Discretionary bonus scheme that recognises your hard work and contributions to esure More ❯

a leading managed services provider (MSP) and technology partner, specialising in enterprise IT solutions and infrastructure. They are a partner of major vendors such as Broadcom and deliver high-performance, complex systems to large-scale clients across industries. We are seeking an AVI Architect with strong DevOps and application tuning expertise. Operating at an architect level, this role focuses … on supporting tuning activities for complex, high-volume applications and driving performance improvements for the client's most demanding systems. Key Responsibilities: Lead tuning and performance optimisation for complex applications with high function point (FP) volumes. Identify and resolve application performance bottlenecks. Support move to block initiatives, ensuring high-demand applications perform efficiently. Collaborate with the … Cyber Tuning Team to define and implement best practices. Provide architectural-level guidance on DevOps processes and tuning strategies. Document tuning activities, optimisations, and performance improvements. Essential Skills & Experience: Proven experience as a DevOps or Tuning Engineer at an architect level. Expertise in application performance tuning for complex, high-volume systems. Experience in identifying and resolving performance More ❯

enhancing LeOs website and contributing to the broader digital transformation strategy. In this position, you will ensure that the website is up-to-date, functional, and optimised for both performance and security, providing an excellent user experience. Beyond your primary responsibilities Leo will offer you training on Microsofts Power Platform, gaining the Skills and expertise to support and customise … role offers an exciting opportunity for a seasoned web developer eager to expand their skillset by working with cutting-edge Microsoft technologies while contributing to the ongoing growth and optimisation of LeOs digital infrastructure. Key Responsibilities Umbraco Website Development and Maintenance Maintain and enhance the Legal Ombudsmans Umbraco-powered website. Implement updates, troubleshoot issues, and optimise for performance … our Dynamics 365-based Case Management system. Learn and apply plugin development in C# and basic SQL for data handling. SharePoint and Document Management Assist in the development and optimisation of our SharePoint intranet and document management systems. AI and Automation Integration Support the integration of Intelligent Automation (IA) and Artificial Intelligence (AI) technologies across CMS2 and wider infrastructure. More ❯

LeO's website and contributing to the broader digital transformation strategy. In this position, you will ensure that the website is up-to-date, functional, and optimised for both performance and security, providing an excellent user experience. Beyond your primary responsibilities Leo will offer you training on Microsoft's Power Platform, gaining the Skills and expertise to support and … offers an exciting opportunity for a seasoned web developer eager to expand their skill set by working with cutting-edge Microsoft technologies while contributing to the ongoing growth and optimisation of LeO's digital infrastructure. Key Responsibilities Umbraco Website Development and Maintenance Maintain and enhance the Legal Ombudsman's Umbraco-powered website. Implement updates, troubleshoot issues, and optimise for … performance, accessibility (WCAG), and security. Develop using ASP.NET Core, HTML, CSS, JavaScript, and Razor syntax within the MVC framework. Collaboration and Training Provide guidance and training to the Communications team on creating accessible digital content. Work with internal teams and stakeholders to align digital projects with organisational goals. Microsoft Dynamics & Power Platform Development Participate in training on Power Apps More ❯

reviewed until WC 3rd November We’re partnering with a global investment bank to hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high … Python or Java , ideally with working knowledge of another. Rust very desirable Proven experience designing and developing complex, distributed, real-time systems . Deep understanding of software architecture, concurrency, performance optimisation , and system reliability . Demonstrable front-end engineering experience using JavaScript, TypeScript, Angular or React Familiarity with containerisation (Kubernetes, Docker) and modern DevOps practices . Experience in More ❯

reviewed until WC 3rd November We’re partnering with a global investment bank to hire an exceptional Software Engineer to join a flagship team delivering a next-generation, high-performance derivatives risk platform . This is a mission-critical front-office role working on real-time distributed systems with exceptional technical standards. You’ll be part of a high … Python or Java , ideally with working knowledge of another. Rust very desirable Proven experience designing and developing complex, distributed, real-time systems . Deep understanding of software architecture, concurrency, performance optimisation , and system reliability . Demonstrable front-end engineering experience using JavaScript, TypeScript, Angular or React Familiarity with containerisation (Kubernetes, Docker) and modern DevOps practices . Experience in More ❯

Full Stack Developer, you'll: Lead the maintenance and feature development of enterprise-level WordPress sites across multiple brands. Build and maintain shared plugins and reusable microservices to enhance performance and scalability. Collaborate with internal teams and vendors to deliver digital products that push boundaries. Optimise site performance - improving response times, query efficiency, and Core Web Vitals. Troubleshoot … of WordPress + Gutenberg Strong skills in PHP, JS, React, HTML, CSS Experience building custom Gutenberg blocks , APIs, and feeds Solid knowledge of Git , Agile , and JIRA Understanding of performance optimisation , caching , and Core Web Vitals Confident communicator and collaborator in distributed teams Nice to Have Experience with WordPress VIP or PugPig Exposure to AWS (S3, Lambda, EC2 More ❯

Full Stack Developer, you'll: Lead the maintenance and feature development of enterprise-level WordPress sites across multiple brands. Build and maintain shared plugins and reusable microservices to enhance performance and scalability. Collaborate with internal teams and vendors to deliver digital products that push boundaries. Optimise site performance - improving response times, query efficiency, and Core Web Vitals. Troubleshoot … of WordPress + Gutenberg Strong skills in PHP, JS, React, HTML, CSS Experience building custom Gutenberg blocks , APIs, and feeds Solid knowledge of Git , Agile , and JIRA Understanding of performance optimisation , caching , and Core Web Vitals Confident communicator and collaborator in distributed teams Nice to Have Experience with WordPress VIP or PugPig Exposure to AWS (S3, Lambda, EC2 More ❯

Full Stack Developer, you'll: Lead the maintenance and feature development of enterprise-level WordPress sites across multiple brands. Build and maintain shared plugins and reusable microservices to enhance performance and scalability. Collaborate with internal teams and vendors to deliver digital products that push boundaries. Optimise site performance - improving response times, query efficiency, and Core Web Vitals. Troubleshoot … of WordPress + Gutenberg Strong skills in PHP, JS, React, HTML, CSS Experience building custom Gutenberg blocks , APIs, and feeds Solid knowledge of Git , Agile , and JIRA Understanding of performance optimisation , caching , and Core Web Vitals Confident communicator and collaborator in distributed teams Nice to Have Experience with WordPress VIP or PugPig Exposure to AWS (S3, Lambda, EC2 More ❯

commercial experience developing applications using C#, .NET Core, and MVC architecture. Strong front-end skills in Angular and/or Blazor . Advanced SQL Server knowledge (expert-level queries, performance optimisation). Experience with RabbitMQ or similar messaging technologies. Exposure to Azure , Kubernetes (AKS) , and (CI/CD) DevOps pipelines. Understanding of microservices and distributed systems. Excellent problem … consistently and on time. Demonstrating ownership and initiative - taking projects from concept to completion. Contributing to architectural decisions and mentoring within the team. Helping modernise systems while improving throughput, performance, and reliability. 🤝 Why Join SEG Hybrid working, with collaboration being one of our values, we expect presence in our well-situated London Holborn office one day per week, to More ❯

role: High Availability and Disaster Recovery: Configure and maintain solutions like SQL Server Always On Availability Groups to ensure business continuity. Develop and test database backup and recovery procedures. Performance Optimisation: Identify and address performance bottlenecks, optimise queries, and fine-tune system configurations for optimal performance. Development: Support the development of integration solutions and contribute to improvements More ❯

and security. Collaborate with Architecture, InfoSec, and Delivery teams to ensure cohesion across the wider technology ecosystem. Mentor engineers, driving capability growth and continuous improvement. Tackle technical constraints, optimise performance, and manage technical debt to ensure sustainability. What We’re Looking For Proven experience in a Senior or Staff Engineer position, ideally within web and mobile application development. Insurance … modern deployment pipelines. Strong knowledge of cloud-native environments (GCP or Azure preferred). Familiarity with containerisation and infrastructure tools such as Docker, Kubernetes, Helm, and Terraform. Expertise in performance optimisation, caching, and monitoring. A solid understanding of secure coding practices and OWASP guidelines. Desirable: Exposure to Guidewire Software (PolicyCenter, BillingCenter) and mobile frameworks like Ionic Capacitor. You More ❯

gap between visual design and technical functionality and escalating critical gaps in project requirements or processes, when necessary, to proactively address issues Testing and debugging designs to ensure seamless performance and adherence to accessibility standards (e.g. WCAG compliance) Optimising website performance to meet Core Web Vitals benchmarks, including Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative … Layout Shift (CLS) Leveraging modern development techniques such as lazy loading, efficient asset management, and CSS/JS optimisation to enhance user experience and speed Working alongside testers in UAT to ensure our products work as intended Efficiently triaging and managing assigned tickets, maintaining accurate statuses and progress commentary to ensure team alignment Documenting all technical processes, methodologies, and … clarity on requirements and expectations within the Jira workflow Staying up-to-date with the latest web technologies, browser capabilities, and best practices to ensure designs meet or exceed performance expectations Ensuring smooth team operations by handling administrative tasks, such as coordinating team meetings, monitoring workloads, and resolving blockers to maintain project momentum What you’ll need: Strong experience More ❯

a collaborative, agile development team resonsible for designing, building, and maintaining scalable applications. You'll work across the full Microsoft Technology stack, contributing to both new feature development and performance optimisation of existing systems. Key Responsibilities: Design, develop, and maintain robust software components for their EPOS platform using C#, .NET 6/7, and ASP.NET Core . Build … and integrate RESTful APIs , microservices , and backend services that ensure high performance and scalability. Work closely with UI/UX designers , QA engineers , and product managers to deliver high-quality releases on schedule. Participate in code reviews , sprint planning , and architecture discussions . Optimise database access and performance using Entity Framework Core and SQL Server . Contribute to More ❯

as SQL Server Always On, database mirroring, and clustering to minimise downtime and ensure business continuity. Develop, test, and manage database backup and recovery procedures to protect data integrity. Performance Optimisation: Identify and resolve performance bottlenecks, optimise queries, and fine-tune system configurations for peak performance. Development & Integration: Support the development of integration solutions between systems and More ❯

of high-performing web applications using Java, Spring Boot, and modern front-end frameworks. This is a great opportunity to work on large-scale, cloud-hosted systems that require performance, scalability, and innovation. Key Responsibilities: Front-End Development Develop responsive, interactive user interfaces using HTML5, CSS3, and JavaScript. Build modern UI components using React, Angular, or Vue.js. Back-End … APIs. Solid understanding of microservices architecture. Knowledge of frontend frameworks (React/Angular). Familiarity with CI/CD pipelines, Docker, and Kubernetes. Strong understanding of application security and performance optimisation. Experience with JUnit, Mockito , or other testing frameworks. Good communication and collaboration skills. If you are interested or would like to know more, please email jonathan.la@focusonsap.org with More ❯

What you’ll do: Design and build sophisticated React applications integrating with Microsoft Word, M365, and other Office products using Office.js. Write clean, scalable, and maintainable code while driving performance and reliability. Collaborate with product, design, and engineering teams to deliver user-focused, accessible features. Contribute to architectural discussions and help shape the evolution of our tech stack. Mentor … and collaboration skills in English. Proven ability to work independently while contributing effectively to team goals. Experience working successfully in hybrid or remote development environments. Solid understanding of React performance optimisation (e.g. memoisation, code splitting, avoiding unnecessary re-renders). Experience with Git, version control best practices, and CI/CD pipelines. We’ll be lucky if you More ❯

What you’ll do: Design and build sophisticated React applications integrating with Microsoft Word, M365, and other Office products using Office.js. Write clean, scalable, and maintainable code while driving performance and reliability. Collaborate with product, design, and engineering teams to deliver user-focused, accessible features. Contribute to architectural discussions and help shape the evolution of our tech stack. Mentor … and collaboration skills in English. Proven ability to work independently while contributing effectively to team goals. Experience working successfully in hybrid or remote development environments. Solid understanding of React performance optimisation (e.g. memoisation, code splitting, avoiding unnecessary re-renders). Experience with Git, version control best practices, and CI/CD pipelines. We’ll be lucky if you More ❯

a forward-thinking global firm that’s redefining the future of finance through technology. They are looking for a Front-End React Engineer who’s passionate about clean design, performance, and scalability, someone who thrives on combining creativity with technical precision. The Opportunity You’ll join a dynamic development team, responsible for building the tools, platforms, and applications that … Apollo Client , and GraphQL/REST APIs . Experience working in a cloud-native environment ( AWS or Azure ). Familiarity with data streaming (WebSockets, chunked responses) and front-end performance optimisation . Strong understanding of testing frameworks (unit, integration, E2E) - Playwright experience a plus. Bonus points for knowledge of Material UI or other design systems, and data visualisation More ❯

implementation of ML pipelines, APIs, and data integration workflows. Operational Excellence: Contribute to defining reusable development patterns, enforcing coding standards, and implementing MLOps best practices that support version control, performance optimisation, and maintainability. Cross-Disciplinary Collaboration: Work side-by-side with data scientists, product managers, platform engineers, and QA teams to align on technical requirements, delivery timelines, and More ❯

implementation of ML pipelines, APIs, and data integration workflows. Operational Excellence: Contribute to defining reusable development patterns, enforcing coding standards, and implementing MLOps best practices that support version control, performance optimisation, and maintainability. Cross-Disciplinary Collaboration: Work side-by-side with data scientists, product managers, platform engineers, and QA teams to align on technical requirements, delivery timelines, and More ❯

Work closely with UX designers, product owners, and backend engineers to bring business requirements to life through clean, elegant interfaces. Champion best practices for frontend architecture, code quality, and performance optimization. Conduct code reviews, mentor junior developers, and contribute to continuous improvement initiatives. Troubleshoot, debug, and resolve frontend issues to ensure reliability and seamless user experience. Play an active More ❯

Role You’ll be working across the full stack, developing and maintaining scalable web applications that power a global interactive learning platform. Expect a mix of new feature development, performance optimisation, and experimentation with new ideas. End-to-end development in C#/.NET/JavaScript Collaborate directly with product, design and research teams Build and improve interactive … web templates and tools Optimise performance for millions of global users Work remotely as part of a UK-based team that’s expanding steadily Tech Stack C#, .NET (Core and 8), ASP.NET MVC, JavaScript, SQL Server, HTML5, CSS, Azure, Canvas API, WebAudio API What You’ll Need Strong commercial experience in C# and JavaScript Solid understanding of modern web More ❯

Role You’ll be working across the full stack, developing and maintaining scalable web applications that power a global interactive learning platform. Expect a mix of new feature development, performance optimisation, and experimentation with new ideas. End-to-end development in C#/.NET/JavaScript Collaborate directly with product, design and research teams Build and improve interactive … web templates and tools Optimise performance for millions of global users Work remotely as part of a UK-based team that’s expanding steadily Tech Stack C#, .NET (Core and 8), ASP.NET MVC, JavaScript, SQL Server, HTML5, CSS, Azure, Canvas API, WebAudio API What You’ll Need Strong commercial experience in C# and JavaScript Solid understanding of modern web More ❯