601 to 625 of 975 Performance Optimisation Jobs in the UK

12+ years of experience. - Lead the development, testing, and maintenance of low-latency Java applications. - Collaborate with cross-functional teams to gather requirements and design system architecture. - Optimize application performance and troubleshoot latency issues. - Mentor junior developers and ensure adherence to best coding practices. - Participate in code reviews and provide constructive feedback. - Stay updated with the latest industry trends … Bachelor's degree in Computer Science, Engineering, or a related field. - Proven experience in Java development, with a focus on low-latency systems. - Strong understanding of multithreading, concurrency, and performance optimization. - Experience with frameworks and libraries such as Spring, Hibernate, and Netty. - Familiarity with distributed systems and network protocols. - Excellent problem-solving skills and attention to detail. - Effective communication More ❯

12+ years of experience. - Lead the development, testing, and maintenance of low-latency Java applications. - Collaborate with cross-functional teams to gather requirements and design system architecture. - Optimize application performance and troubleshoot latency issues. - Mentor junior developers and ensure adherence to best coding practices. - Participate in code reviews and provide constructive feedback. - Stay updated with the latest industry trends … Bachelor's degree in Computer Science, Engineering, or a related field. - Proven experience in Java development, with a focus on low-latency systems. - Strong understanding of multithreading, concurrency, and performance optimization. - Experience with frameworks and libraries such as Spring, Hibernate, and Netty. - Familiarity with distributed systems and network protocols. - Excellent problem-solving skills and attention to detail. - Effective communication More ❯

12+ years of experience. - Lead the development, testing, and maintenance of low-latency Java applications. - Collaborate with cross-functional teams to gather requirements and design system architecture. - Optimize application performance and troubleshoot latency issues. - Mentor junior developers and ensure adherence to best coding practices. - Participate in code reviews and provide constructive feedback. - Stay updated with the latest industry trends … Bachelor's degree in Computer Science, Engineering, or a related field. - Proven experience in Java development, with a focus on low-latency systems. - Strong understanding of multithreading, concurrency, and performance optimization. - Experience with frameworks and libraries such as Spring, Hibernate, and Netty. - Familiarity with distributed systems and network protocols. - Excellent problem-solving skills and attention to detail. - Effective communication More ❯

layouts in Next.js/React . Collaborate with backend engineers to shape and optimise FastAPI endpoints for data-heavy, real-time interfaces. Refactor and enhance existing UI components for performance, accessibility, and maintainability. Contribute to overall system design, ensuring smooth integration between frontend, backend, and AI/LLM modules. Participate in sprint planning, code reviews, and architectural discussions as … SPAs with React (and ideally Next.js) . Proficient in Python for backend integration — experience with FastAPI or Flask a plus. Strong understanding of RESTful APIs , asynchronous programming, and frontend performance optimisation. Comfortable working across the stack, contributing to both UI and backend logic. Experience with cloud-hosted environments (Azure, GCP, or AWS). Familiarity with AI/ML or More ❯

technical vision of this business and work on their product from an early stage. What you'll work on: Backend APIs (Python/FastAPI): Build and maintain secure, high-performance services that drive AI features and data access at scale. RAG & vector search: Design and improve retrieval pipelines (embeddings, chunking, hybrid search, ranking, feedback loops), owning schema design, latency … platform on AWS (ECS), separating ingestion, retrieval, reasoning, and delivery. Quality & reliability: Ensure reliability through testing, CI/CD, observability (metrics/tracing for LLM and retrieval paths), and performance optimisation. Collaboration: Partner with product and leadership teams, mentor peers, and play a role in shaping technical direction. Innovation: Explore and recommend new technologies, frameworks, and methods for both More ❯

level SAP Basis administration across ABAP, Java, and hybrid system landscapes. Manage complex SAP environments hosted on HANA, SQL Server, Oracle, DB2, MaxDB, and ASE databases. Drive system stability, performance, and reliability through proactive monitoring, tuning, and optimisation. Take ownership of Priority 1 (P1) incident resolution, ensuring swift recovery and detailed root cause analysis. Implement SAP Notes, kernel upgrades … and SAP BTP administration or integration. Solid grasp of SAP Security and GRC principles, with a commitment to compliance best practices. Track record of delivering SAP migrations, upgrades, and performance optimisations. Working knowledge of SAP Solution Manager for monitoring, maintenance, and change control. Exceptional problem-solving, communication, and stakeholder management skills. Desirable Skills: Experience running SAP on public cloud More ❯

systems used across global industries.This company is recognised for its innovation and technical excellence, delivering bespoke engineered solutions that integrate hardware, software, and operational technology (OT) into complex, high-performance systems. With continued growth and a strong global project pipeline, they are expanding their technical team to support and enhance these cutting-edge systems in the UK and abroad.In … technology platforms, blending hands-on work with advanced system-level understanding across control software, embedded hardware, and networked OT environments. From system commissioning and integration through to troubleshooting and performance optimisation, you'll help deliver reliable, scalable, and intelligent solutions deployed in demanding real-world conditions.This is an exceptional opportunity for a technically minded individual who excels at … all expenses fully covered.The Role: Provide advanced technical support for integrated software, hardware, and OT systems Lead diagnostics, troubleshooting, and commissioning of complex automation and control solutions Drive system optimisation and reliability improvements, ensuring seamless hardware-software interaction Collaborate with R&D and engineering teams to resolve technical challenges and implement enhancements Full expenses paid travel to USA, China More ❯

used across global industries. This company is recognised for its innovation and technical excellence, delivering bespoke engineered solutions that integrate hardware, software, and operational technology (OT) into complex, high-performance systems. With continued growth and a strong global project pipeline, they are expanding their technical team to support and enhance these cutting-edge systems in the UK and abroad. … technology platforms, blending hands-on work with advanced system-level understanding across control software, embedded hardware, and networked OT environments. From system commissioning and integration through to troubleshooting and performance optimisation, you'll help deliver reliable, scalable, and intelligent solutions deployed in demanding real-world conditions. This is an exceptional opportunity for a technically minded individual who excels … expenses fully covered. The Role: Provide advanced technical support for integrated software, hardware, and OT systems Lead diagnostics, troubleshooting, and commissioning of complex automation and control solutions Drive system optimisation and reliability improvements, ensuring seamless hardware-software interaction Collaborate with R&D and engineering teams to resolve technical challenges and implement enhancements Full expenses paid travel to USA, China More ❯

looking for a Nutanix Subject Matter Expert to join a global DaaS transformation project for one of our enterprise clients. The successful consultant will own the architecture, deployment and optimisation of the new Nutanix HCI environment running on HPE compute , supporting the migration of the client's virtual desktop estate. Responsibilities: Design, deploy and tune the full Nutanix HCI … stack , including: AOS (Acropolis OS) AHV (Acropolis Hypervisor) ASO (Acropolis Storage) Build and platform readiness for Horizon delivery Performance optimisation, capacity planning, monitoring & automation Integration with enterprise DR & replication tooling: Veeam/Cohesity/Rubrik/ICMU DR Ensuring resilience, failover, backup and data protection standards Collaborate with Horizon consultants across multi-region rollout Essential Experience: Proven Nutanix … scale EUC or VDI environments is ideal Project Highlights: Global multi-region deployment Modernisation of VDI/DaaS workloads onto Nutanix HPE Integrated DR and data protection strategy High-performance and scalability focus Nutanix SME - (HPE Platform, Global DaaS Programme) Location: Remote + occasional on-site (Hampshire) Engagement: Outside IR35 Duration: Initial 6 months Start: ASAP More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

z/OS Systems Programmer (Mainframe) - Fully Remote We are looking for an experienced z/OS Systems Programmer to join our team, supporting the migration, installation, maintenance, and performance optimisation of IBM z/OS environments. This role is critical to ensuring reliability, security, and efficiency across our Mainframe infrastructure, while contributing to modernisation and compliance initiatives. … Responsibilities Install, configure, and maintain z/OS, JES2, SMP/E, and RACF Manage system patches, upgrades, and performance tuning Troubleshoot and resolve complex Mainframe systems issues Support integrations, migrations, and deployments across the platform Ensure adherence to security policies and regulatory compliance Collaborate with technical teams to deliver efficient and secure solutions Key Skills & Experience Strong experience More ❯

design systems, style guides, and reusable UI components to ensure consistency across products. Usability & Accessibility: Ensure designs adhere to best practices for usability, accessibility (WCAG compliance), and responsive behaviour. Performance & Optimization: Optimize front-end performance and UI interactions to enhance user experience across various devices and platforms. Continuous Improvement: Stay updated with industry trends, tools, and best practices … design skills. Proficiency in design tools such as Figma. Strong knowledge of HTML, CSS (SASS/LESS), and JavaScript frameworks (e.g., React, Angular, Vue). Experience with front-end performance optimization and responsive design principles. Familiarity with accessibility standards (WCAG) and cross-browser compatibility. Understanding of version control tools (e.g., Git, Azure DevOps). Excellent communication skills, with the More ❯