126 to 150 of 272 Performance Optimisation Jobs in the UK

Senior Front End Developer

Hiring Organisation
Halian Technology Limited
Location
Maidenhead, Berkshire, South East, United Kingdom
Employment Type
Permanent
Salary
£85,000
deliver features from concept through to production Contribute to and evolve front-end architecture, component libraries, and shared patterns Maintain high standards across performance, accessibility, and overall user experience Support production stability and continuously improve the quality of live systems Provide technical guidance, contribute to code reviews, and mentor … TypeScript and modern frameworks such as React, Vue.js, or similar Solid front-end engineering fundamentals including: Component-based architecture State management Responsive design Accessibility Performance optimisation Internationalisation Experience with automated testing (component and end-to-end) using tools such as Playwright, Cypress, or similar Familiarity with CI/ ...

Senior Data Engineer (Informatica)

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £530 per day
shell scripts for automation, job scheduling, and data processing Perform data analysis, mapping, and transformation for complex data sources Ensure data quality, integrity, and performance optimisation across ETL processes Collaborate with business and technical teams to translate requirements into scalable data solutions Support testing, deployment, and production support …/SQL) Proficiency in UNIX/Linux shell scripting Proven experience working in Data Warehouse/ETL environments Experience in data integration, transformation, and performance tuning Strong understanding of ETL frameworks, data pipelines, and batch processing Desirable Skills Working knowledge of SAS (especially in ETL context) Experience in migrating ...

Site Reliability & Network Systems Administrator

Hiring Organisation
Franklin Bates Limited
Location
Leamington Spa, Warwickshire, West Midlands, United Kingdom
Employment Type
Permanent
Salary
£55,000
Following continued growth and significant investment, they're looking to appoint an experienced Site Reliability & Network Systems Administrator to take ownership of the reliability, performance and resilience of their infrastructure. This is an opportunity to move beyond traditional IT support into a role where you will have genuine influence … will be involved in: Designing, implementing and administering Microsoft Azure environments Building scalable, resilient and secure cloud infrastructure Azure tenant setup, configuration and ongoing optimisation Managing networking, routing, firewalls, VPNs and connectivity Infrastructure monitoring, alerting and performance optimisation Implementing and managing web monitoring and observability platforms Incident ...

Senior JVM Software Engineer

Hiring Organisation
ARM
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600/day
team building a distributed calculation engine used to calculate financial indices and quantitative models. This is a business-critical platform operating within a high-performance financial services environment. This is primarily a backend engineering role, focused on designing and building new functionality rather than support or maintenance. Skills & Experience … technical trade-offs System ownership experience Strong Java development skills Understanding of how Java applications run in production JVM tuning and troubleshooting experience Performance optimisation experience Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering ...

Data Engineer - DEFRA

Hiring Organisation
SR2
Location
Nationwide, United Kingdom
Employment Type
Contract
Contract Rate
£440 - £460/day Outside IR35
patterns and architectures. Experience building and supporting automated data pipelines. Familiarity with CI/CD practices and modern software engineering principles. Strong troubleshooting and performance optimisation skills. Details Outside IR35 £450 a day Remote based 6 month contract Strong likelihood of extension Please apply with a copy ...

Senior Robotics Software Engineer, Payload Integration

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Linux, RTOS, or bare‐metal development on resource‐constrained hardware. Programming Skills: Additional experience with Python, Go, or scripting for tooling and test automation. Performance Optimization: Familiarity with profiling and optimizing networked and hardware‐interfacing software. The salary range for this role is an estimate based on a wide ...

Principal Software Engineer AI Native*

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
ownership of solution delivery from specification through deployment and ongoing optimisation. Review code and ensure engineering quality, maintainability, security, and performance. Support complex troubleshooting, performance tuning, and root‐cause analysis. AI‐Native Engineering Lead adoption of AI‐assisted development tools and agentic AI workflows. Apply Spec‐Driven Development principles …/CD pipelines, Infrastructure as Code (Terraform or equivalent). Strong understanding of cloud‐native architecture and operational excellence. Strong database design and optimisation experience. Experience with relational and NoSQL databases. Understanding of complex data flows, integration architectures, and performance optimisation. Practical experience using AI‐assisted engineering tools. ...

Dynatrace Engineers (SC clearance - Inside IR35)

Hiring Organisation
LA International Computer Consultants Ltd
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
estate. - Ensure Dynatrace is integrated effectively with ServiceNow and other approved toolsets. - Maintain a comprehensive view of application, infrastructure and service dependencies. Service Monitoring & Performance Engineering - Establish end-to-end service monitoring across applications, databases, interfaces and infrastructure. - Analyse application performance, capacity and availability trends. - Identify emerging risks … bottlenecks and degradation before they impact users. - Support proactive performance optimisation and resilience improvement activities. Incident Management & Root Cause Analysis - Utilise Dynatrace AI and observability insights to detect, analyse and diagnose service issues. - Support rapid identification of root causes across complex multi-supplier environments. Other areas of responsibility ...

Infrastructure Engineer (Azure)

Hiring Organisation
Hays Technology
Location
Windsor, Berkshire, United Kingdom
Employment Type
Permanent
Salary
£50000 - £55000/annum £45,000 - £50,000
contribute to the development of cloud and hybrid architecture, ensuring systems remain secure, available and scalable. Day-to-day responsibilities will include administration and optimisation of Microsoft 365 services such as Exchange Online, SharePoint, Teams and Entra ID, alongside ownership of modern endpoint management through Microsoft Intune, including Autopilot … resolution of cloud and identity related security incidents. You will also contribute to back up, disaster recovery and business continuity planning, monitor platform performance and resilience, manage certificates and domains, and work closely with third party suppliers where required. The role includes producing clear technical documentation, contributing to infrastructure ...

Mid-Weight Level Developer

Hiring Organisation
TQR
Location
Plymouth, Devon, South West, United Kingdom
Employment Type
Permanent
Salary
£40,000
production-ready storefronts Develop and maintain custom Shopify features and components Integrate third-party apps, APIs, and services (payments, shipping, CRM, etc.) Optimise website performance, speed, and SEO Troubleshoot, debug, and maintain existing Shopify stores Collaborate with internal teams to deliver projects to deadline and specification Requirements 25 years … Experience working with Shopify themes and APIs Understanding of responsive design and cross-browser compatibility Familiarity with Git version control Awareness of SEO and performance optimisation best practices Desirable Skills Experience developing Shopify apps Knowledge of React or modern JavaScript frameworks Experience with Shopify Hydrogen or headless commerce ...

Account Manager

Hiring Organisation
17918
Location
Woking, Surrey, United Kingdom
with technical and creative delivery teams to ensure seamless client handover and ongoing satisfaction. The services you'll be selling include: SEO and website performance audits, with automated ongoing reporting. Ongoing performance optimisation to improve page speed and user experience. Google Analytics services setup, configuration, custom dashboards … offer: £45,000£50,000 basic salary OTE: £80,000, completely uncapped Hybrid working: 3 days in-office, part of a collaborative and high-performance culture Clear career progression into senior commercial/leadership roles A warm client base, a strong product set, and the autonomy ...

Senior Front End Engineer

Hiring Organisation
Halian Technology Limited
Location
Reading, Berkshire, South East, United Kingdom
Employment Type
Permanent
Salary
£85,000
deliver features from concept through to production Contribute to and evolve front-end architecture, component libraries, and shared patterns Maintain high standards across performance, accessibility, and overall user experience Support production stability and continuously improve the quality of live systems Provide technical guidance, contribute to code reviews, and mentor … TypeScript and modern frameworks such as React, Vue.js, or similar Solid front-end engineering fundamentals including: Component-based architecture State management Responsive design Accessibility Performance optimisation Internationalisation Experience with automated testing (component and end-to-end) using tools such as Playwright, Cypress, or similar Familiarity with CI/ ...

iOS Developer - 6 Months

Hiring Organisation
Stealth IT Consulting Limited
Location
United Kingdom
Employment Type
Contract
Contract Rate
£537 per day 537 Inside IR35
Design, develop, and maintain native iOS applications using Swift and the iOS SDK Integrate RESTful APIs and external services into mobile workflows Optimise application performance, including caching strategies, offline support, and API efficiency Support production releases, ensuring readiness for App Store submission Address App Store compliance issues and respond … Proven experience integrating REST APIs (or similar services) Hands-on knowledge of App Store Connect, TestFlight, provisioning, and code signing Experience with mobile performance optimisation and secure coding practices Active SC clearance Desirable: Experience working with GDS (Government Digital Service) standards Familiarity with AI platforms and APIs (e.g. ...

Android Engineer - 6 Months

Hiring Organisation
Stealth IT Consulting Limited
Location
United Kingdom
Employment Type
Contract
Contract Rate
£537 per day 537 Inside IR35
maintain native Android applications using Kotlin/Java and the Android SDK Integrate RESTful APIs and external services into mobile workflows Optimise application performance, including caching strategies, offline support, and API efficiency Support production releases, ensuring readiness for Google Play Store submission Address Play Store compliance issues and respond … Proven experience integrating REST APIs (or similar services) Hands-on knowledge of Google Play Console, app signing, and release management Experience with mobile performance optimisation and secure coding practices Familiarity with modern Android architecture components (e.g., MVVM, Jetpack libraries) Active SC clearance Desirable: Experience working with GDS (Government ...

Technical Director - OTT Delivery

Hiring Organisation
Jobleads-UK
Location
United Kingdom
Agile delivery in practice—not only in principle Fluent written and spoken English Experience leading projects across multiple regions and time zones Familiarity with performance optimisation techniques and tooling for high‐scale consumer platforms Comfort with rapid prototyping as a means of validating architectural or interaction decisions Exposure ...

Ecommerce Front End Developer (React, GraphQL)

Hiring Organisation
Hays Specialist Recruitment Limited
Location
Northampton, Northamptonshire, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £45,000 per annum
exposure to headless CMS platforms such as Hygraph* Good understanding of GraphQL and modern data fetching approaches* Understanding of PWA concepts and frontend performance optimisation* Strong communication skills, with the ability to engage non-technical stakeholders* Experience building B2B and B2C e-commerce websites is essential, interacting with ...

T-ISAC Platform Software Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
scalable workflows, automation capabilities and collaboration tools for threat intelligence sharing and enrichment. Service Reliability & Operations: Lead operational reliability through proactive monitoring, incident management, performance optimisation and secure‐by‐design engineering practices. Integration & Interoperability: Deliver and support integrations, APIs and data‐exchange capabilities that enable secure, scalable intelligence ...

Azure Data Engineer

Hiring Organisation
Vallum Associates Limited
Location
Beverley, East Riding, North East, United Kingdom
Employment Type
Contract
Azure Databricks development, including efficient handling of large datasets Strong working knowledge of Azure Data Factory for building complex ETL workflows Experience with performance optimization of data pipelines and distributed processing setups Proficiency in Scala development (hands-on experience highly desirable) Solid understanding of Azure services relevant to data ...

Senior Embedded Software Engineer

Hiring Organisation
Platform Recruitment
Location
Whittlesford, Cambridgeshire, United Kingdom
Employment Type
Permanent
Salary
£65000 - £75000/annum
Linux platforms using Yocto. Working at kernel, driver and system level on Arm-based embedded platforms. Supporting board bring-up, hardware integration, debugging and performance optimisation. Developing software for RTOS and bare-metal embedded systems. Collaborating with FPGA, electronics and multidisciplinary engineering teams across a variety of projects. Requirements ...

Principal Infrastructure Engineer

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
Yeovil, Somerset, United Kingdom
Employment Type
Contract
Contract Rate
GBP 700 - 725 Daily
networking, cloud services, and data centers. Provide technical expertise and mentorship to senior engineers and technical teams. Develop strategies for infrastructure scalability, security, and performance optimization. Oversee infrastructure migrations, upgrades, and maintenance activities with minimal disruption. Collaborate with stakeholders to define technical requirements and translate business needs into effective ...

HPC Specialist Architect - Energy Industry (AWS)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
understand HPC user requirements and map these to solutions. Preferred Qualifications Master's degree or equivalent in computer science, engineering, mathematics, or equivalent. Performance optimization experience with computationally intensive applications, particularly in oil and gas subsurface applications, reservoir simulation, and seismic data processing. Expertise in parallel programming models ...

Senior Robotics Software Engineer, Payload Integration

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Linux, RTOS, or bare‐metal development on resource‐constrained hardware. Programming Skills: Additional experience with Python, Go, or scripting for tooling and test automation. Performance Optimization: Familiarity with profiling and optimizing networked and hardware‐interfacing software. Benefits The salary range for this role is an estimate based ...

Principal Software Engineer - Data and AI - Accelerator Business

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
agents with planning, memory, and workflow orchestration Implement tools and frameworks for model versioning, experiment tracking, and lifecycle management Develop systems to monitor model performance and address data and model drift Recommend best practices for model integration and deployment patterns Design and implement effective testing strategies, including unit, component … integration, end-to-end, performance, and champion/challenger tests, establish output validation best practices, recommendations and guardrails to reduce hallucinations Ensure platform compliance with data privacy, security, and regulatory standards Mentor team members on platform design principles and best practices Guide colleagues on coding practices, design principles ...

Senior Mobile Developer

Hiring Organisation
TyneStack Partners Ltd
Location
Newcastle Upon Tyne, Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £60,000 per annum
quality cross-platform mobile applications. This is a hands-on senior development role, ideal for someone who enjoys solving complex technical problems, improving application performance and working across both mobile and backend technologies. The Role Working as part of a collaborative development team, you will: Develop and maintain commercial … resolve issues across both mobile and backend codebases. Design, develop and enhance new functionality. Build high-quality, maintainable and scalable code. Optimise application performance and improve existing components. Work closely with fellow developers to deliver projects within agreed timescales. Contribute ideas and technical improvements across the development lifecycle. Keep ...

Product Owner - Tag Management

Hiring Organisation
Jobleads-UK
Location
England, United Kingdom
designed to support great customer experiences. You’ll shape the signals that enable relevant personalisation, smoother journeys, and trusted interactions, while underpinning revenue growth, performance optimisation, and operational effectiveness. Your work turns trusted customer interactions into measurable value, driving sustained performance and long term commercial impact. What ...