1 to 25 of 83 Performance Optimisation Jobs in the City of London

Google Cloud Platform (GCP) and Apigee to design and implement robust API solutions. With a strong focus on cloud infrastructure, API security, and performance optimisation, you will ensure seamless integration across enterprise systems. Your role will be pivotal in driving innovation within telecom domain projects, contributing to business … deployment and management of Anthos Service Mesh to enhance service connectivity and security. Lead cloud infrastructure projects ensuring robust and scalable solutions. API Management & Optimisation: Provide technical guidance on Apigee OPDK and Apigee X for optimised API management and performance. Develop and maintain Apigee Developer Portal and Apigee Edge ...

development projects from design through to delivery Provide technical leadership via architecture decisions, code reviews, and mentoring Ensure best practices across CI/CD, performance optimisation, security, and accessibility Collaborate with clients, Product Managers, and Business Analysts to align technical solutions with business goals Support, inspire, and develop … Developer, or similar role delivering complex Shopify projects Familiarity with modern theme build tools such as Vite.js or Webpack Strong understanding of scalable architecture, performance optimisation, and accessibility standards Experience with DevOps workflows, GitHub, and modern CI/CD pipelines Excellent communication and leadership skills Perks & Benefits Fully ...

safety-critical applications and collaborate closely with back-end engineers and designers. Working closely with back-end engineers and designers, you’ll contribute to performance optimisation, maintain clean and well-documented code, and help shape the overall front-end architecture Key Responsibilities Develop new user-facing features using … React.js Build reusable components and front-end libraries Translate designs and wireframes into high-quality, maintainable code Optimise components for performance across devices and browsers Collaborate with back-end developers and designers to improve usability Write clean JavaScript following modern React.js workflows Troubleshoot UI issues and debug application 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 ...

paced, agile software development environment. You will learn and incorporate Russell IT standards, tooling, and practices while working to improve the software code quality, performance, and delivery. The responsibilities of the individual in this position include: Software Development: Writing high-quality, maintainable code that adheres to coding standards … best practices. Developing and maintaining software applications, features, and components. Debugging and fixing software defects, performance issues, and other technical problems. Designing and implementing software solutions that meet project requirements. Architecture and Design: Participating in the architectural and system design of software projects. Providing technical leadership and guidance ...

internal engineering practices What We’re Looking For Strong hands-on software engineering experience in Kotlin (Backend) Solid understanding of JVM internals, concurrency, and performance optimisation Experience building distributed systems, microservices, or event-driven architectures Knowledge of frameworks such as Spring Boot , Micronaut , or Ktor Familiarity with cloud ...

data augmentation. Automation: Implement automation tools and frameworks (CI/CD) to streamline the deployment and monitoring of machine learning models in production. Performance Optimisation: Optimize data processing workflows and storage solutions to improve performance and reduce costs. Collaboration: Work closely with cross-functional teams, including data ...

reviews, write unit tests, and ensure adherence to development standards Work collaboratively within Agile teams, contributing to sprint planning and estimations Support bug fixing, performance optimisation, and integration testing Release & Deployment Provide build and release documentation to DevOps and QA teams Support smooth deployment cycles and quality assurance ...

microservices, event-driven architectures, APIs, serverless and containerised workloads. Drive high-quality engineering standards including automated testing, TDD/BDD, CI/CD, observability, performance optimisation and security. Support DevOps maturity by ensuring robust pipelines, IaC, automated deployments, and consistent cloud environments. Provide mentorship, coaching, and capability uplift ...

feature extraction, transformation, and model training. Deployment & Monitoring: Implement models into production environments using MLOps best practices (CI/CD, containerization, monitoring). Performance Optimization: Continuously improve model accuracy, latency, and scalability. Collaboration: Work cross-functionally with product managers and engineers to align ML solutions with business objectives. Documentation ...

Node.js, TypeScript, React , and modern cloud engineering Hands-on experience with AWS serverless , particularly Lambda, Step Functions, DynamoDB Solid understanding of scalable architecture and performance optimisation Experience in scale ups, startups, or SMEs where speed, ownership, and adaptability matter Strong debugging, problem solving, and delivery skills Interest ...

with your primary focus on: 🌳 SPA architecture and front-end design - VUE.JS, Angular, Javascript, React.JS 🌳 Complex, data-rich user interfaces 🌳 Modern JavaScript frameworks 🌳 Usability, performance, and maintainability at scale You’ll still collaborate closely with backend engineers, but your ownership sits firmly on the UI and client-side experience … . Teams may focus on: 🌳 Major UI modernisation initiatives 🌳 New front-end modules and workflows 🌳 Large DOM/high-interaction interfaces 🌳 Performance optimisation and UX refinement 🌳 Design system evolution and component architecture Focus areas rotate annually, offering long-term growth and variety. What You’ll Do 🌳 Lead ...

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 … 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 ...

infrastructure and tooling to enable deployment, monitoring, and retraining of ML models Work across the full AI delivery lifecycle, from architecture and integration to performance optimisation Collaborate with customers and stakeholders to understand operational constraints and align on solution design Mentor junior engineers and shape internal technical standards ...

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 ...

technical direction for the front-end, champion best practices, and still enjoy being hands-on. Someone who obsesses over clean design, performance and scalability, and is comfortable leading from the front. The Opportunity You’ll be the go-to technical leader for front-end engineering within a cross-functional … reviews – and your voice will carry weight in how the platform evolves. What You’ll Do Lead the design and development of complex, high-performance React applications using React, TypeScript and modern front-end libraries. Define and drive front-end architecture, standards and best practices , ensuring quality, consistency ...

join a company where your work genuinely matters. This is a role for engineers who are passionate about React , committed to building intuitive, high-performance interfaces, and excited about delivering cross-platform experiences using React Native . You'll play a key role in shaping the UI across both … design system. The team values engineers who are curious, collaborative, and eager to explore new ways of solving complex challenges, whether that’s improving performance, enhancing accessibility, or leveraging tools like Storybook, Vite, and cutting-edge AI workflows. As a senior engineer, you’ll help define the future ...

infrastructure. Collaborate with Marketing, Design, and external partners on new website initiatives and campaigns. Review and guide third-party development work to ensure consistency, performance, and security. Contribute to long-term decommissioning and migration projects within the web platform. Build tools and workflows that enable Marketing teams to manage … experience with Next.js and modern frontend best practices. Strong foundation in web UI development (HTML, CSS, responsive design). Good understanding of frontend security, performance optimisation, and accessibility. Ability to clearly document and communicate technical decisions. Experience maintaining or reviewing production systems operating at scale. Nice to Have ...

C++ Developer We are a fast-growing, technology-driven brokerage specialising in high-performance trading systems and low-latency market connectivity. Our team builds robust, scalable, mission-critical software that powers real-time trading across global markets. We are looking for a talented C++ Developer to join our engineering … business at the forefront of the industry. The Role As a C++ Developer, you will play a key role in the design, development, and optimisation of our trading and market-data platforms. You’ll work closely with traders, quantitative analysts, and other engineers to build highly performant solutions that ...

SageMaker, EKS, batch & Real Time inference. Data pipelines: Spark/SQL, orchestration (Airflow), monitoring for drift/perf. Nice to Have Cost/performance optimisation on AWS; GPU scheduling; quantisation/distillation. Experience working within Financial Services engineering standards and governance. IND_PC3 Guidant, Carbon60, Lorien ...

heads-down coder” type. Top 4 Core Skills Python — workflow automation, data processing, and ETL/ELT development. Snowflake — scalable data architecture, performance optimisation, and governance. SQL — expert-level query writing and optimisation for analytics and transformations. dbt (Data Build Tool) — modular data modelling, testing, documentation ...

Divi Build and refine responsive layouts for key pages (homepage, services, campaigns, team profiles, client stories, insights) Optimise images, videos and other media for performance and usability Configure and test forms and basic CRM integrations to ensure enquiries route to the right people Improve navigation, tagging and content structure … make it easier for users to find relevant information Support ongoing site improvements , including readability, accessibility and performance You’ll gain exposure to how a professional services firm uses digital to communicate with clients, prospects and partners, and you’ll be involved in real, visible changes to the site. ...

Responsibilities Strategy & Roadmap: Define and own the roadmap for Card Payments and Failed Payment Recovery, ensuring alignment with commercial priorities and regulatory compliance. Performance Optimisation: Proactively dive into payment performance data to identify friction points, uncover issuer behaviours, and design experiments to maximise authorisation rates. Intelligent Solutions ...

data fabric platform. This platform underpins critical data flows, analytics, and operational systems for a global investment bank. You will work in a high-performance environment, collaborating with cross-functional teams to ensure the seamless integration, processing, and availability of enterprise data. The role will involved a good … house data fabric using C#. • Data Integration: Build APIs and services to enable seamless data exchange across trading systems, risk engines, and analytics platforms. • Performance Optimization: Enhance the performance of data pipelines, ensuring low-latency processing for real-time analytics and decision-making. • Architecture Design: Contribute ...

requirements into scalable, maintainable code Collaborate with product managers, designers, and engineers to deliver end-to-end solutions Solve complex challenges related to scalability, performance, and reliability Contribute to engineering best practices, tooling, and processes Required Experience 3+ years of experience building full-stack applications Experience developing enterprise SaaS … ORMs (e.g., Sequelize) Strong frontend experience with React and modern UI frameworks Experience working with relational (MySQL) and NoSQL databases Strong debugging, troubleshooting, and performance optimisation skills Technical Skills Backend: TypeScript, NestJS, Sequelize, REST APIs, GraphQL, MySQL, NoSQL, Kafka Frontend: React, Next.js, TypeScript, Chakra UI, React Query, GraphQL ...