1 to 25 of 46 Performance Optimisation Jobs in the City of London

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 ...

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 ...

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 ...

3+ years of software engineering experience, preferably focused on market-data infrastructure or quantitative trading systems. Strong Python expertise with a solid grasp of performance optimisation and concurrency. Proven experience designing, building, and tuning tick-data pipelines for high-volume environments. Hands-on experience with Parquet storage; experience … orchestration platforms (Kubernetes). Strong background in profiling, debugging, and optimising complex data workflows. Experience with timeseries databases (KDB, OneTick) and/or performance-critical C++ components. Deep understanding of financial markets, trading data, and quantitative workflows. Excellent communication skills with the ability to articulate technical solutions to engineers ...

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 ...

Technical Leadership Lead the design and implementation of key features and components of our React Native mobile application. Make informed technical decisions that improve performance, reliability, and scalability. Participate in architectural discussions and help shape the technical direction of mobile applications. Provide support and unblock engineers during development, testing … standards are upheld. Help foster a healthy engineering culture based on learning, knowledge sharing, and accountability. Engineering Quality Champion strong testing, code quality, and performance practices. Knowledge of best practices in security, performance and accessibility Identify areas for improvement within the codebase and contribute to long-term maintenance ...

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 ...

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 ...

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 ...

Fixed Income eTrading including Rates, Credit, and Bonds. You'll work closely with world-class technologists and domain experts to deliver scalable, high-performance UIs that support real-time trading and analytics. Key Responsibilities Design and develop responsive, low-latency front-end trading systems using React. Build dashboards … data and trade execution. Collaborate with traders, quants, and back-end engineers to deliver seamless UI experiences. Contribute to architectural decisions and front-end performance tuning. Required Skills & Experience Expertise in React.js and modern JavaScript (ES6+) Proven experience delivering front-end applications in electronic trading environments Strong understanding ...

seeking a Junior Rust Developer to join its front-office technology team in London. The successful candidate will work on low-latency, high-performance systems that directly support 24/7 trading operations, collaborating closely with senior engineers and trading stakeholders. Key Responsibilities Maintain and enhance peripheral applications … years of relevant development experience in a Linux environment Strong working knowledge of Rust (essential) Proven interest in low-latency systems and performance optimisation Degree in Computer Science, Software Engineering, or a related discipline Strong interest in financial markets and blockchain technologies This position offers a competitive compensation ...

cloud migration and platform modernisation for SaaS and data-heavy workloads; strengthen security and compliance (GxP, ISO27001, SOC2, HIPAA); implement SRE practices, observability and performance optimisation; act as a cloud SME across portfolio companies; advise CTOs and founders on cloud roadmaps and risk. What You Bring: 5+ years ...

Strong proficiency across Python/TypeScript/Golang (or equivalent polyglot stacks) with proven ownership of production-grade systems. Expertise in real-time systems, performance optimisation, fault tolerance and scalable architectures under uncertainty. Experience with financial protocols, market data feeds, order matching or compute infrastructure is a strong ...

users. In this role, you'll provide authoritative guidance and best practices across critical areas including marketing automation architecture, customer data platforms, omnichannel personalization, performance optimization, and governance frameworks. This is a project leadership position where you'll shape transformative Salesforce solutions for retail clients, ensuring that technical decisions ...

ideal candidate will have deep expertise in Java and PHP ecosystems , strong architectural skills, and proven experience in building scalable, secure, and high-performance solutions. This role involves technical leadership, strategic decision-making, and mentoring teams . Key Responsibilities Architectural Design & Strategy Define and implement scalable, secure, and maintainable … code reviews and ensure adherence to quality standards. Development & Integration Oversee microservices architecture , RESTful APIs, and integration with third-party systems. Ensure high availability, performance tuning, and security compliance . Collaboration Work closely with stakeholders, product managers, and cross-functional teams . Participate in Agile ceremonies (sprint planning, retrospectives ...

Developer before moving into Product Ownership Technical proficiency:Familiarity with Azure services (e.g., Data Lake, Synapse, Fabric) and Databricks for data engineering, analytics, performance optimisation, and governance. Experience with implementing and optimising scalable cloud infrastructure is highly valued. Backlog management:Demonstrated expertise in maintaining and prioritizing product backlogs ...

Gold layer curation. Expertise in Power BI, including: Intermediate DAX Star schema modelling and semantic model design Report UX/UI best practices Performance optimisation Hands-on experience with Microsoft Fabric features such as Lakehouse, Data Warehouse, dataflows, and semantic models. SQL skills for data exploration, transformation ...

power rich user experiences. Rapidly shaping UI concepts through prototypes and iterative design. Ensuring reliability through comprehensive unit testing and a strong focus on performance optimisation. Enhancing, maintaining and supporting existing features with robust monitoring and alerting. Collaborating with cross-functional teams in a matrix environment and guiding development ...

Code and automation principles, using tools such as Ansible and Python , and integrating with configuration management systems. Drive operational excellence , including platform hardening, performance optimisation, and security compliance. What We’re Looking For Strong experience designing and delivering large-scale VMware virtualisation platforms , with hands-on VCF exposure ...

tasks to align with business objectives. Technical Expertise Skilled in managing ServiceNow upgrades, patches, and system integrations. Strong troubleshooting capabilities for complex issues and performance optimization. Proficient in scripting (JavaScript, Glide API, Script Includes, Business Rules). Experienced in workflow and automation tools (Flow Designer, UI Policies, Scheduled Jobs ...

models in Azure. • Data Pipelining: Build and optimize scalable data pipelines for ingesting, transforming, and preparing large datasets for AI model training and inference. • Performance Optimization: Optimize AI models and their serving infrastructure for performance, cost-efficiency, and scalability. • Collaboration: Work collaboratively with data scientists to operationalize models ...

make sure you’re a good fit for the role: Key Responsibilities Lead the architecture, design, and development of scalable, high-performance web applications using React and TypeScript . Define and execute the front-end technical strategy , ensuring scalability, performance, and alignment with product and AI goals. Collaborate … applications. Mentor other engineers, promoting excellence in coding practices, architecture decisions, and technical problem-solving. Establish and enforce standards for code quality, accessibility, performance optimization, and testing . Partner with backend and DevOps teams to optimize CI/CD pipelines and deployment processes. Continuously identify opportunities ...