1 to 25 of 31 Performance Optimisation Jobs in the City of London

sites, covering core transaction journeys such as product display, shopping cart, checkout payment, user centre and marketing campaigns. You will lead frontend architecture optimisation, performance improvement and internationalisation adaptation, collaborate with product, design and backend teams to support business iteration across the UK and Europe, and ensure user … Responsibilities 1.Conduct requirement reviews, solution design and code development for e-commerce web and H5 platforms, ensuring delivery quality and project progress; 2.Lead frontend performance optimisation, loading speed improvement and multi-device compatibility adaptation to enhance user interactive experience; 3.Build and maintain frontend component libraries and engineering systems ...

sites, covering core transaction journeys such as product display, shopping cart, checkout payment, user centre and marketing campaigns. You will lead frontend architecture optimisation, performance improvement and internationalisation adaptation, collaborate with product, design and backend teams to support business iteration across the UK and Europe, and ensure user … Responsibilities 1.Conduct requirement reviews, solution design and code development for e-commerce web and H5 platforms, ensuring delivery quality and project progress; 2.Lead frontend performance optimisation, loading speed improvement and multi-device compatibility adaptation to enhance user interactive experience; 3.Build and maintain frontend component libraries and engineering systems ...

digital services Integrate frontend applications with backend APIs Participate in code reviews and contribute to engineering best practices Troubleshoot and resolve application defects and performance issues Contribute to Agile ceremonies and collaborative delivery planning Ensure applications meet accessibility, usability, and quality standards Essential Skills & Experience JavaScript (Essential) Strong commercial … industry best practices React (Essential) Proven hands-on experience with React Strong understanding of: Functional components React Hooks Component composition State management Context API Performance optimisation techniques Experience developing scalable single-page applications (SPAs) Ability to build reusable, maintainable component libraries TypeScript (Essential) Strong commercial experience developing applications ...

This role offers the chance to deepen your expertise in C# and .NET within a highly technical team working on complex, performance-led systems. You will take on greater ownership while continuing to grow in a collaborative environment. The Company They are a growing, data-focused organisation with … Develop and enhance C# .NET applications across multiple systems • Work on both greenfield projects and improvements to existing platforms • Contribute to system design and performance optimisation • Collaborate with cross-functional teams to deliver technical solutions • Support and mentor more junior engineers where appropriate Your Skills & Experience • Strong commercial ...

applications and AI-driven platforms. You'll work closely with frontend engineers, product teams, data scientists and stakeholders to deliver robust, secure and high-performance solutions. The role combines backend engineering, cloud infrastructure, API development and MLOps, making it ideal for someone who enjoys working across the full software … models in production environments, ensuring reliability, scalability and performance. Integrate machine learning models into backend systems and expose model capabilities through APIs. Optimise database performance, schemas and queries across SQL and NoSQL environments. Implement authentication, authorisation and security best practices across backend services. Collaborate closely with frontend engineers ...

skilled Quantitative Developers (PhD level) to join leading banking institutions in London. The role focuses on building robust quantitative models, analytics platforms, and high-performance systems to support trading, risk management, and pricing functions across asset classes. 🎯 Key Responsibilities Design, develop, and implement quantitative models for pricing, risk … complex financial models into scalable production-grade code Collaborate closely with Front Office, Trading, Risk, and Research teams Enhance and maintain low-latency, high-performance systems Perform model validation, backtesting, and optimisation Contribute to architecture design of quant libraries and analytics platforms Ensure best practices in software engineering ...

Generative AI tooling Owning the implementation of ML pipelines, APIs and data integration workflows Enforcing MLOps best practices, coding standards, version control and performance optimisation Collaborating cross-functionally with data scientists, product managers, platform engineers, QA and audit professionals Mentoring junior engineers and contributing to internal capability-building ...

pure PM role — we need someone who genuinely understands code, can earn the trust of engineers, and can hold a technical conversation about architecture, performance, and trade-offs. You will take ownership of a growing portfolio of in-house software platforms used across all businesses connected to PEN Group. … full production with real user load Cloud or serverless deployment experience (AWS, GCP, Azure, or Vercel/similar) Database schema design and query performance optimisation Familiarity with AI/ML tooling or LLM integrations in production systems SaaS, CRM, or enterprise platform experience Agile or Scrum certification (though ...

Full Time, 37.5 hours per week Contract Type: Permanent Number of roles: 1 Salary: £40,000 per annum We're looking for a Web Optimisation and Delivery Manager to join our team. Role Summary Responsible for global web performance strategy and outcomes, setting priorities, standards and success measures … combining hands-on leadership and delivery, with enablement of destination teams. Work is based on evidence-based optimisation (including SEO/GEO/content design) strategies, priorities, standards, and success measures, while ensuring needs are effectively translated into day-to-day delivery across websites and acquisition journeys. Accountable ...

such as PIM, OMS, SAP CRM and CDN services. Configure, optimise and maintain Algolia search, including indexing strategies and fallback mechanisms. Ensure applications meet performance, scalability and security best practices. Support incident resolution, performance optimisation and platform stability throughout testing, deployment and hypercare phases. Work with MuleSoft … implementation and optimisation. Experience integrating enterprise platforms such as PIM, OMS and SAP CRM. Understanding of CI/CD pipelines, cloud deployments and application performance tuning. Excellent communication, analytical and problem-solving skills. Desirable Skills/Experience Experience delivering large-scale retail or eCommerce platform transformation projects. Knowledge ...

that support real-world trading strategies. As a senior member of the team, you will contribute both technically and strategically, helping shape development standards, performance optimisation, and system scalability. You will primarily work within a C# .NET SQL Server ASP.NET ecosystem, developing high-performance, reliable, and maintainable … applications. Key Responsibilities Design, develop, and maintain high-performance applications in C# and .NET Lead architectural discussions and contribute to technical direction Build scalable, reliable systems to support automated trading and research Develop and optimise database solutions (SQL Server or equivalent) Improve performance, reliability, and automation across systems ...

data pipelines and data platform solutions Business Intelligence, analytics and reporting environments Data warehousing, data lakes and modern data architectures Data quality, governance and performance optimisation Working within complex or regulated environments Youll also need practical exposure to AI or Machine Learning initiatives, including areas such ...

tech status quo and lead modernisation, automation, and innovation initiative Build high-quality, reusable, and scalable backend systems Analyse system-wide dependencies, bottlenecks, and performance Define and implement engineering best practices, standards, and processes Lead design reviews and contribute to governance and architecture forums Balance priorities across technical debt … Node.js, or Python) Proven experience designing and building distributed systems Deep understanding of system design, OOP, and design patterns Experience building high-performance, low-latency, scalable systems Strong knowledge of microservices & monolith architectures Experience with CI/CD pipelines and automation Hands-on experience with Kubernetes, containerisation, Helm/ ...

4+ years as a Solutions Architect designing and delivering Big Data solutions for enterprise clients Deep expertise in Apache Spark and distributed computing including performance optimisation and streaming Hands-on coding ability in Python, PySpark, and/or Scala Strong working knowledge of the Databricks Lakehouse Platform Experience ...

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 ...

leadership, escalation support, and operational oversight for core enterprise infrastructure, including VMware, Windows Server, Active Directory, DNS, and DHCP Drive infrastructure design, capacity planning, performance optimisation, root cause analysis, and continuous service improvement Participate in an on-call rota and collaborate across teams to maintain service availability ...

core infrastructure that powers large-scale data ingestion, processing, and distribution across the business. The Role You will work on distributed systems and high-performance backend services that support real-time messaging, large-scale data processing, and distributed storage. The role offers the opportunity to influence architecture, drive technical … scalable distributed systems and backend services Build infrastructure supporting large-scale data ingestion and processing Contribute to system architecture and technical design decisions Improve performance, reliability, and operational efficiency Collaborate with engineers and stakeholders across the organisation Mentor engineers and promote engineering best practices Requirements 7+ years of software ...

looking to work on problems that genuinely test the limits of performance, scale, and engineering craft? We are building a small, elite team of systems engineers to design and evolve the core infrastructure that powers a highly sophisticated trading platform. This is not application level development. This is deep … work on performance critical systems where nanoseconds matter, correctness is non negotiable, and your decisions directly impact real world outcomes. You will be working on the foundations of the trading stack, including market data, execution, simulation, and internal infrastructure. The problems are hard, the standards are high ...

skilled network engineers, define the enterprise networking roadmap, and collaborate with cross-functional teams — including Security, Infrastructure, and IT Operations — to deliver a high-performance, high-availability network platform that underpins mission-critical business and customer operations. Key Responsibilities Strategic Leadership Define and execute the strategic vision for enterprise … continuous improvement initiatives, driving innovation, automation, and standardisation in network design and operations. Architecture, Design & Delivery Oversee the end-to-end design, implementation, and optimisation of LAN, WAN, SD-WAN, VPN, and wireless solutions across all environments. Manage enterprise routing, switching, VLAN segmentation, firewall policies, telephony systems (ISDN/ ...

people genuinely love what they work on Friendly, tight-knit engineering culture Flat structure with clear and achievable progression Exposure to cutting-edge tooling, performance optimisation, and large-scale systems ...

live support. Youll develop robust backend services and API orchestration to underpin production-grade AI applications, and ensure operational excellence through monitoring, error handling, performance optimisation and Azure-based deployments. Responsible AI practices are embedded from the start - guardrails, controls, governance not bolted on at the end. Youll ...

APIs, including SOAP, REST, WSDL, and related standards. Strong technical expertise in XML and Java. Experience supporting interface technologies, networking, data warehousing, and performance optimisation. Proven ability to work with third-party vendors and external partners on integration and data-related initiatives. Personal Attributes Strong analytical, troubleshooting, and problem ...

global engineering team building a cutting-edge financial mark et trading platfo rm. This role offers the opportunity to work on a high-performance, real-time syst em used for pricing, execution, and trade processin g.You will collaborate with cross-functional teams across locations and play a key role … owners, and global engineering teams. Break down complex projects, drive delivery, and mentor junior developers. Ensure adherence to best practices in coding, design, and performance optimisation. Contribute to continuous improvement of development processes and technical road map. Tech Stack & Requirements Core Skills 7+ years of experience in backend development. ...

ability to design and implement production-grade services. Solid experience working with relational and document-oriented databases (SQL and NoSQL), including data modelling and performance optimisation. Experience building and operating containerised applications (e.g., Docker, Kubernetes), with a clear understanding of deployment, runtime behaviour, and production operations. Strong understanding … communication skills, able to engage across engineering, product, and senior business stakeholders. Nice to have: Experience with distributed caching solutions and patterns to improve performance and scalability in high-throughput systems. To find out more about Huxley, please visit (url removed) Huxley, a trading division of SThree Partnership ...

gateways, and third-party vendors Ensure compliance with SCA/PSD2, 3DS, PCI-DSS , and fraud prevention standards Support UAT, go-live, and ongoing performance optimisation Required Experience Proven experience as a Payments Product Owner/Manager focused on online payments Strong track record delivering PSP/gateway … Ecommerce payment flows (checkout, tokenisation, recurring payments) Card schemes (Visa, Mastercard, Amex) Digital wallets (Apple Pay, Google Pay) 3DS/SCA/authentication optimisation Payment decline management and retry logic Settlement, reconciliation, and chargebacks Experience improving checkout conversion and payment success rates Strong Agile delivery and stakeholder management experience ...