1 to 25 of 35 Performance Optimisation Jobs in the City of London

looking for a C++ Trading Platform Developer to join its London-based team. This is an opportunity to work at the intersection of high-performance engineering and digital asset markets, building and scaling a global trading platform that operates across dozens of exchanges worldwide. The environment combines the technical … platform spanning multiple continents, covering: Real-time market data capture Order entry and connectivity across numerous exchanges Robust networking and monitoring systems Scaling and performance optimisation of core infrastructure The tech stack is primarily C++ and Python, running on Linux across both development and production. The focus ...

would be beneficial. Key Responsibilities: Lead front-end development across LibertyLondon.com (Salesforce Commerce Cloud) and the Fabrics site (WordPress), ensuring high standards of quality, performance, and maintainability. Translate design systems, wireframes, and high-fidelity designs into robust, scalable, and accessible front-end solutions. Own and influence front-end architectural … discovery and planning process. Design, build, and deploy MVT and A/B complex experiments using Dynamic Yield, collaborating with analytics and optimisation teams to improve conversion and usability. Support HTML email development, ensuring consistency, accessibility, and responsiveness across clients and devices. Champion front-end best practices, including performance ...

supporting AI-powered applications. Integrate Large Language Models (LLMs), AI services and machine learning capabilities into production systems. Own complex technical challenges relating to performance, reliability, scalability and system integration. Implement and support DevOps and MLOps practices to ensure robust deployment, monitoring and optimisation of AI solutions. Collaborate … deployment processes. Hands-on experience with Docker and containerisation technologies. Experience working with Kubernetes and container orchestration platforms. Familiarity with monitoring, logging, observability and performance optimisation tools. Ability to own technical solutions end-to-end from design through deployment and support. Strong stakeholder management and communication skills. Desirable ...

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 ...

NoSQL databases such as MongoDB. Knowledge of Git and version control systems. Understanding of object-oriented programming (OOP) principles. Experience with debugging, testing, and performance optimization. Preferred Skills Experience with AWS, Azure, or Google Cloud Platform (GCP). Knowledge of Docker, Kubernetes, and CI/CD pipelines. Experience with ...

define and deliver a high-impact roadmap focused on improving conversion, reducing drop-off and increasing basket value, while laying the foundations for future optimisation across Product Listing Pages (PLPs) and the wider browsing journey. What You’ll Be Doing Own the PDP Vision & Roadmap Define the long-term … quantitative insights to identify friction points and opportunities across the customer journey Build and prioritise a roadmap focused on measurable commercial impact Drive Commercial Performance You’ll own and influence key ecommerce metrics including: PDP to Bag conversion Add-to-bag rate Average Order Value (AOV) Returns reduction through ...

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 ...

Observability Develop monitoring, alerting, and operational dashboards Improve platform resilience, stability, and recoverability Design solutions for failure handling, rollback, and operational recovery Support platform performance optimisation and cost management Governance & Security Implement access controls, security policies, and governance standards Automate compliance and security enforcement through code Collaborate with ...

SMART STUDIO/Smart Schema/Recon Admin/web Connect/Control &CT tools. Solid SQL experience on Oracle Database and its performance optimization Understand complex DB objects – stored procedures, database views, triggers, and database structure. Ability to write complex SQL queries – joins, updates, scripts for analysis etc. ...

product, QA, and design. - Drive improvements in engineering standards, tools, and processes. - Identify and reduce technical debt while supporting system modernisation efforts. - Ensure strong performance, scalability, security, and reliability across platforms. - Lead or contribute to technical initiatives spanning multiple systems. - Mentor team members and support knowledge sharing and hiring … understanding of distributed systems and cloud environments (AWS preferred). - Familiarity with CI/CD pipelines, automated testing, and modern delivery practices. - Experience with performance optimisation, debugging, and observability tools. - Exposure to legacy systems and modernisation projects is advantageous. - Knowledge of secure coding practices and common security standards. ...

enabled capabilities across the mobile platform. In this role, you will: Lead the design, development, and maintenance of advanced iOS applications, ensuring high performance, quality, and responsiveness across Expedia Group’s product suite. Architect and implement robust, scalable system and API designs, including effective data modelling to support complex … maintainable iOS mobile architectures, leveraging common design patterns such as MVVM or VIPER Advanced proficiency in SwiftUI - Skilled in multi-threading, concurrency, and performance optimisation Prior experience in the search domain or travel industry, such as building or scaling search, discovery in consumer mobile apps. Experience establishing technical ...

Senior Systems Engineer | Rust 📍 London/Hybrid 💰 £140k – £250k + Performance Bonus + Equity This client is building high-performance infrastructure powering decentralised markets. The engineering environment is extremely lean, operating in domains where execution speed, system reliability, and infrastructure quality are vital. Engineers are responsible for designing … concurrent and multi-threaded systems Building integrations with external protocols and real-time networks Developing infrastructure orchestration and co-ordination systems Profiling and optimising performance-sensitive applications Designing resilient systems capable of operating under unpredictable workloads Engineers are expected to take ownership across the full lifecycle — architecture, implementation, optimisation ...

develop and maintain the software platform powering next-generation quantum computing systems. Working closely with software, hardware, and research teams, you will build high-performance, production-grade systems that directly impact customers and drive innovation. Key Responsibilities: Develop and maintain systems-level software for advanced computing platforms. Build … monitoring, and observability tooling. Lead technical projects from design through deployment. Collaborate with product, engineering, and research teams to deliver new capabilities. Improve system performance, reliability, and scalability. Skills & Experience: Essential Strong Python development experience, with C++ and/or Rust highly desirable. Experience building and supporting production systems. ...

pricing distribution and integration across the trading stack. You will: -Develop production grade object-oriented Python applications -Design scalable, resilient backend services -Improve system performance and reliability -Take ownership of defined components and services -Deliver enhancements and new functionalities -Contribute to design discussions and technical improvements -Work directly with … Essential: -Python development experience within a trading environment -Strong OO production Python -Experience building backend or distributed systems -Solid understanding of threading, concurrency, and performance optimisation -Business knowledge of at least one: Fixed Income, FX, Rates This is a PAYE contract via an Umbrella ...

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 ...

handling sensitive data Desirable Skills: Experience with modern Android architecture (e.g., MVVM, Clean Architecture) Familiarity with CI/CD pipelines and automated testing Performance optimisation and app scalability experience Experience working on high-traffic or mission-critical applications What You'll Bring: A strong focus on delivery ...

with deep hands‐on experience across Dell PowerEdge server platforms and Dell PowerSwitch networking technologies. If you thrive in environments where reliability, scalability, and performance matter, this role puts you at the centre of our datacentre and edge‐compute operations. Summary PowerEdge Server Management — Deploy, configure, and maintain Dell … Operations — Administer Dell PowerSwitch environments including S‐Series, Z‐Series, and N‐Series switches. Infrastructure Automation — Implement automation for provisioning, patching, and lifecycle management. Performance Optimisation — Monitor and tune server and network performance to meet demanding SLAs. Security & Compliance — Ensure systems adhere to security standards, hardening guidelines ...

AdTech business looking to hire an Account Manager to join their Customer Success team. This is a client-facing role focused on campaign delivery, performance management, and building strong relationships across agency and advertiser partners. You’ll play a key role in ensuring campaigns run smoothly from launch through … reporting and optimisation, while helping drive long-term client success. The Role Own and manage campaigns throughout the full lifecycle, from setup through to delivery, optimisation and reporting Act as the main point of contact for agency and client stakeholders during live campaigns Build and maintain strong relationships ...

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 ...

global platform for synthetics and financing. This is a hands-on leadership role working directly with Trading and product teams to build high-performance systems across pricing, risk and trade lifecycle. What you’ll be doing: Working closely with front office stakeholders to gather and deliver on business requirements … design and development of low-latency, event-driven systems Building scalable microservices-based applications for equity derivatives platforms Driving architecture, system design and performance optimisation Contributing across pricing, risk capture and trade lifecycle management Collaborating with global engineering teams to deliver end-to-end solutions Ensuring code quality ...

evolution of AI-enabled capabilities across the mobile platform. In this role, you will: Architect, design, and deliver advanced Android mobile solutions, ensuring scalability, performance, and maintainability across Expedia Group’s travel platforms. Lead technical direction for multi-service and cross-domain initiatives, influencing architectural decisions and setting coding … real world products. Preferred Qualifications: Strong proficiency in Kotlin Advanced proficiency with Jetpack components/Jetpack Compose, Android UI/UX best practices, and performance optimisation Deep understanding of Android app architecture patterns (e.g., MVVM, MVI, MVP) Prior experience in the search domain or travel industry, such ...

Strong understanding of secure coding practices and data protection considerations Desirable: Experience with CI/CD pipelines and automated testing for iOS Knowledge of performance optimisation and scalability in mobile apps Previous experience delivering services to large user bases What You'll Bring: A pragmatic, delivery-focused mindset ...

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 ...

that shift. What You’ll Be Doing: Build and maintain a native iOS app in Swift and SwiftUI with modern concurrency Shape the architecture, performance, and quality of a consumer-grade health platform Integrate with connected hardware via Core Bluetooth and surface insights. Own features end-to-end - from … track record shipping production apps used by real customers Experience in a regulated environment (Health or similar) Solid grasp of mobile architecture, testing, and performance optimisation Comfortable working across product, design, and engineering Excited by AI-assisted development — the team uses Claude Code extensively Why Join This ...