1 to 25 of 34 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 ...

introducing Flutter across embedded entertainment devices. We are looking for an engineer who can operate beyond application development and contribute to platform architecture, performance optimisation, and embedded runtime engineering. This is a highly technical role focused on device-side software, platform scalability, and developer experience across a large … Working On Developing and optimising Flutter-based experiences for embedded devices Contributing to the evolution of a large-scale Entertainment OS platform Improving runtime performance, memory usage, rendering efficiency, and startup times Working closely with platform, UI, and embedded software teams Supporting the migration of legacy frameworks and applications ...

full software delivery lifecycle Improving engineering efficiency by identifying bottlenecks and introducing better workflows, automation, and tooling Contributing to architecture decisions, scalability improvements, and performance optimisation Driving best practices across code quality, testing, CI/CD, and engineering standards Working closely with frontend applications and customer journeys ...

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 ...

functioning as a traditional media agency, it positions itself primarily as a technology company that provides automated tools and infrastructure for programmatic advertising, campaign optimisation, and AI-driven media planning. However, its offering also overlaps with media operations and performance marketing services, making it closer to a hybrid … adtech and media solutions company. Key Responsibilities of the role Lead strategic planning across digital media, programmatic, and performance marketing initiatives Develop commercial growth strategies for both clients and internal business expansion Act as a senior strategic advisor to key stakeholders and partners Translate market trends, audience insights ...

primary technical leader and engineer within the team. Provide technical oversight for analysis, design, and delivery of complex systems. Architect and develop high-performance, scalable, and robust solutions for Communications Surveillance and Record Keeping. Ensure adherence to best practices, including architecture reviews, vendor analysis, cross‐functional impact assessment … automated testing. Mentor and coach other team members to achieve optimum performance and career growth. Drive innovation by evaluating new Surveillance and Record Keeping technologies and methodologies. Communicate technical concepts effectively to both technical and non‐technical stakeholders. Support planning, estimation, and prioritisation of work using agile methodologies. Identify ...

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 ...

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. ...

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 ...

Senior Frontend Developer with strong experience in TypeScript and React Native to join our development team. In this role, you will build scalable, high-performance web applications and work closely with cross-functional teams to deliver outstanding user experiences. This is initially a six-month contract with potential … closely with UX/UI designers to deliver intuitive and engaging interfaces Write clean, efficient, and maintainable code following best practices Optimise applications for performance and scalability Participate in code reviews to ensure high development standards Troubleshoot and resolve issues across development and production environments Contribute to architectural decisions ...

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 ...

Docker), and JVM tuning for containerized workloads. Observability & Operations: Application instrumentation (metrics, distributed tracing, structured logging) and production support in high‐availability environments. Data & Performance: Data modeling, SQL/NoSQL databases, caching strategies, and performance optimization in latency‐sensitive systems. Security: Enterprise security patterns; authentication protocols, mutual ...

Collaborating closely with Product, Design, Backend, QA, and DevOps teams to deliver new features and enhancements Troubleshooting and resolving issues to ensure optimal app performance, security, and quality Participating in code reviews, architecture discussions, and staying updated with the latest iOS technologies and Apple guidelines Managing your workload independently … Proven experience in building and maintaining iOS applications with Swift and/or Objective-C Strong understanding of iOS development best practices, security, and performance optimisation Excellent communication skills and the ability to work collaboratively across teams Ability to manage tasks independently and contribute to technical discussions Familiarity ...

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 ...

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 ...

development and experience progressing into senior SAS platform administration and leadership roles. You will be responsible for platform installation, migration, upgrades, monitoring, support, and performance optimisation across complex SAS environments. Key Skills & Experience Strong hands-on experience with SAS 9 and SAS Viya 4 Proven experience delivering … platform installations, migrations, upgrades, and support Strong troubleshooting skills across configuration and performance issues Experience working within large enterprise environments Ability to lead technical delivery and provide platform best practice guidance Client-Specific Experience Experience configuring, testing, and troubleshooting SAS/Hadoop connectivity and performance issues Experience supporting ...

development, testing, and maintenance of low-latency Java applications. - Collaborate with cross-functional teams to gather requirements and design system architecture. - Optimize application performance and troubleshoot latency issues. - Mentor junior developers and ensure adherence to best coding practices. - Participate in code reviews and provide constructive feedback. - Stay updated with … Science, Engineering, or a related field. - Proven experience in Java development, with a focus on low-latency systems. - Strong understanding of multithreading, concurrency, and performance optimization. - Experience with frameworks and libraries such as Spring, Hibernate, and Netty. - Familiarity with distributed systems and network protocols. - Excellent problem-solving skills ...

teams to ensure design to run alignment. Reliability, Capacity & Resilience Design DC architectures for high availability, redundancy, DR, and fault tolerance. Support capacity planning, performance optimisation, and lifecycle management. Participate in failure analysis, RCA reviews, and corrective architecture enhancements. Ensure infrastructure designs minimise single points of failure. Operational ...

migrating from an on-premise Oracle estate to a modern data platform built on cloud and Databricks. This role leads the design, implementation, and optimisation the Data Mart and migration processes, ensuring alignment with enterprise data architecture and compliance standards. Core Responsibilities Databricks/Modern Data Platform Engineering Lead … Data Marts using Databricks (SQL/Python). Follow engineering best practices including version control, CI/CD, orchestration, and environment management. Ensure governance, performance optimisation. Legacy Oracle Migration Leadership Lead and coordinate the migration of data assets from Oracle database systems to the modern cloud data platform. Oversee ...