23 of 23 Performance Optimisation Jobs in the City of London

deliver scalable, high-performing features, while mentoring a team and helping drive innovation across the platform. Role and Responsibilities: Lead the design, development, and optimisation of high-performance, cloud-based software solutions Partner with Technical Design Authority to shape system architecture, APIs, and data models Ensure secure, scalable … integration with databases, third-party APIs, and messaging services Drive performance optimisation, reliability, and robust data integrity standards Mentor developers, promote Agile best practice, and elevate engineering standards Participate in on-call rota and act as escalation point for critical incidents Skills and Experience: 5+ years’ software development ...

front-end and web engineers (React) across a mix of seniority levels. Own people management responsibilities including hiring, onboarding, line management, performance management, coaching, mentoring, and career development. Foster a collaborative, inclusive, and high-performance team culture focused on continuous improvement and psychological safety. Technical Leadership & Delivery Provide … modern web technologies, including JavaScript, HTML, CSS, and React-based frameworks . Strong understanding of modern front-end architecture, including state management, routing, navigation, performance optimisation, module federation, microservice architecture and accessibility standards. Experience designing and maintaining CI/CD pipelines , using version control effectively, and working within ...

agile team of 5-7 mobile engineers (React Native) across a mix of seniority levels. Own people management responsibilities including hiring, onboarding, line management, performance management, coaching, mentoring, and career development. Foster a collaborative, inclusive, and high-performance team culture focused on continuous improvement and psychological safety. Technical … mobile SDLC. Proven experience of REST/GraphQL API integration with mobile applications Solid understanding of mobile application fundamentals: iOS/Android app lifecycle, performance constraints and release management Proven hands-on software engineering background across modern mobile technologies e.g. cross platform/native development. Strong understanding of modern ...

client is looking for an experienced ML Infrastructure Engineer to support the deployment, optimisation and scaling of advanced machine learning models in production environments. This role sits at the intersection of research and engineering, focused on ensuring models are reliably transitioned from experimentation through to large-scale deployment. … will work closely with research and platform teams to build and maintain high-performance inference systems, improve deployment processes and help drive infrastructure improvements that enable faster model iteration and release cycles. This is a strong opportunity to work on technically complex challenges within a fast-moving and highly ...

experience with PyTorch Experience with Hugging Face transformers or similar frameworks Solid experience deploying ML solutions on AWS Understanding of MLOps, model deployment and performance optimisation Ability to work in a consultancy environment with multiple clients Desirable: Experience with LLMs, RAG pipelines or generative AI applications Knowledge ...

quality benchmarks for AI initiatives. Own technical estimations, feasibility assessments, and delivery quality across AI workstreams. Lead technical troubleshooting, root cause analysis, and performance optimisation. Collaborate closely with architecture, product, and DevOps teams to embed AI into larger ecosystems. Continuously assess and introduce new AI tools, frameworks, and approaches ...

building robust, scalable infrastructure to support a growing ecosystem of data products and services. What You’ll Be Doing: Designing and developing scalable, high-performance backend services in Go (Golang) Leading the technical direction of key projects, making decisions around architecture, performance and maintainability Integrating multiple external data … writing clean and maintainable production-grade code Proficiency with PostgreSQL and Redis, or similar relational and in-memory databases Strong understanding of performance optimisation, observability and reliability best practices Excellent communication skills and the ability to convey complex technical concepts clearly Nice to Have: Experience building websocket services ...

providing Python-based solutions that directly impact the profitability of the business. This is an exciting opportunity to work in a fast-paced, high-performance environment where you can push the boundaries of technology in financial markets. Key Responsibilities: Design, develop, and maintain highly efficient Python-based applications … commodities trading, risk management, and real-time data analysis. Build scalable, high-performance data pipelines to process large datasets from multiple sources, including real-time market data and fundamental data. Implement robust APIs and microservices to integrate trading systems, analytics platforms, and external data providers. Optimize performance ...

machine learning models using Python 📊 Work with large, complex datasets to support AI-driven products and insights 🧠 Assist with feature engineering, model experimentation, and performance optimisation ☁️ Contribute to data and ML pipelines in cloud-based environments 🗄 Work with structured and semi-structured data using SQL 🚀 Support the deployment ...

secure, and performant while driving improvements across infrastructure, automation, and operational workflows. Key Responsibilities Maintain and improve production services with a focus on reliability, performance, and operational excellence Own and enhance Azure‐based infrastructure, ensuring clean, scalable, and well‐documented environments Lead improvements across CI/CD, IaC, monitoring … operational tooling Troubleshoot and optimise traffic routing, security, and performance across Azure networking components Contribute to continuous improvement initiatives, reducing toil and increasing automation Collaborate with engineering teams to ensure best practices are followed across deployments and service operations Essential Skills Azure DevOps – broad experience across pipelines, repos, service ...

Contribute meaningfully to product and architecture discussions; be heard in debate and align to unified decisions. Own operability: CI/CD, monitoring/alerting, performance optimisation, safe rollbacks. Build and integrate AI features (LLM/agent workflows, RAG/vector DB integration, eval hooks, cost/safety guardrails ...

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 ...

Data Engineering 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 Development Framework experience within Microsoft Stack Technologies Experience with implementing and optimising scalable cloud infrastructure is highly valued Backlog management ...

driven product increments Solid understanding of value-based prioritization and product strategy in a data-driven context Advanced Power BI expertise, including dashboards, DAX, performance optimization, and row-level security Working knowledge of enterprise data products, semantic models, and data governance Understanding of modern data platforms and analytics ecosystems ...

Unreal Developer will join the wider Unreal and asset team to take on the core technical challenges around the dynamic pipeline and real-time performance: Writing and optimising C++ to handle dynamic model ingestion from the external app into Unreal Working with automated CAD-to-Unreal data workflows Authoring … working with CAD data within Unreal Engine Good knowledge of shader programming and high-end material authoring Familiarity with Pixel Streaming and real-time performance optimisation If you're a Senior Unreal Developer and skills and experience align with the role, click apply. ...

governance of RESTful APIs, JSON, and HTTP standards API versioning and backward‐compatibility strategies MongoDB/NoSQL expertise, including: Data modeling Indexing strategies Performance optimization Advanced experience with Java concurrency, streams, and performance tuning Cloud & Infrastructure AWS services including EC2, ECS/EKS, S3, RDS and/… working in Agile/Scrum environments and influencing engineering best practices Experience Level Principal‐level backend engineering experience building and operating large‐scale, high‐performance systems Approximately 8+ years of backend development experience, with several years working on production Java and Spring Boot services Proven experience owning architecture ...

+ Java) to help architect and build a new FX e-trading platform from the ground up, working across the stack to deliver high-performance, resilient, and secure systems. You will partner closely with product, trading, and infrastructure teams to deliver features end-to-endfrom UI and desktop container … drive state management, data visualization, and UX for trading workflows. Optimize latency, throughput, and reliability across the stack; instrument observability (metrics, tracing, logging) and performance profiling. Establish engineering best practices: code standards, testing strategies (unit/integration/E2E), CI/CD, secure coding, and release management. Mentor engineers ...

React , TypeScript , and Next.js . You’ll work across the full front‐end life cycle — from architecture and design collaboration, through to deployment and optimisation — delivering robust, performant, and accessible user interfaces. You’ll join a highly collaborative team where your voice will matter, and your work will … Build and maintain modern web applications using React , TypeScript , and Next.js . Translate UI/UX designs into responsive, accessible and high‐performance user interfaces. Collaborate strategically with backend engineers, product owners and designers to deliver end‐to‐end solutions. Write clean, tested, maintainable code and set best‐practice ...

certifications, including AWS, Azure, and GCP, along with extensive in-house courses and a mentoring program. Key Responsibilities Design and implement scalable, high-performance architectures for diverse client projects, ensuring alignment with business objectives and technical requirements. Collaborate with clients to gather and analyse requirements, translating them into robust … accessible. Provide technical leadership and mentorship to development teams, guiding them through best practices in software engineering and architecture. Conduct regular code reviews and performance optimisations to ensure high-quality, efficient solutions. Stay up-to-date with emerging technologies and industry trends, evaluating their potential impact on client projects ...

5+ Years About the Role We are looking for an experienced Back-End Developer with strong expertise in Go (Golang) to build scalable, high-performance backend systems. You will design APIs, manage real-time data pipelines, and support analytics-driven applications deployed on AWS cloud infrastructure. This role … ideal for someone passionate about data-driven systems, cloud-native architecture, and performance optimization. Key Responsibilities Backend Development Develop and maintain scalable backend services using Go (Golang). Design and implement RESTful APIs and GraphQL endpoints. Build APIs for data ingestion and service-to-service communication. Write clean, maintainable ...

enhancing the firm’s automated trading systems and execution platforms. Working closely with traders and quantitative researchers, you will contribute directly to the performance and robustness of live trading strategies. Key responsibilities include: Designing and developing high-performance trading systems, primarily in C# Collaborating with trading and research … maintaining back-testing frameworks that accurately replicate production environments Implementing comprehensive testing (unit, integration, and end-to-end) to ensure reliability, scalability, and performance Monitoring production systems, analysing KPIs, and proactively improving system stability and efficiency Supporting live trading operations and working alongside execution and infrastructure teams Contributing ...

operational excellence. Build Observability Infrastructure Architect tracing, logging, and monitoring systems for agent behavior at scale. Develop dashboards, metrics, and alerting pipelines. Enable continuous performance evaluation and optimization. Mentor and Grow the Team Lead architectural decision-making within the squad. Conduct code reviews and establish engineering best practices. Mentor … strategy. Identify technical risks and drive reliability and velocity improvements. Influence technical direction beyond the immediate team. Core Skills Expert-level Python (async programming, performance optimization, SDK/library design). Deep understanding of agentic frameworks (LangChain, LangGraph, LlamaIndex, AutoGen or similar), including internal mechanics. Proven experience shipping production ...

Warehouse patterns, Gold Layer modelling, defining/implementing ingestion + transformation pipelines (Dataflows Gen2, Notebooks), establishing modelling standards for Gold Layer + semantic models, performance optimization, lineage/observability, governance, RBAC, security, data retention. Team Leading/Delivery: setting standards, directing/mentoring the team, reviewing designs, unblocking delivery. … orchestration, testing, test data preparation, reporting validation, release practices. Operational Readiness: ensuring documentation/run books + non-functional requirements are met (security, resilience, performance). Short-Term Objective: baseline Gold Layer model components to enable consistent semantic models and reporting. Active SC Clearance is essential for this project. ...