1 to 25 of 30 Performance Optimisation Jobs in the City of London

Studio o Contact Builder/Data Extensions o Triggered sends • Ensure platform best practices and governance are followed • Troubleshoot campaign and automation issues quickly Performance & Optimisation • Monitor campaign performance and recommend optimisations • Run A/B tests and structured experimentation • Improve engagement, conversion, and retention metrics • Translate … performance data into actionable CRM improvements Collaboration & Stakeholder Support • Work with strategy, marketing, product, analytics, and compliance teams • Support briefing → build → QA → launch workflows • Provide clear delivery timelines and status updates • Coordinate with creative and content teams on assets and templates Quality & Compliance • Ensure CRM activity meets regulatory ...

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 ...

modern data stores such as PostgreSQL or MongoDB • Experience leading distributed or hybrid engineering teams • Advanced capability in system architecture, scalability planning and performance optimisation Why You’ll Love It – The Engineering Lead will benefit from: • £110,000–£130,000 base salary plus share options • Full ownership ...

used by Sales and Trading Partner closely with FX Traders, Sales, and Quant/Tech teams to define requirements and deliver solutions Deliver high-performance, responsive UIs suitable for latency-sensitive trading environments Collaborate with global development teams across London and Asia Contribute proactively to product evolution and platform … within financial markets FX trading systems experience highly advantageous Experience with testing frameworks (Jest, Cypress, etc.) and CI/CD pipelines Strong focus on performance optimisation and UI responsiveness Confident working directly with front-office stakeholders Bachelor's degree in Computer Science, Engineering, or related discipline Desirable Backend ...

complex features, and manage technical debt within an Agile framework. Full Stack Development: Remain hands-on with development, implementing complex features and solving critical performance bottlenecks across the C# and Next.js stack. GCP Platform Strategy: Own the deployment, monitoring, and scaling strategy on Google Cloud Platform, ensuring the platform … environments. Hands-on experience with external integrations , specifically involving financial, risk management, or payment gateway APIs. Expert-level proficiency in Next.js/React , including performance optimisation and server-side rendering architecture. Extensive experience with Google Cloud Platform (GCP) , including cloud-native architecture, cost optimisation, and security best ...

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 ...

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 ...

side language). Experience with relational databases. Working knowledge of cloud platforms, preferably Google Cloud Platform. Strong commitment to code quality, efficient architecture, and performance optimisation. Bonus Points Advanced knowledge of JVM-based languages, particularly Kotlin. Experience with Kubernetes and Terraform. Familiarity with advanced Postgres features such as GIST ...

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 ...

What You'll Be Doing Designing and evolving the core backend architecture of a complex, high-throughput platform Solving hard scaling problems across concurrency, performance, and reliability Building systems that process large volumes of unstructured data with strict latency requirements Setting technical direction and raising engineering standards across … have already "been there" technically. Core experience: Extensive backend engineering experience (typically 10+ years) Expert-level Python, with deep understanding of async patterns and performance optimisation Proven experience designing and scaling distributed systems Strong background in API design, data-intensive systems, and service architecture Track record of building ...

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 ...

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 ...

environments. Leverage VMware tools (e.g., vSphere, vCenter, NSX) to optimize OpenShift deployments. Configure and manage Pure Storage solutions (e.g., FlashArray, FlashBlade) to provide high-performance, scalable storage for OpenShift workloads. Ensure compatibility and performance optimization between OpenShift, VMware, and Pure Storage. CI/CD Pipelines and DevOps Workflows ...

+ 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 ...

DeFi Developer — High-Performance Crypto Trading Systems (London) Our client is hiring a sharp, ambitious DeFi Developer to join their DeFi trading team building high-performance systems that operate directly on decentralized markets . You’ll work hands-on across the full trading stack — from on-chain integrations … execution logic , to infrastructure, monitoring, and performance optimization . What you’ll do Build and ship production-grade code (primarily Rust + Python ) Develop systems that interact with on-chain protocols and infrastructure (Solidity, JSON-RPC, Solana, MEV workflows, etc.) Improve real-time monitoring, execution pipelines, and strategy tooling ...

looking for an experienced Senior Angular Frontend Developer,London on a contract basis to build high-performance, scalable web applications and optimize existing frontend systems. The role involves reviewing current codebases, improving performance, and developing modern UI solutions using the latest Angular technologies (versions 19 & 20). 8+ … years of experience in frontend development with strong hands-on expertise in Angular (versions 19/20) . Develop and maintain high-performance, scalable frontend applications capable of handling high-volume traffic. Review existing codebases and implement application performance optimization improvements. Strong hands-on experience with RxJS, Angular ...

. Designing and maintaining efficient data pipelines and vector storage solutions using MongoDB Atlas Vector Search. Fine-tuning LLMs on custom datasets to enhance performance for specialized tasks related to our documentation and user support. Collaborating with our YOLO development team to explore and build innovative multi-modal solutions. … full RAG pipeline, including vector embeddings , rerankers , and data indexing in databases like MongoDB. Practical knowledge of LLM fine-tuning, prompt engineering, and performance optimization. Familiarity with MLOps principles and tools, including CI/CD with GitHub Actions . A strong interest in computer vision and an understanding ...