1 to 25 of 45 Performance Optimisation Jobs in the City of London

that power enterprise-grade SaaS and analytics solutions, primarily within the insurance domain. Working in an agile, cloud-first environment, you will develop high-performance microservices, optimise database performance, implement robust security protocols, and contribute to architectural decisions that support scalable, resilient systems. This role offers the opportunity … third-party integrations Develop microservices aligned to modern architecture patterns Implement business logic, validation layers and data processing components Ensure optimal database performance across relational and non-relational systems Implement modern authentication and authorisation frameworks including OAuth2, SAML and JWT Develop secure, testable and reusable code aligned to best ...

chance to build something category-defining, this could be your role. About the company This business is a truth-first ad measurement and performance optimisation platform built for performance marketers who need attribution they can trust and act on. The platform connects ad platform APIs with first … They are already working with impressive early-stage logos across financial services (including global trading platforms and crypto exchanges), ecommerce, and telco. Measurement and performance optimisation is an evergreen, global problem now being reshaped by AI and the founders are building toward market leadership. About the role ...

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 ...

mobile, and frontend teams. What You’ll Work On Designing and improving backend services that power web + mobile applications Building and maintaining high‐performance APIs and distributed microservices Solving problems around scalability, reliability, security, and automation Working with modern API protocols including GraphQL and gRPC Enhancing the platform … Building APIs for high‐scale consumer or B2B products Working with message queues like Kafka, RabbitMQ, NSQ, or Pulsar Integrating external APIs/services Performance optimisation & working under performance budgets Interest or experience in cryptocurrencies, Web3, or digital assets Open‐source contributions or tech blogs/talks ...

research datasets Collaborate with scientists, bioinformaticians, and data teams to translate research needs into software solutions Contribute to cloud infrastructure, system architecture, and performance optimisation Ensure high-quality code, testing, and CI/CD best practices Mentor junior engineers and support technical decision-making Required Skills & Experience Strong ...

developing data models and ETL processes; to driving value through dashboards or business applications. Integrating AI tools and LLMs to unlock valuable insights, optimise performance, and automate business processes will also be a part of this role. We’re looking for a high achiever that will be seen … transformation, and visualisation Develop and optimise data models, ETL processes, Workflows and dashboards within the platform Provide best practices for analytics pipelines, integration strategies, performance optimisation and data governance and AI readiness Leverage AI capabilities within the platform and integrate external AI tools and LLMs to enhance data ...

trading. Following the recent acquisition of a major energy trading and technology business, the firm has significantly expanded its capabilities in renewable power optimisation, analytics, and physical gas trading across international markets. They are now hiring a Senior Data Engineer to join their Technology Data, AI & UX team … working directly with front-office stakeholders and translating trading requirements into robust data solutions. What You’ll Be Doing Building and maintaining high-performance data pipelines ingesting structured and unstructured datasets from a variety of internal and external sources. Developing ingestion processes including scrapers, ETL pipelines, crawlers, streaming jobs ...

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 ...

documentation, lineage, and observability Lead code reviews and mentor data & analytics engineers Drive CI/CD and infrastructure-as-code adoption Own platform reliability, performance optimisation, and cost efficiency Establish SLAs for data freshness and quality 🤝 Cross-Functional Impact Partner with Data Science, Product, and Engineering leadership Translate … reliable data platform powering AI and analytics growth Reduced ML time-to-production High levels of data quality, observability, and governance maturity Improved cost-performance efficiency across the data stack A strong, growing data engineering capability within the team This is a high-impact leadership role within a forward ...

leader within the Surveillance Technology team. Provide expert oversight across analysis, architecture, design and delivery of complex systems. Architect, build, and evolve scalable, high-performance solutions for Communications Surveillance and Record Keeping. Lead engineering standards: architecture reviews, vendor assessments, impact analysis, and automated testing. Mentor and develop engineering talent … Record Keeping. Translate complex technical concepts for both technical and non-technical stakeholders. Support agile planning, estimation and prioritisation. Identify opportunities for system optimisation, refactoring, and alignment to target architectures. Manage technical risks, issues and dependencies. Benchmark against peer organisations to ensure alignment with regulatory and industry expectations. Experience ...

Markets is seeking a Senior Low Latency Java Developer to join our Quantitative Strategies team within Pricing & Risk, working on our high-performance, high-frequency trading platform. This is a hands-on role at the core of our market-making technology stack, where nanoseconds matter and engineering excellence … critical. Youll design and build ultra-low latency pricing and risk systems that directly power our global trading operations. If you thrive in performance-critical environments and want your work to have real market impact, wed love to hear from you. The Role Ultra-Low Latency Engineering Develop ...

join their Flight Management System (FMS) engineering team. This team builds mission‐critical software used by airlines worldwide - powering real‐time flight operations, route optimisation, and next‐generation cockpit intelligence. In this role, you’ll work primarily on high‐performance C++ systems (80%), with additional exposure to Angular … frontend development (20%), contributing to one of the most advanced FMS platforms in the industry. Your work will directly impact global aviation efficiency, fuel optimisation, and operational decision‐making. Responsibilities Design and develop C++ applications for core Flight Management System components Build high‐performance, multi‐threaded backend services ...

models across Snowflake, Databricks, and cloud environments (AWS/GCP). Working closely with Data Science, Product, and Analytics teams, youll ensure reliable, high-performance data flows that power AI and analytics products. Alongside deep technical delivery, youll be responsible for leading the junior engineers and near shore partners … architectural direction and best practices. Key Responsibilities Design and maintain scalable data architectures across Snowflake and Databricks Lead schema design, dimensional modelling, and SQL performance optimisation Build robust ETL/ELT pipelines Develop resilient API ingestion workflows Implement data quality frameworks and enforce data contracts Build CI/ ...

services supporting a multi-tenant SaaS platform Work with asynchronous and event-driven processing (e.g. messaging, background services) Troubleshoot, refactor, and optimise code for performance, security and maintainability Participate in design reviews and contribute to technical architecture discussions Develop new features and maintain functionality on an existing enterprise software … RESTful services Proven experience working on SaaS platforms Strong experience using Microsoft Azure in production environments Good understanding of backend architecture, performance optimisation and security Experience working with system integrations and external APIs Nice to Have Familiarity with Microsoft Dynamics CRM or similar systems Exposure to Azure services ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Fabric etc) 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 ...

application and SDK • Collaborate closely with product and design from idea through to release • Own features end-to-end, including architecture decisions • Contribute to performance optimisation and developer experience • Work in a high-agency, experimental environment where engineering quality matters This is not a delivery-only environment. Engineers … product and technical direction. They’re looking for software engineers who: • Have strong hands-on React and TypeScript experience • Care deeply about frontend craft, performance and detail • Are comfortable working in ambiguity and high-ownership environments • Have shipped meaningful features in startup or product-led teams • Can contribute ...