101 to 125 of 145 API Design Jobs in London

building the most consequential AI solutions in Funds Transfer Pricing and Financial Hedging platforms, and we are looking for a Senior AI Engineer to design & develop Agentic AI solutions for these domains.The ideal candidate is visionary engineer, passionate about architecting and building sophisticated AI agents from concept to production.In … includes hands-on experience with planning/reasoning, memory systems, MCP and Vector DBsPractical knowledge of LLMs and their application within agentic architectures, including API design and integration for AI services.Demonstrated mastery of Prompt and Context Engineering, including the ability to structure and compress information for optimal model ...

team that executes complex, multi-leg synthetic strategies on behalf of institutional clients.Role OverviewICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands-on delivery of desktop platform automating and streamlining trading desk workflows. This is a high-visibility player-coach role: you will apply … C#/.NET (LTS): back-end services with ASP.NET Core.Experience designing and delivering event-driven, service-oriented back-end systems (message brokers, async workflows, API design) in a production trading environment.Experience building desktop applications that host web content (e.g., Electron, Tauri, or custom .NET host); comfortable with WebSocket ...

related technologiesCapable to use version control software such as GITKnowledge of SOLID principlesKnowledge of clean code practicesExperience using web service protocols such as Rest, API design for extensibility and integrationExperience debugging complex applicationsExperience with Agile development project management methodologiesDatabase Development in SQL Server or NoSQL DatabasesSome familiarity ...

critical changes, setting the standard for quality, performance, and maintainability.Provide hands‐on expertise in Java‐based systems, including concurrency, performance tuning, memory management, and API design.Non‐Functional Ownership & System PerformanceTake a leading role in defining, implementing, and validating non‐functional requirements, including system latency, throughput, scalability, and reliability.Drive solutions ...

models and integration patterns Reviewing significant technical initiatives and providing architectural guidance across multiple engineering teams Embedding security, resilience, scalability and observability into platform design from the outset Identifying architectural risk, technical debt and platform constraints Partnering with Engineering and Product leadership on strategic technical decisions Influencing engineering teams … experience defining architecture across SaaS, product-led or platform-based environments Experience working across complex, multi-system or distributed technology landscapes Strong understanding of API design, integration architecture and service-oriented systems Cloud architecture experience, ideally within Azure A strong appreciation for security-by-design, resilience, scalability ...

role in shaping the future technology landscape supporting advisers and clients across the organisation. The Role As Engineering Lead, you'll own the design, development, integration and operation of the firm's financial planning platform, ensuring it remains scalable, secure and fit for future growth. You'll provide technical … Experience Strong experience with iRESS Xplan , including configuration, customisation and integration. Proven leadership experience within software engineering or platform engineering environments. Strong understanding of API design and enterprise integration patterns. Experience delivering solutions within regulated financial services environments. Knowledge of cloud and middleware technologies, including serverless architectures. Experience ...

high-volume, high-leverage platform role: the systems you build are used by many teams across the company, so correctness, reliability, and thoughtful API design matter enormously.QualificationsWhat do you need?:5+ years of experience in Java, Kotlin, Python or Go Strong experience with Spring framework, relational databases, distributed ...

sound, you are a generalist at heart. You will do whatever it takes to get a product into the hands of global users—from API design to frontend polish.Minimum Qualifications6+ years of software engineering experience, with a deep foundation in backend architecture and a proven ability to confidently ...

Graph ArchitectExperience: 10+ years (5+ years in Knowledge Graphs/Ontology Engineering)Role OverviewWe are looking for a Knowledge Graph Architect to lead the design and governance of enterprise knowledge graphs. This role will define the ontology, data model, and canonical vs. interpretive boundaries, enabling scalable, high-quality graph … prioritization, and skill developmentStakeholder CollaborationPartner with data, AI/ML, and business teamsTranslate requirements into semantic modelsProvide thought leadership on graph adoptionRequired SkillsNeo4j Schema Design (Cypher, property graph modeling)Ontology Engineering (OWL/RDF, Protégé)Graph RAG (LLM integration, retrieval strategies)API Design (REST/GraphQL)Preferred ...

between Coupa and SAP S/4HANA. This is an opportunity to work on a high-profile global programme, owning integration architecture from initial design through to deployment, cutover and Hypercare. What you'll be doing: Designing and delivering Coupa SAP S/4HANA integrations across complex enterprise landscapes … Leading integration architecture, solution design and technical delivery Building and managing APIs including REST/JSON, OData, IDocs and BAPIs Supporting procurement process integrations covering: Supplier and Business Partner data Purchase Orders Goods Receipts Service Entry Sheets Invoices and payment status updates Master data synchronisation Working with integration platforms ...

boundaries, ownership models and integration patternsReviewing significant technical initiatives and providing architectural guidance across multiple engineering teamsEmbedding security, resilience, scalability and observability into platform design from the outsetIdentifying architectural risk, technical debt and platform constraintsPartnering with Engineering and Product leadership on strategic technical decisionsInfluencing engineering teams through technical credibility … looking forProven experience defining architecture across SaaS, product-led or platform-based environmentsExperience working across complex, multi-system or distributed technology landscapesStrong understanding of API design, integration architecture and service-oriented systemsCloud architecture experience, ideally within AzureA strong appreciation for security-by-design, resilience, scalability and operational ...

business, regulatory, and technical domains—areas where no single existing team has full coverage, like tax systems, compliance-driven flows, or monetization tools.Solutions Architecture: Design integrations for enterprise prospects by translating their business requirements into technical solutions. Your architectural decisions directly influence deal outcomes—from enabling multi-million dollar … technical stakeholdersMake pragmatic decisions on when to optimize for performance vs. velocity based on business impactThrive in cross-functional environments spanning Product, Design, Compliance, and SalesDesign for scale, maintainability, and production excellenceHave led multi-team initiatives with measurable technical or business impactPreferred qualifications: Fintech, payments, or regulated industry experienceHigh ...

greenfield work though.The Senior ASP.NET MVC Developer must have:3-5 years C#, ASP.NETMVC 4 +SQL ServerStrong background in Computer ScienceNHibernate or equivalent ORMREST api design experiencesome automation experience (continuous delivery/powershell/python)I am looking for a Senior ASP.NET Developer that has proven development experience … development packages in the market, all inclusive.My client is based near Kingston in LondonASP.NET MVC, razor, c#, sql, mvc, .net, javascript, greenfield, , data, analytics, api, jquery, rest, powershell, python, continuous, delivery, integration ...

/3Strong C#NET WebAPIDocument oriented databases (MongoDB, DocumentDB or others)GraphQL experience (Frontend/backend)Strong React/TypeScriptSingle Page ApplicationBDD/TDDESTful API design and developmentKnowledge and experience with Git and GithubCloud experience will be gained as they are currently running a massive migration and development project … development packages in the market, all inclusive.My client is based in Bath.net core, ASP.NET MVC, razor, c#, sql, mvc, .net, javascript, greenfield, , data, analytics, api, jquery ...

confidence to own problems end to end.You will bring strong JavaScript/TypeScript experience across frontend and backend development, alongside a clear understanding of API design and relational databases. You have mentored engineers and may already have line management experience, conducting development and performance conversations with maturity ...

like MVC, MVVM, or VIPER. (We use VIPER and MVVM but are open to exploring new approaches)Desire to write testable codeUnderstanding of REST API designStrong product mindset and passion for user experience, with a focus on prioritising work that addresses user needs and making data-driven decisions.Excellent communication ...

business priorities.Ensure teams are appropriately staffed to meet evolving product and platform demands.Enable Engineering ExcellencePartner with technical leaders responsible for backend frameworks, microservice foundations, API standards, testing practices, and developer tooling.Support the adoption and consistent implementation of engineering standards across backend teams.Help drive continuous improvement initiatives that enhance quality … technical credibility across modern backend engineering practices, including:Java and Spring Boot applications at enterprise scale.Python and FastAPI-based services.Microservice architectures and distributed systems.API design, versioning, and integration patterns.Event-driven architectures using Kafka or similar technologies.Kubernetes-based deployments and cloud-native delivery models.CI/CD practices, GitHub Actions, GitOps ...

Platform LeadExperience: 10+ years (5+ years in AI/LLM platforms, RAG, or agentic systems)Role OverviewWe are seeking an Agentic Platform Lead to design and deliver the consumption layer for AI agents, defining how agents query, interpret, and interact with knowledge graphs and enterprise data.This role will focus … agent workflowsTeam LeadershipLead a team of AI and platform engineersDemonstrate strong capability in coaching, mentoring, and leading internal teamsProvide hands-on technical guidance and design reviewsBuild a high-performing, collaborative team cultureDrive delivery, prioritization, and skill developmentStakeholder CollaborationPartner with AI/ML, data, and business teamsTranslate requirements into agent ...

trading spaceExtensive programming experience.Technology/programming skills in Rust, C++, Java, KDB, Python, SQLExtensive experience in messaging and data serialization technologies, market data processing, API design, latency optimization, code testing, build and deployment toolsExperience in taking ownership of existing technologies, building new ones, and performing technology migrations.Working knowledge ...

concept and production-grade AI solutions. Architect, develop and deploy AI-native applications leveraging Large Language Models (LLMs), agentic systems and multimodal AI technologies. Design, build and orchestrate intelligent agent workflows using the Gemini Enterprise Agent Platform, Agent Development Kit (ADK) and Agent2Agent (A2A) protocol. Develop and implement Retrieval … using modern front-end technologies such as React, Next.js and Svelte. Build robust backend services, APIs and orchestration frameworks to support AI-powered applications. Design and manage data architectures across SQL, NoSQL and vector database environments. Collaborate with business stakeholders to identify, prioritise and deliver AI use cases that ...

performance, reliability, and user trust are critical. Build and maintain iOS applications using Swift and SwiftUI. Integrate AI-powered features through backend APIs. Design UX patterns for AI interactions, including loading states, streaming responses, retries, and fallbacks. Optimize performance, memory usage, and battery efficiency. Capture user signals and feedback … support AI evaluation and iteration. Collaborate closely with backend and ML engineers on API design and system behavior. Maintain high App Store quality, stability, and production reliability. Requirements: 3+ years of iOS development experience using Swift. Hands-on experience integrating AI-powered features into mobile apps. Strong understanding ...

Basel III/IV, CCAR, counterparty limit monitoring, or live exposure calculations. Core Tech Stack: Expert-level C#/.NET (.NET Core), scalable API design, and solid OOP/architectural principles. Data & High Performance: Strong SQL skills, experience handling large data volumes, and working with event-driven/ ...

frame, challenge upward, and drive decisions across teams AI fluency. Active use of AI for spec writing, prototyping, and analys Familiarity with API design, microservices, and SaaS platforms ...

something you are passionate about.The Java Scala developer will be involved in:Web application greenfield developmentWeb analytics & business intelligenceMachine learning, risk modelling, fraud detection.API design and provisionIntegration patterns & messagingHybrid cloud infrastructureJavaScript application developmentWeb application performanceScalabilityExceptional knowledge of low-high level systems coupled with true programming ability.Java Scala Developers MUST ...

passionate about.The Junior Java Scala developer will be involved in:Web application greenfield developmentWeb analytics & business intelligenceMachine learning, risk modelling, fraud detection.API design and provisionIntegration patterns & messagingHybrid cloud infrastructureJavaScript application developmentWeb application performanceScalabilityExceptional knowledge of low-high level systems coupled with true programming ability.Junior Java Scala Developers MUST have ...