26 to 50 of 50 API Design Jobs in London

What were looking for: Hands-on experience running real production workloads on AWS not just deploying to it Strong Postgres/SQL skills: schema design, query tuning, migrations Solid API design chops: clear contracts, versioning, backwards compatibility Python-first mindset (FastAPI or similar) Redis experience: caching patterns ...

Experience with AWS or Azure Familiarity with Docker and Kubernetes Experience working in secure or highly regulated environments Strong understanding of software architecture and API design IT WOULD BE NICE FOR THE AI SOFTWARE ENGINEER TO HAVE. Experience with RAG pipelines and vector databases Knowledge of MLOps tooling ...

Experience with AWS or Azure Familiarity with Docker and Kubernetes Experience working in secure or highly regulated environments Strong understanding of software architecture and API design IT WOULD BE NICE FOR THE AI SOFTWARE ENGINEER TO HAVE.... • Experience with RAG pipelines and vector databases • Knowledge of MLOps tooling ...

high-signal workflows at scale. This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment.Job ResponsibilitiesLead the design and delivery of user interface capabilities across Execute, from discovery to production supportSet front-end technical direction, including architecture, standards, performance, and testing strategyPartner … delivering real-time or data-intensive user experiencesDemonstrated technical leadership in setting standards, leading designs, and mentoring teamsSolid software engineering fundamentals, including OO/design patterns, debugging, and documentationFamiliarity with agentic development approaches across the software development lifecycleStrong communication skills and ability to work effectively in global, cross-functional ...

Develop and maintain high-quality software applications using .NET (4.5+/.NET Core) and Python. Collaborate with cross-functional teams to gather requirements and design effective solutions. Provide support to team members and stakeholders to ensure smooth project execution. Liaise with technical and business colleagues to understand functional requirements … deliver solutions that align with business objectives. Utilise your understanding of Web Services (REST, SOAP) to design and document APIs effectively. Work with MS SQL Server, including TSQL, SSIS, SSRS for database management and reporting. Utilise version control tools such as Git/Bitbucket and job scheduling tools like ...

working on the underlying systems that make complex visualisations fast, accurate, and scalable. The challenges range from rendering performance and interaction design through to algorithms, graphics, API design, and numerical correctness. What you’ll be doing Designing and building core charting features used by developers around … exceptionally high technical standards High levels of ownership and autonomy Small team, significant impact Opportunity to deepen expertise in performance, graphics, visualisation, and systems design Package Salary up to £200,000 Hybrid working (London) Private healthcare Pension Additional benefits If you’re interested in building the technology behind modern ...

with delivery teams to guide implementation and resolve technical challenges. * Conduct architecture reviews for projects and change requests, validating alignment with EA standards. * Design end-to-end integration solutions across the firm's application estate (Aderant, iManage, Intapp, HubSpot). * Define API contracts, message schemas, and integration patterns … build vs buy decisions. * Conduct proof of concepts (POCs) and technical spikes to validate architectural approaches. Required Experience: * Experience in solution architecture, technical design, or senior development roles. * Strong experience designing integration solutions across enterprise applications. * Excellent knowledge of API design, messaging patterns, and integration architectures. * Experience ...

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 ...

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 ...

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 ...

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 ...

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 ...

technology organisation delivering mission-critical systems that support national security and help protect the UK. Working as part of empowered DevOps teams, you'll design, develop, deploy and maintain cloud-based applications and services, collaborating with engineers and end users to solve complex technical challenges. The Role … opportunity to work with cutting-edge cloud technologies, contribute to innovative solutions and continue developing your skills within a supportive engineering community. Key Responsibilities •Design, develop and maintain secure cloud solutions using AWS. •Build and support applications and services across AWS environments. •Work within agile DevOps teams to deliver ...

distribution by working across third party platform distributors and directly with client distribution platforms. 2. Product Discovery & Requirements Definition Lead structured product discovery and design sessions with clients, business, technology, operations. Translate business and client needs into clear product requirements, technical specifications, and prioritised backlog items. Own product documentation … distribution architectures, including APIs, event/batch delivery, entitlement models, and access controls. Demonstrated ability to work effectively with senior engineers and architects on design and tradeoff decisions. Experience defining API/FTP/Web distribution requirements. Preferred:Knowledge of the index business preferred. Experience with agentic solution ...

Role:We are seeking an experienced Full-Stack Engineer (5-7 years) to join a leading global financial institution in London. You will design, build, and maintain high-performance, cloud-native applications supporting critical financial operations.Key Responsibilities:Design and deliver end-to-end applications using Java (Spring Boot … stack software development experience.Core proficiency in Java, Spring Boot, and ReactJS.Hands-on experience with AWS, Kubernetes, and Kafka.Strong grasp of multithreading, microservices architecture, and API design.Financial services, Investment Banking, or Risk domain experience is highly advantageous.Ability to work from the London office 3 days per week.How to Apply:Submit ...

Role: We are seeking an experienced Full-Stack Engineer (5-7 years) to join a leading global financial institution in London. You will design, build, and maintain high-performance, cloud-native applications supporting critical financial operations. Key Responsibilities: Design and deliver end-to-end applications using Java (Spring … proficiency in Java, Spring Boot, and ReactJS . Hands-on experience with AWS, Kubernetes, and Kafka . Strong grasp of multithreading, microservices architecture, and API design. Financial services, Investment Banking, or Risk domain experience is highly advantageous. Ability to work from the London office 3 days per week . ...

regions with a wide range of strategies.As a Senior Software Engineer, you will work closely with a talented team of engineers to collaboratively design and develop robust software solutions essential for facilitating global trading operations. This includes systems such as trading systems, exchange connectivity solutions, monitoring systems, and integration … professional experience in C++ , Rust, Java and PythonDemonstrated expertise in network communication, including multicast and WebSockets.Proficiency in inter-process messaging, micro-service architectures, and API design.Familiarity with Functional Programming and Immutable Design.Experience with trading systems is desirableExcellent oral and written communication skills.Bachelor’s degree in Computer Science or equivalent.Join ...

drive architectural decisions will be essential. Responsibilities Define and maintain the end-to-end solution architecture across the rewards portal and wider Salesforce ecosystem. Design integration patterns across Salesforce, customer identity, APIs, mobile applications and enterprise platforms. Translate business and technical requirements into scalable, resilient and maintainable solution designs. … Define the architecture for SSO, customer identity integration and associated authentication journeys. Review and assure API designs, data flows, integration components and system dependencies. Support the design of mobile and in-app webview customer experiences. Produce architecture artefacts, solution options, design decisions and technical roadmaps. Coordinate suppliers ...

users manage their card programsPartner with engineering to bring new Stripe Issuing product solutions to the UK and European marketsCollaborate with other Stripe teams (design, legal, risk, compliance, engineering, etc.) early in the product development lifecycle and jointly shape product plans that lead with delightful and helpful user experiencesOwn … roadmap and go-to-market, with product marketing, of EMEA Stripe IssuingAct as the voice of the user in product and API designs, gathering direct feedback from customersEnsure we’re building in a scalable, performant wayWho you areWe're looking for someone who:Brings 8+ years of experience ...

experiences, setting architectural direction, influencing engineering standards, and shaping the 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 … excellence, code quality, and knowledge sharing.Safely integrate and operate AI/ML-enabled solutions that improve mobile user experiences and business outcomes.Collaborate with product, design, and engineering stakeholders to deliver innovative mobile features and drive technical strategy across the organization.Minimum Qualifications:Bachelor’s degree in Computer Science ...