26 to 50 of 111 API Design Jobs in London

Data & API Integration Engineer/Architect Location: London customer site – 1/2 days p/week on site Salary: Up to £105k DoE plus bonus Clearance: Active SC preferred - can sponsor if not currently held (British passport required) To apply, email: henry.clay-davies@searchability.com We’re working with … leading technology consultancy delivering secure, large-scale digital platforms across public sector and enterprise programmes. They’re looking for an experienced AWS API & Integration Engineer to help design and deliver modern, scalable API-led architectures. This is a hands-on engineering role focused on building secure, cloud ...

senior individual contributor who combines hands-on Java development with architectural leadership, remaining close to implementation and setting the technical standard through design, code-level guidance, and practical problem solving. Design, build, and evolve highly available, high-throughput, zero-downtime systems and internet-facing APIs that can scale … securely for large retail and external client volumes. Lead architectural decisions across API design, domain modelling, integration patterns, resilience, observability, and operational robustness, ensuring the platform is fit for 24/7 global production use. Work across multiple software engineering teams to drive consistency in engineering standards, development ...

from initial discovery through to deployment and operational handover. Ensure the solution remains aligned with enterprise standards, security principles, and long-term scalability requirements. API Architecture & APIM Contract Leadership Own the API Management (APIM) contract, including: API design and versioning Security models (OAuth, managed identities, policies … Integration patterns and service boundaries Governance of API lifecycle and documentation Azure AI Solution Design Architect and guide the implementation of Azure AI capabilities, including: Azure AI Search - semantic search, vector search, indexing strategies Document Intelligence - OCR, form extraction, document processing pipelines Content Understanding - classification, summarisation, enrichment models ...

improved valuation,, internal market and others) are architecturally coherent, reusable and aligned with bp's enterprise technology strategy. Establish and chair the GPTI Architecture Design Authority, governing all significant change through structured reviews, design challenges and sign-off gates. Influence and advise VP/SVP-level stakeholders … through risk analytics (VaR, Greeks, Monte Carlo, stress testing), P&L attribution, settlement, invoicing, confirmations and regulatory reporting (REMIT, EMIR, MiFID II, ACER). Design and govern the market connectivity architecture, covering exchange connectivity, broker interfaces, electronic trading platforms, TSO/DSO nomination interfaces and real-time price feeds. ...

Full Stack positions—for upcoming roles across backend, frontend, full-stack, platform and product engineering. These are hands-on roles where you'll design, build and ship production software that real users depend on. You'll work across the full engineering lifecycle—from technical design and implementation through … software fundamentals with genuine curiosity about the product they're building and the users they're building it for. Key Responsibilities Partner with product, design and stakeholders to scope features and translate them into technical work Design, build and ship production-grade services, APIs, web applications and supporting ...

2+ years leading engineering teams or owning technical delivery Engagement Model: Full-time, Product Engineering Job Responsibilities Own the high-level and low-level design of services on the BPA platform — define service boundaries, integration contracts, data models, and non-functional requirements. Lead architecture and design reviews … enforce engineering standards for code quality, security, performance, and testability across the team. Design and implement RESTful APIs and microservices using Java 17+ and Spring Boot 3.x — this is a hands-on role; expect to spend meaningful time in the codebase on the hardest problems. Drive resilience and scalability ...

knowledge of enterprise integration concepts and approaches, (e.g, REST, SOAP, RPC), and integration patterns (Sync/Async, Batch, Pub-Sub) Knowledge of microservices architecture, API-led architecture and API design best practices RDBMS systems such as SQL Server, MySQL A good understanding of design principles … Experience with DevOps and CI/CD pipeline environments, e.g. Maven Experienced writing unit tests using appropriate tools e.g. MUnit Experience with the entire API development lifecycle from design & build to governance & management Experience in working in an Agile environment Benefits On top of a competitive salary ...

major advantage. Key Responsibilities Technical Leadership Own the technical roadmap, guide architectural decisions, and ensure engineering excellence across backend services. Python Engineering Design and build robust, secure, and scalable microservices using Python (FastAPI, Django, Flask). System Architecture Lead the design of distributed systems, event-driven architectures … data intelligence. DevOps & Cloud Collaborate on CI/CD pipelines, containerisation (Docker, Kubernetes), and cloud deployments (AWS/GCP/Azure). Data & API Strategy Oversee API design, data modelling, and integration with internal and external financial systems. Security & Compliance Ensure systems meet regulatory, security, and audit ...

venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with … Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast ...

first‐class concerns. Inputting into architecture and technical direction in collaboration with Principal Engineers – making considered, well‐reasoned decisions on service boundaries, data design, messaging patterns, consistency guarantees and performance. Championing a high‐quality engineering culture – test coverage, peer review, CI/CD discipline via GitHub Actions, Infrastructure … proven senior-to-staff-level backend engineer with deep, current expertise in C# and .NET Core 8/9 – you can architect and lead design of distributed REST API microservices at scale. Authority in AWS serverless architecture – Lambda‐first, with strong working knowledge of API Gateway ...

PostgreSQL, complex data modelling AI/ML : OpenAI integration, semantic search, conversational agents, unstructured data analysis and extraction Infrastructure : AWS (Lambda, ECS/EKS, API Gateway, S3) DevOps : Terraform, GitHub Actions, Helm, Infrastructure-as-Code Data Science : Graph analytics, data pipelines, ETL workflows, Jupyter notebooks Required Qualifications Software Development … understanding of async programming Experience with Poetry or similar Python dependency management tools Experience building RESTful APIs and micro-services Solid understanding of database design and optimisation (both SQL and NoSQL) Experience with graph databases (Neo4j preferred) or willingness to learn quickly Knowledge of event-driven architectures and message ...

systems Integrate front-end applications with backend services and APIs Optimize application performance across both front-end and back-end layers Participate in system design discussions and contribute to solution architecture Your Skills: Bachelor’s degree in Computer Science, Engineering, or related field Strong proficiency in JavaScript (ES6+), HTML5 … State Management Strong proficiency in Java and frameworks like Spring Boot/Spring MVC Experience with state management libraries such as Redux or Context API Familiarity with RESTful APIs and asynchronous programming Experience with version control systems like Git Understanding of responsive design and cross-browser compatibility Familiarity ...

high-performing cloud practice. This is an opportunity to work at the forefront of cloud transformation, partnering with tier-one clients across industries to design and deliver innovative, scalable, and secure AWS solutions. Youll play a pivotal role in shaping enterprise cloud strategies while leading complex transformation programmes. … strategy Certifications & Education AWS Certification (Associate or Professional e.g. Solutions Architect, DevOps Engineer) Degree in Computer Science, Engineering, or related discipline Technical Expertise Architecture & Design Translating business needs into scalable cloud architectures Cost optimisation and cloud best practices Data & AI Experience with data platforms, analytics, and AI/ ...

delivery team building and enhancing cloud-native backend services within a modern enterprise environment. Role Overview The successful candidate will contribute to the design, development, and support of Java-based applications using Spring Boot and AWS , working as part of an Agile, multidisciplinary team. Alongside strong backend engineering skills … capability, enabling engineers to interrogate data and support business reporting requirements. This is a hands-on software engineering role with opportunities to contribute to API development, cloud-native architectures, and modern DevOps practices. Key Responsibilities Develop and maintain Java-based backend applications using Spring Boot Design and implement ...

Required Technology 15+ years of progressive software engineering; 5+ years leading AI‐native solutions at enterprise scale. Hands‐on with LLMs and agentic frameworks; design and deploy AI systems that augment SDLC (requirements → coding → testing → ops). Tooling & Platforms (practitioner proficiency) Claude Code (Anthropic) for secure, context‐rich code …/Gemini for research workflows where permitted; govern enterprise knowledge ingestion. Architecture & Integration Distributed systems, microservices, cloud‐native (Azure/AWS/GCP); secure API design (REST/GraphQL). MLOps & AIOps: CI/CD for AI, model lifecycle (eval, versioning, rollout/rollback), guardrails, telemetry, drift monitoring ...

systems that enable global commerce, while evolving an existing real-time platform to support new markets. You will address backend capacity constraints and help design a shared transaction and ledger layer used across multiple business lines. This is a hands-on senior engineering role requiring both high-quality delivery … strong technical leadership in ambiguous, high-scale environments. You will be expected to: Design scalable systems with correctness and failure modes considered from the outset Clarify and scope requirements before proposing solutions Make pragmatic trade-offs in system design, avoiding over-engineering Operate independently without reliance ...

best practice implementation across: Stateless architecture Health check endpoints Secure secret management (Azure Key Vault) Containerisation standards and deployment readiness The Integration Engine Lead API and integration strategy, including: RESTful API design OAuth2 authentication flows (including FusionAuth) Event-driven systems via Azure Service Bus Transactional email logic ...

Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

PostgreSQL, complex data modelling AI/ML : OpenAI integration, semantic search, conversational agents, unstructured data analysis and extraction Infrastructure : AWS (Lambda, ECS/EKS, API Gateway, S3) DevOps : Terraform, GitHub Actions, Helm, Infrastructure-as-Code Data Science : Graph analytics, data pipelines, ETL workflows, Jupyter notebooks Required Qualifications Software Development … understanding of async programming Experience with Poetry or similar Python dependency management tools Experience building RESTful APIs and micro-services Solid understanding of database design and optimisation (both SQL and NoSQL) Experience with graph databases (Neo4j preferred) or willingness to learn quickly Knowledge of event-driven architectures and message ...

product and infrastructure development. This is a broad, hands-on engineering role for someone who is comfortable moving between user-facing product work, backend API design, database modelling, cloud infrastructure, Kubernetes workloads, and deployment pipelines. You will work close to the core product: building interfaces scientists use every … platform as it moves from pilots into production customer environments. ## What you'll do - Build product features across React, Next.js, and TypeScript. - Design, build, and maintain backend Python backend services and APIs. - Own PostgreSQL database design, data modelling, schema migrations, and query performance. - Build and maintain infrastructure ...

just familiarity, but production ownership. Azure Integration: Proven experience building applications that consume Azure-native services, including Azure Key Vault for secrets, Azure Storage API, and Azure Service Bus for event-driven messaging. DevOps Mindset: Solid understanding of the full CI/CD lifecycle; comfortable reading and contributing … Dockerfiles and GitHub Actions YAML workflows - not as a DevOps engineer, but as a developer who understands the pipeline their code flows through. API Mastery: Deep expertise in RESTful API design principles, OAuth2 authentication flows (including FusionAuth integration), and DMARC-compliant transactional email logic via SendGrid. Duties ...

just familiarity, but production ownership. Azure Integration: Proven experience building applications that consume Azure-native services, including Azure Key Vault for secrets, Azure Storage API, and Azure Service Bus for event-driven messaging. DevOps Mindset: Solid understanding of the full CI/CD lifecycle; comfortable reading and contributing … Dockerfiles and GitHub Actions YAML workflows - not as a DevOps engineer, but as a developer who understands the pipeline their code flows through. API Mastery: Deep expertise in RESTful API design principles, OAuth2 authentication flows (including FusionAuth integration), and DMARC-compliant transactional email logic via SendGrid. Duties ...

manage technology teams to deliver high-quality software solutions. Collaborate with stakeholders to understand business requirements and translate them into technical deliverables. Oversee the design, development, and implementation of technical solutions. Ensure best practices in coding, testing, and deployment are followed. Provide technical mentorship and guidance to team members. … modern Java (17+) is non-negotiable. 2+ years leading engineering teams or operating as a tech lead/lead engineer with ownership of design and delivery outcomes. Deep Spring Boot expertise: REST APIs, Spring Security, Spring Data, Spring Cache; proven ability to set patterns others follow. Strong command ...

cloud-native systems across the business by making security tooling fast, reliable, and seamless for every development team. You will be responsible for Design, develop, and maintain scalable REST APIs using Django. Build and operate asynchronous task pipelines (Celery/Redis) that orchestrate security scanning at scale. Ensure best … practices for code quality, performance, and security. Integrate robust security practices into all API layers, including authentication, authorization, data validation, and protection against vulnerabilities. Develop and manage CI/CD pipelines for automated testing, deployment, and monitoring. Work closely with core devops teams or independently handle infrastructure and deployment ...

Build the backend for our core product services and AI-powered features, using Python/FastAPI to ship stable, scalable systems. Design and implement model calls, retrieval-augmented generation (RAG), context engineering, tool calling, and workflow orchestration across use cases spanning academic-content understanding, workflow assistance, output generation … product, frontend, and platform teams to take new features from validation to production, continuously improving quality, latency, stability, and cost. Contribute to the design of data structures, knowledge-base interfaces, evaluation mechanisms, and service governance to keep the overall system maintainable. What we're looking for A solid backend ...