26 to 50 of 117 API Design Jobs in London

verify the quality of systems-level and infrastructure code and identify error patterns. Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them. Design verification mechanisms that can automatically verify …/C++, Rust, and Go. Experience building and deploying scalable, production-grade software using modern languages and tools. Deep understanding of software architecture, design, development, debugging, and code quality/review assessment. Excellent oral and written communication skills for clear, structured evaluation rationales. Engagement Details: Commitment: flexible engagement, minimum ...

verify the quality of systems-level and infrastructure code and identify error patterns. Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them. Design verification mechanisms that can automatically verify …/C++, Rust, and Go. Experience building and deploying scalable, production-grade software using modern languages and tools. Deep understanding of software architecture, design, development, debugging, and code quality/review assessment. Excellent oral and written communication skills for clear, structured evaluation rationales. Engagement Details: Commitment: flexible engagement, minimum ...

tools in Python that can verify the quality of code and identify error patterns. Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them. Design verification mechanisms that can automatically … building production-grade software. Experience building full-stack applications and deploying scalable software using modern languages and tools. Deep understanding of software architecture, design, development, debugging, and code quality/review assessment. Excellent oral and written communication skills for clear, structured evaluation rationales. Engagement Details: Commitment: flexible engagement, minimum ...

tools in Python that can verify the quality of code and identify error patterns. Hypothesize on steps in the software engineering cycle (prototyping, architecture design, API design, production implementation, launch, experiments, monitoring, operational maintenance) and evaluate model capabilities on them. Design verification mechanisms that can automatically … building production-grade software. Experience building full-stack applications and deploying scalable software using modern languages and tools. Deep understanding of software architecture, design, development, debugging, and code quality/review assessment. Excellent oral and written communication skills for clear, structured evaluation rationales. Engagement Details: Commitment: flexible engagement, minimum ...

real scope to shape how the engineering team operates. Responsibilities as a Tech Lead: Own technical direction across the backend monolith, covering architecture decisions, API design, system reliability, and background job performance Drive end-to-end delivery, from scoping and estimation through to execution, managing trade-offs between … professional Ruby on Rails experience in production, with a solid grasp of monolith architecture and full-stack troubleshooting Experience with PostgreSQL, Redis and RESTful API design Comfortable with AWS-based infrastructure and Docker in development or production environments Proven ability to act as a genuine escalation point, with ...

come to work, every single day. Come join our team! This is an office-based position. Responsibilities The Expert Software Architect leads the design of complex, high-impact software systems, creating scalable, secure architectures that align with business strategy and technology roadmaps. This role shapes architectural decisions across multiple … cloud modernisation, AI enablement, and cost‐of‐ownership optimisation. The Expert Software Architect translates business strategy into actionable architectural frameworks, guiding teams through complex design decisions and trade‐offs across performance, security, scalability, maintainability, and compliance. Architecture Leadership Lead the design of scalable, high-performing architectures across complex ...

business-critical integration platform. Partner with senior technology stakeholders to ensure alignment with enterprise architecture principles and future technology strategy. Define architecture standards, design patterns, and engineering best practices. Provide hands-on technical leadership while remaining actively involved in solution design and development. Design secure, scalable, event … large-scale enterprise environments. Strong software engineering background with C# and .NET Core. Experience designing and implementing microservices architectures. Strong understanding of Domain-Driven Design (DDD). Expertise in API design, security, governance, and API Management technologies. Experience with messaging technologies such as RabbitMQ, Kafka ...

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 ...

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 ...

scale. EY has been selected for the inaugural Frontier Firm AI Initiative — a collaboration between Microsoft and Harvard’s Digital Data Design Institute — recognising EY’s leadership in shaping enterprise-grade human–AI operating models. In parallel, EY is expanding its collaboration with OpenAI and Microsoft, bringing advanced … adoption. However, many struggle to translate ideas into secure, scalable and reliable production solutions. As a Forward Deployed Engineer, you will contribute to the design and delivery of AI-enabled systems that operate reliably in enterprise environments. Working within a delivery squad, you will take ownership of defined engineering ...

Full Stack Engineer with a strong back‐end focus to join one of our Profile domain product teams. This role is full stack by design: you will work across back‐end and front‐end codebases, contributing to end‐to‐end product delivery. However, your primary strength will … front end. You will join an established, autonomous product team owning their product end‐to‐end, with real ownership over technical design, implementation, and continuous improvement. Your responsibilities Design, build and evolve scalable back-end services using C# and .NET Core, alongside developing front-end features with modern ...

Python (pyspark): Experience with data pipelines and analytics is a plus. Power BI: Familiarity with developing dashboards and data models. Architecture: Knowledge of microservices, API design, and event-driven architectures. DevOps/CI/CD: Experience with Azure DevOps, GitLab, GitHub Actions, or similar tools. Cloud Platforms: Proficient … Azure preferred). Databases: Strong skills in SQL Server, PostgreSQL, or other relational databases. containerisation: Experience with Docker and Kubernetes. Key Responsibilities Design & Develop: Create and maintain full stack applications using React JS and C#.NET Core. Build Services: Develop high-performance backend services and RESTful APIs with a focus ...

Overview A global enterprise organisation is looking to hire a Full Stack Engineer/Technical Lead to drive the design and delivery of an internal AI-enabled platform focused on workflow automation and support operations. This role blends hands-on engineering with technical leadership, owning delivery across frontend, backend … scalability, security, and resilience Full Stack Engineering Build user-facing applications for internal users and support teams Develop backend services, APIs, and workflow engines Design and implement AI-powered workflows using LLMs Build features such as chat interfaces, task automation, and case management Implement guardrails, error handling, fallback logic ...

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. You'll 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/ ...

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 ...

embedded delivery team supporting client's technology and product teams as a senior technical lead within an agile environment. What You'll Do Design, build, and maintain scalable, production-grade software across web, API, and data layers Own technical delivery end-to-end from requirements gathering through … stack Strong proficiency in at least two languages (e.g. Python, TypeScript, C#, Node.js), with confidence picking up others as needed Solid grounding in RESTful API design, microservices architecture, and cloud-native development (Azure preferred) Proven experience with CI/CD pipelines, (Docker/Kubernetes), and DevOps practices Strong ...

Spring Boot background to support customer‐specific delivery workstreams and wider digital transformation projects. The role requires hands‐on architecture experience across modern service design, integration, cloud‐hosted platforms and delivery governance. The successful candidate will help shape robust, maintainable and scalable services, working closely with engineering teams, delivery … Boot services and supporting platform components. Produce high‐quality architecture artefacts including HLDs, LLDs, roadmaps, integration patterns, sequence diagrams and data models. Lead technical design governance, ensuring alignment with enterprise architecture principles, GDS Service Standard and delivery best practice. Provide technical assurance across delivery teams, suppliers and stakeholders. ...

Spring Boot background to support customer-specific delivery workstreams and wider digital transformation projects. The role requires hands-on architecture experience across modern service design, integration, cloud-hosted platforms and delivery governance. The successful candidate will help shape robust, maintainable and scalable services, working closely with engineering teams, delivery … Boot services and supporting platform components. Produce high-quality architecture artefacts including HLDs, LLDs, roadmaps, integration patterns, sequence diagrams and data models. Lead technical design governance, ensuring alignment with enterprise architecture principles, GDS Service Standard and delivery best practice. Provide technical assurance across delivery teams, suppliers and stakeholders. ...

work with modern JVM languages (primarily Kotlin), cloud‐native technologies, and contemporary frontend frameworks. What you’ll be building: World-Class Distributed Systems - Design and implement highly performant, fault‐tolerant distributed services that handle massive scale with grace. You'll architect systems that are built to survive failures, scale … Java , Scala , or Clojure experience translates beautifully). Cloud‐Native Mindset – Hands‐on experience with cloud platforms (AWS, Azure, GCP) and understanding of cloud design patterns. Messaging & Events – Solid grasp of messaging technologies (Kafka, RabbitMQ, SQS, NATS) and event‐driven architecture patterns. Data Layer Expertise – Experience with both ...

work on impactful features that directly shape our platform and make a real difference to our customers. What you’ll do Design, build, and ship high-quality front-end features using TypeScript and Vue.js. Own features end-to-end: translating product requirements and Figma prototypes into intuitive user experiences … applications. Strong experience with TypeScript and Vue.js, ideally in complex SaaS or B2B product environments. Solid understanding of modern front-end architecture: component design, state management, routing, API integration, testing, and performance. Experience building maintainable design systems or reusable component libraries. Comfortable working closely with APIs, understanding ...

work on impactful features that directly shape our platform and make a real difference to our customers. What you’ll do Design, build, and ship high-quality front-end features using TypeScript and Vue.js. Own features end-to-end: translating product requirements and Figma prototypes into intuitive user experiences … applications. Strong experience with TypeScript and Vue.js, ideally in complex SaaS or B2B product environments. Solid understanding of modern front-end architecture: component design, state management, routing, API integration, testing, and performance. Experience building maintainable design systems or reusable component libraries. Comfortable working closely with APIs, understanding ...

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 ...

Principal Software Engineer, Platform – BPL This role is responsible for driving technical excellence and innovation by leading the design and implementation of robust software solutions, providing mentorship to engineering teams, fostering cross‐functional collaboration, and contributing to strategic planning to ensure the delivery of high‐quality solutions aligned with … technical excellence. Contribute to strategic planning by aligning technical decisions with business goals, anticipating future technology trends, and providing insights to optimize product roadmaps. Design and implement complex, scalable, and maintainable software solutions, considering long‐term viability and business objectives. Mentor and coach junior and mid‐level engineers ...

fill the role of ‘Applications Development Technology Lead Analyst’ on the XiNG large scale distributed calculation platform (XiP). In this role you will design, build, and maintain the calculation engine at the heart of the XiP platform. This engine is responsible for c. 0.5 billion risk & suitability calculations … designing improvements to the distribution mechanisms of the engine which regularly parallelizes 250,000 hours of compute into a single 90‐minute execution: Lead design, development, and implementation of enhancements, focusing on optimizing distribution mechanisms, analyze current parallelization strategies, and identify opportunities to further improve efficiency, scalability, and throughput. ...

impact role delivering large-scale enterprise cloud transformation programmes using AWS. What the Role Involves: As an AWS Solution Architect (Integration Specialist), you will: Design and deliver AWS cloud-native workloads using serverless, microservices, and containerised architectures Build scalable, resilient, and secure integration solutions across enterprise systems Develop … Oracle What You'll Need: Hands-on experience as an AWS Solution Architect (Integration Specialist) with Lambda and Kubernetes (EKS) Strong knowledge of API design and security (API Gateway, OpenAPI, OAuth2, JWT) Experience with cloud-native frameworks such as Flask or FastAPI Solid understanding of Kubernetes security ...