26 to 50 of 149 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 ...

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 ...

love to come to work, every single day. Come join our team! This is a hybrid 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 … 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 ...

flexible work model, and career development resources to fuel employees’ passion for travel and ensure a rewarding career journey. In this role, you will: Design, develop, and apply machine learning solutions to real‐world personalization, product, and business problems, translating ambiguous opportunities into scalable models, experiments, and production‐ready … strong attention to measurable impact. Partner closely with engineers, product, and business stakeholders to integrate machine learning solutions into services and workflows, including system design, API design, and data modeling considerations. Use strong technical judgment to select appropriate methods, validate outcomes, and improve model performance, reliability ...

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 ...

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 ...

GlobalLogic, a Hitachi Group Company and a leader in digital engineering. We help brands across the globe design and build innovative products, platforms, and digital experiences for the modern world. By integrating experience design, complex engineering, and data expertise - we help our clients imagine what’s possible … Experience with: Experience with Python for data pipelines, export services, ETL, reconciliation, profiling scripts Data quality assessment Apache Kafka PostgreSQL for data modelling, query design, migrations etc Data modelling and schema design REST API design Ideally you will have: Experience of C# to be able ...

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 ...

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 ...

transformation and ensuring data is protected and used ethically. Talan UK & Ireland provides a range of consultancy and outsourcing capabilities including programme management, market design and governance. We also have extensive and award-winning capabilities across cyber security, data privacy and digital transformation. We are a Great Place … recruiting an ambitious and technically accomplished Solutions Architect to join our Digital business unit as a Principal Consultant. You will lead the design and delivery of scalable, secure, and cloud-native platforms across Energy (including Low Carbon and UK regulatory systems), Financial Services, Public Sector, and Healthcare domains. This ...

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 ...

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 ...

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/ ...

looking for an experienced Senior Java Developer to join a high-performing engineering team. You will take a lead role in the design and delivery of complex, enterprise-scale solutions, bringing strong Java, AWS, and API expertise to a programme that is making a real difference to patient … care across the country. KEY RESPONSIBILITIES Lead the design and development of robust, scalable Java-based applications across the programme Build and maintain cloud-native solutions on AWS, applying well-architected principles throughout Design, develop, and test REST APIs to a high standard, ensuring performance, reliability, and security ...

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 ...

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 ...

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex … operations with ease. They’re now seeking a Lead PHP Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. ...

Senior Developer, Back End, API, .Net SQL, NW London to £80K (office based role) A Senior Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed … required with expertise in .NET, C#/VB, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

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 ...

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 ...

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 ...

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 ...