326 to 350 of 353 API Design Jobs in the UK

seamlessly via APIs. This is the opportunity to make a real impact in a rapidly growing team, while working on cutting-edge AI technology. What You'll Work On: Design and implement scalable backend systems using Python (FastAPI, Flask, or Django) Integrate AI-generated code into production-ready services Take ownership of projects from idea to production — collaborating across … teams Experiment with LLM- and agentic-coding workflows to accelerate development Who You Are: 5+ years of experience in back-end development (Python based stack ideally) Strong understanding of API design and systems architecture Strong communication and collaboration skills Exposure to AI, LLMs or modern ML-backed systems is a plus! Apply now or reach out directly: hhandelman More ❯

role serves as a trusted advisor to both internal and external partners within the Java ecosystem. As a Java Solution Architect, one must possess knowledge of overall architecture/design for Java implementations across multiple projects or one large complex project under the leadership of a lead Architect. Your responsibilities: • Driving discussion with Client and Business Users on Solution … Design. • Retrofitting Business Requirement in Java landscape based on the current architecture and Solution Design . • Documenting Functional Requirement, with Solution Design. • Designing and implementing scalable and flexible program architectures that support point-based tiered, and personalized structures . • Integrate solutions with POS systems, e-commerce platforms, and mobile apps for seamless customer experience. • Define architecture for marketing automation … platforms, campaign management systems, and CRM solutions. • Design API-driven architectures for integrating third-party marketing platforms, ad networks, and analytics tools. Leverage cloud-native technologies (AWS/GCP) for scalability, performance, and cost-efficiency. •Collaborate with cross-functional teams to determine the best implementation strategies for Java solutions. • You must Lead and prioritization/scoping of business More ❯

open data space, who are currently seeking an experienced Senior iOS Developer. You will be responsible for building and maintaining new and exciting features while also driving technical discussions, API designs and architecture. 3+ years of commercial experience with iOS development. Good experience with automated testing. If you're a Senior iOS Developer looking to work for a rapidly More ❯

open data space, who are currently seeking an experienced Senior iOS Developer. You will be responsible for building and maintaining new and exciting features while also driving technical discussions, API designs and architecture. You will get the opportunity to make a big impact in a rapidly growing business. Their culture is based on working together, collaboration and being supportive More ❯

open data space, who are currently seeking an experienced Senior iOS Developer. You will be responsible for building and maintaining new and exciting features while also driving technical discussions, API designs and architecture. You will get the opportunity to make a big impact in a rapidly growing business. Their culture is based on working together, collaboration and being supportive More ❯

Role: Java Technical Lead Type: Contract Location: Farnborough, UK (1 day/week) About the Role We are seeking a highly skilled and experienced Senior Java Developer to design, develop, and maintain robust, scalable, and high-performance applications. The ideal candidate will have deep expertise in Core Java, Spring Framework, and Microservices architecture, along with hands-on experience in … AWS cloud services and automation tools like Terraform or Ansible. Key Responsibilities • Design, develop, and deploy scalable Java-based applications using Spring 11/17 and Microservices architecture. • Develop RESTful APIs and integrate with front-end systems built on Angular. • Collaborate with cross-functional teams to deliver secure, efficient, and maintainable software solutions. • Implement and manage cloud infrastructure using … and procedures for backend database operations. Required Skills & Qualifications • Strong proficiency in Core Java, OOPs concepts, and Spring 11/17 Framework. • Hands-on experience with Microservices and RESTful API design. • Experience with AWS cloud services (EC2, Lambda, S3, RDS, etc.). • Proficiency in Terraform or Ansible for infrastructure automation. • Working knowledge of Angular or similar UI frameworks. • Solid More ❯

Role: Java Technical Lead Type: Contract Location: Farnborough, UK (1 day/week) About the Role We are seeking a highly skilled and experienced Senior Java Developer to design, develop, and maintain robust, scalable, and high-performance applications. The ideal candidate will have deep expertise in Core Java, Spring Framework, and Microservices architecture, along with hands-on experience in … AWS cloud services and automation tools like Terraform or Ansible. Key Responsibilities • Design, develop, and deploy scalable Java-based applications using Spring 11/17 and Microservices architecture. • Develop RESTful APIs and integrate with front-end systems built on Angular. • Collaborate with cross-functional teams to deliver secure, efficient, and maintainable software solutions. • Implement and manage cloud infrastructure using … and procedures for backend database operations. Required Skills & Qualifications • Strong proficiency in Core Java, OOPs concepts, and Spring 11/17 Framework. • Hands-on experience with Microservices and RESTful API design. • Experience with AWS cloud services (EC2, Lambda, S3, RDS, etc.). • Proficiency in Terraform or Ansible for infrastructure automation. • Working knowledge of Angular or similar UI frameworks. • Solid More ❯

and are looking for a skilled and experienced Lead MuleSoft Consultant to join our growing team. The successful candidate will be responsible for leading MuleSoft projects responsible for the design, development and integration solutions that connect Salesforce with enterprise systems, cloud applications and data services. Why Alscient We are experts in digital transformation and are proud to be a … to make an immediate impact by providing solution input when required and able to lead on a variety of customer engagements. Key Responsibilities Include: Lead the end-to-end design and delivery of MuleSoft APIs, integrations, event-driven flows, and orchestration layers, ensuring performance, scalability, error handling and monitoring. Architect robust integration solutions connecting Salesforce (Sales Cloud, Service Cloud … quality throughout. Drive proof of concepts, spike work, technology evaluations, and platform upgrades (MuleSoft versions, connectors). Translate business requirements into integration solutions, ensuring scalability, security and maintainability. Implement API-led connectivity following MuleSoft best practices. Create technical documentation, API specifications (RAML/OAS), and deployment guides. Conduct unit testing, debugging and performance optimisation. Collaborate with Salesforce teams More ❯

and are looking for a skilled and experienced Lead MuleSoft Consultant to join our growing team. The successful candidate will be responsible for leading MuleSoft projects responsible for the design, development and integration solutions that connect Salesforce with enterprise systems, cloud applications and data services. Why Alscient We are experts in digital transformation and are proud to be a … to make an immediate impact by providing solution input when required and able to lead on a variety of customer engagements. Key Responsibilities Include: Lead the end-to-end design and delivery of MuleSoft APIs, integrations, event-driven flows, and orchestration layers, ensuring performance, scalability, error handling and monitoring. Architect robust integration solutions connecting Salesforce (Sales Cloud, Service Cloud … quality throughout. Drive proof of concepts, spike work, technology evaluations, and platform upgrades (MuleSoft versions, connectors). Translate business requirements into integration solutions, ensuring scalability, security and maintainability. Implement API-led connectivity following MuleSoft best practices. Create technical documentation, API specifications (RAML/OAS), and deployment guides. Conduct unit testing, debugging and performance optimisation. Collaborate with Salesforce teams More ❯

designing APIs, building responsive front-ends, and will work in close coordination with in-house and client development teams to deliver required updates and improvements. What You'll Do: Design, build, and maintain efficient, reusable, and reliable code using C#, .NET Core/Framework. Develop front-end components using modern JavaScript frameworks (e.g., React, Angular, or Vue). Build … with .NET (Core or Framework), C#, and modern web development. Experience with a front-end framework like React, Angular, or Vue. Solid understanding of HTML, CSS, JavaScript, and RESTful API design. Experience working with SQL and/or NoSQL databases. Familiarity with Git, CI/CD pipelines, and cloud platforms (e.g., Azure ). Strong problem-solving skills and a More ❯

designing APIs, building responsive front-ends, and will work in close coordination with in-house and client development teams to deliver required updates and improvements. What You'll Do: Design, build, and maintain efficient, reusable, and reliable code using C#, .NET Core/Framework. Develop front-end components using modern JavaScript frameworks (e.g., React, Angular, or Vue). Build … with .NET (Core or Framework), C#, and modern web development. Experience with a front-end framework like React, Angular, or Vue. Solid understanding of HTML, CSS, JavaScript, and RESTful API design. Experience working with SQL and/or NoSQL databases. Familiarity with Git, CI/CD pipelines, and cloud platforms (e.g., Azure ). Strong problem-solving skills and a More ❯

Lead Software Engineer – Azure/.NET Remote/London (occasional office visits) £Competitive + 20% bonus + excellent benefits Azure, C#, .NET, API A Lead Software Engineer with strong experience in Azure and C#/.NET is required by a global, prestigious luxury brand. This is a hands-on leadership role where you will translate architectural vision into high … performance, enterprise-grade solutions. Working closely with the Global Head of Engineering and a talented global team of developers and architects, you will plan, design, and deliver scalable, secure, and automated cloud platforms within Microsoft Azure. The organisation has beautiful offices in the West End, with a requirement to attend approximately once a fortnight. Key Responsibilities: Design and … deliver high-performance, public-facing REST APIs and system integrations within a modern Azure environment. Produce API documentation that adheres to OpenAPI 3.x standards. Lead and mentor a small, focused development team, promoting collaboration, code quality, and technical excellence. Modernise legacy systems and drive the development of next-generation, cloud-native solutions aligned with architectural best practices. Champion DevOps More ❯

Tech Lead – Azure/.NET Remote/London (occasional office visits) circa £95 - 100k + 20% bonus + excellent benefits Azure, C#, .NET, API A Lead Software Engineer with strong experience in Azure and C#/.NET is required by a global, prestigious luxury brand. This is a hands-on leadership role where you will translate architectural vision into … high-performance, enterprise-grade solutions. Working closely with the Global Head of Engineering and a talented global team of developers and architects, you will plan, design, and deliver scalable, secure, and automated cloud platforms within Microsoft Azure. The organisation has beautiful offices in the West End, with a requirement to attend approximately once a fortnight. Key Responsibilities: Design and deliver high-performance, public-facing REST APIs and system integrations within a modern Azure environment. Produce API documentation that adheres to OpenAPI 3.x standards. Lead and mentor a small, focused development team, promoting collaboration, code quality, and technical excellence. Modernise legacy systems and drive the development of next-generation, cloud-native solutions aligned with architectural best practices. More ❯

Tech Lead – Azure/.NET Remote/London (occasional office visits) circa £95 - 100k + 20% bonus + excellent benefits Azure, C#, .NET, API A Lead Software Engineer with strong experience in Azure and C#/.NET is required by a global, prestigious luxury brand. This is a hands-on leadership role where you will translate architectural vision into … high-performance, enterprise-grade solutions. Working closely with the Global Head of Engineering and a talented global team of developers and architects, you will plan, design, and deliver scalable, secure, and automated cloud platforms within Microsoft Azure. The organisation has beautiful offices in the West End, with a requirement to attend approximately once a fortnight. Key Responsibilities: Design and deliver high-performance, public-facing REST APIs and system integrations within a modern Azure environment. Produce API documentation that adheres to OpenAPI 3.x standards. Lead and mentor a small, focused development team, promoting collaboration, code quality, and technical excellence. Modernise legacy systems and drive the development of next-generation, cloud-native solutions aligned with architectural best practices. More ❯

front-end interfaces in React . Core Responsibilities for this Developer role: Develop, maintain, and enhance cloud-based applications and services . Focus on Node.js backend development and RESTful API design. Collaborate with designers, product owners, and fellow developers in an agile environment . Build and optimise front-end features using React. Apply Test-Driven Development (TDD) principles to … and estimations. Core Skills & Experience 5+ years experience developing commercial software and web applications . Strong proficiency in TypeScript for building data-heavy applications. Skilled in Node.js backend and API development. Proficient with React for front-end development. Hands-on experience with unit testing and TDD . Confident managing branches with Git . Detail-oriented with a focus on … growing, forward-thinking company. To apply, send your CV to Bethany at Or call 0161 438 1177 for more details. Keywords: Fullstack Developer, TypeScript, Node.js, React, Azure DevOps, JavaScript, API Development, Birmingham, West Midlands, Solihull, Warwickshire Erin Associates Ltd is acting as an Employment Agency in relation to this vacancy. More ❯

world impact. We value continuous learning, personal growth, and providing our team with the resources they need to succeed. Ready to shape the future? Let's talk. Role overview Design and own the architecture for new features and services on our core microservices platform. Champion robust, scalable solutions leveraging microservice patterns, event-driven architectures, and best-in-class technology … to deliver customer and business value. This role will require attendance at our London office 2-3 days per week Key Responsibilities Architectural Leadership Design end-to-end solutions for new features and platform enhancements on our microservices stack. Lead architecture reviews and propose designs that are scalable, secure, and aligned with business requirements. Document architecture decisions and communicate … and recommend technology choices, ensuring long-term extensibility and maintainability. Partner with engineering, product, and delivery teams to translate high-level requirements into actionable technical designs. Contribute to defining API contracts, data flows, and integration patterns. Technical Stewardship Apply microservice and event-driven architectural patterns, leveraging technologies such as Kafka for asynchronous communication and decoupling. Champion operational excellence, supporting More ❯

working across the stack - designing APIs, building responsive front-ends, and will work in close coordination with in-house and client development teams to deliver required updates and improvements. Design, build, and maintain efficient, reusable, and reliable code using C#, .NET Core/Framework. Develop front-end components using modern JavaScript frameworks (e.g., React, Angular, or Vue). Ensure … deployment. NET (Core or Framework), C#, and modern web development. Experience with a front-end framework like React, Angular, or Vue. Solid understanding of HTML, CSS, JavaScript, and RESTful API design. Experience working with SQL and/or NoSQL databases. Bonus Points For: Experience with React Native Flexible working hours and remote work options. Competitive salary and benefits package. More ❯

of the mobile app (React Native) and backend (Node.js or Python/FastAPI). Integrate with Open Banking APIs (TrueLayer, Yapily, etc.) to securely connect and manage financial data. Design and implement pipelines to analyse transaction data and user conversations using embeddings and vector databases (Pinecone, Qdrant, etc.). Ensure best practice in data security and compliance, including OAuth2 … technical ownership in a fast-paced startup. Proficient with React Native (or strong React + mobile experience). Backend experience with Node.js or Python (FastAPI/Django) and RESTful API design. Experience integrating Open Banking APIs (TrueLayer, Yapily, Salt Edge, etc.). Hands-on experience with AI/LLM-powered systems — especially embedding models (OpenAI, Cohere, Sentence Transformers) and More ❯

developers + DevOps engineers) delivering secure, scalable, and high-availability AI systems. Own AWS-based infrastructure: Lambda, EC2, S3, CloudFormation/Terraform, CloudWatch, and VPC security. Oversee JSON-based API integrations, data pipelines, and serverless event-driven architectures. Implement continuous integration and deployment (CI/CD) pipelines for code, models, and infrastructure. Ensure DevSecOps best practices - patching, logging, monitoring … or AWS CodePipeline). Proven ability to secure and scale production systems. Monitoring and observability tools (CloudWatch, Grafana, OpenTelemetry). Familiar with data exchange formats (JSON, YAML, Parquet) and API design. Leadership & Delivery 4-8 years in software development and/or DevOps, including 2+ in a management or team lead role. Experience in defence, aerospace, or regulated sectors More ❯

developers + DevOps engineers) delivering secure, scalable, and high-availability AI systems. Own AWS-based infrastructure : Lambda, EC2, S3, CloudFormation/Terraform, CloudWatch, and VPC security. Oversee JSON-based API integrations , data pipelines, and serverless event-driven architectures. Implement continuous integration and deployment (CI/CD) pipelines for code, models, and infrastructure. Ensure DevSecOps best practices — patching, logging, monitoring … or AWS CodePipeline). Proven ability to secure and scale production systems. Monitoring and observability tools (CloudWatch, Grafana, OpenTelemetry). Familiar with data exchange formats (JSON, YAML, Parquet) and API design. Leadership & Delivery 4–8 years in software development and/or DevOps , including 2+ in a management or team lead role. Experience in defence, aerospace, or regulated sectors More ❯

developers + DevOps engineers) delivering secure, scalable, and high-availability AI systems. Own AWS-based infrastructure : Lambda, EC2, S3, CloudFormation/Terraform, CloudWatch, and VPC security. Oversee JSON-based API integrations , data pipelines, and serverless event-driven architectures. Implement continuous integration and deployment (CI/CD) pipelines for code, models, and infrastructure. Ensure DevSecOps best practices — patching, logging, monitoring … or AWS CodePipeline). Proven ability to secure and scale production systems. Monitoring and observability tools (CloudWatch, Grafana, OpenTelemetry). Familiar with data exchange formats (JSON, YAML, Parquet) and API design. Leadership & Delivery 4–8 years in software development and/or DevOps , including 2+ in a management or team lead role. Experience in defence, aerospace, or regulated sectors More ❯

developers + DevOps engineers) delivering secure, scalable, and high-availability AI systems. Own AWS-based infrastructure : Lambda, EC2, S3, CloudFormation/Terraform, CloudWatch, and VPC security. Oversee JSON-based API integrations , data pipelines, and serverless event-driven architectures. Implement continuous integration and deployment (CI/CD) pipelines for code, models, and infrastructure. Ensure DevSecOps best practices — patching, logging, monitoring … or AWS CodePipeline). Proven ability to secure and scale production systems. Monitoring and observability tools (CloudWatch, Grafana, OpenTelemetry). Familiar with data exchange formats (JSON, YAML, Parquet) and API design. Leadership & Delivery 4–8 years in software development and/or DevOps , including 2+ in a management or team lead role. Experience in defence, aerospace, or regulated sectors More ❯

worldwide while shaping the future of a fast-growing deep-tech startup. What You’ll Do As an early employee, you’ll take ownership of building our core platform: • Design and develop the core CMS and 3D rendering platform to power our AI-based digital inspector. • Work on cutting-edge problems such as processing massive LiDAR datasets, implementing real … backend systems like Node.js and Next.js. • Knowledge of 3D rendering tools (Three.js) and familiarity with Azure for scalable application development. • A solid understanding of system architecture, data schemas, and API design. • Bonus: Experience with C++ or OpenGL for advanced point cloud 3D rendering. Mindset & Motivation: • Passion for deep-tech innovation and excitement to tackle big, meaningful problems. • A desire More ❯

worldwide while shaping the future of a fast-growing deep-tech startup. What You’ll Do As an early employee, you’ll take ownership of building our core platform: • Design and develop the core CMS and 3D rendering platform to power our AI-based digital inspector. • Work on cutting-edge problems such as processing massive LiDAR datasets, implementing real … backend systems like Node.js and Next.js. • Knowledge of 3D rendering tools (Three.js) and familiarity with Azure for scalable application development. • A solid understanding of system architecture, data schemas, and API design. • Bonus: Experience with C++ or OpenGL for advanced point cloud 3D rendering. Mindset & Motivation: • Passion for deep-tech innovation and excitement to tackle big, meaningful problems. • A desire More ❯

transformation and is looking for a Senior Security Engineer with a specialism within Cloud to help shape and secure its modern cloud infrastructure. Youll work across engineering teams to design scalable, secure cloud infrastructure and embed best practices from day one. Youll be joining at a pivotal time as the company invests heavily in scaling its security capabilities. This … wants to influence how secure, scalable systems are built in a fast-moving, AWS native environment. Senior Security Engineer, Cloud Responsibilities: Apply software development and security engineering expertise to design secure, scalable cloud solutions. Develop and maintain security baselines for cloud infrastructure (primarily AWS), including automation for configuration scanning and remediation. Act as a subject matter expert on cloud … security within engineering, providing guidance during design reviews and threat modelling sessions. Harden Kubernetes environments and enforce secure cluster configurations. Secure and manage infrastructure using Infrastructure-as-Code, with a focus on Terraform. Senior Security Engineer, Cloud Requirements: 5+ years of hands-on experience in cloud security, with deep expertise in AWS. Strong background in secure infrastructure design More ❯