1 to 25 of 100 API Design Jobs in the UK excluding London

Senior Software Engineer - Building APIs - RESTful API - AI Services - C# .Net - SQL - Azure We are seeking an experienced Senior API Developer with solid experience in designing and implementing API Infrastructure. This is an opportunity to work on cutting-edge AI infrastructure, make a significant impact on how to leverages AI technology at scale. The role suits a … technically strong Senior Software API Developer who enjoys building new solutions, solving complex integration challenges. Working with autonomy and technical ownership, you'll architect scalable, secure APIs that handle sensitive data while enabling rapid deployment of AI capabilities across the business. As a senior member of the team, you'll set architectural direction, establish API standards, and mentor … other engineers while building production-grade integrations that power real customer value. Key Responsibilities API Architecture & Design Design and implement RESTful APIs that expose the product capabilities to AI services and third-party integrations Architect scalable, secure API infrastructure serving multiple products and consumers Establish API design standards, patterns, and best practices across the More ❯

Solution Architect - Client-facing | TypeScript | API Design | Hybrid (2 Days Onsite in Central London) | £105,000-£110,000 + 15% Discretionary Bonus Method Resourcing is thrilled to be partnering with a global leader in the travel industry who are hiring a Client-facing Solution Architect to join a high-performing architectural team. This is a brand-new role … role that balances strong software knowledge with excellent stakeholder management and communication. What you'll be doing: Lead client-facing solution architecture discussions - mapping technical needs to platform capabilities Design and communicate system architecture diagrams, data flows, and API integrations Build prototypes and proof-of-concepts to test ideas and drive alignment Translate complex requirements into clear deliverables … for both technical and non-technical audiences Collaborate closely with internal engineering and product teams to ensure smooth handover and scalable design Skills and experience we are looking for: Strong software development background (ideally TypeScript and Node) Hands-on experience in solution architecture and API design Ability to build and communicate technical diagrams, flows, and documentation Strong More ❯

require an experienced Senior Software Engineer to lead the architecture, development and maintenance of a cross-platform Software Development Kit (SDK). The successful Senior Software Engineer will also design intuitive Graphical User Interfaces (GUIs) and integrate advanced third-party hardware drivers (USB3, CoaXPress, CameraLink). This is a senior technical role combining strategic architectural input with hands-on … Work with high-performance imaging hardware and advanced driver integrations. Attractive Package - Competitive salary, benefits, and genuine opportunities for professional growth. The Role SDK Development & Architecture Lead the architecture, design, and implementation of an SDK for internal and external developers/customers. Establish coding standards, API design guidelines, and best practices to ensure SDK usability and maintainability. … enable seamless hardware communication. Troubleshoot and optimize performance for high-throughput data interfaces. Collaborate with hardware vendors to ensure driver compatibility and long-term support. Graphical User Interface (GUI) Design & Development Design and develop intuitive basic GUIs that integrate seamlessly with the SDK for R&D debug, production QC and customer demo. Collaborate with the product teams to More ❯

is welcome; join us and let's build what's next - together! We are seeking a Senior Software Engineer to join our team in Manchester! Your Impact Software Development: Design, implement, and maintain scalable, maintainable, and efficient Python-based applications, focusing on backend and full-stack development. Collaboration & Communication: Work closely with product managers, designers, and other engineers to … familiarity with CI/CD pipelines (e.g., Jenkins, GitLab CI). Testing and Debugging: Experience with testing tools like pytest, unit tests, and debugging skills to quickly resolve issues. API Design: Strong knowledge of RESTful API design and implementation; knowledge of GraphQL is a plus. Security Best Practices: Awareness of security best practices in software development. More ❯

development standards and best practices for the team Backend Development - Build and ship robust Java/Spring backend services and APIs, with occasional Angular or React work System Architecture - Design scalable solutions using our Kubernetes/Docker containerisation approach, NoSQL databases, and AWS services Cross Team Collaboration - Work closely with frontend developers and other teams, ensuring robust API design and system integration Engineering Excellence - Champion code quality through comprehensive reviews, automated testing, and CI/CD best practices across our GitLab pipelines Team Development - Mentor engineers at various experience levels, sharing knowledge across technologies and helping develop technical decision making skills Innovation & Research - Contribute to our Agent AI initiatives, exploring new approaches to process optimisation and … Spring framework, with experience building scalable, maintainable applications and RESTful APIs; comfortable with Node.js tooling and build processes Frontend Familiarity - Understanding of frontend technologies (Angular/React) to support API design and assist with frontend work when needed Infrastructure & DevOps - Hands on experience with containerisation (Docker/Kubernetes), cloud platforms (preferably AWS), and CI/CD pipeline configuration More ❯

AI Engineer to build and scale cutting-edge AI capabilities that drive smarter decisions and greater efficiency across Chambers and Partners. In this brand new role, role, you’ll design and implement intelligent systems that enhance how we use data, streamline operations, and power innovation across our digital platforms. You’ll play a key role in establishing the technical … deliver value to our users. Main Duties and Responsibilities Data & Retrieval Build robust ingestion pipelines for PDFs/Word/Excel/Audio/JSON and semi-structured sources. Design RAG systems: chunking strategies, document schemas, metadata, hybrid/dense retrieval, re-ranking, and grounding. Manage vector/keyword indexes (e.g., Azure AI Search, pgvector, Pinecone/Weaviate). … NLP, information retrieval, and recommendation systems that enhance Chambers and Partners’ research and product offerings, including document understanding, automatic summarisation, topic modelling, semantic search, entity recognition, and relationship extraction. Design and implement intelligent tagging and metadata enrichment frameworks to categorize and organize legal and market data, improving search, discoverability, and insight accuracy. LLM & Machine Learning Application Engineering Design More ❯

Overview: We are seeking a technically proficient Data Analyst to join our IT Department. This role will focus on API design and systems integrations , playing a vital part in enabling data-driven decision-making and ensuring seamless data exchange across internal and external platforms. Key Responsibilities: Design, document, and maintain APIs to facilitate secure and efficient data … BI, Azure Foundry, and Fabric . Ensure data quality, compliance, and governance across all integrations. Support automation efforts by embedding APIs into existing workflows. Work closely with vendors to design solutions aligned with architectural standards and best practices. Key Skills & Experience: Proven experience in a Data Analyst or similar technical role. Strong hands-on experience with RESTful API design , documentation (Swagger/OpenAPI), and testing tools (e.g. Postman). Proficiency in SQL and scripting languages such as Python or R . Solid understanding of data modelling, ETL processes , and system integration . Experience working with Azure and Microsoft data tools including Power BI , Azure Foundry , and Fabric . Excellent communication skills and ability to engage effectively More ❯

responsibilities Build, deploy, and monitor solutions using AWS services (Lambda, APIGateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) Integrate APIs into CI/CD pipelines using Azure DevOps, Github workflows Design, deploy, and manage applications tailored to business needs, whilecustomizing platforms and overseeing the full API lifecycle using Apigee Edge and X.Drive API strategy execution, provide technical support … integrations and documentation. Key skills for this role Security & Compliance:o Implement and enforce security best practices across the platform, includingsecure coding, dependency management, and vulnerability scanning.o Ensure API security and access control using OAuth, API keys, JWT, and othermechanisms.o Monitor and remediate security vulnerabilities in third-party packages andlibraries.o Collaborate with security teams to align platform … Automate upgrade workflows using CI/CD pipelines and infrastructure-as-code tools. Infrastructure & DevOps:o Hands-on experience with Terraform and Ansible for infrastructureprovisioning and configuration management.o Design and manage Azure DevOps CI/CD pipelines for secure and efficientsoftware delivery.o Deploy microservices using AWS ECS, ECR, and Fargate, ensuring secure andscalable architecture. Development & Containerization:o More ❯

deployment. Manage infrastructure, monitor performance,and collaborate across teams to maintain scalable, secure, and resilient systems. Key role and responsibilities Build, deploy, and monitor solutions using AWS services (Lambda, API Gateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) Integrate APIs into CI/CD pipelines using Azure DevOps, Github workflows Design, deploy, and manage applications tailored to business needs … while customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. Drive API strategy execution, provide technical support, and generate insights through analytics to enhance integrations and documentation. Key skills for this role Hands-on experience with infrastructure-as-code tools (e.g. Terraform, Ansible) is a must Proficiency with AWS cloud tools and architecture, including … based web applications Strong analytical and problem-solving skills Good knowledge of the Apigee platform or any APIM platform and its components Ability to generate custom analytics reports for API consumption and errors Implementation of API security and access control (OAuth, API keys, JWT, etc.) Familiarity with API design patterns, best practices, and performance optimization More ❯

award winning B2B SaaS platform that is entering the Belfast market with ambitious plans to scale our team rapidly, with over 100 hires planned through 2026. Primary Job Responsibilities Design & build future proof solutions to support growing business needs while thoroughly considering the system impact Mentor and lead our engineers to develop solutions from idea to implementation by estimating … of developing in C#, Java or other OO programming languages Minimum 7+ years of hands on experience programming on the .NET platform using C#, including ASP.NET (MVC) Expertise with Design Patterns, refactoring, OO Design and related areas Experience in Web API design principles and best practices Comfortable with database design and development Hands on experience More ❯

to manage infrastructure, monitor performance, and collaborate across teams to maintain scalable, secure, and resilient systems. Key role and responsibilities Build, deploy, and monitor solutions using AWS services (Lambda, API Gateway, CloudWatch, ECS, ECR, Dynamo, S3 etc.) Integrate APIs into CI/CD pipelines using Azure DevOps, Github workflows Lead and execute migration projects from Apigee Edge to Apigee … X, ensuring minimal disruption and optimal performance Design, deploy, and manage applications tailored to business needs, while customizing platforms and overseeing the full API lifecycle using Apigee Edge and X. Drive API strategy execution, provide technical support, and generate insights through analytics to enhance integrations and documentation. Key skills for this role Security Cleared or SC Eligible … including Executive Directors. This includes economic considerations for the product roadmap. Extensive experience with Google Apigee, including migration from Edge to X Ability to generate custom analytics reports for API consumption and errors Hands-on experience with infrastructure-as-code tools (e.g. Terraform, Ansible) is a must Proficiency with AWS cloud tools and architecture , including deploying microservices using ECS More ❯

of Cloud Engineering Are you ready to lead the next wave of cloud innovation? Join our Cloud Native Engineering Lab as a Senior Cloud Platform Engineer and help us design, build, and operate secure, automated cloud platforms that empower product teams to deliver API-first services at pace and with confidence. Responsibilities Engineering Leadership: Be a hands-on … leader, balancing deep technical work with mentoring and coaching to raise the bar on reliability, security, and simplicity. Platform Development: Design, build, and operate cloud platform capabilities using Infrastructure-as-Code (Terraform) and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker). Security & Reliability: Embed secure-by-design principles from architecture to runtime, safeguarding … colleagues and customers. Performance & Automation: Define and operate against SLOs/SLIs, implement actionable observability, performance tuning, and automation to reduce toil. API-First Enablement: Enable API-first delivery with reusable patterns and golden paths for API producers and consumers. Community & Mentorship: Mentor engineers, contribute to communities of practice, and uphold Platform Engineering standards. Qualifications Proven experience More ❯

SoftwareDeveloper(API Development/Backend Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid 1 day onsite a week) 55k + Benefits Were partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. Theyre looking for a Software Engineer with strong API and backend development experience to work on complex, high-performing systems used by … and developing robust APIs that power enterprise software products. Youll work primarily with Node.js and C#, collaborating with cross-functional teams to deliver well-architected, maintainable solutions. Key Responsibilities Design, build, and maintain RESTful APIs and backend systems. Develop high-quality, scalable code using Node.js and C#. Collaborate with product and engineering teams to define technical solutions. Ensure best … CD. Optimise performance, security, and maintainability of backend services. Support occasional front-end integration using React (desirable, not essential). Skills & Experience 4+ years commercial experience in backend/API development. Strong expertise in Node.js and C#. Solid understanding of REST API design and implementation. Experience with cloud computing and CI/CD pipelines. Knowledge of automated More ❯

POWWR are looking for an experienced Technical Lead to join our UK engineering team and help drive the design, development, and delivery of POWWR’s SaaS energy marketplace platform. In this hands-on leadership role, you’ll guide a team of engineers spanning front-end, back-end, and data disciplines, ensuring architectural integrity, engineering excellence, and continuous improvement. You … ensuring scalability, maintainability, and alignment with POWWR’s platform strategy and product vision. Lead the development of high-performance web applications using Angular, .NET, and Azure services. Oversee the design and evolution of robust API layers (GraphQL and REST), ensuring consistency, discoverability, and strong contract boundaries across services. Champion DevOps culture by embedding CI/CD pipelines, automation … team development. Drive engineering quality through code reviews, automated testing, and test-driven development (TDD) . Contribute to cross-team technical initiatives such as shared libraries, security standards, and design system evolution. Participate in agile planning, sprint reviews, and retrospectives , fostering collaboration and accountability. Ensure compliance with ISO 27001 , security best practices, and regulatory standards (e.g., GDPR). Contribute More ❯

ll join a high-performing cloud team supporting enterprise clients in designing and delivering secure, scalable integrations on AWS. You'll work across modern architectures, leveraging containerisation, event-driven design, and API-first principles to solve complex integration challenges. Key Responsibilities Architect and implement AWS integrations using EKS (Kubernetes) and Lambda . Design and manage secure REST …/GraphQL APIs via API Gateway , including authentication, throttling, and schema validation. Integrate with enterprise platforms such as SAP, Salesforce, Oracle ERP for both batch and real-time data flows. Build event-driven messaging architectures using SQS, SNS , and Step Functions . Apply best practices in Kubernetes and API security , including TLS, KMS, RBAC , and service-to-service … X-Ray , and container-level logging and alerting tools. What We're Looking For 5+ years of AWS integration experience, including secure deployments on Lambda and EKS . Strong API design and security expertise (OpenAPI, OAuth2, JWT). Proven integration experience with SAP, Salesforce, Oracle . Proficiency in Flask, FastAPI , or similar frameworks in cloud-native environments. Experience More ❯

and product owners to deliver reliable, production-grade systems. This is a 6-month contract role based in Leeds, UK , with a strong possibility of extension . Key Responsibilities: Design, develop, and deploy scalable backend microservices using Java 17 and Spring Boot . Configure and maintain DevOps pipelines on Google Cloud Platform (GCP) to support the credit decisioning engine. … and microservices architecture . Java 17: Hands-on experience is mandatory . DevOps & Cloud: Proven experience with GCP , AWS , or Azure , and familiarity with CI/CD pipelines . API Development: Expertise in RESTful API design and development. Frontend: Working knowledge of ReactJS or Angular . Testing: Strong background in automated testing , including JUnit . Mindset: Excellent More ❯

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. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

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. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

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. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

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. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

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. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

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. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

different stages of the Software Development Life Cycle including Requirements Elicitation, Application Architecture definition and Design. You will play an important role in creating the Architecture and high level design artifacts. You will also do technical feasibility and identify smart ways of completing client’s requirement. You will guide the team technically and work closely with offshore team acting … and collaboration are encouraged, excellence is rewarded, and diversity is respected and valued. Responsibilities • Define architecture and technical standards for Angular-based web applications and related component libraries. • Architect, design and review .NET Core microservices (API design, messaging, resiliency, CI/CD) deployed to Azure (App Services, Containerization, Functions, Service Bus, Cosmos/SQL, APIM). • Specify … native mobile app architecture patterns and guidelines for SwiftUI (iOS) and Jetpack Compose (Android), including shared data, offline sync, feature flagging, and CI pipelines. • Own and evolve the design system: components, tokens, theming, versioning, and cross-platform implementation patterns. • Ensure WCAG 2.2 accessibility compliance across web and mobile UIs; define test strategies and automated checks. • Drive browser performance strategy More ❯

Solutions Architect - Data Platforms & API Migration Location: Manchester (Hybrid) Salary £80,000 - £90,000 DOE About the Opportunity A trailblazer in the legal sector is seeking a Solutions Architect with a specialist focus on legacy systems transformation, API-centric design, and enterprise-scale data platform migration. The company is recognised for embracing cutting-edge technology and innovation … Develop a technically robust engineering roadmap for migration and integration from on-premises/legacy platforms to cloud-based solutions, ensuring APIs and data flows are optimised. Target Architecture Design: Create scalable, resilient and secure architecture blueprints for a future-state data and applications landscape using SaaS, microservices, and APIs. Integration & Migration: Lead integration strategy and data migration efforts … with technical and business leaders to ensure all roadmaps support strategic business goals. Required Experience Significant expertise in software, solutions, or application architecture, including large-scale legacy migrations and API solutions. Prior experience within professional or legal services, or highly regulated environments. Proven track record delivering portfolio rationalisation and IT modernisation projects in complex organisations. Strong hands-on experience More ❯

Solutions Architect - Data Platforms & API Migration Location: Manchester (Hybrid) Salary £80,000 - £90,000 DOE About the Opportunity A trailblazer in the legal sector is seeking a Solutions Architect with a specialist focus on legacy systems transformation, API-centric design, and enterprise-scale data platform migration. The company is recognised for embracing cutting-edge technology and innovation … Develop a technically robust engineering roadmap for migration and integration from on-premises/legacy platforms to cloud-based solutions, ensuring APIs and data flows are optimised. Target Architecture Design: Create scalable, resilient and secure architecture blueprints for a future-state data and applications landscape using SaaS, microservices, and APIs. Integration & Migration: Lead integration strategy and data migration efforts … with technical and business leaders to ensure all roadmaps support strategic business goals. Required Experience Significant expertise in software, solutions, or application architecture, including large-scale legacy migrations and API solutions. Prior experience within professional or legal services, or highly regulated environments. Proven track record delivering portfolio rationalisation and IT modernisation projects in complex organisations. Strong hands-on experience More ❯