1 to 25 of 44 Permanent API Design Jobs in the City of London

between development and operations by automating workflows, optimizing CI/CD pipelines, and ensuring reliable, scalable, and secure software delivery. This role requires a deep understanding of cloud infrastructure, API management, and continuous integration and deployment practices. Candidate should be SC Cleared/SC Eligible Responsibilities Build, deploy, and monitor solutions using AWS services such as Lambda, API Gateway, CloudWatch, ECS, ECR, DynamoDB, and S3. Integrate APIs into CI/CD pipelines using Azure DevOps and GitHub workflows. Design, develop, and manage applications tailored to business requirements. Execute and manage the end-to-end application lifecycle using Apigee Edge and X-API strategy. Perform API strategy execution, provide technical support, and generate insights through … pipelines. Solid understanding of build and deployment methodologies for distributed systems. Experience with enterprise-grade web applications and system integration. Strong knowledge of the Apigee platform or any APM (API Management) platform and its components. Ability to generate custom analytical reports for API consumption and error tracking. Familiarity with API security and access control mechanisms (OAuth, API More ❯

between development and operations by automating workflows, optimizing CI/CD pipelines, and ensuring reliable, scalable, and secure software delivery. This role requires a deep understanding of cloud infrastructure, API management, and continuous integration and deployment practices. Candidate should be SC Cleared/SC Eligible Responsibilities Build, deploy, and monitor solutions using AWS services such as Lambda, API Gateway, CloudWatch, ECS, ECR, DynamoDB, and S3. Integrate APIs into CI/CD pipelines using Azure DevOps and GitHub workflows. Design, develop, and manage applications tailored to business requirements. Execute and manage the end-to-end application lifecycle using Apigee Edge and X-API strategy. Perform API strategy execution, provide technical support, and generate insights through … pipelines. Solid understanding of build and deployment methodologies for distributed systems. Experience with enterprise-grade web applications and system integration. Strong knowledge of the Apigee platform or any APM (API Management) platform and its components. Ability to generate custom analytical reports for API consumption and error tracking. Familiarity with API security and access control mechanisms (OAuth, API More ❯

professional services organisation is looking for a technically proficient Data Analyst to join the IT Department within the Strategy & Architecture Team. This role will have a strong focus on API design and integrations between systems. This role is critical in enabling data-driven decision-making and ensuring seamless data exchange across internal systems and external platforms. Key Responsibilities … Analyse and interpret complex datasets to support IT operations and strategic initiatives. Design, document, and maintain APIs that facilitate secure and efficient integration of data between systems. Create data dictionaries that describe data structures, elements, their meanings, and relationships within a dataset or database. Create Business Glossary and describe business terms, and their definitions, ensuring they are consistent across … fields. Essential Requirements Demonstrated experience in data analysis within an IT or technical environment. Strong proficiency in SQL and scripting languages including Python or R. Practical experience with RESTful API design, documentation (e.g. Swagger/OpenAPI), and testing tools (e.g. Postman). Working knowledge of cloud platforms (primarily Azure) and associated data services. Strong understanding of data modelling More ❯

professional services organisation is looking for a technically proficient Data Analyst to join the IT Department within the Strategy & Architecture Team. This role will have a strong focus on API design and integrations between systems. This role is critical in enabling data-driven decision-making and ensuring seamless data exchange across internal systems and external platforms. Key Responsibilities … Analyse and interpret complex datasets to support IT operations and strategic initiatives. Design, document, and maintain APIs that facilitate secure and efficient integration of data between systems. Create data dictionaries that describe data structures, elements, their meanings, and relationships within a dataset or database. Create Business Glossary and describe business terms, and their definitions, ensuring they are consistent across … fields. Essential Requirements Demonstrated experience in data analysis within an IT or technical environment. Strong proficiency in SQL and scripting languages including Python or R. Practical experience with RESTful API design, documentation (e.g. Swagger/OpenAPI), and testing tools (e.g. Postman). Working knowledge of cloud platforms (primarily Azure) and associated data services. Strong understanding of data modelling 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 ❯

in London Security Clearance: Active SC The Data Architect will have the following responsibilities: Collaborate with business and technology stakeholders to translate business problems into scalable data architecture solutions. Design, document, and maintain enterprise and solution-level data architectures across multiple platforms and domains. Define and enforce data standards, principles, and governance frameworks to ensure consistency and quality. Develop … and physical data models aligned with business needs and organisational strategy. Select appropriate data storage, integration, and processing technologies for each project’s context. Evaluate emerging tools, technologies, and design patterns to recommend optimal solutions. Guide the design and implementation of data platforms using cloud and hybrid environments (e.g. Azure, AWS). Oversee the design of data … pipelines, APIs, and services to ensure efficient data flow and interoperability. Collaborate with Data Engineers and Developers to ensure alignment between architectural design and technical implementation. Ensure compliance with security, privacy, and data protection requirements. Provide technical input into proposals, bids, and solution designs. Act as a trusted advisor to clients, communicating technical concepts clearly to non-technical audiences. More ❯

in London Security Clearance: Active SC The Data Architect will have the following responsibilities: Collaborate with business and technology stakeholders to translate business problems into scalable data architecture solutions. Design, document, and maintain enterprise and solution-level data architectures across multiple platforms and domains. Define and enforce data standards, principles, and governance frameworks to ensure consistency and quality. Develop … and physical data models aligned with business needs and organisational strategy. Select appropriate data storage, integration, and processing technologies for each project’s context. Evaluate emerging tools, technologies, and design patterns to recommend optimal solutions. Guide the design and implementation of data platforms using cloud and hybrid environments (e.g. Azure, AWS). Oversee the design of data … pipelines, APIs, and services to ensure efficient data flow and interoperability. Collaborate with Data Engineers and Developers to ensure alignment between architectural design and technical implementation. Ensure compliance with security, privacy, and data protection requirements. Provide technical input into proposals, bids, and solution designs. Act as a trusted advisor to clients, communicating technical concepts clearly to non-technical audiences. More ❯

in power, gas, and oil markets: Ideally you will have 10+ years development experience) with a track record of delivering robust enterprise-wide solutions using industry standard practices Modern design principles. i.e. able to take initial design direction and interpret those guidelines to finalize the design through to a solution and experience of working in an Agile …/Scrum team environment In-depth knowledge of Openlink Endur (versions V19-V23 preferred), as well as API design and development fundamentals and with API testing using tools such as Swagger Good SQL/Sybase skills; building modern applications with C# Strong hands-on development experience with: AVS, OpenJVS, Open Components, Java, SQL, C#, Python Connex Gateways More ❯

in power, gas, and oil markets: Ideally you will have 10+ years development experience) with a track record of delivering robust enterprise-wide solutions using industry standard practices Modern design principles. i.e. able to take initial design direction and interpret those guidelines to finalize the design through to a solution and experience of working in an Agile …/Scrum team environment In-depth knowledge of Openlink Endur (versions V19-V23 preferred), as well as API design and development fundamentals and with API testing using tools such as Swagger Good SQL/Sybase skills; building modern applications with C# Strong hands-on development experience with: AVS, OpenJVS, Open Components, Java, SQL, C#, Python Connex Gateways 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 ❯

Full Stack Engineer/Technical Lead We are looking for multiple (Mid-Senior-Lead) Full Stack/Back End Engineers to join our high-calibre engineering team. You will design, build, and maintain the core services and APIs that power our proprietary platform, with opportunities to contribute to both back-end and front-end codebases, and explore AI & LLMs … help drive the next evolution of our platform, designing architecture, managing engineers and shaping how we integrate AI and large language models into our products and workflows. You will design, implement, and maintain scalable back-end services and APIs (primarily in Go, with Python for scripting and data). You lead by example, build fast and help shape our … technical roadmap. As a mid-senior software engineer, you will take full lifecycle ownership of end-to-end delivery — from technical design and implementation through to testing, deployment, and monitoring. Contribute to front-end code (VueJS) as needed, supporting a collaborative, full stack environment. Work with relational databases (Postgres) and NoSQL solutions (e.g., MongoDB, Redis). Participate in architectural More ❯

Full Stack Engineer/Technical Lead We are looking for multiple (Mid-Senior-Lead) Full Stack/Back End Engineers to join our high-calibre engineering team. You will design, build, and maintain the core services and APIs that power our proprietary platform, with opportunities to contribute to both back-end and front-end codebases, and explore AI & LLMs … help drive the next evolution of our platform, designing architecture, managing engineers and shaping how we integrate AI and large language models into our products and workflows. You will design, implement, and maintain scalable back-end services and APIs (primarily in Go, with Python for scripting and data). You lead by example, build fast and help shape our … technical roadmap. As a mid-senior software engineer, you will take full lifecycle ownership of end-to-end delivery — from technical design and implementation through to testing, deployment, and monitoring. Contribute to front-end code (VueJS) as needed, supporting a collaborative, full stack environment. Work with relational databases (Postgres) and NoSQL solutions (e.g., MongoDB, Redis). Participate in architectural More ❯

generation Unified Client Experience (UCX) frontend that will streamline client journeys across a range of products and services, in both web and mobile domains. It's an opportunity to design, architect and build a modern frontend using latest technologies and best practices to transform our savings and investment platform. The UCX team consolidates the efforts of the whole organisation … scale, regulated environments - ideally in Investment, Asset or Wealth Management. Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable More ❯

including: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Python (Django, Flask, or FastAPI) PostgreSQL Experience with building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. Hands-on experience with cloud platforms (AWS, Azure, or GCP). Excellent communication skills, capable of motivating and aligning technical teams. Desirable: Experience with AI tools, APIs, ML More ❯

reflects the great diversity of our real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling the tech team. Ship … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design, and modern JavaScript/TypeScript Cloud infrastructure knowledge including AWS … and opportunity. Expert in solving deep technical problems with customer outcomes top of mind. Ability to evaluate and make decisions based on a balanced assessment of key factors, including design, scalability, performance, technical debt and cost efficiency. Working highly collaboratively in a team environment. What We Offer Professional Impact & Growth Build a high-impact platform from emerging MVP to More ❯

reflects the great diversity of our real customers and users across the world. What You’ll Do Own our engineering stack from MVP to scale — backend, frontend, infra . Design architecture, choose tools, and set engineering standards. Work directly with early users to iterate quickly. Collaborate with the founding team on strategy, hiring, and scaling the tech team. Ship … high-quality, user-focused features (that change Oceans and planet) fast. What We’re Looking For 5+ years of backend expertise in Go including API design, microservices architecture, gRPC/REST services, and database design (PostgreSQL, Redis). Frontend proficiency with React/Next.js, responsive design, and modern JavaScript/TypeScript Cloud infrastructure knowledge including AWS … and opportunity. Expert in solving deep technical problems with customer outcomes top of mind. Ability to evaluate and make decisions based on a balanced assessment of key factors, including design, scalability, performance, technical debt and cost efficiency. Working highly collaboratively in a team environment. What We Offer Professional Impact & Growth Build a high-impact platform from emerging MVP to More ❯

C#/.NET Core/.NET 6+ Proven experience designing and building distributed, microservices-based systems Deep understanding of AWS (ECS, Lambda, EventBridge, DynamoDB, S3, etc.) Strong background in API design, asynchronous/event-driven architectures, and system scalability Expertise with CI/CD pipelines and modern DevOps tooling (GitHub Actions, TeamCity, Jenkins, or Azure DevOps) Strong leadership … continuous improvement Nice to Have Experience leading or scaling engineering teams within a SaaS or cloud-first environment Hands-on experience with Docker and Kubernetes Familiarity with Domain-Driven Design (DDD) and CQRS patterns Exposure to serverless architectures and event streaming (Kafka, SNS/SQS, etc.) What’s on Offer Salary up to £120,000 (DOE) + annual bonus More ❯

C#/.NET Core/.NET 6+ Proven experience designing and building distributed, microservices-based systems Deep understanding of AWS (ECS, Lambda, EventBridge, DynamoDB, S3, etc.) Strong background in API design, asynchronous/event-driven architectures, and system scalability Expertise with CI/CD pipelines and modern DevOps tooling (GitHub Actions, TeamCity, Jenkins, or Azure DevOps) Strong leadership … continuous improvement Nice to Have Experience leading or scaling engineering teams within a SaaS or cloud-first environment Hands-on experience with Docker and Kubernetes Familiarity with Domain-Driven Design (DDD) and CQRS patterns Exposure to serverless architectures and event streaming (Kafka, SNS/SQS, etc.) What’s on Offer Salary up to £120,000 (DOE) + annual bonus More ❯

the go-to technical voice for engineering and delivery, shaping how apps, services, and systems come together. It’s a varied role that mixes hands-on coding with architectural design and technical leadership. You’ll design and build modern environments, integrate multiple SaaS platforms, and help set the standards for how things are done across the organisation. You … cloud architecture • Infrastructure as code using Terraform and CloudFormation • Docker and Kubernetes • Automation and CI/CD pipelines • GitHub and GitHub Actions Software and Frameworks • React, Node, Next.js, Python • API design and integration • RESTful services and automation Data and Platforms • Salesforce • Google Workspace • Atlassian tools such as Jira and Confluence • Databases including DynamoDB, MongoDB, and RDS Security and … best practice You’ll bring a broad technical background, strong problem-solving ability, and the confidence to define the right approach. If you enjoy combining coding, cloud engineering, and design thinking, and want a role with purpose, autonomy, and impact, then this is for you. More ❯

the go-to technical voice for engineering and delivery, shaping how apps, services, and systems come together. It’s a varied role that mixes hands-on coding with architectural design and technical leadership. You’ll design and build modern environments, integrate multiple SaaS platforms, and help set the standards for how things are done across the organisation. You … cloud architecture • Infrastructure as code using Terraform and CloudFormation • Docker and Kubernetes • Automation and CI/CD pipelines • GitHub and GitHub Actions Software and Frameworks • React, Node, Next.js, Python • API design and integration • RESTful services and automation Data and Platforms • Salesforce • Google Workspace • Atlassian tools such as Jira and Confluence • Databases including DynamoDB, MongoDB, and RDS Security and … best practice You’ll bring a broad technical background, strong problem-solving ability, and the confidence to define the right approach. If you enjoy combining coding, cloud engineering, and design thinking, and want a role with purpose, autonomy, and impact, then this is for you. More ❯

generation Unified Client Experience (UCX) frontend that will streamline client journeys across a range of products and services, in both web and mobile domains. It's an opportunity to design, architect and build a modern frontend using latest technologies and best practices to transform our savings and investment platform. The UCX team consolidates the efforts of the whole organisation … scale, regulated environments - ideally in Investment, Asset or Wealth Management. Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable More ❯

generation Unified Client Experience (UCX) frontend that will streamline client journeys across a range of products and services, in both web and mobile domains. It's an opportunity to design, architect and build a modern frontend using latest technologies and best practices to transform our savings and investment platform. The UCX team consolidates the efforts of the whole organisation … scale, regulated environments - ideally in Investment, Asset or Wealth Management. Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services. Experience in Java and Spring Boot, or iOS (Swift) or Android (Kotlin) along with exposure to Figma and Vercel is a big plus. Capable More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ML systems for business intelligence. Build robust APIs, microservices, and data pipelines to power intelligent, data-driven tools. Develop retrieval-augmented generation … in Python plus at least one other backend language (TypeScript or Java preferred). Proven experience with AWS , containerisation, and infrastructure as code (Terraform, Docker). Solid understanding of API design, data modelling, and microservice architecture. Excellent communication skills, with the ability to translate technical outcomes into business impact. Tech Environment Languages: Python, TypeScript, Java AI/LLM More ❯

the Software Engineering group. In addition to contributing to feature development, you will play a role in shaping the technology and process strategies, and occasionally lead innovation or software design initiatives. Key Responsibilities: Develop new features with a strong focus on high-quality code. Conduct peer code reviews to ensure quality and adherence to best practices. Participate in daily … organization's objectives. Work closely with tech leads, engineers, testers, and other personnel to deliver high-quality products. Take ownership of initiatives related to innovation or addressing technical debt. Design, document, and communicate system solutions with a balanced focus on time, quality, cost, and performance. Collaborate with colleagues across the organization to gain buy-in and feedback on proposals … Required Knowledge & Experience: Essential: Strong proficiency in C# at a commercial level. Solid experience with .NET Core and related open-source technologies. Knowledge of Object Orientation, SOA, and relevant design patterns. Experience with modern software development practices, including agile methodologies , version control, code reviews, and continuous integration. Understanding of concurrency, asynchrony, and parallelism. Experience with Test Driven Development (TDD More ❯