1 to 25 of 53 API Design Jobs in the South East

The Role As a Founding Backend Engineer, you'll be instrumental in shaping our technical infrastructure from the ground up. You'll take ownership of our existing product and design, build, and maintain the systems that power our next phase of growth, ensuring our platform is robust, secure, and scalable. This is a unique opportunity to make a significant … tools like Terraform to programmatically manage cloud resources. CI/CD Pipeline Management : Some experience setting up and maintaining automated testing and deployment workflows using GitHub Actions. Development and API Design Scaling Applications : Previous success scaling applications to handle growing user bases and increasing traffic loads. API Design : Strong knowledge of RESTful API design More ❯

The Role As a Founding Backend Engineer, you'll be instrumental in shaping our technical infrastructure from the ground up. You'll take ownership of our existing product and design, build, and maintain the systems that power our next phase of growth, ensuring our platform is robust, secure, and scalable. This is a unique opportunity to make a significant … tools like Terraform to programmatically manage cloud resources. CI/CD Pipeline Management : Some experience setting up and maintaining automated testing and deployment workflows using GitHub Actions. Development and API Design Scaling Applications : Previous success scaling applications to handle growing user bases and increasing traffic loads. API Design : Strong knowledge of RESTful API design More ❯

establishing engineering best practices. You'll have the opportunity to make key architectural decisions and drive the technical vision for our product as we scale. Key Responsibilities: - Lead the design and development of complex features across our Next.js frontend and FastAPI backend - Architect scalable solutions at the forefront of robotics, AI, and web development - Manage and mentor a technical … team, providing code reviews, technical guidance, and career development support - Define and implement engineering standards, coding practices, and development workflows - Collaborate closely with product and design teams to translate requirements into technical specifications and delivery plans - Make key technical decisions regarding system architecture, technology choices, and infrastructure strategy - Drive technical initiatives from conception through delivery, ensuring quality and timely … technical projects or managing development teams - Deep expertise in React and Next.js with demonstrated ability to architect complex frontend applications - Strong backend development experience with Python and FastAPI, including API design at scale - Proven track record of making sound architectural decisions and technical trade-offs - Experience establishing engineering best practices, code quality standards, and team workflows - Strong understanding More ❯

establishing engineering best practices. You'll have the opportunity to make key architectural decisions and drive the technical vision for our product as we scale. Key Responsibilities: - Lead the design and development of complex features across our Next.js frontend and FastAPI backend - Architect scalable solutions at the forefront of robotics, AI, and web development - Manage and mentor a technical … team, providing code reviews, technical guidance, and career development support - Define and implement engineering standards, coding practices, and development workflows - Collaborate closely with product and design teams to translate requirements into technical specifications and delivery plans - Make key technical decisions regarding system architecture, technology choices, and infrastructure strategy - Drive technical initiatives from conception through delivery, ensuring quality and timely … technical projects or managing development teams - Deep expertise in React and Next.js with demonstrated ability to architect complex frontend applications - Strong backend development experience with Python and FastAPI, including API design at scale - Proven track record of making sound architectural decisions and technical trade-offs - Experience establishing engineering best practices, code quality standards, and team workflows - Strong understanding More ❯

Halian Technology are searching for an Interim API Integrations Specialist to join our client's forward-thinking technology team. Our client is a dynamic and rapidly growing energy supplier based in Oxfordshire, committed to driving business success through smart, reliable energy solutions. Our client challenges the existing marketplace with a tech-driven, customer-focused approach and foster a culture … designing cutting-edge integrations, delivering high-quality solutions, and want to work in a company where your expertise is valued and supportedthis is the role for you. Key Responsibilities: Design, develop, and maintain API integrations between internal systems and external SaaS platforms. Collaborate with product, data, and engineering teams to identify integration requirements and deliver robust solutions. Monitor … and troubleshoot integration workflows, ensuring data consistency across platforms. Translate business requirements into technical specifications for system connectivity. Build and maintain API documentation, providing guidance on integration best practices. Ensure all integrations meet compliance, security, and performance standards. Work closely with SaaS vendors and partners to coordinate technical efforts. Key Requirements: Essential: Strong expertise in digital engineering, CMS 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 ❯

sectors. Key Responsibilities: Full stack developer with around 8-10 years development experience, working in a agile development team to deliver robust enterprise-wide solutions utilising industry standard practices Design, develop, enhance and maintain applications using agreed coding standards and quality targets. Ensure quality via code reviews and thorough unit testing. Liaise with immediate scrum team, other scrum/… Experience and expertise with the following technical stack Angular 13+ with DevExtreme UI library desirable Playwright, ReadyAPI and Specflow. Jira, Github, Confluenc Nice to have - C# and .NET6+ Rest API's and Microservice architecture SQL Server Database, NHibernate or Entity Framework Demonstrate expertise of: Building modern-web applications Modern UI design principles. i.e. Able to take initial design direction and interpret those guidelines to finalise the design through to a solution Restful API Design and development fundamentals Good SQL knowledge Test case preparation and execution EDUCATION & EXPERIENCE REQUIREMENTS 8-10 years' experience designing and developing applications both individually and as part of a team Familiarity with energy or financial trading environment Strong inter-personal 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 ❯

up-within a startup-style 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 TypeScript and modern frameworks (e.g. … development productivity and platform capabilities. 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 of emerging technologies and industry … Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimisation, and maintenance. AI Development Tools such as Windsurf, Aider or Augment. Demonstrable experience building and scaling SaaS platforms in a production environment. Strong understanding and practical application of More ❯

Each Other The Role We are seeking a Full Stack Software Engineer with a strong focus on Java to join our growing engineering team. In this role, you’ll design, build, and maintain robust and scalable full-stack applications that power our automation and SaaS platforms. You’ll collaborate closely with product managers, designers, and fellow engineers to deliver … high-impact solutions that make automation smarter, faster, and more reliable. What You’ll Do Design, develop, and implement highly performant full-stack applications using Java and related technologies. Build and maintain scalable back-end services, APIs, and microservices. Develop responsive, intuitive front-end interfaces with modern frameworks. Translate product requirements into technical specifications. Participate in the full SDLC … planning, design, coding, testing, deployment, and support. Write clean, maintainable, well-documented code following best practices. Implement automated tests (unit, integration, and end-to-end) to ensure quality. Troubleshoot, debug, and resolve software defects and production issues. Contribute to architectural discussions to ensure scalability, security, and performance. Mentor junior engineers and foster a culture of continuous improvement. What You More ❯

Each Other The Role We are seeking a Full Stack Software Engineer with a strong focus on Java to join our growing engineering team. In this role, you’ll design, build, and maintain robust and scalable full-stack applications that power our automation and SaaS platforms. You’ll collaborate closely with product managers, designers, and fellow engineers to deliver … high-impact solutions that make automation smarter, faster, and more reliable. What You’ll Do Design, develop, and implement highly performant full-stack applications using Java and related technologies. Build and maintain scalable back-end services, APIs, and microservices. Develop responsive, intuitive front-end interfaces with modern frameworks. Translate product requirements into technical specifications. Participate in the full SDLC … planning, design, coding, testing, deployment, and support. Write clean, maintainable, well-documented code following best practices. Implement automated tests (unit, integration, and end-to-end) to ensure quality. Troubleshoot, debug, and resolve software defects and production issues. Contribute to architectural discussions to ensure scalability, security, and performance. Mentor junior engineers and foster a culture of continuous improvement. What You More ❯

Back End Developer The Company Working for a business that brings content creators and investment together... You’ll help to design new, and support existing, integration processes while maintaining a principle of continuous improvement. You’ll use your knowledge of Azure to lead the development of web applications and platform elements and improve the performance and quality of existing … solutions. You'll use your communication skills to effectively collaborate with fellow team members to coordinate workload and ensure timely completion. The Role Design, develop, and maintain RESTful APIs and microservices to support platform functionality Build and optimise database schemas, queries, and data models for performance and scalability Implement secure authentication and authorization mechanisms including OAuth2 and SSO integrations … Experience 3-5 years of professional back-end development experience Strong proficiency in C# and .NET Core/ASP.NET Core Experience with Azure cloud services Solid understanding of RESTful API design principles and implementation Experience with SQL databases (Azure SQL, SQL Server) and T-SQL Knowledge of software design patterns and SOLID principles Experience with version control More ❯

our Forward Deployed Engineering Team. You will serve as the crucial link between our advanced AI agents and the wider enterprise technology landscape. Your primary responsibility will be to design, build, and manage the integrations that enable our Agentforce agents to take meaningful, autonomous actions across various business systems. You will not only connect agents to systems but also … in connecting disparate systems and are excited by the challenge of enabling AI to act upon its insights, this role is for you. Your Impact System & Agent Integration Architecture: Design and implement robust, scalable, and secure integration patterns that connect Agentforce to a wide range of enterprise applications and enable communication between different AI agents. Multi-Agent Orchestration: Design … agents. Agent-to-Agent Communication (A2A): Develop and implement protocols and standards for inter-agent communication, enabling different AI agents to collaborate, share information, and hand off tasks effectively. API Development and Management: Develop, deploy, and maintain custom APIs (REST, SOAP) to facilitate seamless data exchange and action execution between Agentforce and other systems. Workflow Automation: Collaborate with business More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

Fullstack Engineer, you will be pivotal in both frontend and backend development, crafting responsive, scalable web applications. This role requires strong expertise across the stack — from UI/UX design principles to backend integrations. You will design and implement APIs using JavaScript, TypeScript, and React, ensuring seamless performance and scalability. We’re looking for a proactive and experienced … and enjoys leading complex projects from conception to delivery. You’ll be both a technical leader and a driver of innovation across the team. Key Responsibilities Data Pipeline Architecture Design and implement robust, scalable data pipelines. Optimise data flow between databases (MySQL, MongoDB) and applications. Fullstack Development Develop high-quality, scalable applications using Node.js, TypeScript, and React. Collaborate with … frameworks and state management libraries like Redux or Context API. Hands-on experience with cloud services (AWS or GCP), particularly for deploying and managing applications0. Strong understanding of RESTful API design (GraphQL experience a plus). Analytical mindset with the ability to design, optimise, and troubleshoot complex UIs and fullstack integrations. Excellent communication and leadership skills with More ❯

looking for a Back End Developer who’s passionate about building scalable systems, optimising performance, and bringing great ideas to life through clean, reliable code. 💻 The Role You’ll design and maintain high-performance APIs, build data pipelines in Azure, and help evolve the backbone of our creator platform. What you’ll do: Design, develop, and maintain RESTful … efficient code. You have: 3–5 years of professional back-end development experience Strong C# and .NET Core/ASP.NET Core skills Experience with Azure cloud services Solid RESTful API design knowledge SQL expertise (T-SQL, optimisation, data modelling) Familiarity with Git and agile development (Bonus if you’ve worked with Docker, Kubernetes, Cosmos DB, or event-driven More ❯

looking for a Back End Developer who’s passionate about building scalable systems, optimising performance, and bringing great ideas to life through clean, reliable code. 💻 The Role You’ll design and maintain high-performance APIs, build data pipelines in Azure, and help evolve the backbone of our creator platform. What you’ll do: Design, develop, and maintain RESTful … efficient code. You have: 3–5 years of professional back-end development experience Strong C# and .NET Core/ASP.NET Core skills Experience with Azure cloud services Solid RESTful API design knowledge SQL expertise (T-SQL, optimisation, data modelling) Familiarity with Git and agile development (Bonus if you’ve worked with Docker, Kubernetes, Cosmos DB, or event-driven More ❯

website maintenance job and you’ll be building the logic, architecture, and integrations that power core customer solutions. The Role Working within a small specialist backend team, you’ll design, implement, and deliver PHP-based product features and custom solutions. You’ll be involved from requirements capture through to design, build, test, and deployment — with the autonomy to … architecture Occasionally creating supporting UIs for complex functionality What We’re Looking For Deep expertise in object-oriented programming and backend architecture Strong understanding of software engineering principles and design patterns API design, development, and integration experience HTML, CSS, JavaScript Solid database knowledge (MySQL preferred) Comfortable owning projects end-to-end Linux, SaaS platforms, CRM systems The More ❯

from home Role Overview A key client of ours in the media space are seeking an experienced Senior Full Stack Web Developer to play a key role in the design, development, and delivery of innovative, high-performance web applications. This position is central to the ongoing evolution of our programmatic and data-driven integration platforms, with a focus on … across multiple environments. This is an opportunity to work in a collaborative, fast-moving environment where technical expertise, creative problem-solving, and continuous improvement are highly valued. Key Accountabilities Design, develop, and maintain scalable and secure software applications aligned with architectural and business objectives. Partner with business, technical, and product leaders to deliver solutions that support the company's … strategic vision. Champion best practices in coding standards, testing, deployment, and DevOps automation. Contribute to a culture of innovation, collaboration, and continuous technical improvement. Key Responsibilities Lead the design and development of dynamic, responsive web applications using React.js , Node.js , and related technologies. Build and optimize PostgreSQL databases, including schema design, complex queries, and performance tuning. Implement and manage More ❯

Developer Southhampton - Hybrid (3 days in a week on-site) Salary: up to £50K per annum Full Stack Developer is required for the company that relentlessly focuses on technology, design, and customer outcomes, the company offers real opportunity for professionals who thrive in high-impact, evolutionary environments. Their innovative systems optimize energy efficiency and sustainability across sectors like laundry … manufacturing, and HVAC You will lead end-to-end development of scalable web applications using ReactJS, React Native, .NET, and Azure, including API design and IoT integrations. You will drive DevOps best practices with CI/CD, monitoring, and automated deployments and develop RESTful and GraphQL APIs, ensuring clean contracts for internal systems, third-party services, and IoT … devices. SKILLS: Fullstack expertise: .NET/C# and ReactJS. Cloud platforms (Azure preferred). REST/GraphQL API development. SQL/NoSQL or ADX databases. CI/CD and automated testing. Secure coding, OAuth2, Entra ID/B2C, RBAC. You'll join the company that focus on technology, design, and customer outcomes, the company offers real opportunity for More ❯

Developer Southhampton - Hybrid (3 days in a week on-site) Salary: up to £50K per annum Full Stack Developer is required for the company that relentlessly focuses on technology, design, and customer outcomes, the company offers real opportunity for professionals who thrive in high-impact, evolutionary environments. Their innovative systems optimize energy efficiency and sustainability across sectors like laundry … manufacturing, and HVAC You will lead end-to-end development of scalable web applications using ReactJS, React Native, .NET, and Azure, including API design and IoT integrations. You will drive DevOps best practices with CI/CD, monitoring, and automated deployments and develop RESTful and GraphQL APIs, ensuring clean contracts for internal systems, third-party services, and IoT … devices. SKILLS: Fullstack expertise: .NET/C# and ReactJS. Cloud platforms (Azure preferred). REST/GraphQL API development. SQL/NoSQL or ADX databases. CI/CD and automated testing. Secure coding, OAuth2, Entra ID/B2C, RBAC. You'll join the company that focus on technology, design, and customer outcomes, the company offers real opportunity for 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 ❯

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 ❯