1 to 25 of 81 Permanent API Development Jobs in the South East

Do you have skills in C#, JavaScript, and SQL? Do you enjoy API development—both writing and consuming—as part of a wider full-stack role? Would you like the opportunity to work in an office-based role where you can closely collaborate with the dev team? If … telecom and energy sectors. As part of their expansion, they are now looking to onboard a Full Stack Developer to join their friendly, collaborative development team. You will have the chance to work across the full stack, with a particular focus on API development—both writing and … from design to delivery. What you will be doing: Designing and developing software applications using .NET and C# Contributing to both backend and frontend development Creating, consuming, and integrating APIs Collaborating with the team to add new features and fix bugs Staying current with new technologies and suggesting improvements More ❯

A leading global insurer are looking to hire an API Implementation Specialist to join a well established team which is growing. The role will involve developing analytics solutions using leading tech stacks and cloud technologies (Azure, Snowflake, Databricks and Python). The Role Develop and maintain an API strategy aligned with business objectives, enhancing current systems and integrating third-party APIs. Design and develop API architectures, set standards, and collaborate with stakeholders to integrate APIs with existing systems. Build integrations with both internal systems and external API providers. Document API development processes, code … and revisions using Confluence. Implement robust security protocols for APIs and coordinate with cybersecurity teams to address threats. Continuously monitor API performance, troubleshoot issues, and manage regular updates and maintenance. Communicate with developers, IT teams, and business leaders to align API initiatives with business goals. Provide training and More ❯

management practices. Collaborate with cross-functional teams to support digital transformation initiatives and enhance data-driven decision-making. Contribute to the support and continual development of the data landscape to ensure its optimal performance and availability. Requirements Excellent communication and collaboration skills, with the ability to manage multiple projects … Experience with any of the following would be desirable but not essential; Microsoft's Fabric data platform, Experience with ADF such as managing pipelines, API development, API webhooks, automation. Previous experience working with facilities management datasets. THE PACKAGE A competitive salary of up to £45,000 with More ❯

and we are seeking a highly motivated Software Developer (.NET Core & Umbraco) to join our growing team. As a cutting-edge provider of app development, cyber security, and cloud services, we are committed to delivering high-quality solutions to our clients that empower businesses to thrive in the digital … are looking for a versatile Software Developer with strong experience in .NET Core and Umbraco CMS. This role requires someone comfortable with both backend API development and CMS-based website implementation. You will work across multiple layers of the application stack, following best practices in Test-Driven Development (TDD) and Behaviour-Driven Development (BDD). RESPONSIBILITIES Develop and maintain backend solutions using ASP.NET Core Build and integrate secure, scalable RESTful APIs Implement and manage content-driven websites using Umbraco CMS (v8 or higher) Follow TDD and BDD methodologies to ensure code quality and coverage Write automated More ❯

prominent London Market Insurance firm, is seeking a skilled Technical Lead to join their growing team. You will be responsible for overseeing the design, development, and implementation of technological solutions within the Reinsurance Segment. You will play a crucial role in supporting the integration of new syndicates and ensuring … and regulatory requirements. Architect, design, and implement technology solutions that enhance underwriting, claims, policy administration, and reporting systems. Oversee all stages of the software development lifecycle (SDLC), from requirements gathering and system design to development, testing, and deployment. Ensure adherence to best practices in system security, data governance … Insurtech solutions, to identify opportunities for innovation. Desired Skills At least 3+ years of experience in PowerBuilder. At least 5+ years of rigorous application development and hands-on experience using Microsoft technologies stack At least 5+ years of hands-on experience with Microsoft .NET technologies and SQL Server Proficiency More ❯

for the backend. Design and optimize relational databases using PostgreSQL. Collaborate with cross-functional teams to deliver scalable, high-performance applications. Implement and enhance API services, ensuring efficiency and security. Work in an Agile development environment, adhering to best practices. Participate in code reviews, unit testing, and integration … testing. Required Skills & Experience Proficiency in Vue 3 and experience with modern front-end development practices. Strong backend development experience with NestJS (or Node.js). Experience with PostgreSQL, including designing schemas and writing efficient queries. Familiarity with CI/CD pipelines and DevOps workflows. Experience with RESTful API development and integration. Exposure to Agile methodologies (Scrum/Kanban). Ability to work autonomously while collaborating effectively with the team. Javascript Expertise Nice-to-Have Skills Experience with GraphQL and Prisma ORM. Knowledge of Python for backend or data-related tasks. Exposure to Azure services, such as More ❯

Solution Architect - AWS, API, Microservices, Remote, FinTech Salary - £90,000/£100,000 + 10% Bonus + Benefits Location - London, Remote We're proud to represent a FinTech scale-up setting a new industry standard in their market. With ambitious plans to scale the platform over the next few … understand business requirements and translate them into technical solutions Design and architect scalable, resilient, and secure microservices-based applications on AWS cloud platform. Develop API strategies and integrations to enable seamless communication between different systems and services. Provide technical leadership and guidance throughout the software development lifecycle, from … with microservices architecture, including design patterns, containerisation, and orchestration (e.g., Docker, Kubernetes). Strong proficiency in AWS cloud services, including EC2, Lambda, S3, RDS, API Gateway, and IAM. In-depth knowledge of secure financial systems, including banking, payments, trading, or risk management. Hands-on experience with API development More ❯

Solution Architect - AWS, API, Microservices, Remote, FinTech Salary - £90,000/£100,000 + 10% Bonus + Benefits Location - London, Remote We're proud to represent a FinTech scale-up setting a new industry standard in their market. With ambitious plans to scale the platform over the next few … understand business requirements and translate them into technical solutions Design and architect scalable, resilient, and secure microservices-based applications on AWS cloud platform. Develop API strategies and integrations to enable seamless communication between different systems and services. Provide technical leadership and guidance throughout the software development lifecycle, from … with microservices architecture, including design patterns, containerisation, and orchestration (e.g., Docker, Kubernetes). Strong proficiency in AWS cloud services, including EC2, Lambda, S3, RDS, API Gateway, and IAM. In-depth knowledge of secure financial systems, including banking, payments, trading, or risk management. Hands-on experience with API development More ❯

Solution Architect - AWS, API, Microservices, Remote, FinTech Salary - £90,000/£100,000 + 10% Bonus + Benefits Location - London, Remote We're proud to represent a FinTech scale-up setting a new industry standard in their market. With ambitious plans to scale the platform over the next few … understand business requirements and translate them into technical solutions Design and architect scalable, resilient, and secure microservices-based applications on AWS cloud platform. Develop API strategies and integrations to enable seamless communication between different systems and services. Provide technical leadership and guidance throughout the software development lifecycle, from … with microservices architecture, including design patterns, containerisation, and orchestration (e.g., Docker, Kubernetes). Strong proficiency in AWS cloud services, including EC2, Lambda, S3, RDS, API Gateway, and IAM. In-depth knowledge of secure financial systems, including banking, payments, trading, or risk management. Hands-on experience with API development More ❯

Solution Architect - AWS, API, Microservices, Remote, FinTech Salary - £90,000/£100,000 + 10% Bonus + Benefits Location - London, Remote We're proud to represent a FinTech scale-up setting a new industry standard in their market. With ambitious plans to scale the platform over the next few … understand business requirements and translate them into technical solutions Design and architect scalable, resilient, and secure microservices-based applications on AWS cloud platform. Develop API strategies and integrations to enable seamless communication between different systems and services. Provide technical leadership and guidance throughout the software development lifecycle, from … with microservices architecture, including design patterns, containerisation, and orchestration (e.g., Docker, Kubernetes). Strong proficiency in AWS cloud services, including EC2, Lambda, S3, RDS, API Gateway, and IAM. In-depth knowledge of secure financial systems, including banking, payments, trading, or risk management. Hands-on experience with API development More ❯

Software Engineering Manager – Product Development (Cloud & Platform) Location: Hybrid/Maidenhead (3 days in the office Tues/Wed/Thurs) We are seeking a hands-on and strategic Engineering Manager to lead global Agile engineering teams in building and maintaining scalable, high-performance software solutions. You’ll guide … teams through the full software development lifecycle—from concept through release—while promoting engineering excellence, technical quality, and process improvement. This is an excellent opportunity to shape modern cloud-native products, influence technical decisions, and mentor engineers across development and quality assurance. Key Responsibilities Lead a global team … or contribute to the design and delivery of production-grade, high-availability cloud services . Influence tooling and framework adoption aligned with modern software development best practices. Support recruiting efforts and team structuring to align with business goals. Qualifications 5+ years’ experience managing software engineering teams delivering product solutions. More ❯

Experience: 10+ years About the Role: We are seeking a highly skilled and versatile Senior Developer to join our team and contribute to the development and maintenance of our cutting-edge Azure Databricks platform for economic data. This platform is critical for our Monetary Analysis, Forecasting, and Modelling activities. … The Senior Developer will be responsible for both front-end and back-end development, with a focus on Python, including the challenging but rewarding task of reverse engineering an existing codebase to integrate new features and improvements. This role requires a strong understanding of software development principles, experience … with various programming languages and frameworks, and a passion for building high-quality, scalable, and maintainable software. Drive the development of MVPs, ensuring timely delivery and alignment with business goals. Key Responsibilities: Full-Stack Development: Contribute to both front-end and back-end development of applications and More ❯

dynamic and supportive team who encourage collaboration, fostering a culture of innovation. In this position you will play a key role in the design, development and testing of software applications and tools for both internal and external stakeholders. You will be assisting the Engineering Team and Product Owners in … turning project requirements into technical tasks for the Development Team, producing sensible estimates for the tasks. As a Senior Software Engineer, you will keep abreast of new developments across the business, and you will work with the team to implement best practice. You will promote better working practices and … the adoption of tools that improve the efficiency and quality of development within the team. You will use your previous experience to assist in the delivery, design, implementation, configuration and testing of large and complex modules within a product. You will also seek opportunities to share your knowledge and More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

AWS) Databases : 🌳 PostgreSQL, DynamoDB Additional Tools & Frameworks : 🌳 GraphQL 🌳 REST APIs 🌳 Software Design Patterns – TDD, DDD 🌳 Agile methodologies: Scrum and Kanban Key Responsibilities : Full-Stack Development : Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management : Build scalable, cloud-based solutions using … AWS , PostgreSQL , and DynamoDB . API Development : Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns : Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD : Use DevOps processes, including … virtualization , containerization , and CI/CD pipelines to streamline development and deployment. Agile Collaboration : Work closely with cross-functional teams using Scrum and Kanban to deliver high-quality products in an agile environment. Requirements : Polyglot Developer : Proficiency in multiple programming languages and frameworks, with the ability to work across More ❯

excellence in our network infrastructure. Essential Technical Skills: Front-end: Angular, TypeScript Back-end: Java, Python, Spring Boot Database: MongoDB, PL/SQL,NOSQL API Development: RESTful APIs Version Control: Git CI/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus, Grafana, ELK Stack … Cloud Platforms (AWS, Azure, Google Cloud) Security and Compliance API Documentation (e.g., Swagger, OpenAPI) Code Quality Tools (e.g., SonarQube) Agile Methodologies (Scrum or Kanban) Soft Skills: Team Collaboration : Ability to work effectively with cross-functional teams, sharing knowledge and expertise. Proactive Approach : Anticipate challenges, identify opportunities, and take initiative … and Resilience : Drive issues to resolution, navigating complexities without getting bogged down. Training CACI Network Services develops individuals through a portfolio of training and development options such as certified training courses, workshops, technical conferences, boot camps, on-line training and much more. You will have the opportunity to work More ❯

when needed. You will: Design and build new scalable backend services using TypeScript, and Java Support and maintain existing PHP systems Contribute to frontend development (primarily in React.js) when required Work on system integrations, microservices, and API development Collaborate with product managers, designers, and fellow engineers to … resolve production issues with a focus on root cause analysis Participate in Agile ceremonies and iterative product delivery cycles Key Experience & Skills: 🍨 Strong backend development experience in PHP Proficiency with TypeScript and/or Java and experience with modern web applications Solid understanding of RESTful APIs, event-driven architecture More ❯