1 to 25 of 42 API Development Jobs in the South East

Senior Software Engineer/Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines is required for a well-established company based in Bedford, Bedfordshire. TWO JOBS AVAILABLE WOULD YOU LIKE TO HELP SHAPE THE FUTURE OF THE COMPANYS TECHNOLOGY? If you can design … Will Apply JOB TYPE: Full-Time, Permanent JOB OVERVIEW We have a fantastic new job opportunity for a Senior Software Engineer/Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines. Working as a Senior Software Engineer/Software Developer youll design and … ensuring technical concepts are understood by all stakeholders CANDIDATE REQUIREMENTS Proven experience with Azure cloud services (App Services, Functions, SQL Database), identity & access, and infrastructure as code Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines Solid understanding of secure coding practices and compliance in SaaS environments More ❯

Must have skills: • A successful LCNC and API Integration Architect typically has a strong background in software development and systems integration. Essential qualifications include: • Technical Expertise: Deep knowledge of integration patterns, API architecture (REST, SOAP), and microservices. Proficiency with at least one major iPaaS or LCNC platform. • Analytical Skills: The ability to analyze complex business problems and … Excellent verbal and written communication skills to effectively collaborate with both technical and non-technical stakeholders. • Leadership: Experience leading large-scale integration projects in an agile environment and mentoring development teams. • Problem-Solving: Strong troubleshooting and problem-solving abilities to address integration issues in a timely manner Minimum number of relevant years of experience: - 10+ years of exp in … API and LCNC development. - Minimum 3 to 4 years of architect experience. RESPONSIBLITIES A Low-Code/No-Code (LCNC) and API Integration Architect is a senior technical role responsible for designing and overseeing the implementation of enterprise-wide integration solutions, with a strong emphasis on using low-code/no-code platforms and APIs. This role combines More ❯

Must have skills: • A successful LCNC and API Integration Architect typically has a strong background in software development and systems integration. Essential qualifications include: • Technical Expertise: Deep knowledge of integration patterns, API architecture (REST, SOAP), and microservices. Proficiency with at least one major iPaaS or LCNC platform. • Analytical Skills: The ability to analyze complex business problems and … Excellent verbal and written communication skills to effectively collaborate with both technical and non-technical stakeholders. • Leadership: Experience leading large-scale integration projects in an agile environment and mentoring development teams. • Problem-Solving: Strong troubleshooting and problem-solving abilities to address integration issues in a timely manner Minimum number of relevant years of experience: - 10+ years of exp in … API and LCNC development. - Minimum 3 to 4 years of architect experience. RESPONSIBLITIES A Low-Code/No-Code (LCNC) and API Integration Architect is a senior technical role responsible for designing and overseeing the implementation of enterprise-wide integration solutions, with a strong emphasis on using low-code/no-code platforms and APIs. This role combines More ❯

Must have skills: • A successful LCNC and API Integration Architect typically has a strong background in software development and systems integration. Essential qualifications include: • Technical Expertise: Deep knowledge of integration patterns, API architecture (REST, SOAP), and microservices. Proficiency with at least one major iPaaS or LCNC platform. • Analytical Skills: The ability to analyze complex business problems and … Excellent verbal and written communication skills to effectively collaborate with both technical and non-technical stakeholders. • Leadership: Experience leading large-scale integration projects in an agile environment and mentoring development teams. • Problem-Solving: Strong troubleshooting and problem-solving abilities to address integration issues in a timely manner Minimum number of relevant years of experience: - 10+ years of exp in … API and LCNC development. - Minimum 3 to 4 years of architect experience. RESPONSIBLITIES A Low-Code/No-Code (LCNC) and API Integration Architect is a senior technical role responsible for designing and overseeing the implementation of enterprise-wide integration solutions, with a strong emphasis on using low-code/no-code platforms and APIs. This role combines More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Contract Developer - Node.js development, REST API design, and SIP-based communications Duration: 3 months (Outside IR35) Location: Bracknell/Hybrid Contract Developer with deep expertise in Node.js development, REST API design, and SIP-based communications. This role is crucial for supporting the migration of legacy device management, call control, and configuration workflows to a secure, scalable … Cloud Migration & Refactoring: Analyse existing applications to identify dependencies on on-prem infrastructure and design cloud-native solutions. Refactor services to enhance scalability and reliability in the cloud. Service & API Development: Develop and maintain secure REST APIs for functionalities such as SIP authentication, call control, and real-time data interactions. Real-Time Communication Integration: Implement and maintain robust … Compliance: Oversee the migration of sensitive data to secure cloud storage solutions, ensuring compliance with GDPR and other regulatory standards. Required Skills & Qualifications: Experience: Minimum 3 years of backend development experience using Node.js/Express. Proven track record in building and deploying REST APIs. Experience with SIP/TLS integration and managing real-time communications. Familiarity with cloud services More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

the success driving innovation and 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 to drive progress. Ownership and Accountability : Take ownership of tasks and projects, driving them to … the larger picture. Problem-Solving 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 on some of the most More ❯

the success driving innovation and 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 to drive progress. Ownership and Accountability : Take ownership of tasks and projects, driving them to … the larger picture. Problem-Solving 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 on some of the most More ❯

the success driving innovation and 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 to drive progress. Ownership and Accountability : Take ownership of tasks and projects, driving them to … the larger picture. Problem-Solving 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 on some of the most More ❯

range of £30,000 - £80,000 The chance to contribute to an organisation making a meaningful social impact. Working within a supportive and mission-driven environment. Opportunities for professional development and career progression. Key Responsibilities Design, development, and implementation of modern, web-based applications. Drive improvements across codebases, development practices, and deployment processes. Build and manage APIs … and cloud platforms. Work within Agile and DevOps methodologies to deliver high-quality solutions. About You Proven experience in software development with expertise in C#, .NET, Azure, and SQL . Strong background in API development, cloud adoption frameworks, and modern architectures. Excellent problem-solving skills with the ability to thrive under pressure. Skilled in CI/CD More ❯

to agile ceremonies, code reviews, and DevOps pipelines. Ensure applications meet performance, security, and compliance standards. Support deployment and maintenance of services in secure environments. Key Skills & Experience Frontend & API Development: Node.js, React, Next.js TypeScript Express.js Docker Azure Web Apps Backend Development: Azure Function Apps (Node.js, TypeScript) Elasticsearch Kubernetes (AKS) Infrastructure & DevOps: Microsoft Azure: Cosmos DB, API … . What's on Offer £70,000 - £85,000 base salary Performance-based bonus Flexible working options Secure project environments Inclusive culture with access to DEI networks and continuous development This is a unique opportunity to contribute to national security through cutting-edge software engineering. If you're passionate about solving real-world problems in secure environments and want More ❯

technical concepts are understood by all stakeholders. The must haves: Proven experience with Azure cloud services (App Services, Functions, SQL Database), identity & access, and infrastructure as code. Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines. Solid understanding of secure coding practices and compliance in SaaS environments … technical debt against business value. The nice to haves: Degree level of education or equivalent in a relevant subject such as Computer Science, Computer Engineering, information management systems, software development or business information systems etc. Practical understanding of applied AI in data platforms. Wed also love you to: Ensure that the company values are reflected in your own work More ❯

an experienced Senior Java Developer to join their dynamic technology team. This role offers the opportunity to work on high-impact financial applications, driving innovation and excellence in software development within a fast-paced and regulated environment. As a Senior Java Developer, you will play a key role in designing, developing, and maintaining enterprise-grade applications, while mentoring junior … code reviews and provide constructive feedback. Collaborate with cross-functional teams to define, design, and deliver new features . Troubleshoot and debug complex issues. Required Qualifications Professional Java software development experience. Strong understanding of object-oriented programming and design patterns . Hands-on experience with Spring and Hibernate frameworks. Solid experience with relational databases (MSSQL, Oracle). Proven experience … with RESTful API design and development . Strong background in unit, regression, and integration testing (JUnit). Experience with Maven/Gradle build tools. Proficiency with Git or similar version control systems. Excellent problem-solving and communication skills . Ability to work independently as well as collaboratively in a team. Desirable Skills Experience with cloud platforms (AWS, Azure More ❯

in ambiguity, enjoys problem-solving, and can design scalable, high-performing systems that integrate legacy platforms with modern web services. Key Responsibilities Design and implement scalable database schemas and API interfaces to support large-scale user-generated content with a focus on security, performance, and developer experience. Architect clean, performant RESTful APIs, GraphQL solutions, and AI-powered features integrating … Customer Data Platforms (CDPs) and AI/ML capabilities (semantic search, RAG, vector embeddings, prompt engineering). Drive end-to-end project delivery - from scoping requirements to hands-on development in Python, Node.js, Go (with some PHP). Troubleshoot third-party integrations, resolve performance bottlenecks, and develop automated tests. Collaborate with cross-functional teams across multiple time zones, translating … complex business requirements into clear, actionable solutions. Skills & Experience 5+ years' backend API development experience with Python/Django, Node.js/NestJS, or Golang/Gin. Proven experience building APIs for enterprise-grade apps with complex integrations. Strong skills in system design and SQL data modeling for high-traffic applications (10k+ daily users). Hands-on experience with More ❯

functionality. Communication & Collaboration: Effectively communicate product vision, roadmap, and priorities to all stakeholders, including engineering, sales, marketing, and customer success teams. Facilitate cross-functional collaboration to ensure seamless product development and launch. Gather and analyze user feedback to identify areas for improvement and inform future product iterations. Manage external vendor relationships and ensure successful integration with third-party platforms. … DSPs), supply-side platforms (SSPs), and ad exchanges. Strong technical knowledge of ad serving, real-time bidding (RTB), and ad analytics. Strong technical background with experience working with software development methodologies (Agile, Scrum). Excellent communication and collaboration skills with the ability to influence cross-functional teams. Data-driven mindset with experience in defining and tracking product KPIs. Experience … in user research and ability to translate user feedback into actionable product roadmaps. Desired: Experience with API development and integration. Experience working with cloud-based platforms (e.g., AWS, Azure, GCP). Experience in managing external vendor relationships (optional, but a plus). What you’ll get back from us Alongside being challenged daily and a real interest in More ❯

functionality. Communication & Collaboration: Effectively communicate product vision, roadmap, and priorities to all stakeholders, including engineering, sales, marketing, and customer success teams. Facilitate cross-functional collaboration to ensure seamless product development and launch. Gather and analyze user feedback to identify areas for improvement and inform future product iterations. Manage external vendor relationships and ensure successful integration with third-party platforms. … DSPs), supply-side platforms (SSPs), and ad exchanges. Strong technical knowledge of ad serving, real-time bidding (RTB), and ad analytics. Strong technical background with experience working with software development methodologies (Agile, Scrum). Excellent communication and collaboration skills with the ability to influence cross-functional teams. Data-driven mindset with experience in defining and tracking product KPIs. Experience … in user research and ability to translate user feedback into actionable product roadmaps. Desired: Experience with API development and integration. Experience working with cloud-based platforms (e.g., AWS, Azure, GCP). Experience in managing external vendor relationships (optional, but a plus). What you’ll get back from us Alongside being challenged daily and a real interest in More ❯

functionality. Communication & Collaboration: Effectively communicate product vision, roadmap, and priorities to all stakeholders, including engineering, sales, marketing, and customer success teams. Facilitate cross-functional collaboration to ensure seamless product development and launch. Gather and analyze user feedback to identify areas for improvement and inform future product iterations. Manage external vendor relationships and ensure successful integration with third-party platforms. … DSPs), supply-side platforms (SSPs), and ad exchanges. Strong technical knowledge of ad serving, real-time bidding (RTB), and ad analytics. Strong technical background with experience working with software development methodologies (Agile, Scrum). Excellent communication and collaboration skills with the ability to influence cross-functional teams. Data-driven mindset with experience in defining and tracking product KPIs. Experience … in user research and ability to translate user feedback into actionable product roadmaps. Desired: Experience with API development and integration. Experience working with cloud-based platforms (e.g., AWS, Azure, GCP). Experience in managing external vendor relationships (optional, but a plus). What you’ll get back from us Alongside being challenged daily and a real interest in More ❯

/week onsite) Salary: £60,000 - £70,000 (depending on experience) Employment Type: Full-Time, Permanent Overview A dynamic consultancy is seeking a Senior Analytics Engineer to lead the development of scalable data solutions across a range of high-impact projects. This role offers the opportunity to work at the intersection of data engineering, analytics, and software development … Airflow . Collaborate with clients to understand business challenges and deliver tailored data solutions. Transform raw data into structured, actionable datasets for use in AI , predictive modelling , and platform development . Promote engineering best practices including automation, testing, and code quality. Mentor junior team members and lead technical workstreams to elevate team capability. Essential Skills & Experience Proven experience in … analytics engineering , data engineering , or model development roles. Advanced proficiency in Python (including libraries such as NumPy and Pandas) and SQL . Demonstrated ability to deliver production-ready solutions in a commercial environment. Strong communication skills with the ability to engage stakeholders and translate technical work into business outcomes. Hands-on experience with cloud platforms (preferably AWS or Snowflake More ❯

API Implementation Manager An incredible opportunity to join a Global Leader in Speciality Insurance. Be part of a team that’s putting data and analytics at the centre of decision-making. This role is all about shaping how cutting-edge API solutions are designed, built, and integrated to drive business performance. Role Overview: Location: Hybrid/Central London … Package: £70,000–£90,000pa Performance Bonus Benefits Industry: Insurance What You’ll Be Doing: Develop and lead API strategy to connect internal systems and third-party platforms. Design, build and maintain secure, scalable APIs using modern architectures. Own API documentation and ensure clear standards for development and deployment. Monitor, maintain, and troubleshoot APIs to optimise performance. … Partner with cybersecurity, IT and business leaders to ensure secure, effective solutions. Manage vendor relationships and assess new technologies in the API space. Train and support colleagues to get the best from API-driven solutions. Play a key role in analytics-driven projects that shape business strategy. Main Skills Needed: Minimum of 4+ years’ experience leading software projects More ❯

working across the lifecycle of a complex software product SAFe Agile Product Management (or demonstrate an understanding of the principles through experience/application) Demonstrate experience of working with development teams using scaled agile delivery to proactively manage and communicate timelines, milestones, and dependencies. Effective communicator across different stakeholder groups interacting within every level of the business to achieve … responsibility to drive delivery, and uses initiative to solve challenges Comfortable to constructively challenge the norm and suggest improvements Desirable: Technical skills& understanding should include: SQL, .NET, Azure services & API development Experience of integration engines/middleware/messaging solutions Understanding of the requirements for deploying software into a clinical environment Experience in healthcare is a bonus, especially More ❯

LangChain, LlamaIndex, or similar technologies Advanced programming skills in Python or JavaScript for rapid prototyping and system integration Familiarity with workflow automation solutions (UiPath, Power Automate, Zapier, n8n) and API development Practical knowledge of vector databases and embedding technologies for RAG system implementation Outstanding interpersonal skills - capable of converting business challenges into technical AI strategies Background in agile More ❯