13 of 13 Permanent API Development Jobs in Chelmsford

Please note: This is a CONTRACT Opportunity About the Role Our client is on a mission to build a cutting-edge API management platform in AWS, and they need a Senior Integration Engineer to drive this initiative forward. This role is crucial in designing, implementing, and optimizing integrations across … ecosystem, ensuring seamless connectivity, security, and efficiency. If you thrive in cloud-native environments , have deep expertise in AWS services , and are passionate about API architecture and integrations , we’d love to hear from you! Key Responsibilities Architect and develop scalable, resilient, and secure integrations for our API management platform in AWS Design and implement API gateways, authentication mechanisms, and monitoring solutions Develop automation pipelines for API deployments and infrastructure management Collaborate with engineering teams to define best practices and governance for API lifecycle management Ensure compliance with security policies and standards, implementing robust 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 ❯

Level). 🎯 Impact | Technology Transformation, Modernization, and Scalability. 📏 Size | Medium-sized team, part of an exciting in-house engineering transformation. 🌟 Skills | PHP (Laravel), JQuery, API Development, MySQL, SOLID Principles, and modern DevOps tools. 📍 Location | London, UK/Remote - You must be eligible to work in UK 💻 Hybrid | Flexible … opportunity to make a real impact within a fast-growing fintech company undergoing an exciting technology transformation? As part of a motivated and collaborative development team, you’ll play a pivotal role in enhancing and modernizing the company’s tech stack. This involves building a robust backend API … points if you have worked with DevOps practices or modern tools like Docker or Kubernetes . Role Responsibilities: • Develop and maintain a robust backend API using PHP Laravel. • Enhance the platform with innovative new features that align with the product roadmap. • Seamlessly integrate third-party APIs into the system. More ❯

and FastAPI, though experience with other frameworks is valuable), cloud services (particularly AWS), and modern AI approaches including working with agentic architecture. Key ResponsibilitiesBackend Development & Architecture · Design and implement scalable backend services using Python, with experience in Django, FastAPI, or similar frameworks · Architect and maintain production-grade, multi-tenant … Implement data validation, transformation, and enrichment processes · Optimise data storage and retrieval for AI/ML workloads Security & Compliance · Implement security best practices in API development and backend systems · Design secure authentication and authorisation mechanisms · Ensure compliance with relevant regulations for pharmaceutical data · Conduct security reviews and implement … and technical roadmap planning · Work cross-functionally with data scientists and product managers Qualifications and SkillsRequired Skills and Experience · 5+ years of Python backend development experience · Proficiency with Django, FastAPI, or similar Python web frameworks · Experience building and maintaining production-scale, multi-tenant applications · Strong knowledge of cloud services More ❯

APIs for 3rd party integrations. The ideal candidate will have substantial expertise in working with Node, ideally in an AWS serverless environment. Responsibilities: Backend Development: Design, develop, and maintain serverless systems in Node on AWS. Utilize AWS services such as Lambda, DynamoDB, S3, ECS, ECR for efficient data processing. … Develop and maintain Docker containers for data processing. Integration and Deployment: 3rd party API development Work on systems using AWS ECS and ECR for deployment. Implement and optimize CI/CD pipelines for efficient deployment processes. Monitoring and Logging: Implement and maintain monitoring solutions using CloudWatch. Utilize EventBridge … flexibility of working from anywhere. Comprehensive health insurance coverage for you and your family. Plan: Secure your future with our contributory pension scheme. and Development: Continuous learning opportunities to enhance your skills. Balance: Flexible working hours to support your work-life balance. Leave: 25 days paid (plus Bank Holidays More ❯

growing Insurance company who have an exciting opportunity for a Senior Software Developer experienced with C#, .NET and Vue.JS to join their Agile Software Development team. You will be developing and delivering high quality, robust software in the cloud spanning a wide range of applications. As this is a … able to work on your own, and in a team to develop MVC based web applications, and Web APIs. Essential Skills: .NET C# Web API Development Vue.JS Developing cloud based applications on Azure Exposure to Blazor Benefits: Competitive base salary Career Progression Remote Working Learning and Development More ❯

Work You’ll Do We are seeking a Security Data Analyst to join our team. This role will combine data analysis, security research, and development skills where you will be responsible for designing, developing a platform capable of analyzing large datasets for security and compliance requirements. You will leverage … Bachelor’s degree in computer science, Engineering, or a related field (or equivalent work experience). 5+ years of experience in software/platform development/engineering from front end (web), mobile, back end, ad tech, or analytics dataflows backgrounds. Extensive experience in dataflows, or similar roles in data … intensive applications. Experience with navigating and handling large data sets and the ability to design and implement scalable and maintainable systems Strong background in API development and associated architectural patterns such as REST or gRPC Programming experience in Python, Go, Java, or similar. Experience with data science concepts More ❯

Work You’ll Do We are seeking a Security Data Analyst to join our team. This role will combine data analysis, security research, and development skills where you will be responsible for designing, developing a platform capable of analyzing large datasets for security and compliance requirements. You will leverage … Bachelor’s degree in computer science, Engineering, or a related field (or equivalent work experience). 5+ years of experience in software/platform development/engineering from front end (web), mobile, back end, ad tech, or analytics dataflows backgrounds. Extensive experience in dataflows, or similar roles in data … intensive applications. Experience with navigating and handling large data sets and the ability to design and implement scalable and maintainable systems Strong background in API development and associated architectural patterns such as REST or gRPC Programming experience in Python, Go, Java, or similar. Experience with data science concepts More ❯

and cloud-based projects with a strong emphasis on solution design and technical leadership. Role & Responsibilities: Lead delivery of key projects across cloud migration, API development, digital platforms, and system integration Work within value streams and Centres of Excellence, aligning project goals with business strategy Act as a More ❯

for a SIEM Engineer to continue developing their expertise in security platforms at an established Microsoft Partner. The company places strong emphasis on staff development, offering support for training and professional certifications. You’ll also gain exposure to cutting-edge technologies, working across security operations and cyberspace. This is … Roles & Responsibilities Create, maintain, and optimise Logic Apps and Sentinel playbooks to automate incident detection and response workflows in Microsoft Sentinel. Develop and implement API integrations between Microsoft Sentinel and other systems to enhance data collection, cross-system communication, and automation. Leverage APIs to streamline security operations and increase … workflows, and incident response processes within Microsoft Sentinel. Experience in building and maintaining workflows with Azure Logic Apps to automate processes. Strong experience in API development and integration. Proficiency in KQL, JSON, and PowerShell. Good written and verbal communication skills. Technical understanding of IT infrastructure – Microsoft 365 suite More ❯

implementation and improving the overall quality of these key growth drivers. Key Skills: Proficient in React Experience in Ruby environments. Experience with GraphQL for API development and integration. Solid understanding of HTML, CSS, and JavaScript standards. Knowledge of testing frameworks (e.g., Jest, React Testing Library) is a plus. More ❯

Interim API Developer | Hybrid or Remote | 3 Month Contract | Global Facilities Organisation We're working with a rapidly growing global facilities management business undertaking a large-scale digital transformation — moving from a patchwork of heavily customised on-prem systems to a modern cloud environment. The Situation Phase 1 of … the integration has been delivered by a third-party integrator, but Phase 2 is stalling. The business needs an experienced, independent API Developer to step in immediately, take the reins, and deliver point-to-point integrations between multiple systems. What’s In Place Legacy ERP, payroll, ops, and task … on the journey of the "what", "how", and "why". Must Haves Independent mindset — able to deliver under your own steam Strong experience building API integrations end-to-end Able to work across systems, define and advise on best approaches Comfortable working across business teams and tech stakeholders Integration More ❯

asset management sectors. Proficient in Python 3, including pandas, GeoPandas, boto3, Pydantic, and Data Version Control (DVC). Familiar with Django 4 and core API development. Strong hands-on experience with AWS cloud infrastructure, EKS, and Docker. Solid understanding of data concepts (relational databases, validation, cleansing) and algorithms/… data structures. Experienced in Agile development environments and test-driven development. Background working with geospatial data and feature engineering for machine learning applications. Good communicator, team player, with strong attention to detail and creativity. Desirable: Demonstrated portfolio of work (e.g., open-source contributions, blogs, talks). Experience working with More ❯