1 to 25 of 116 Permanent API Development Jobs

Senior Developer, Back End, API, .Net SQL, NW London to £80K (office based role) A Senior Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed … required with expertise in .NET, C#/VB, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities ...

motivated individual with excellent data engineering and infrastructure skills, who can be independently forward deployed across NHS hospitals in London to lead development of infrastructure and data pipelines, working in SQL/dbt and using language AI for curating unstructured data. You will work on a pan-London Snowflake … orchestration frameworks Proficient in at least one modern cloud data platform Expertise in on prem/cloud infrastructure management Experience working in agile development teams with good development practices Expertise in NHS data models/data standards Ability to effectively break down complex analyses for non-technical stakeholders ...

SoftwareDeveloper(API Development/Backend Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid 1 day onsite a week) 55k + Benefits Were partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. Theyre looking for a Software Engineer with strong API and backend … development experience to work on complex, high-performing systems used by global clients. This Developer role offers the opportunity to build and enhance large-scale, data-driven applications with a focus on reliability, scalability, and performance. As a Software Engineer, youll take ownership of backend services and integrations, designing ...

Software Developer (API Development/Backend – Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid – 1 day onsite a week)55k + BenefitsWe’re partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. They’re looking for a Software Engineer with strong API … backend development experience to work on complex, high-performing systems used by global clients.This Developer role offers the opportunity to build and enhance large-scale, data-driven applications with a focus on reliability, scalability, and performance.As a Software Engineer, you’ll take ownership of backend services and integrations, designing ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active Secret clearance is required. - Bachelor's degree in related field required. - A Master's degree may substitute for 2 years of experience. - 10 years of software development experience in object-oriented ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active Secret clearance is required. - Bachelor's degree in related field required. - A Master's degree may substitute for 2 years of experience. - 10 years of software development experience in object-oriented ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

developing functional architecture, and other related management and technical duties. - Requires expertise in specialty areas. - Shall perform engineering tasks for back-end design and development efforts including, but not limited to, developing back-end architectures to support current and new system capabilities and integrations, RESTful API development and modification, database management, and data model development and optimization. Job-Specific Minimum Requirements: - Active TS/SCI clearance is required. - Must be able to report on-site in San Antonio, TX up to five days per week based on customer requirements. - Bachelor's degree in related field ...

keeping SQL Server and Azure SQL performing well. Clean architecture, SOLID principles and writing testable, maintainable code matter here. As well as your own development work, you'll contribute to code reviews, help shape technical standards, provide some light-touch mentoring to less experienced developers and engage directly with … stakeholders. Not a management role - but you'll have influence. Key Experience: 5+ years commercial .NET development Strong ASP.NET Core including MVC and API development Experience building Android apps with .NET MAUI or Xamarin.Forms Good OOP and software design skills, comfortable thinking about architecture Solid Entity Framework ...

with FastAPI). A product-first mindset is essential, ensuring the entire stack delivers reliable, high-quality experiences. Key Responsibilities End-to-End Feature Development Design, develop, and deploy features across the full technology stack Translate product requirements into scalable technical solutions Build systems from database schema to backend … services to frontend components Frontend Development & User Experience Develop high-performance, responsive interfaces using React and Next.js Optimize usability, performance, and responsiveness Implement polished UI elements including animations, accessibility improvements, and micro-interactions Collaborate with product and design stakeholders to deliver intuitive user journeys Backend Development & API ...

/No) No Mode (TP/FTE) TP Buy Rate $70/hr No of openings/positions 1 Job Title/Role Senior Development Engineer - Automation & AI Platforms Mandatory Skills Powershell JD Key Responsibilities Automation Platform Development (Lite-Touch) Design and build a Lite-Touch Automation Platform … enterprise automation frameworks or internal developer tools Strong DevOps engineering background Programming Advanced PowerShell automation and scripting frameworks C#/.NET application and platform development Source Control & Engineering Practices Git-based development workflows Branching strategies and pull request processes Code review and engineering quality practices Modern DevOps development ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rdparty products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

with GenAI, Gemini or Open source LLMs, Train, finetune and Onboard new LLMs Experience in building GenAI applications using Python Hands-on Experience with API Development and Microservices architecture and End to End integrations Knowledge of RAG (Retrieval-Augmented Generation) and ADK, MCP Solid understanding of LLMs, prompt … engineering, and graph-based workflows Hands-on Experience with API Development and Microservices architecture Experience in CI/CD pipelines, and containerization (Docker/Kubernetes), Harness and Git actions Practical experience implementing LLM and GenAI solutions, including prompt engineering, model fine tuning, RAG pipelines, embeddings, and vector databases ...

lead projects, mentor junior developers, and work on high-impact, secure banking solutions. You will be a key contributor to web portal and API development, ensuring performance, security, and reliability in a dynamic environment. This role is ideal for developers with strong technical expertise who are looking … portals using ASP.NET MVC/.NET Core Design and integrate REST APIs with internal and third-party services Implement secure authentication mechanisms (JWT, OAuth2, API Keys) Connect applications to relational databases using Entity Framework Core (DbContext, LINQ, Migrations) Debug and trace request flows from UI Controller API Database ...

week from office) £57,000 – £64,000 DOE Join a team at the centre of a major digital transformation, where modern engineering, secure software development, and large-scale technical innovation drive everything forward. This role places you at the forefront of designing and delivering complex, high-impact digital solutions … with wider digital ambitions. Skills Strong expertise in HTML, CSS, JavaScript Advanced commercial experience with React Confidence designing scalable front-end architecture Experience with API integration, cloud platforms, and CI/CD workflows Writing unit tests Modern front end testing frameworks like Jest Ability to mentor colleagues and collaborate ...

customers Building strong customer relationships through direct engagement Contributing to and helping prepare technical proposals and bids Assisting the customer account team in business development efforts Collaborating with delivery management to identify risks, plan deliveries, and support resource allocation Core Focus: Architecture & Integration Cross-domain strategy and secure system … What You Bring: Proven experience leading teams in Agile, customer-facing software projects Experience with one or more of the following: Full-stack web development Software as a Service (SaaS) Mobile application development API design and development Cloud platforms (AWS, Azure, GCP) Front-end development ...

design and build using the latest cloud technology.**What you’ll do...*** **Solution Design and System Integration:** Lead the design and development of robust software solutions using modern engineering techniques across GCP and Microsoft Azure stacks, aligned with Enterprise Architecture and Business Design strategy* **Thought Leadership:** A trusted advisor … solution governance across the Lab* **Delivering Design Outputs:** Such as Minimum Viable Designs and architecture decisions via formal governance processes* **Agile Methodologies:** Champion agile development practices, including continuous integration and test automation.**About you...**We're looking for an experienced individual who can thrive in a fast-paced environment ...

role in developing a scalable, secure, and maintainable platform that integrates ecommerce, CRM, licensing, and other business-critical systems. This is a hands-on development role for a developer who thrives on complex, integrated systems, enjoys problem solving across the full stack, and wants to contribute to a mission … full-stack technologies. Develop new features and functionality for both front-end and back-end components in following best practices. Implement and maintain robust API integrations with internal and third-party systems. Assist in monitoring, troubleshooting, and resolving production issues to maintain system reliability and data integrity. Participate ...

procedures and to modernise systems and practices so that they can deliver quality at pace. Currently the team are transitioning from traditional software application development using C#, Blazor and SQL Server integrating with Dynamics Business Central, and the Data team provide analytics and insights using SAS, MicroStrategy and Power … Engineers, an Automation Tester, Scrum Master, DevOps, Infra Engineers and Service Desk Team. You need to have experience of leading end to end software development including design, build, testing, deployment and support. The Service Desk team need to work closely with the build and deployment resources so that they ...

data services, and cloud platforms. You will own end-to-end integration architecture, champion modern engineering standards, and guide engineers through best practices in API design, cloud-native development, and scalable integration patterns. This is a hands-on leadership role, ideal for someone who enjoys coding, problem-solving … steering technical direction while mentoring engineers and collaborating with product, data, and platform teams. What You'll Be Doing Lead the design, development, and delivery of integration solutions across a diverse technology ecosystem Develop secure, scalable APIs, services, and messaging-based integrations Champion best practices in engineering, DevOps, automation ...