1 to 25 of 87 Permanent API Development Jobs in the UK

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 ...

scale. About the Role As a Founding Engineer, you will have responsibility across the entire technical stack — from architecture and infrastructure through to product development and optimisation. You will operate with a high degree of autonomy, solving difficult engineering problems and establishing the foundations of the company’s technology. … systems. Solve complex technical challenges with speed and precision. Build prototypes, test ideas and rapidly iterate towards production solutions. Establish engineering standards, tooling and development practices. Optimise systems for performance, reliability and scalability. Work directly with founders to shape product strategy and technical direction. Take ownership of projects from ...

technical leadership for the design, build, productionisation and ongoing operation of secure Django-based applications and supporting infrastructure. The role will establish the development processes, coding standards, API standards, security approach, RBAC model and application architecture needed for repeatable delivery. The developer will bring extensive experience in productionising … securing Django applications, embedding automated testing, CI/CD and agile development practices, and creating documentation to support Technical Design Authority (TDA), security assurance and operational handover. Responsibilities Lead the architecture, development and deployment of secure Django applications and associated infrastructure in Azure. Define and embed Django 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 ...

partners are typically interested in engineers with experience across one or more of the following areas: AI and Machine Learning Engineering Applied AI development Machine learning systems LLM applications Generative AI tools AI agents and automation Model integration Prompt engineering AI product development Evaluation and optimisation … systems Software Engineering Backend development Full stack development API design and development Distributed systems Platform engineering Cloud-native software Scalable software architecture Testing, reliability, and performance optimisation Data, Cloud and Infrastructure Data pipelines MLOps Data infrastructure Cloud platforms such as AWS, Azure, or Google Cloud Containerisation ...

environment, you'll collaborate closely with the wider Delivery team to design, build and maintain high-quality software solutions. You'll contribute throughout the development lifecycle, from shaping technical solutions and planning through to implementation, testing, deployment and ongoing improvement. You will work across a modern Microsoft technology stack … services while helping to influence how we design, develop, and deliver our products . We encourage developers to explore new technologies , including AI-assisted development tools and automation, where they can deliver genuine value for our customers and teams. Key Responsibilities Working under the guidance of the Team Leader ...

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 ...

Overview Provide technical leadership across development teams to ensure the design and delivery of high-quality, scalable, and maintainable software solutions. The role combines hands-on development expertise with leadership responsibilities, translating business requirements into robust technical solutions while driving engineering excellence, delivery consistency, and collaboration across onshore … offshore teams. Responsibilities Technical Leadership & Solution Delivery Lead the design and development of key features, components, and services across the application stack Provide hands-on guidance in building scalable applications using React, Node.js, and TypeScript Own critical technical decisions, ensuring alignment with architectural standards and long-term scalability goals ...

working within embedded Linux environments, supporting build and release processes, contributing to automated testing, and helping improve how software moves from development into production. You'll work closely with colleagues developing hardware platforms and AI-driven algorithms, helping bring new capabilities into products that are already deployed in demanding … Linux environments and be comfortable owning technical work from concept through to delivery. We're particularly interested in people with experience of: Modern C++ development within Linux-based systems Embedded Linux environments, ideally involving Yocto or Buildroot Python for scripting, automation, tooling or API-related development CMake ...

looking for an experienced Mid-Level Full Stack Developer to join our engineering team and play a significant role in the design, development, and delivery of our products. This role is ideal for someone at the upper end of mid-level, with strong commercial experience across both frontend … backend development who is ready to take real ownership of their work. You will deliver features end to end with minimal supervision, contribute to technical and design decisions, and help raise standards across the team. The role combines hands-on development with a growing influence ...

partners comprising 45% of our partnership. The team you will join We are looking for a proactive and enthusiastic Software Developer to join our development team. This is a hands-on software engineering role supporting a varied portfolio of applications and services used by both Birketts colleagues and clients. … will contribute to the development, support and continuous improvement of solutions across both Microsoft Azure cloud platforms and existing on-premises systems. The role offers an excellent opportunity to work across a diverse technology landscape, balancing the enhancement and support of established business-critical applications with the development ...

Freelance Senior Java Resource on Contract Total Experience : 4 years Skills: Java Development, Acquainted with usage of Jira, Usage of Eclipse, Maven and Code management using GitHub Expectation: Attend daily stand up meeting with client, develop and review code. End to End responsibility. Remuneration: INR 80,000 per month … SITEL) Total experience : 8-9 years Relevant experience : 5-6 year. Very strong in HTML, CSS, Javascript, PHP, JQuery, SQL, Angular, React, Web/API services, web architect, Node.js Python will be add‐on advantage. Upload your profile on Imurgence and Send Profile to saikat.ghosh@sitel.com Added date ...

production-grade software. This role is ideal for someone who enjoys working at pace in secure, technically challenging environments, with opportunities to contribute across API development, cloud-native services and data integration. Typical responsibilities include: Developing software services using languages such as Java, JavaScript, TypeScript, Python or C++ … platforms, data services and streaming technologies Implement monitoring, logging and observability to support live service operation Support secure deployment and operation of applications across development, test and production environments Skills Required Experience working within the UK Security & Intelligence, defence or other secure government environments Strong knowledge of modern software ...

Senior Backend Software Engineer - Application Development Own the architecture and delivery of scalable backend services for Palantir's Foundry platform. Location: London Job Tags: Software About The Role Palantir builds the world's leading software for data-driven decisions and operations. By bringing the right data to the people … system that enables a novel workflow, the next you could be fine-tuning performance to enable low-latency operational outcomes. Our Product Development organization is made up of small teams of Software Engineers. Each team focuses on a specific aspect of a product and work collaboratively to build cross ...

across the stack rather than remaining within a narrow technical specialism. You could have experience across several of the following: • Java and modern backend development • JavaScript and web technologies • RESTful API development and integration • Kubernetes and container platforms • OpenShift • GitLab and CI/CD pipelines • Distributed systems … opportunity to work alongside experienced engineers within a collaborative and low-ego culture. Around 10% of working time is dedicated to training and development, including external courses, innovation projects, and personal development activities. Package highlights include: • 10% employer pension contribution • Relocation support • Genuine investment in technical development ...

work closely with an experienced Technical Lead on the continued evolution of the platform. The Role You'll be involved across the full software development lifecycle, working on both new features and enhancements to an established platform. You'll be working with technologies including: C#/.NET React MongoDB … Kubernetes REST APIs High-volume data processing The role offers plenty of variety, with work spanning backend development, frontend features, cloud infrastructure, integrations and ongoing platform improvements. What They're Looking For We're keen to speak with developers who have experience with: Commercial C#/.NET development ...

Architect to take a leading role in designing robust, scalable, and innovative technology solutions for our clients. You will work closely with stakeholders and development teams to ensure the alignment of technology with business goals, while championing best practices in architectural design and delivery. Key Responsibilities: Collaborate with development … lead and influence technical discussions Proven experience as a Technical Architect or similar role In-depth knowledge of system design, software architecture, and development methodologies Experience with cloud platforms (e.g., AWS, Azure, Google Cloud) Expertise in architectural design, data pipelines, cloud platforms, and API development Knowledge ...

Architect to take a leading role in designing robust, scalable, and innovative technology solutions for our clients. You will work closely with stakeholders and development teams to ensure the alignment of technology with business goals, while championing best practices in architectural design and delivery. Key Responsibilities: Collaborate with development … lead and influence technical discussions Proven experience as a Technical Architect or similar role In-depth knowledge of system design, software architecture, and development methodologies Experience with cloud platforms (e.g., AWS, Azure, Google Cloud) Expertise in architectural design, data pipelines, cloud platforms, and API development Knowledge ...

technical strategy Work within a senior, AI-first engineering environment KEY POINTS Senior technical leadership role with significant architectural ownership Leading the design and development of a modern platform rebuild Strong focus on Node.js, TypeScript, React and cloud technologies Opportunity to shape engineering standards, architecture and AI adoption ABOUT … technologies and cloud infrastructure. Working closely with Product teams, stakeholders and fellow engineers, you'll help establish engineering standards, drive adoption of AI-assisted development practices and provide technical mentorship across the team. The organisation has embraced an AI-first approach to software engineering, making extensive use of modern ...

make a difference solving the world s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect … with your peers on technical direction within your team Desired Skills and Experience Core Software Engineering JavaScript frameworks (React, NextJS) TypeScript Python Java REST API development OpenAPI/Swagger Cloud & Infrastructure Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Data & Search ...

integration testing) Participate in code reviews and contribute to engineering best practices Integrate with internal and third-party banking systems and APIs Ensure all development meets security, compliance, and regulatory standards Troubleshoot, debug, and optimise existing applications Required Skills & Experience Strong commercial experience in Java development (Java … working within banking, financial services, or a regulated environment Proficiency with Spring Boot and/or Spring Framework Experience with microservices architecture and RESTful API development Strong understanding of SQL and relational databases Familiarity with CI/CD pipelines and DevOps practices (Jenkins, GitLab, Azure DevOps) Experience with ...

live applications and production environments Technical Skills: Creativity & Problem-Solving Adaptability & Flexibility Able to use AI tooling (CoPilot, Devin, Etc) to accelerate application and API development. Able to guide, analyze, correct, explain, and improve AI output. Aptitude for technology; curiosity, passion and startup mindset Practical application and understanding ...

technical direction within your team Required Skills and Experience Full-stack experience across a selection of JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development & OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL … testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! xcunqrw Please do make an application and we will identify where we can best support your growth specific to your application. ...

advancements in engineering practices, evaluating and recommending innovative solutions as appropriate.• Support the Platform Lead and identify solutions to engineering gaps/challenges.• Facilitate development of cross-functional capabilities to address common gaps/challenges.• Act as key point of contact for engineering decisions from a technical and risk … databases infrastructure capabilities work.• Expertise in infrastructure components, performance tuning, and capacity planning.• Understanding of, and hands on experience of, micro services, software development, infrastructure automation, api development and basic application system’s design.• Strong understanding experience on Site Reliability Engineering, DevOps Capabilities (CI/CD/ ...

make a difference solving the world s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect … with your peers on technical direction within your team Desired Skills and Experience Core Software Engineering JavaScript frameworks (React, NextJS) TypeScript Python Java REST API development OpenAPI/Swagger Cloud & Infrastructure Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Data & Search ...