24 of 24 API Development Jobs in the South East

experienced Senior Full Stack Engineers to join a high-performing engineering team building and enhancing modern enterprise applications. This is a hands-on development role for engineers who enjoy working across the full technology stack, delivering scalable web applications, cloud-native services, and modern user experiences. The successful candidate … will have strong Java and Front End development experience, a passion for software engineering best practices, and experience working within Agile delivery teams. Key Responsibilities Design, develop and maintain scalable enterprise applications. Build modern Front-End applications using React (preferred) or Angular. Develop secure and performant backend services using ...

critical systems Contribute to modernization of mainframe-based systems toward scalable, cloud-aligned architectures Maintain and enhance COBOL/DB2-based applications Advance distributed, API-driven, and event-based solutions Lead and mentor engineering teams and ensure adherence to team standards Ensure accurate, high-quality documentation and engineering deliverables … process strategies and standards Lead data assets within an Agile team according to enterprise standards and policies Spend approximately 50% of time on database development and testing and the remainder collaborating with partners on product/platform releases Collaborate with business, product, architecture, engineering, and delivery teams Prioritize sprint ...

supporting the team's transition from Power BI to Databricks and building out a broader data and application capability. The role combines full-stack development, data visualisation and API development, with experience across Databricks, Python, web development and APIs being particularly relevant. You'll be involved … designing and developing the technical infrastructure and API layers that sit behind applications, as well as proof-of-concept and early-stage solutions. A key part of the role will be technical leadership without direct people management - mentoring and upskilling a relatively junior team, helping establish best practices around ...

technical discussions. Collaborate with Product Management, DevOps, Quality Assurance, security specialists and other developers to manage dependencies and support iterative delivery. Apply secure development, data‐handling and responsible AI practices, including appropriate verification of AI‐assisted outputs and use of approved tools and accounts. Share knowledge with colleagues, contribute … practical improvements within the team’s scope. Degree in Computer Science, Software Engineering or a related discipline, or equivalent practical experience. Relevant professional software development experience delivering production code within a collaborative engineering environment. Practical development of web services, microservices or REST APIs using Python or a comparable ...

technology solutions that support critical post-trade and asset servicing operations across global financial markets. You will play a key role in the design, development and enhancement of enterprise-grade applications used to manage complex asset servicing processes, corporate actions, income processing, custody operations and client reporting. Working within … reviews and provide technical mentorship to junior developers. Troubleshoot production issues and support platform stability, resilience and performance improvements. Drive continuous improvement in software development processes, automation and deployment practices. Ensure solutions adhere to security, regulatory and operational standards required within financial services. About You 5+ years' commercial software ...

Application Development & Integration Full-stack software engineering expertise across Java, Python, .NET, JavaScript/TypeScript, Node.js, React, Angular, and modern web technologies. Deep experience in API development, Microservices, Event-Driven Architectures, Enterprise Integration, and Distributed Systems design. Cloud, Platform Engineering & Infrastructure Expertise in Azure ...

looking for a Senior Software Engineer with proficiency in C# programming to lead the development of the IoT device software and cloud platform software for our connected energy storage systems. The successful candidate will be responsible for the development and maintenance of communications and cloud backend … work collaboratively to solve problems The Role We are looking for a Senior Software Engineer with proficiency in C# programming to lead the development of the IoT device software and cloud platform software for our connected energy storage systems. The successful candidate will be responsible for the development ...

outcomes without dependency on external PMs Ensure outputs are production-ready, maintainable, and observable from day one Apply AI and automation tooling to accelerate development, testing, and operations Integrations & API Development Both independently and via 3rd Party Engineering team Integrate third-party services, for example payment processors …/KYB providers, fraud platforms, and banking APIs Build and maintain robust API layers including validation, orchestration, and workflow logic Implement secure, PCI-aware designs aligned with payments industry expectations Data & Infrastructure Design and maintain data pipelines and reporting structures using AWS native tooling Apply high availability and fault ...

demanding scientific and industrial applications. This is a hands-on position offering the chance to work across the full product lifecycle, from software development and system integration through to testing, production support and continuous product improvement within a multidisciplinary engineering environment. Key responsibilities for the Senior Software Engineer role … Develop SQL queries, reporting solutions and system integrations to support engineering and business processes. Provide technical leadership and guidance to junior engineers. Manage multiple development projects while ensuring high-quality delivery. Key skills required for the Senior Software Engineer role based in Surrey, onsite: Degree qualified in Software Engineering ...

demanding scientific and industrial applications. This is a hands-on position offering the chance to work across the full product lifecycle, from software development and system integration through to testing, production support and continuous product improvement within a multidisciplinary engineering environment. Key responsibilities for the Senior Software Engineer role … Develop SQL queries, reporting solutions and system integrations to support engineering and business processes. Provide technical leadership and guidance to junior engineers. Manage multiple development projects while ensuring high-quality delivery. Key skills required for the Senior Software Engineer role based in Surrey, onsite: Degree qualified in Software Engineering ...

commercial experience building production web applications using TypeScript and React, with a clear bias toward backend development. * Node.js Proficiency: Strong background in backend architecture, API development, and system logic. * Solid SQL Skills: Hands-on experience working with relational databases and query optimization. Desirable: * Background in Financial Services ...

FinTech business, the role is hybrid - 1 day per week in the office. Key technical requirements; Proven hands-on website, mobile app support and development experience (ideally Angular or Big Commerce) Proven hands-on API development or support experience ETL tools experience Hands-on Azure ADF, logic … function app, storage accounts development or support experience Hands-on Mobile middleware, IIS solution development, or support experience Experience in SSIS packages support, DB clustering set up, DB, SSIS upgrades, DB performance tuning. Experience in setting up monitoring and alerting using any monitoring tools e.g. spotlight, solarwinds etc. ...

ambitious team where you will have genuine ownership and visibility across the business. YOUR SKILLS AND EXPERIENCE: You will bring strong capability in: Python development AWS services including Lambda, EC2, CloudWatch and RDS SQL and database development, ideally with PostgreSQL Building, deploying and maintaining end-to-end production … pipelines API development, integration and monitoring within live environments Experience within Lending, FinTech, Banking or Financial Services THE BENEFITS: You will receive a salary of up to £70,000 depending on experience, along with the opportunity to take ownership of a critical function within a rapidly scaling FinTech ...

enhancing APIs, automated processes and data workflows. Cleansing, transforming and loading data into CRM and data warehouse environments. Supporting the implementation and ongoing development of Microsoft Fabric. Designing and maintaining scalable Azure-based data solutions. Building reporting solutions using Power BI and other BI tools. Working closely with stakeholders … Fabric transformation programme. Opportunity to work on projects that deliver meaningful outcomes. Collaborative and supportive team culture. Excellent work-life balance. Long-term career development opportunities. Opportunity to influence the future direction of data, reporting and business intelligence across the organisation. Key Experience To be successful in this role ...

Security Agents AWS Neptune, RDF, SPARQL, Semantic Knowledge Graphs SLM/LLM fine-tuning Anthropic MCP (Model Context Protocol) MuleSoft APIs, Fivetran APIs & custom API development Microsoft Copilot Studio & Agent Builder Performance tuning & concurrent workstreams Security policies & roles Desirable: Collibra, Immuta ...

technology company in Oxford is seeking a Senior Software Engineer to lead the development of IoT device and cloud platform software. The role involves developing and maintaining C# codebases, API development, and collaboration with technical teams. Ideal candidates will have 8 years of C# experience, familiarity with ...

supporting modern digital services. This is a hands-on engineering role where you will work across the full technology stack, contributing to the design, development, testing and ongoing support of web applications and digital services. You will work within a multidisciplinary product team and collaborate with product managers, business … planning, backlog refinement, stand-ups, reviews and retrospectives. Identify and communicate delivery risks and technical issues at an early stage. Use modern AI-assisted development tools to improve coding, testing, debugging and documentation workflows. Work collaboratively with technical and non-technical colleagues to understand requirements and develop practical solutions. ...

Provide technical leadership across SAP integration projects and initiatives. Design, prototype, and implement automation solutions that improve integration delivery. Identify opportunities to streamline SAP development, integration, testing, and deployment processes. Work closely with SAP delivery teams to ensure solutions are practical, scalable, and deliver measurable value. Lead technical proof … concepts and rapid innovation initiatives to evaluate new tools, technologies, and ways of working. Drive adoption of AI-assisted development, automation, and modern engineering practices. Define and measure key performance metrics to demonstrate improvements in delivery speed, quality, and efficiency. Produce technical recommendations, demonstrations, and business cases to support ...

week in the office. Key technical requirements; Proven hands-on Angular or Bigcommerce (or similar) website, mobile app support experience Proven hands-on API development or support experience Proven hands-on Azure ADF, logic app, function app, storage accounts development or support experience Proven hands-on Mobile … middleware, IIS solution development, or support experience Proven hands-on experience in SSIS packages support, DB clustering set up, DB, SSIS upgrades, DB performance tuning. Experience in setting up monitoring and alerting using any monitoring tools e.g. spotlight, solarwinds etc. Power BI and MS fabric experience optional Key responsibilities ...

prem, hybrid and restricted environments. You will design production architectures for agentic AI, LLM and vision‐language apps. The role requires strong Python, API development, Docker, cloud deployments, and secure, observable production systems. You will build connectors, CI/CD, monitoring, and ensure reliability, performance and cost efficiency ...

FinTech business, the role is hybrid - 1 day per week in the office. Key technical requirements; Proven hands-on website, mobile app support and development experience (ideally Angular or Big Commerce) Proven hands-on API development or support experience ETL tools experience Hands-on Azure ADF, logic ...

focused on building a new platform that sits above its existing search technology stack. The project will involve creating a lightweight abstraction layer and API architecture that simplifies the user experience, whilst providing a foundation for future search platform evolution. This is an opportunity to work on a greenfield … quality solutions. Key responsibilities include: Designing and developing .NET Core services and APIs Building abstraction layers between front-end applications and search technologies Developing API services Working with Azure cloud services Designing and maintaining SQL databases Collaborating with senior stakeholders and engineers to refine requirements Contributing to architecture ...

week in the office. Key technical requirements; Proven hands-on Angular or Bigcommerce (or similar) website, mobile app support experience Proven hands-on API development or support experience Proven hands-on Azure ADF, logic app, function app, storage accounts development or support exp click apply for full ...

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 ...