1 to 25 of 35 API Development Jobs in the South East

NET (C#), Azure Functions, SQL Server, Kafka Relevant Technologies & Tools • Programming Languages: .NET (C#) • Cloud Platform: Microsoft Azure (Azure Functions, Azure Service Bus, Azure DevOps, • ASEv3, Containerisation, K8s, Kafka) • Development Practices: EDA, DDD, K8s, CI/CD pipelines, SOLID principles, REST API • development, Well Architected • Database: SQL Server, Dapper • Tools: Visual Studio, Git, Docker, Azure SDKs Must … Have Qualifications • 10+ years in .NET • Azure DevOps • CI/CD pipelines • SOLID principles • SQL Server • REST API development Nice-to-Have Qualifications • Azure ML, Docker • financial industry experience • experience with design patterns More ❯

Stack Developer to join our dynamic team. If you are passionate about technology and thrive in a collaborative environment, we'd love to hear from you. Requirements Responsibilities Web Development: Develop, test, and maintain robust web applications using PHP and other web technologies. Create and manage backend services and ensure seamless data integration. Front-End Development: Develop user … React, , Angular). Ensure cross-browser compatibility and mobile responsiveness. Database Management: Design and maintain databases (MySQL, PostgreSQL, or equivalent). Optimize database queries and perform routine maintenance tasks. API Development and Integration: Develop and integrate RESTful APIs to enhance application functionality. Work with third-party APIs to integrate additional services. Collaboration: Work closely with designers, developers, and … and Experience: Bachelor's degree in Computer Science, Information Technology, or a related field (preferred). Proven experience as a Full Stack Developer with a strong portfolio of web development projects. Technical Skills: Proficiency in PHP and related frameworks (e.g., Laravel, Symfony). Strong knowledge of front-end technologies (HTML, CSS, JavaScript, and modern JavaScript frameworks). Experience with More ❯

We are currently seeking an experienced Senior Developer to join our established Client Digital Solutions team responsible for the development, implementation, and maintenance of software solutions across both our UK and NL services sectors and our wider international clients. As an experienced Senior Developer, you will become a key member of a core team developing market leading cloud based … digital solutions to our clients. Your Responsibilities: Develop, deploy, test and support cloud applications. Working as part of a dedicated software development team, under the guidance of technical lead members on all aspects of the software development lifecycle Involvement in the development of new external software solutions. Use Microsoft Azure to develop and deploy software solutions in … acceptance criteria are met. Testing and deploying cloud applications using continuous integration, code quality checks and distribution pipelines. Ensuring non-functional requirements including security considerations are met in the development of the solutions. Supporting existing solutions and assisting in their maintenance and support. Providing additional application troubleshooting and support where necessary. Producing suitable end user/technical documentation and More ❯

small team dedicated to optimizing client implementations. Responsibilities Integration Management: Take full responsibility for the integration processes between Luminance and external systems, ensuring seamless interoperability and client satisfaction. Technical Development and Client Engagement: Actively participate in both the hands-on development of technical solutions and client interactions to understand their needs. Collaborate with product development teams and … teams to comprehensively understand client requirements and develop appropriate technological solutions in support of these requirements. Architectural Design: Design and implement scalable architectures that facilitate the rapid and efficient development of new third-party connectors. Ensure the system's interfaces, testing protocols, and designs are robust and future-proof. Monitoring and Diagnostics: Enhance system observability and streamline the diagnosis … of technical issues through advanced logging and tracing capabilities, aiding front-line technical staff. API Development and Management: Oversee the development and maintenance of our public-facing API to cater to clients requiring customized connectivity options. This includes managing both REST and event streaming functionalities. Comprehensive Documentation: Develop high-quality documentation for both internal and external More ❯

data pipeline Optimize and monitor BigQuery operations for cost and performance Establish CI/CD practices as we scale from a dozen clients to 100+ within 12 months Platform Development Build API integrations with MMPs and advertising platforms (Python, REST APIs) Contribute to Django backend for client configuration and monitoring Collaborate with data scientists to productionise ML workflows … Experience with cloud data warehouses (e.g. BigQuery, Snowflake, Redshift) Data transformation tools (e.g. dbt) and data quality frameworks (e.g. Great Expectations) Backend Python frameworks (e.g. Django, FastAPI, Flask) for API development Modern data processing libraries (e.g. Polars, DuckDB) Infrastructure-as-Code (e.g. Terraform, Pulumi) and containerization (e.g. Docker) Open source contributions, or conference talks Ad-tech/mobile More ❯

journey. This role is ideal for someone who is comfortable working with existing technologies while contributing to the modernisation of critical banking systems. The position spans the full software development life cycle, with core technologies centred on Java and React, and suits a developer who values building robust, scalable solutions rather than focusing on the latest trends. The successful … to collaborate closely with Senior Java and React Developers, UI/UX specialists and Agile Transformation functions to help architect and deliver applications in line with best design and development practices. Operating in an Agile/Scrum environment, they will be adept at producing clean, testable and maintainable code and will demonstrate strong analytical skills, technical problem-solving ability … and an understanding of development excellence within the constraints of a regulated banking environment. This role requires full-lifecycle engineering capability, including functional and non-functional analysis, application architecture and design, coding and unit testing, documentation, manual and automated testing, and support for continuous integration, testing and delivery. The developer will also be expected to write Agile epics and More ❯

superb facilities. About the role: Are you passionate about driving digital innovation and building robust, scalable systems? Brockenhurst College is seeking a Senior Systems Developer to lead the design, development, and strategic implementation of software solutions that power our digital infrastructure. Responsibilities as our Senior Systems Developer will include: Lead complex systems development projects aligned with our digital … strategy. Provide technical leadership and mentorship to the development team. Design and maintain software systems, ensuring seamless integrations and top-tier user experience. Champion best practices in security, accessibility, and GDPR compliance. Research and implement cutting-edge tools and technologies. Communicate technical solutions clearly to non-technical stakeholders. As our Senior Systems Developer, youll ideally have: Level 5 IT … or development qualification (or equivalent experience). Strong knowledge of Microsoft .NET, C#, HTML, CSS, JavaScript, and T-SQL. Experience in database design, API development, and system integration. Excellent problem-solving and communication skills. Ability to manage multiple projects and support junior developers. Desirable, Postgraduate qualification or Microsoft Azure certification. Desirable, Experience with MIS platforms, RESTful APIs More ❯

A public sector organisation is looking for a skilled SharePoint Developer to join their Development and Testing team. This is a key role for someone passionate about building high-quality, scalable applications using SharePoint, Microsoft 365, and Azure services. If you enjoy solving complex problems and collaborating across teams to deliver impactful digital solutions, we'd love to hear … governance, and promoting best practices across the organisation. Responsibilities Design and Customize SharePoint Solutions: Develop tailored solutions using SharePoint and M365 product to address specific business requirements Custom SharePoint Development: Create custom SharePoint apps, Teams apps, and web parts using the SPFx framework (React). Additionally, utilize Power Apps, Power Automate, and related technologies. Application Maintenance: Utilize DevOps practices … security of SharePoint environments Configurating and deployment: performing site configuration for new installations, deploying custom features, and staying up to date with the latest SharePoint developments and upgrades. Secure Development Practices: Developing clean, reusable, scalable, and maintainable code following the Software Development Life Cycle (SDLC). Conducting peer code reviews upon request and adhering to development coding More ❯

testing, and implementing modern microservices-based applications running in the public cloud. This is a hands-on position within a feature team that works collaboratively across the full software development lifecycle. What You'll Be Doing Designing, producing, testing, and implementing high-quality software across the system lifecycle Working within a permanent feature team focused on delivering business-critical … in a fast-paced Agile environment (two-week sprints) Collaborating with architects, principal engineers, and key stakeholders to align technical solutions with business objectives Applying Agile and Test-Driven Development (TDD) principles to build resilient, fast-running, and maintainable code Building and maintaining API-driven Java microservices hosted on public cloud infrastructure Contributing to intentional architecture while supporting … Proven ability to design and deliver well-tested, production-ready software with strong focus on functional and non-functional requirements Deep understanding of microservices architecture, cloud-native applications, and API development Experience with distributed systems - managing workloads at scale using modern practices for availability, performance, and observability Knowledge and experience with Test-Driven Development (TDD) and automated More ❯

As an Application Developer your responsibilities will be to: Maintain and enhance existing in-house applications Develop new features and tools to agreed requirements Scope, estimate, schedule, and communicate development work Ensure solutions comply with IT security and ISO27001 standards Identify and deliver system improvements Collaborate with the Senior Developer and wider data team Too be successful as the … Application Developer you will need: C#, .NET Core, OO development, repository pattern, unit testing Windows Forms experience Strong MS SQL Server skills (T-SQL, stored procedures, functions) Database design and development Git or similar source control Debugging, problem-solving, writing documentation PowerShell scripting, API development Microsoft Access (structure, design, VBA) SSRS, SSIS Excel (Power Query, formulas … VBA) Power BI Beneficial: web development Strong communication, time management, and analytical skills Ability to manage small medium development projects Quick learner, self-motivated, strong team player Ability to support and guide others Helpful: knowledge of Data Protection principles To achieve the higher salary, you will need to demonstrate your ability to meet the key criteria s of More ❯

As an Application Developer your responsibilities will be to: Maintain and enhance existing in-house applications Develop new features and tools to agreed requirements Scope, estimate, schedule, and communicate development work Ensure solutions comply with IT security and ISO27001 standards Identify and deliver system improvements Collaborate with the Senior Developer and wider data team Too be successful as the … Application Developer you will need: C#, .NET Core, OO development, repository pattern, unit testing Windows Forms experience Strong MS SQL Server skills (T-SQL, stored procedures, functions) Database design and development Git or similar source control Debugging, problem-solving, writing documentation PowerShell scripting, API development Microsoft Access (structure, design, VBA) SSRS, SSIS Excel (Power Query, formulas … VBA) Power BI Beneficial: web development Strong communication, time management, and analytical skills Ability to manage small–medium development projects Quick learner, self-motivated, strong team player Ability to support and guide others Helpful: knowledge of Data Protection principles To achieve the higher salary, you will need to demonstrate your ability to meet the key criteria’s of More ❯

you will be instrumental in designing, developing, and maintaining robust and scalable full-stack applications that power our automation and SaaS platforms. You will work across the entire software development lifecycle, from concept to deployment, collaborating closely with product managers, designers, and other engineers to deliver high-quality, impactful solutions. Design, develop, and implement highly performant and scalable full … microservices. Develop responsive and intuitive front-end user interfaces. Collaborate with product management to understand requirements and translate them into technical specifications. Participate in all phases of the software development lifecycle, including planning, design, coding, testing, deployment, and support. Write clean, maintainable, and well-documented code following best practices. Implement and maintain automated tests (unit, integration, and end-to … frameworks (e.g., Hibernate, JPA). Solid understanding of front-end technologies such as HTML, CSS, JavaScript, and modern JavaScript frameworks (e.g., ReactJS, MobX and TypeScript). Experience with RESTful API design and development. Familiarity with cloud platforms (e.g., AWS, Azure, GCP) and containerization technologies (e.g., Docker, Kubernetes). Experience with version control systems (e.g., Git and Jira, BitBucket, Bamboo More ❯

join our AI team. The ideal candidate will have expertise in retraining and fine-tuning LLMs using proprietary datasets to build a conversational chat bot. Tasks Key Responsibilities: Model Development: Retrain and fine-tune existing Large Language Models (LLMs) using proprietary datasets to meet specific business requirements. Data Integration: Work with data engineers and data scientists to curate, preprocess … with business goals. Deployment: Assist in deploying LLMs into production environments, ensuring robust and scalable AI solutions. Requirements Qualifications: Experience: 3-5 years of experience in AI/ML development, with a focus on working with Large Language Models (e.g., GPT, BERT, Hugging Face, etc.). Education: Bachelor's or Master's degree in Computer Science, Artificial Intelligence, Data … AI, sentiment analysis, or recommendation systems. Knowledge of model interpretability techniques and responsible AI practices. Familiarity with MLOps pipelines for continuous integration and deployment of AI models. Experience with API development and integration for deploying AI services. Prior experience in working with proprietary or sensitive data. Benefits What We Offer: Competitive Salary: Based on experience and expertise. Professional More ❯

BPSS to start; active SC required due to timescale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary focus), Python experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence … to technical standards Approach: Pride in producing high-quality, well-documented code Ownership of the full development process Collaborative working with user-centered design (UCD) teams Thrives in small, agile, multi-disciplinary teams Key Responsibilities: Develop Ruby-based applications and data services Build and maintain APIs and open data platforms Ensure code is high-quality and well-documented Work … For: Senior Ruby developer with strong focus on code quality Experience working with data services Comfortable working in small, agile teams and collaborating with UCD teams Desirable Skills: Python development Experience in public sector or government projects Knowledge of search technologies and open data platforms Active SC clearance More ❯

Expertise in Backend Development: Strong proficiency in , TypeScript/JavaScript best practices, along with experience in at least one other server-side language. Database Mastery: You're a SQL guru, particularly with PostgreSQL, handling query optimization, data migrations, and database modeling. Solid Grasp of OOP and Design Patterns: Strong understanding of object-oriented programming principles and design patterns, with … scalability, ensuring they manage rapid growth and increasing demands efficiently. High-Volume Performance: Proven expertise in optimizing systems for large transaction volumes, handling concurrency, idempotency, and performance under load. API Development: Skilled in building APIs, including input validation, JWT tokens, and ensuring security & scalability through queue-based systems. Experience: at least 8 years of experience as a Software … Engineer. You're the Engineer We're Looking for if You: Excel in Application Development: You thrive in designing, coding, testing, and maintaining applications using the tech stack mentioned above. Thrive in Remote Collaboration: Excel in a remote-first environment with proactive communication and strong asynchronous collaboration skills to ensure alignment and effective teamwork. You've successfully worked in More ❯

ideal for someone who enjoys solving complex technical challenges and wants to make a real impact in a creative, forward-thinking environment. Experience Strong knowledge and experience in integration development, with a specific focus on MuleSoft Anypoint platform. Strong knowledge of API development, integration patterns, and data transformation using DataWeave. Proficiency in Java and JavaScript; experience with … GitHub and CI/CD tools (e.g. Jenkins, Azure DevOps). Familiarity with enterprise systems integration (e.g. Salesforce, Moodle) and protocols (REST, SOAP, JMS). Understanding of API security standards (OAuth 2.0, SAML, encryption). UAL is a world-class University shaping the creative industries worldwide, with staff having access to a range of benefits, training and personal development More ❯

BPSS to start; active SC required due to timsecale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Python development (primary focus), Ruby experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence … to technical standards Approach: Pride in writing high-quality, well-documented code Ownership of the full development process Collaborative working with user-centered design (UCD) teams Thrives in small, agile, multi-disciplinary teams Key Responsibilities: Develop Python-based applications and data services Build and maintain APIs and open data platforms Ensure code is of high quality and well-documented More ❯

or research value. Lead model experimentation, evaluation, and creative prototyping. Implement and extend recent AI/ML research into functional systems. Operate across the stack: data pipelines, model training, API development, and intuitive interfaces. Introduce new tools, frameworks, and research directions to the team. Foster a culture of speed, curiosity, and experimentation. Enjoy autonomy, ownership, and creative freedom … feature extraction. Proficiency in Python and libraries such as PyTorch, TensorFlow, scikit-learn, Hugging Face, LangChain, and OpenAI/Anthropic APIs. Familiarity with DevOps & tooling (Git, CI/CD, API integration), front-end & visualization (Streamlit, Gradio, React), and cloud environments (AWS/GCP/Azure). Experience with vector and graph databases (Pinecone, FAISS, Neo4j). Understanding of model … drive for impact. And in return, Savanta offers: Salary range: £65,000 - £75,000 Bonus scheme Unlimited annual leave Hybrid working Flexible working practices Health & wellbeing package Ongoing Learning & Development Financial health (pension, life assurance, etc.) Team & Company Socials Committees for Health & Well Being, Charities & Volunteering and DE&I Why Join Us: Savanta was founded on the belief that More ❯

with strong expertise in Python and modern backend systems to design, build, and optimize scalable, secure, and high-performance applications. The ideal candidate will bring hands-on experience in API development, databases, and cloud infrastructure, combined with a passion for delivering clean, well-tested, and maintainable code. This role is open globally to full-time contractors who can … to architectural decision-making and promote best practices in testing, security, and performance. Partner with frontend engineers, product managers, and designers to deliver end-to-end solutions. Foster the development of junior engineers through guidance, knowledge exchange, and structured onboarding support. Own the full backend lifecycle - from initial design to deployment and ongoing monitoring. Requirements 3+ years of professional … distributed systems. Familiarity with modern backend architectures (e.g., microservices, event-driven design). Excellent communication skills in English, with the ability to collaborate across functions. Experience using AI-assisted development tools (e.g., Cursor AI) to enhance productivity, code quality, and collaboration. Thrives in a fast-moving startup environment - flexible, proactive, and self-directed. If you meet the requirements above More ❯

Cloud Security Engineer/Developer (AWS) - Node.js/NestJS and REST API - Authentication (Auth0, Ping Identity) Permanent, up to £88,000 + package ***Hybrid - 3 days office Leading financial services client is seeking a Senior Cloud Security Engineer and help shape their cybersecurity in a fast-paced, global environment. Key Responsibilities: Design and maintain RESTful APIs and microservices using … Embed DevSecOps best practices across IAM, networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Proficient with IaC, CI/CD (CloudFormation, Terraform) Cloud security principles, including IAM, networking, and encryption If this is of interest and you More ❯

Cloud Security Engineer/Developer (AWS) - Node.js/NestJS and REST API - Authentication (Auth0, Ping Identity) Permanent, up to £88,000 + package ***Hybrid - 3 days office Leading financial services client is seeking a Senior Cloud Security Engineer and help shape their cybersecurity in a fast-paced, global environment. Key Responsibilities: Design and maintain RESTful APIs and microservices using … Embed DevSecOps best practices across IAM, networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Proficient with IaC, CI/CD (CloudFormation, Terraform) Cloud security principles, including IAM, networking, and encryption If this is of interest and you More ❯

developer) and an infrastructure specialist – your ideas won’t just be heard, they’ll shape the future. Tech-Forward Culture: Embrace AI-assisted coding and testing tools to accelerate development, testing and deployment. A Breadth of Exciting Projects: From AI-powered analytics and Bluetooth tracking to route optimization and custom API development, you’ll be solving real … on, stored procedures, DB design & maintenance) Strong experience with RESTful APIs, JSON and app integrations Git version control (or similar) HTML & CSS PowerBI reporting What You Bring Full software development lifecycle experience, including testing and documentation Strong debugging skills and a commitment to clean, maintainable code Effective communicator, with both technical and non-technical audiences Ability to work independently … support experience Salary & Benefits -Salary: £40–51K basic + annual bonus (currently £4.5–6K), based on company performance -28 Days Annual Leave -Life Assurance & Stakeholder Pension -Ongoing technical & personal development training -Flexible Working Hours (start from 7am if you wish) -They plan to move to a 4-day week, every other week, from next year -A Purpose-Driven Culture More ❯

teams, with responsibility not just for delivery but also for mentoring peers, shaping design decisions, and contributing to long-term planning and technical standards. What you'll need: SPA development experience using JavaScript and TypeScript Proficiency in both Vue.js (v3) and Nuxt.js HTML5, CSS3+, Tailwind, and responsive design implementation CSS pre-processors (SASS, SCSS) and build tools (Vite, Webpack … PrimeUI, Axios, GitHub or equivalent version control Experience with MSAL and single sign-on (SSO) REST-based API development UI/UX, accessibility (WCAG/WAI), and usability standards Wireframing, prototyping, and high-fidelity mock-ups Use of Figma, Sketch or Adobe XD Testing tools such as Cypress, Mocha, Jest, Selenium, Playwright, Docker, Postman Experience in Agile and … and strategically valued team Hybrid structure with two remote days per week Involvement in architectural design, estimation and mentoring responsibilities Scope to evaluate new technologies and directly shape future development approaches Apply now More ❯

Solutions Architect (Integration | API Design) St Albans (Hybrid) Compensation: £95,000 +Bonus +Equity Method Resourcing are proud to be partnering with a fast-growing, international technology business delivering critical services across multiple high-reliability sectors. They're seeking a Solutions Architect to lead the end-to-end technical design of mission-critical platforms and services. The Role: We're … disparate systems, and overseeing their seamless migration to a new, unified platform - ensuring zero downtime throughout. In addition, you'll lead the standardisation of tooling, practices, and documentation across development teams, establishing a single source of truth to drive consistency and quality in solution delivery. Key Responsibilities: Own and deliver end-to-end architecture across microservices, APIs, message buses … emerging technologies What We're Looking For: Proven experience in Solution Architecture or Solution Design, ideally in environments involving systems consolidation or major technology transformations Proficiency in cloud platforms, API development, message buses, DevOps practices, and languages such as C#, Python, or PHP Ability to clearly document and present architecture decisions, trade-offs, and constraints to technical and More ❯

and/or Solutions Designer(s) to ensure understanding of business requirements on larger delivery items. Key Skills & Experience Proven experience as a Software Developer . Strong expertise in API development and service integration . Proficiency in C# and the .NET framework . Solid understanding of SQL databases, including performance tuning and query optimization. Knowledge of Azure Devops More ❯