1 to 25 of 32 Permanent API Development Jobs in the South East

seasoned AI expert ready to take your skills to the next level? Do words like Azure OpenAI, Cognitive Services, prompt engineering, Retrieval-Augmented Generation (RAG) architectures, vector stores, and API integrations make you light up inside? If so, we want to hear from you! At 1st Central , we're on an exciting journey with AI and Generative AI - and … s about bringing smart ideas to life and making a real impact. You'll be at the heart of our AI strategy - from initial concept and prompt design, through development and testing, to deployment, production, monitoring and continuous improvement optimising cutting-edge AI solutions across the business. One day you might be collaborating with our Data Scientists, Software Engineers … or save time-and you know how to turn those ideas into working solutions. What's involved: Lead the design and implementation of AI engineering frameworks and standards, emphasising API integrations, Azure infrastructure, and Azure security & networking. Architect and develop AI and Generative AI solutions using services like Azure OpenAI and Azure Cognitive Services Implement prompt engineering techniques and More ❯

cloud services, Terraform, and Airflow. Building and maintaining both the frontend and backend of our core product, ensuring seamless user experiences and high performance. Implementing DevOps practices to streamline development workflows, automate deployments, and ensure continuous integration and continuous delivery (CI/CD) via Gitlab. Collaborating closely with the product team to translate user needs and business requirements into … best practices and industry standards. Troubleshooting and resolving technical issues, ensuring the smooth operation of our platform. Staying up-to-date with the latest technologies and trends in web development, DevOps, and the space industry. Growing with us! As an early team member, you'll have the opportunity to contribute to all aspects of the development process and … AWS, Azure, GCP) Proficiency in front end e.g., React, Angular, Vue.js and frameworks such as e.g., Node.js or FastAPI. Experience with databases such as MongoDB and MySQL. Familiarity with API design and development, including serverless technologies, e.g. AWS ECS/API Gateway/Lambda. A passion for space technology and a genuine interest in the space sector More ❯

systems. Stay current with industry trends, tools and best practices. Contribute to peer code reviews and promote quality throughout the team. Candidate Profile: Minimum of 2 years of software development experience, particularly in C# . Familiarity with cloud development using Azure Experience with API development, Azure Functions and Windows Services. Front-end development skills in … Discretionary performance-based bonus. 25 days’ annual leave plus bank holidays. Pension Scheme. SimplyHealth health cashback plan. 24/7 Private GP access. Flexible working arrangements. Ongoing Training and Development opportunities. Salary sacrifice Electric Vehicle (EV) scheme. Discounts on Lightwave RF smart home products. Opportunity to work with the latest cloud technologies on impactful energy infrastructure projects. A dynamic More ❯

equipment's performance and deliver treatment with precision and confidence. Your responsibilities will include but are not limited to: Demonstrate solid software engineering skills in all aspects of the development life cycle: Participate in technical design discussions. Contribute to architecture and design documents. Develop and maintain full stack application components and services. Implement automated tests as part of the … be assigned as required. Identify and discuss improvements to process and the team's way of working. Ensure that all products and documents are developed in accordance with the development process. Required experience: Bachelor's degree in Computer Science or STEM. Development experience with C# .NET 8 (and above). Development experience with web-based applications. Fluent … in English with strong communication skills (verbal and written). Strong quality culture. Be knowledgeable in our core and perspective tech: C#/.NET, Java, Spring, Backend API development, Angular, JavaScript, Bootstrap. Experience with Azure DevOps and CI/CD pipelines. Experience with Unit Testing Frameworks. Experience with test automation, e.g. Cypress Experience with API test automation More ❯

equipment's performance and deliver treatment with precision and confidence. Your responsibilities will include but are not limited to: Demonstrate solid software engineering skills in all aspects of the development life cycle: Participate in technical design discussions. Contribute to architecture and design documents. Develop and maintain full stack application components and services. Implement automated tests as part of the … be assigned as required. Identify and discuss improvements to process and the team's way of working. Ensure that all products and documents are developed in accordance with the development process. Required experience: Bachelor's degree in Computer Science or STEM. Development experience with C# .NET 8 (and above). Development experience with web-based applications. Fluent … in English with strong communication skills (verbal and written). Strong quality culture. Be knowledgeable in our core and perspective tech: C#/.NET, Java, Spring, Backend API development, Angular, JavaScript, Bootstrap. Experience with Azure DevOps and CI/CD pipelines. Experience with Unit Testing Frameworks. Experience with test automation, e.g. Cypress Experience with API test automation More ❯

new asset management system—and they’re looking to bring experienced Back-End or Full Stack Developers on board to drive this transformation. As a key part of the development team, you’ll be involved in architecting and delivering robust, scalable backend solutions using PHP (Laravel), MySQL, and modern frontend technologies. You’ll be joining a collaborative and agile … environment where autonomy and technical input are both valued and encouraged. What you’ll be working with: PHP (Laravel) and MVC frameworks MySQL Backend API development (REST) HTML, CSS, JavaScript, Bootstrap Vue.js or similar JavaScript frameworks Azure DevOps, CI/CD pipelines Linux-based environments What we’re looking for: 6+ years’ experience in a full stack or … React, Node.js, Angular, or additional modern JS frameworks This is an exciting opportunity to work on a greenfield project with long-term impact, using a modern stack and best development practices. On offer is a salary of £70,000 plus excellent benefits, flexible working, and the chance to be part of something genuinely rewarding. Interested? Apply now or get More ❯

new asset management system—and they’re looking to bring experienced Back-End or Full Stack Developers on board to drive this transformation. As a key part of the development team, you’ll be involved in architecting and delivering robust, scalable backend solutions using PHP (Laravel), MySQL, and modern frontend technologies. You’ll be joining a collaborative and agile … environment where autonomy and technical input are both valued and encouraged. What you’ll be working with: PHP (Laravel) and MVC frameworks MySQL Backend API development (REST) HTML, CSS, JavaScript, Bootstrap Vue.js or similar JavaScript frameworks Azure DevOps, CI/CD pipelines Linux-based environments What we’re looking for: 6+ years’ experience in a full stack or … React, Node.js, Angular, or additional modern JS frameworks This is an exciting opportunity to work on a greenfield project with long-term impact, using a modern stack and best development practices. On offer is a salary of £70,000 plus excellent benefits, flexible working, and the chance to be part of something genuinely rewarding. Interested? Apply now or get More ❯

rebuild their software environment. This role is central to developing web-based applications and systems that support strategic business goals. The ideal candidate is highly skilled in Azure cloud development, experienced in Agile and DevOps environments, and capable of leading development teams. Duties and Responsibilities: Software development, evaluating and improving codebases. Implement long-term development strategies … with incremental improvements. Lead and mentor software engineers to enhance performance. Refine development processes, tools, and standards for efficiency and quality. Manage competing priorities and make decisions under pressure. Collaborate with technical and non-technical stakeholders. Stay updated on industry standards, including version control, code reviews, testing, and CI/CD. Apply Agile methodologies in development practices. Required … Skills: Extensive software development experience with a proven record of improving codebases. Skilled in C#, .NET, Azure, and SQL. Strong background in API development and provider application implementation. Capable of shaping long-term strategies while managing incremental improvements. Proven leader with experience mentoring teams and driving performance. Experienced in optimising development tools, processes, and standards. Strong More ❯

focused approach. Overview: Were hiring on behalf of our client for a Product Engineer (backend C# .net core) to join their growing team. The role will focus on backend development for a platform that blends telephony, voice AI, and LLMs to create next-generation voice automation features. Youll play a key role in building core product functionality, from low … the future). Write performant SQL for PostgreSQL databases; help design schemas and queries. Build and manage WebSocket connections for real-time features. Build clean automation tests (unit, functional, API). Build minimal UI components using Blazor SSR (checkboxes, graphs ..etc). Assist with deployment using Docker (containerisation) and AWS (EC2, RDS). Integrate with telephony and AI services … experience with C# (.NET Core) in Linux-based production environments. Comfortable navigating ambiguity and working with minimal supervision. Strong SQL knowledge, with experience using PostgreSQL in live systems. REST API development experience; understanding of JWT and cookie-based auth. Familiarity with Docker and AWS services, from a developer perspective. Comfortable with WebSockets. Comfortable with building lightweight frontends in More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

you'll be at the core of AI infrastructure. Key Requirements: Expert in Python, ML/AI frameworks (PyTorch, TensorFlow, Hugging Face) Proven MLOps, big data, and backend/API development experience Deep understanding of NLP and LLMs Proficient with cloud platforms (AWS/GCP/Azure), Airflow, DBT, Docker/Kubernetes Strong collaboration, problem-solving, and coding More ❯

equivalent higher education) in Information Technology, Data Engineering, or a related field; Proven experience working with enterprise accounting software and/or private equity/investment management software integrations. API Integration experience with MuleSoft and/or API Development experience. Experience in system configuration, customization, and integration of financial applications. Investran or similar platform certifications beneficial. Good … working knowledge of Accounting Platform database structures and data models. Proficiency in SQL and data query languages to extract and manipulate data. Experience beneficial in Object Oriented language development, including integrations with SOAP and REST based APIs. Familiarity with reporting and analytics tools, Qlik, Microsoft Excel, Power BI, Synapse, Snowflake or similar. Self-motivated, proactive, with a strong sense More ❯

adapting to rapidly changing requirements. • Work in an environment that values pragmatic, delivery-focused problem solving and continuous learning. Required qualifications to be successful in this role • Java Microservices Development: Proven experience in building and testing Java microservices. • RESTful API Development: Recent hands-on experience with developing APIs using OpenAPI and JSON. • Teamwork & Communication: Strong team working More ❯

is expanding their technology team and seeking an experienced Cloud Integration Developer to join them for a 12-month contract. Role Overview: As part of their growing in-house development team, you'll define, design, and develop new features and capabilities, focusing on cloud services and architectures. The role involves creating tools and apps that enhance their data platform … directly impacting member experiences and back-office processes. Key Responsibilities: Designing scalable cloud architectures for workflow automation Integration of CRM, Finance, and other SaaS products Development of microservices and event-driven architectures Maintaining and improving our current tech stack Technical Requirements: 6+ years' experience in complex, multi-platform environments Strong background in Azure cloud architecture and deployment Proficiency in … TypeScript and Node.js Experience with enterprise middleware technologies Knowledge of API development and management P ackage & Working Pattern: Salary up to £80,000 per annum Performance-related bonus Comprehensive benefits package 2 days in our London office Fixed-term contract (12 months) Their approach is agile and data-driven, emphasizing collaboration within a cross-functional product team. #CloudComputing More ❯

Developer is responsible for building new functionality and supporting existing functionality across Focus Group's portfolio of internal applications and services. This role involves working closely with the internal development team to develop set deliverables that are fit for purpose. Principal Responsibilities/Duties Develop change requests and fixes on Focus Bespoke CMS and CRM applications. Write unit tests … and collaborate with the QA Analyst to ensure new developments meet acceptance criteria. Participate in support desk activities on a rota basis for development-related issues. Contribute to projects as required by the business. Engage actively in standups, team meetings, and planning sessions. Essential Skills Strong ability in writing unit tests. Understanding of Javascript, JQuery, Vue.js. Experience using SQL … preferably MariaDB/MySQL). Proficiency in HTML5/CSS/Bootstrap and Laravel. Knowledge of API Development/PostMan. Experience with Git version control and branching. Ability to build meaningful relationships with colleagues. Proven experience in a similar role. Customer-focused with a desire to understand and meet customer requirements. Experience in the software development lifecycle. More ❯

pricing teams in order to help support maturation of analytics practice within the organization. Write high quality python code using industry best practice for model training and deployment Continuous development of knowledge base and experience, including researching new techniques and technologies, communicating this back with the team Skills criteria Experience of data science, advanced analytics or a genuine interest … mining) used to draw key business insights and clearly articulate findings for target audience Exceptional written communications skills and effective presentation skills Willingness to learn best practice in software development Strong python programming skills Experience of TDD (pytest or other testing framework) Desirable skills Graduate or Postgraduate qualification or equivalent experience in a relevant discipline e.g. engineering, mathematics, physics … insurance or Ecommerce is an advantage but not required Experience of deployment in a cloud environment Experience with neural networks and Tensor Flow, CatBoost, XGBoost, SKlearn, Pandas Experience with API development SQL experience Software engineering experience DevOps/MLOps experience Good working understanding of CI/CD If you hold the experience and technical skills outlined above which More ❯

Software Developer in Canterbury, Kent (office-based) Salary: £40,000 – £45,000 depending on experience Do you have skills in C#, JavaScript, and SQL? Do you enjoy API development—both writing and consuming—as part of a wider full-stack role? Would you like the opportunity to work in an office-based role where you can closely collaborate … a competitive edge in the telecom and energy sectors. As part of their expansion, they are now looking to onboard a Full Stack Developer to join their friendly, collaborative development team. You will have the chance to work across the full stack, with a particular focus on API development—both writing and consuming—and be involved in … the full software lifecycle, from design to delivery. What you will be doing: Designing and developing software applications using .NET and C# Contributing to both backend and frontend development Creating, consuming, and integrating APIs Collaborating with the team to add new features and fix bugs Staying current with new technologies and suggesting improvements Supporting clients and ensuring the successful More ❯

Solutions Architect (Integration | API Design) St Albans (Hybrid) Compensation: Salary +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 seeking … 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 ❯

ll bring: Extensive experience with PHP and the Laravel framework . A strong understanding of object-oriented programming (OOP) principles. Proficiency with database technologies (e.g., MySQL). Experience with API development and integration. Knowledge of version control systems (e.g., Git). A problem-solving mindset and the ability to work independently and as part of a team. Excellent … a large user base. A hybrid working model offering excellent flexibility with a bias towards being home-based A collaborative and supportive team environment. Opportunities for professional growth and development . A competitive salary and benefits package. You must have full eligibility to work in the UK, as they are unfortunately unable to provide work permit sponsorship. If you More ❯

with some PHP, whos passionate about building powerful systems, automating workflows, and turning ideas into real-world solutions. This is a standalone role where you will be the sole development expert and have a key responsibility in generating ROI from the work that you do. You will be an integral part of the business as they aim to drive … increased revenue and workflow from your ideas Responsibilities Microsoft 365 Platform Development: Enhance and expand their use of Dynamics 365, integrating it with their software via APIs. Data Visualization: Build interactive dashboards and heat maps using Power BI to visualize global activity. Automation & Integration: Sync Dynamics with various internal applications and automate credit checks, customer alerts, and marketing workflows. … AI & Algorithmic Triggers: Develop smart alerts based on customer behavior trends. Web Development: Improve and expand their web-based quoting tools and plugins. API Development: Connect with global data sources like currency rates, oil prices, and freight indices. Skills Proficiency in SQL and PHP Experience with Microsoft Dynamics 365, Power BI, and .Net Strong understanding of API More ❯

the-art generative AI, retrieval-augmented generation (RAG), and reasoning frameworks to build intelligent and context-aware systems. We are seeking talented Machine Learning Engineers with full-stack software development experience to join our client's team and help shape the future of AI-powered automation. Within this dynamic role varied duties will include: Search relevancy engineering. Conversational AI … Development : Design, train, fine-tune, and deploy LLMs with reasoning capabilities. Retrieval-Augmented Generation (RAG): Implement, optimise, and scale RAG pipelines for effective information retrieval from structured and unstructured sources. Model Fine-Tuning & Training : Train domain-specific models using techniques like LoRA, QLoRA, PEFT, reinforcement learning, and supervised fine-tuning (SFT). Model Deployment & Inferencing : Optimise model serving and … AutoGen, and DSPy. AWS Cloud & MLOps: Deploy scalable machine learning workloads on AWS using services like SageMaker, Bedrock, Lambda, S3, DynamoDB, ECS, and EKS. End-to-End AI Product Development : Work across the full ML lifecycle, from data collection and preprocessing to model evaluation, deployment, and monitoring. Full-Stack Integration : Develop APIs and integrate ML models into web applications More ❯

of collaboration and continuous improvement. Evangelise emerging technologies and modern engineering practices. Mentor and guide large technical teams, promoting high standards in code quality, DevSecOps, and automation. Drive the development of cloud-native applications, with a strong focus on modern JavaScript frameworks and API/microservices architecture. Monitor and improve engineering maturity across teams. Collaborate closely with stakeholders … manage technical dependencies, and communicate effectively through strong storytelling and influence. Essential Skills & Experience: Strong background in JavaScript frameworks, microservices, and API development. Experience in building modern applications with cloud-native architectures. Proven leadership in large technical teams, with an Agile and product-focused mindset. Expertise in engineering culture, DevSecOps, and automation. Experience with public cloud platforms (e.g., AWS More ❯

functional teamsto manage and deploy cloud solutions We'd love you to have Strong knowledge of cloud platforms(e.g., AWS, Azure, Google Cloud) Experience with C#, MVC including RESTful API development and consumption with JSON Experience within SOA/API architecture Web Services development and consumption Excellent troubleshooting skillsfor both cloud and on-premises systems We More ❯

with relevant stakeholder management experience Experience scoping and building new data feeds and understanding how they get used by both internal and external stakeholders Experience with data delivery technology, API development and message queuing, preferably within sports Experience with AWS or similar technologies and infrastructure Some experience with REST and/or GraphQL APIs Experience working with baseball More ❯