16 of 16 API Development Jobs in the South East

Senior Software Developer

Hiring Organisation
Partnerscale
Location
Bicester, Oxfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £65,000 per annum
contribute to code reviews, mentor other engineers and work closely with stakeholders to deliver scalable, production ready solutions. Experience required: – 5+ years commercial .NET development experience – Strong ASP.NET Core experience including API development – Experience building Android focused apps using .NET MAUI or Xamarin – Solid knowledge of Entity … based collaborative environments – Exposure to automated testing practices Keywords C# .NET ASP.NET Core MAUI Xamarin Entity Framework SQL Server Azure SQL Android API Development ...

AI Chatbot Technical Lead

Hiring Organisation
FDM Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£60,000 - £95,000 per annum
hybrid role that will be based in London. Our client is seeking a hands-on AI Chatbot Technical Lead to drive the development and enhancement of their Service Management Chatbot. This is a key role for someone with deep technical expertise in Python, LangChain, and OpenAI services, particularly within … Azure environments. You will lead the technical delivery of the client’s Chat API, ensuring it is robust, scalable, and continuously improving. Responsibilities Lead the development and enhancement of the Chat API using Python, LangChain, and OpenAI services on Azure Function Apps Monitor and resolve API ...

Scientific Team Lead

Hiring Organisation
EMBL-EBI
Location
Saffron Walden, Essex, South East, United Kingdom
Employment Type
Permanent, Work From Home
will use your knowledge of systems architecture and design to guide your team to develop sustainable, scalable solutions. You will also coordinate the development of new interfaces and tools alongside the maintenance of existing tools and codebases including migration of these to new technologies and infrastructure. Your knowledge … databases, developing websites and working with big data (gigabyte to terabyte scale) In-depth knowledge of the following: software engineering, relational databases, service provision, API development, standards, software development best practices Project management and staff management experience Experience contributing to budget management and managing grants, including grant ...

Full Stack Developer

Hiring Organisation
Reed
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£490 - £530 per day, Inc benefits
seeking an experienced Full Stack Developer to join our team on a short-term contract. This role involves both front-end and back-end development, requiring strong skills in Java, Python, and API development. You will be instrumental in building and maintaining scalable, high-quality applications that deliver … mobile responsive design. Required Skills & Qualifications: Proven experience as a Full Stack Developer. Strong proficiency in Java and Python. Hands-on experience with API development and integration. Solid understanding of HTML, CSS, JavaScript, and modern front-end frameworks (e.g., React, Angular, or Vue). Experience with databases ...

Software Engineer

Hiring Organisation
Addition
Location
Milton Keynes, Buckinghamshire, England, United Kingdom
Employment Type
Full-Time
Salary
£41,000 - £60,000 per annum
deployment, ensuring we meet the evolving needs of our customers with innovative, reliable software. Required Skills: Strong experience in C# and .Net Core development Proficiency with Web API design and development Solid understanding of REST principles and SOLID design patterns Hands-on experience with Docker, Kubernetes …/SCRUM methodologies, CI/CD, and DevOps practices Good communication skills and a collaborative team mindset Nice to Have Skills: Experience with Web API integrations and microservices architecture Knowledge of Kubernetes and container orchestration AWS or Azure certifications or experience Familiarity with WebSocket or real-time data streaming ...

MuleSoft Developer

Hiring Organisation
University of the Arts London
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£44,375 - £57,344 per annum
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 …/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 ...

Microsoft Teams App Developer / Microsoft 365 Solutions Developer

Hiring Organisation
Lynx Recruitment Ltd
Location
High Wycombe, Buckinghamshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Fluent UI Backend & Cloud ASP.NET Core (C#) or Node.js Azure Functions and/or Azure App Service Azure SignalR or WebSockets Microsoft Graph API (Teams, users, meetings) Architecture & Concepts Real-time systems Role-based identity and permissions Secure enterprise authentication High-availability, fault-tolerant design What We’re Looking … Essential Proven experience building custom Microsoft Teams applications Strong Microsoft 365 and Azure experience Solid React and TypeScript skills Backend API development experience (C#/.NET or Node.js) Experience with real-time communication patterns Strong enterprise UX mindset — clear, accessible, and foolproof Ability to work with platform constraints ...

IT Software Developer

Hiring Organisation
Ideal Personnel and Recruitment Solutions
Location
Milton Keynes, Buckinghamshire, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £50,000 per annum
Consultant. We’re looking for someone who can bring enthusiasm and energy with them into the existing team. Duties and Responsibilities: To perform software development of delivered Infor M3 objects or the creation of new objects using Java programming language & associated tools and frameworks To analyse and interpret client … requirements To effectively interpret functional specifications and translate into technical software applications and/or design documentation Requirements: Java development or any other programming language experience Modern Web Technologies (Angular, TypeScript, JavaScript, CSS, HTML5, Node) SQL Use of REST APIs (JSON/XML) Experience across the board with ...

Solutions Architect

Hiring Organisation
Method-Resourcing
Location
St. Albans, Hertfordshire, South East, United Kingdom
Employment Type
Permanent
Salary
£95,000
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 … 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 ...

C# .NET Web Developer

Hiring Organisation
Interact Consulting Limited
Location
Milton Keynes, Buckinghamshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
skills: Minimum 4 years' commercial C# .NET experience. Strong SQL/MySQL skills (including complex queries). Experience with VueJS and/or Angular. API development and third-party integrations. AWS experience. Desirable skills: AI integration experience (e.g. OpenAI). Use of AI tools (e.g. Claude) in development ...

Lead Data Platform Engineer

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £85,000 per annum
with monitoring, logging and alerting solutions. * Ability to design, build and optimise cloud platform solutions. * Stakeholder management skills and confidence working across multiple teams. * API development experience. * Azure Data Factory knowledge is beneficial. What They Offer * Salary between £80,000 and £85,000 plus bonus. * Comprehensive benefits package ...

Full Stack Laravel Developer - Fintech SaaS Game Changer

Hiring Organisation
Recruitment Revolution
Location
Epsom, Surrey, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£50,000
heights with a game-changing SaaS platform already making waves across the UK, Europe, and North America. This isn't just a development role - you'll have a genuine voice in shaping the product, the architecture, and the direction of the company. At Debt Register , we're not just … Haymarket, SSE, Zendesk, Johnson Controls, ADT and More... Culture: Informality and Flexibility, Work-Life Balance, Wellbeing, Personal Growth and Trust Your Skills: Laravel (Backend Development). React & TypeScript. Fintech SaaS. AI/OpenAI API Integration. MySQL & API Development. Docker & CI/CD. ...

API Developer - London

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Temporary
Salary
£400 - £460 per day
API Developer - London Atrium EMEA are looking for several API Developers to support the Development teams onsite with a client in London. 12+mths contract, 2 days onsite/3 days remote, PAYE/Umbrella options. - API Developer - Java, TDD, RESTful API design & build, OAS/…/CD Pipelines, Java Database-Hibernate/JPA, SonarQube, Veracode, Jira, Confluence Click Apply now or contact Lianne to be considered for the API Developer - London role ...

AI Engineer

Hiring Organisation
Oscar Technology
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £100,000 per annum
agents, automate complex workflows, and extract value from structured and unstructured data at scale. This role sits at the intersection of AI engineering, software development, and applied machine learning , working closely with product, platform, and data teams. Key Responsibilities Design, build, and deploy agentic AI systems and intelligent workflows … architecture decisions, performance optimisation, and AI system monitoring Required Skills & Experience Bachelor's degree or higher in a relevant STEM discipline. Strong Python development skills for AI/ML and backend services Hands-on experience with agentic AI architectures and autonomous workflows Practical experience with AI orchestration frameworks (e.g. ...

Salesforce & React Native Developers - London

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Temporary
Salary
£450 - £550 per day
Salesforce & React Native Developers - London Atrium EMEA are looking for several Salesforce & React Native Developers to support the Development teams onsite with a client in London. 12+mths contract, 2 days onsite/3 days remote, PAYE/Umbrella options. Salesforce & ReactNative - Salesforce and .or ReactNative (Web), Java, TDD, RESTful … API design & build, OAS/YAML, Unit Testing, GitLab, CI/CD Pipelines, SonarQube, Veracode, Jira, Confluence Open Stack BA - Salesforce, ReactNative (Web), Java, TDD, RESTful API design & build, OAS/YAML, Unit Testing, GitLab, CI/CD Pipelines, Jira, Confluence API Developer - Java, TDD, RESTful API ...

CTO

Hiring Organisation
Leo Technology
Location
Petersfield, Hampshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
Seed to Series A) Hands-on expertise with OpenAI integrations or other LLM-based solutions Technical experience with Node.js, Python, and SQL Experience with API design and development for both internal and external use cases Knowledge of ISO/compliance Experience designing and scaling data pipelines and working ...