76 to 100 of 149 API Development Jobs in the UK

ll collaborate with cross-functional teams to deliver high-quality solutions using both modern and legacy technologies. Key Experience required: We're looking for candidates with experience in: Backend Development C# with .NET Core RESTful API development SQL Server and database design Legacy Systems ASP.NET Web Forms (maintenance and migration projects) Integration Integration with third-party services … internal platforms System design and architecture What You'll Bring A proactive mindset and problem-solving attitude Strong communication and collaboration skills Ability to work across the full software development lifecycle Passion for coding and scalable architecture What's on offer? Exciting projects across a wide portfolio of work Opportunity to have full autonomy and own your own work More ❯

points. Required skills & experience: Experience with Node.js. Strong knowledge of JavaScript and TypeScript. Microservices, Event Driven Architecture. Experience with Vue.js/Nuxt.js (preferential) or similar frontend frameworks and libraries. API development experience. Proficient experience with the AWS cloud platform. Excellent written and verbal communication skills. Strong problem-solving skills and attention to detail. Good organisational skills. The interview More ❯

greenfield solution that will drive huge business growth. In return this Software Engineer can expect an autonomous, knowledge share driven culture with a team of seven alongside excellent career development and training opportunities within this market leading organization. This Software Engineer should have most of the following key skills: - Solid commercial node.js - Strong Typescript skills - Understanding of cloud deployment … ideally AWS) - PostgreSQL database knowledge would be useful - Strong Test driven development skills with the ability to write unit tests - Third party API development skills - Solid system design understanding - Serverless, Headless, microservices etc - Any automation skills would be useful - Docker, Kubernetes etc - Any experience working with ERP solutions would be a real plus - A positive, engaging personality … they are writing This software Engineer will receive: - Starting salary of up to £65,000 - Long term remote working with one day a month in the office - Extensive personal development scheme - 25 days holiday - Private pension & healthcare - Fast paced, autonomous culture with extensive growth potential - Regular remuneration reviews So if you are a Software Engineer who wants to join More ❯

high-performance systems at scale. The Role: We’re seeking a talented Full-Stack Developer with strong experience in Golang and .NET to play a central role in our development team. You’ll be building real-time APIs, WebSocket systems, and large-scale distributed applications, as well as contributing to frontend projects using React and Next.js. The role also … and developing your expertise in Golang within a collaborative environment. Key Skills: Essential Strong experience with Golang Solid background in .NET/C# WebSockets and real-time data processing API development and strong problem-solving ability Remote working experience with excellent communication skills Desirable Node.js React/Next.js AWS and Kubernetes PostgreSQL, Redis (caching) Candidate Profile Mid-level More ❯

ll collaborate with cross-functional teams to deliver high-quality solutions using both modern and legacy technologies. Key Experience required: We're looking for candidates with experience in: · Backend Development o C# with .NET Core o RESTful API development o SQL Server and database design · Legacy Systems o ASP.NET Web Forms (maintenance and migration projects) · Integration o … platforms o System design and architecture What You'll Bring · A proactive mindset and problem-solving attitude · Strong communication and collaboration skills · Ability to work across the full software development lifecycle · Passion for coding and scalable architecture What's on offer? · Exciting projects across a wide portfolio of work · Opportunity to have full autonomy and own your own work More ❯

ll collaborate with cross-functional teams to deliver high-quality solutions using both modern and legacy technologies. Key Experience required: We're looking for candidates with experience in: Backend Development o C# with .NET Core o RESTful API development o SQL Server and database design Legacy Systems o ASP.NET Web Forms (maintenance and migration projects) Integration o … platforms o System design and architecture What You'll Bring A proactive mindset and problem-solving attitude Strong communication and collaboration skills Ability to work across the full software development lifecycle Passion for coding and scalable architecture What's on offer? Exciting projects across a wide portfolio of work Opportunity to have full autonomy and own your own work More ❯

across the team. You'll Need: Proven experience with C# and/or Go in production environments Strong experience with SQL Server and modern database architecture RESTful and GraphQL API development Experience with distributed cloud systems - we use Kubernetes in GCP Deep understanding of software design patterns and architecture best practices Prior experience acting as a technical lead More ❯

be collaborating with he strategy team on Greenfield projects which you'll take ownership of and will see the business impact of. There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js. Location: You'll be based in plush City office on a fulltime basis … Monday to Friday. About you: You have expertise with C# .Net, ASP.Net development You have a strong knowledge of databases (SQL or Oracle) You're comfortable with JavaScript/React You have a thorough knowledge of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms You are collaborative with excellent communication and stakeholder management skills You are … you: As a Senior Software Engineer/Developer you will receive a competitive package: Salary to £150k Bonus paid every six months based on personal performance (10-25%) Professional development Pension Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Apply now to find out more about this Senior Software Engineer/Developer (C# .Net) opportunity. At More ❯

/CD for data systems, and robust testing methodologies. Highly desirable skills include: Domain Experience: Familiarity with the unique structure of sports data (e.g., event, tracking, scouting, video). API Development: Experience building data-centric APIs, especially with FastAPI on serverless platforms like Google App Engine . Streaming Data: Practical experience building real-time data pipelines. DevOps & MLOps More ❯

pair programming and Agile ceremonies Contribute to second-line support and occasional out-of-hours support Communicate technical concepts clearly to non-technical stakeholders Stay engaged with the wider development community and share best practices Essential Skills Strong experience with Java 21 or later Deep understanding of TDD and BDD Proven experience with large-scale microservice architectures Agile development experience Familiarity with Unix-like systems (Linux/Mac OS X) Responsive Web Design principles API development and CI/CD pipelines Ability to quickly learn new tools and techniques Desirable Skills Jackson, JAX-RS, Mockito Messaging platforms: ActiveMQ, Kafka MongoDB or other document databases Experience with high-traffic websites and large datasets Ideal Candidate Traits Flexible More ❯

be collaborating with he strategy team on Greenfield projects which you'll take ownership of and will see the business impact of. There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js. Location: You'll be based in plush City office on a fulltime basis … Monday to Friday. About you: You have expertise with C# .Net, ASP.Net development You have a strong knowledge of databases (SQL or Oracle) You're comfortable with JavaScript/React You have a thorough knowledge of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms You are collaborative with excellent communication and stakeholder management skills You are … you: As a Backend Software Engineer/Developer you will receive a competitive package: Salary to £150k Bonus paid every six months based on personal performance (10-25%) Professional development Pension Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Apply now to find out more about this Backend Software Engineer/Developer (C# .Net) opportunity. At More ❯

/week onsite) Salary: £60,000 - £70,000 (depending on experience) Employment Type: Full-Time, Permanent Overview A dynamic consultancy is seeking a Senior Analytics Engineer to lead the development of scalable data solutions across a range of high-impact projects. This role offers the opportunity to work at the intersection of data engineering, analytics, and software development … Airflow . Collaborate with clients to understand business challenges and deliver tailored data solutions. Transform raw data into structured, actionable datasets for use in AI , predictive modelling , and platform development . Promote engineering best practices including automation, testing, and code quality. Mentor junior team members and lead technical workstreams to elevate team capability. Essential Skills & Experience Proven experience in … analytics engineering , data engineering , or model development roles. Advanced proficiency in Python (including libraries such as NumPy and Pandas) and SQL . Demonstrated ability to deliver production-ready solutions in a commercial environment. Strong communication skills with the ability to engage stakeholders and translate technical work into business outcomes. Hands-on experience with cloud platforms (preferably AWS or Snowflake More ❯

/week onsite) Salary: £60,000 - £70,000 (depending on experience) Employment Type: Full-Time, Permanent Overview A dynamic consultancy is seeking a Senior Analytics Engineer to lead the development of scalable data solutions across a range of high-impact projects. This role offers the opportunity to work at the intersection of data engineering, analytics, and software development … Airflow . Collaborate with clients to understand business challenges and deliver tailored data solutions. Transform raw data into structured, actionable datasets for use in AI , predictive modelling , and platform development . Promote engineering best practices including automation, testing, and code quality. Mentor junior team members and lead technical workstreams to elevate team capability. Essential Skills & Experience Proven experience in … analytics engineering , data engineering , or model development roles. Advanced proficiency in Python (including libraries such as NumPy and Pandas) and SQL . Demonstrated ability to deliver production-ready solutions in a commercial environment. Strong communication skills with the ability to engage stakeholders and translate technical work into business outcomes. Hands-on experience with cloud platforms (preferably AWS or Snowflake More ❯

Communicate AI capabilities and set realistic expectations. Essential Skills & Experience Strong expertise in GenAI, NLP, and ML. Hands-on experience with LLMs/SLMs, Python, Java, SQL/NoSQL. API development, web scraping, data integration. On-prem AI model deployment, open-source frameworks (e.g. Hugging Face, LangChain). Strong consulting and communication skills. Preferred Knowledge of data structures More ❯

Communicate AI capabilities and set realistic expectations. Essential Skills & Experience Strong expertise in GenAI, NLP, and ML. Hands-on experience with LLMs/SLMs, Python, Java, SQL/NoSQL. API development, web scraping, data integration. On-prem AI model deployment, open-source frameworks (e.g. Hugging Face, LangChain). Strong consulting and communication skills. Preferred Knowledge of data structures More ❯

SLM fine-tuning and prompt development. Proficiency in Python and data libraries such as Pandas, NumPy, Scikit-learn, PyTorch/TensorFlow. Practical knowledge in SQL/NoSQL databases and API development/integration. Proven ability to analyze model performance and optimize for accuracy, efficiency, and scalability. Exposure to prominent AI frameworks like Hugging Face, LangChain. Preferred/Advantage More ❯

edge back-end architecture. The Company Our client is transforming the way their industry works through innovative, AI-driven technology. With a collaborative culture and a focus on professional development, they provide an exciting environment to grow your skills while working on impactful projects. The role is primarily remote working, with one day per week from their offices near … Leamington Spa. What's Required? The ideal candidate will have: Strong experience with Java and Spring Boot A solid understanding of RESTful API development and microservices Proficiency with relational databases and query optimisation along with experience with DevOps tools is desirable An interest in AI technologies is a plus Next Steps Ready to take the next step in More ❯

and very valuable role in the UK pension industry. We are top in our field because of our people. Were looking for a skilled SharePoint Developer to join our 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 … Canvas), and Power Automate. The role also involves application maintenance, deployment, governance, and promoting best practices across the organisation. Were looking for candidates with proven experience in custom SharePoint development using SPFx (React), and a strong understanding of M365 services. You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration. More ❯

scalability from architecture to deployment. Write clean, well-documented, and testable code using industry best practices. Debug, profile, and optimize applications to ensure a frictionless user experience. Lead the development of new features and the enhancement of existing ones. Collaborate with product, design, and hardware teams to deliver user-centric solutions. Contribute to key architectural and technical decisions as … a foundational engineering team member. Report directly to the CTO and help shape the future of the product and platform. About You 5+ years of experience in full-stack development, ideally in early-stage startups. Deep experience with Vue or React, including frameworks like Nuxt or Next. Proven experience with Ionic for mobile application development. Strong backend experience with … Node.js, Typescript, and databases including PostgreSQL and Redis. Skilled in API development, database architecture, and authentication methods. Experience with both DynamoDB and PostgreSQL in production environments. A track record of technical ownership, showcased through open-source contributions or public demos/projects. Detail-oriented with strong problem-solving skills and the ability to drive initiatives to completion. Comfortable More ❯

term project, this position is on a contract basis (IR35 exempt). Full Stack Developer Role Responsibilities: Build Containerized Application Tools following the 12-Factor App Methodology. Test Driven Development (TDD) and extreme programming (XP). Develop Products as part of a balanced Agile Team (Product Manager, UI/UX Designer, Product Owner, Data Scientist as applicable). Design … and implement REST APOs and microservices Architecture. Develop Full Stack Solutions using Modern Javascript, Python and/or Java Frameworks. Perform front end development (eg React/Angular) and back end development (eg Node, js, Django, Springboot). Deploy containerized applications using Docker, Kubemetes or Openshift). Conduct Database design and programming (ie MySQL, PostgreSQL, MongoDB). Deploy … Docker. Support the creation of Sustainable DevSecOps pipelines. A strong understanding of Agile Delivery Practices. Full Stack Developer Role Requirements: A minimum of 4 years experience in Full Stack Development using Javascript, Python or Java. A minimum of 4 years experience in Front End Development (React, Angular) or back end development using Node, Springboot, Django/Flask More ❯

term project, this position is on a contract basis (IR35 exempt). Full Stack Developer Role Responsibilities: Build Containerized Application Tools following the 12-Factor App Methodology. Test Driven Development (TDD) and extreme programming (XP). Develop Products as part of a balanced Agile Team (Product Manager, UI/UX Designer, Product Owner, Data Scientist as applicable). Design … and implement REST APOs and microservices Architecture. Develop Full Stack Solutions using Modern Javascript, Python and/or Java Frameworks. Perform front end development (eg React/Angular) and back end development (eg Node, js, Django, Springboot). Deploy containerized applications using Docker, Kubemetes or Openshift). Conduct Database design and programming (ie MySQL, PostgreSQL, MongoDB). Deploy … Docker. Support the creation of Sustainable DevSecOps pipelines. A strong understanding of Agile Delivery Practices. Full Stack Developer Role Requirements: A minimum of 4 years experience in Full Stack Development using Javascript, Python or Java. A minimum of 4 years experience in Front End Development (React, Angular) or back end development using Node, Springboot, Django/Flask More ❯

in GenAI, NLP, and Machine Learning · Have 3 years + experience in AI positions · Hold previous hands-on experience with Python, Java, SQL/NoSQL databases · Have experience with API development, web scraping/crawling, and data integration · Practical exposure to on premise AI model deployment and open-source AI frameworks · Be consultative · Ability to assess AI tools More ❯

in GenAI, NLP, and Machine Learning· Have 3 years + experience in AI positions · Hold previous hands-on experience with Python, Java, SQL/NoSQL databases· Have experience with API development, web scraping/crawling, and data integration· Practical exposure to on premise AI model deployment and open-source AI frameworks · Be consultative · Ability to assess AI tools More ❯

experience in managing lifecycle of large language models and statistical language models including training and fine-tuning. Strong proficiency in Python, Java, and SQL/NoSQL databases, along with API development and data integration techniques. Practical experience with deploying AI models on-premise and utilizing open-source frameworks such as Hugging Face and LangChain. Qualifications: Bachelors or Masters More ❯

Our client is seeking an experienced AI Engineer to take the technical lead on the development and delivery of innovative, Generative AI solutions within a cross-government digital programme. This is a hands-on, senior engineering role focused on Large Language Model (LLM) technologies, Python-based API development , and AI product innovation . You’ll play a … Generative AI model integration . Work closely with Product Managers, Developers, and Data Scientists to ensure timely, high-quality delivery within agile sprints . Take ownership of the full development lifecycle — from build and testing to deployment and performance monitoring. Contribute to documentation, technical governance, and agile project processes. Minimum Requirements Proven experience with Large Language Model APIs (from More ❯