1 to 25 of 135 API Development Jobs in the UK

Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities ...

Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities ...

Description – Senior Snowflake & API Specialist Experience: 12+ Years Domain: Banking/Financial Services Role Overview: We are looking for a Senior Snowflake & API Specialist with 12+ years of IT experience and strong banking domain expertise. The candidate should have hands-on experience in Snowflake data warehousing, API … development, and enterprise data integration. Key Responsibilities & Skills: Strong hands-on experience with Snowflake, SQL, and data warehousing. Expertise in REST API development, API integration, and API management. Experience with Python and ETL/ELT data pipelines. Knowledge of Snowflake architecture, data modelling, and performance ...

Tech: ASP.NET MVC 5, Restful API, Angular, SQL, Azure Challenge: Greenfield Trading platform, API development, industry specific challenges Firm: Well-known fintech50 business, 10 man flat Dev Team Pay: 75k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingLead ASP.NET MVC Developer FintechQuant is urgently … looking for a Lead ASP.NET MVC Developer to join our high profile client. Current challenges include cloud migration, greenfield trading platform development, and bank based API creation. Our client is well known in the WRAP and SIPP market as a full service provider. The environment is that ...

Senior Java Backend Developer - API & Microservices Modernisation Location: Telford - minimum 2 days per month onsite, remaining time remote Contract Length: 12 months Rate: £550 per day IR35: Inside IR35 Start Date: Candidates must be available to start w/c 4 January 2027 Client: Central Government The Role … Java-based RESTful APIs and microservices, with a strong focus on scalability, resilience, maintainability and integration with existing systems. Essential Skills Java - Strong backend development experience. Spring Boot - RESTful API and microservices development. Microservices Design - Experience designing scalable, resilient and loosely coupled microservices, including service-to-service communication. ...

Senior Java Backend Developer - API & Microservices Modernisation Location: Telford - minimum 2 days per month onsite, remaining time remote Contract Length: 12 months Rate: £550 per day IR35: Inside IR35 Start Date: Candidates must be available to start w/c 4 January 2027 Client: Central Government The Role … Java-based RESTful APIs and microservices, with a strong focus on scalability, resilience, maintainability and integration with existing systems. Essential Skills Java - Strong backend development experience. Spring Boot - RESTful API and microservices development. Microservices Design - Experience designing scalable, resilient and loosely coupled microservices, including service-to-service communication. ...

Tech: C# .Net, ASP.NET, WPF, MySQL Challenge: Greenfield High Data Throughput platform, API development, industry specific challenges Firm: Well-known fintech50 business, City of London, 10 man flat Dev Team Pay: 80k, Bonus- training budget, Pension, Life/Health, Some Flex Working Development Team Lead Fintech Quant … Lead Developer will Manage the Dev. team including recruitment Build and deliver business requirements Collaborate with Product Owner on defining development requirements and schedule Become enlightened on the system architectureThe environment is that of Facebook or Google, relaxed open with time to think and make the right decisions. ...

Developer Join a collaborative technology team where hands-on coding, technical leadership and continuous improvement come together. This opportunity suits someone with strong modern development, API, cloud, database and CI/CD capability who enjoys guiding other developers. If you’ve also worked in the following roles … also like to hear from you: Senior Software Engineer, Software Developer, Software Engineer, Senior Application Developer, Application Developer, Senior Systems Developer, Systems Developer, API Developer, Integration Developer SALARY: £70,000 - £85,000 per annum + Benefits LOCATION: Hybrid Working. Minimum 2 – 3 Days per Week from the Office ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rdparty products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rd party products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rd party products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

Ideally looking for experience in - expertise in LookML Semantic model Development - Development of custom visualisations using Looker API - Development of custom calculations using link vertex AI - Creation of LookML dashboards - Ability to use strong Github expertise WKCL1_UKTJ ...

Ideally looking for experience in - expertise in LookML Semantic model Development - Development of custom visualisations using Looker API - Development of custom calculations using link vertex AI - Creation of LookML dashboards - Ability to use strong Github expertise TPBN1_UKTJ ...

with the intention of moving into permanent positions paying £85,000-£120,000, depending on experience and level.This is not a traditional software development role focused solely on delivering tickets. We are looking for engineers who enjoy product thinking, design, building, prototyping and delivering solutions end-to-end, while … closely with product stakeholders to understand user journeys and determine the right technical solution Rapidly prototype and test ideas before committing to full-scale development Build scalable, maintainable architectures and API solutions Use AI-assisted development tools, including GitHub Copilot and similar coding agents, to accelerate delivery ...

maintain full-stack applications – Build robust, scalable applications using Python (FastAPI/Flask), and ReactJS following best practices and design patterns • Contribute to the development lifecycle – Write clean, maintainable code, implement CI/CD pipelines with GitHub Actions, deploy to Kubernetes, and ensure quality through testing and code reviews … environments • Software Engineering Fundamentals – Strong understanding of OOP concepts, design patterns, SOLID principles, algorithms, data structures, and ability to write clean, maintainable code • Backend Development – Proficiency in Python (Pandas, FastAPI, Flask) for building enterprise applications, data processing, and API development • Frontend Development – Experience with ReactJS , Node.js ...

impact from day one. As a Software Engineer in the full-time Technology Graduate Program, you'll join a 12-month technical and leadership development experience while contributing as a full-time colleague on an Enterprise Technology Services team. You'll build software, collaborate with Agile teams, and help … developer tools, machine learning concepts, and intelligent automation relevant to your team's work. Participate in graduate program learning, mentorship, networking, community, and career-development experiences while building your full-time career at American Express. What You'll Learn: How software is built and delivered "the Amex Way," including ...

impact from day one. As a Software Engineer in the full-time Technology Graduate Program, you'll join a 12-month technical and leadership development experience while contributing as a full-time colleague on an Enterprise Technology Services team. You'll build software, collaborate with Agile teams, and help … developer tools, machine learning concepts, and intelligent automation relevant to your team's work. Participate in graduate program learning, mentorship, networking, community, and career-development experiences while building your full-time career at American Express. What You'll Learn: How software is built and delivered "the Amex Way," including ...

impact from day one. As a Software Engineer in the full-time Technology Graduate Program, you'll join a 12-month technical and leadership development experience while contributing as a full-time colleague on an Enterprise Technology Services team. You'll build software, collaborate with Agile teams, and help … developer tools, machine learning concepts, and intelligent automation relevant to your team's work. Participate in graduate program learning, mentorship, networking, community, and career-development experiences while building your full-time career at American Express. What You'll Learn: How software is built and delivered "the Amex Way," including ...

Lead Developer/Team Lead – FintechTech: C# .net, Azure, SQL, Team City, GIT, TFSChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Insurtech software business, West London, 10 man flat Dev TeamPay: 65k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingQuant is urgently … looking for a Lead Developer/Development Manager to join our high profile client. Current challenges include cloud migration, greenfield trading platform development, and bank based API creation. Our client is a well known fintech software house in the City. Day to Day the Lead Developer/ ...

collaborative environment that fosters continuous learning and creativity. If you are passionate about machine learning, AI, and want to contribute to the platform capability development for our whole organization, we invite you to apply for the position of Technology Architecture in our AI Enablement Team. Job responsibilities: Software Development … Ph.D. preferred) with Proven experience of 7+ years in developing IT solutionsProficient in Python & ReactJS and related technologies is required. Experience with GenAI application development including vector stores, RAG solutions, context engineering, prompt engineering, observability is essentialExperience with Agentic AI development & Java Spring Framework would be advantageousUnderstanding ...

Tech: C#, Multithreading, Grindgain, Linq, SQL, Winforms Challenge: Greenfield Trading platform, API development, industry specific challenges Firm: Well-known Fintech Trading Platform Vendor, City of London, 30 man flat global Dev Team Pay: 80k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Software Engineer – MultithreadingQuant … They provide valuations and pricing of derivatives to most of the buy side. This is an opportunity for an individual with a strong software development background. The applicant will be responsible for design, development and maintenance of my clients main pricing analytical library in C#. Quants Developers Must ...

Junior Frontend Developer Angular Developer – FintechTech: Angular, C# .net, Azure, SQL, Team City, GIT, TFSChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Insurtech software business, London, 10 man flat Dev TeamUp to 45,000Quant is urgently looking for an Angular Developer to join our high … profile client. Current challenges include cloud migration, greenfield trading platform development, and bank based API creation. Our client is a well known fintech software house in central London. This is an expansionary role building a greenfield financial modelling platform used by major finance business'.Working together with ...

building and enhancing modern applications, APIs, and cloud-native services, whilst mentoring developers and promoting engineering best practice. Key Responsibilities Lead the design and development of robust, scalable software solutions Drive technical decision-making and provide guidance to development teams Develop and maintain RESTful APIs and microservices Build … quality, automated testing, and CI/CD best practices Support deployment, containerisation, and platform optimisation activities Essential Skills & Experience Strong commercial experience with Node.js API development using REST and OpenAPI Web application development using HAPI Database expertise across PostgreSQL , MongoDB , and Redis Unit testing with Jest ...

Tech: ASP.NET MVC 5, Restful API, Angular, SQL, Azure Challenge: Greenfield Trading platform, API development, industry specific challenges Firm: Well-known fintech50 business, 40 man flat Dev Team Pay: 120k, Bonus- 750 training budget, Pension, Life/Health, Some Flex Working Technical Architect FintechQuant is urgently looking … hands on Technical Architect to join our high profile client. Current challenges include cloud migration, greenfield trading platform development, and bank based API creation. Our client is well known in the WRAP and SIPP market as a full service provider. The environment is that of Facebook or Google ...

evolve their award-winning AI products. The role This is a genuine full-stack Software Engineer position where you'll work across backend development, databases and frontend applications. You'll be working with an Adobe ColdFusion (CFML) backend, MySQL databases and a React/TypeScript frontend. While previous ColdFusion … Business Analysis teams to develop secure, reliable and scalable software. The role will give you the opportunity to work on: Full-stack development across backend, database and frontend applications A multi-tenant SaaS platform AI, machine learning and LLM integrations API development and third-party integrations Technical ...