76 to 100 of 269 API Development Jobs in the UK

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment.The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes/… OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems.ResponsibilitiesTechnical DeliveryDesign, develop, and maintain backend components in Java, with a focus on performance and resilience.Contribute hands-on to features across messaging ...

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment.The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes/… OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems.ResponsibilitiesTechnical DeliveryDesign, develop, and maintain backend components in Java, with a focus on performance and resilience.Contribute hands-on to features across messaging ...

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment.The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes/… OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems.ResponsibilitiesTechnical DeliveryDesign, develop, and maintain backend components in Java, with a focus on performance and resilience.Contribute hands-on to features across messaging ...

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment.The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes/… OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems.ResponsibilitiesTechnical DeliveryDesign, develop, and maintain backend components in Java, with a focus on performance and resilience.Contribute hands-on to features across messaging ...

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment.The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes/… OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems.ResponsibilitiesTechnical DeliveryDesign, develop, and maintain backend components in Java, with a focus on performance and resilience.Contribute hands-on to features across messaging ...

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment.The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes/… OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems.ResponsibilitiesTechnical DeliveryDesign, develop, and maintain backend components in Java, with a focus on performance and resilience.Contribute hands-on to features across messaging ...

98742248336Posted: 2026-08-04Location: London, England, United KingdomCategory: Technology, Applications Development, ProfessionalCompany: CitiFX Client Platforms - Senior UI Software Engineer (Vice President)About the RoleWe are seeking a Senior Applications Developer to join a team delivering pricing solutions for the Foreign Exchange (FX) business. You will cover the full … software development lifecycle — analysis, design, implementation, and testing — while providing technical leadership to the team.Primary ResponsibilitiesDesign and develop high-quality trading GUIs providing compelling user experiences for internal and external tradersDefine and enforce interoperability standards across web applications using FDC3, and REST/WebSocket APIs. Experience with OpenFin ...

will be working for one of our high-profile trading clients within the financial services domain, contributing hands-on to a Java-based development team supporting a high-volume message processing environment. The team is heavily Java-focused, operating within a client ecosystem that relies extensively on Kafka, Kubernetes …/OpenShift, caching solutions, REST APIs, and high-throughput distributed systems. You will bring solid, practical experience in backend Java development and a keen interest in scalable distributed systems. Responsibilities Technical Delivery Design, develop, and maintain backend components in Java, with a focus on performance and resilience. Contribute hands ...

influence engineering strategy Work within a senior, AI-first engineering environment KEY POINTS Principal-level position with significant technical ownership Leading the design and development of a modern platform rebuild Strong focus on Node.js, TypeScript, React and cloud technologies Opportunity to shape engineering standards, architecture and AI adoption ABOUT … cloud infrastructure. Working closely with senior stakeholders, product teams and fellow engineers, you'll help establish engineering standards, drive adoption of AI-assisted development practices, and mentor other engineers as the team continues to grow. This role offers genuine autonomy, giving you the opportunity to influence technology decisions, engineering ...

candidates have led enhancements, maintenance, or improvements of existing systems. This position is especially suitable for those with hands-on experience in financial system development or financial IT consulting. (Ref: YC47581- Please include this when making any enquiries.) Main Responsibilities: Develop, maintain, and enhance financial systems (banking, securities, insurance … optimise databases such as SQL Server Propose and implement improvements or new functionalities for existing systems Coordinate with internal and external stakeholders Ideal Candidate: Development experience with C#.NET (3+ years preferred) Experience with SQL and database operations Knowledge of financial systems or financial operations (e.g., payments, settlements, reporting ...

Software Engineers at every level within a team across our Manchester, Gloucester or London teams, so we will discuss the great opportunities for development or challenges we offer based off your professional profile. Due to the interesting work we do and the sector this team is working … within your team Desired Skills and Experience Core Software Engineering across a variety of languages, e.g. JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL ...

components that meet user needs end-to-end. Write clean, secure, and well-tested code in Scala , adhering to functional programming principles and modern development standards. Operate, maintain, and scale the services you build identifying, triaging, and resolving production issues. Follow and help improve internal engineering best-practice guidelines. … Grafana. We're looking for: Strong commercial experience designing, building, and operating production software systems using Scala and the Play Framework. Confidence with modern development practices (Test-Driven Development using ScalaTest/Specs2, continuous integration/continuous deployment, and automated testing). Solid understanding of information security principles ...

technical direction within your team Required Skills and Experience Full-stack experience across a selection of JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development & OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL … testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please do make an application and we will identify where we can best support your growth specific to your application. #J ...

Tech: C# 5, Visual Studiuo, AWS, Angular.JS, Bootstrap, Docker Challenge: Greenfield Financial platform, API development, industry specific challenges Firm: Well-known fintech50 business, City of London, 30 man flat Dev Team Pay: 70k, Bonus- training budget, Pension, Life/Health, Some Flex WorkingC# Lead Developer FintechQuant Capital … Lead Developer MUST have:• Degree ideally Comp Sci • Proven practical knowledge and understanding of Object Orientation, SOA, design patterns like IoC and the Agile development practices • Strong commercial experience of Microsoft development tools, including Visual Studio 2013 or higher and C# with .NET Framework 4.5.2 or higher • Demonstrable ...

make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect … with your peers on technical direction within your team Desired Skills and Experience Core Software Engineering JavaScript frameworks (React, NextJS) TypeScript Python Java REST API development OpenAPI/Swagger Cloud & Infrastructure Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Data & Search ...

make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect … with your peers on technical direction within your team Desired Skills and Experience Core Software Engineering JavaScript frameworks (React, NextJS) TypeScript Python Java REST API development OpenAPI/Swagger Cloud & Infrastructure Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Data & Search ...

seeking a Senior Applications Developer to join a team delivering pricing solutions for the Foreign Exchange (FX) business. You will cover the full software development lifecycle — analysis, design, implementation, and testing — while providing technical leadership to the team. Primary Responsibilities Design and develop high-quality trading GUIs providing compelling … applications using FDC3, and REST/WebSocket APIs. Experience with OpenFin or Interop is desirable but not essential. Drive AI integration within the development lifecycle — including AI-assisted coding, automated test generation, and intelligent monitoring Influence performance engineering across the UI stack: profiling, rendering optimisation, bundle analysis ...

seeking a Senior Applications Developer to join a team delivering pricing solutions for the Foreign Exchange (FX) business. You will cover the full software development lifecycle — analysis, design, implementation, and testing — while providing technical leadership to the team. Primary Responsibilities Design and develop high-quality trading GUIs providing compelling … applications using FDC3, and REST/WebSocket APIs. Experience with OpenFin or Interop is desirable but not essential. Drive AI integration within the development lifecycle — including AI-assisted coding, automated test generation, and intelligent monitoring Influence performance engineering across the UI stack: profiling, rendering optimisation, bundle analysis ...

that is easy to test, maintain, and extend across both front‐end and back‐end services. Drive quality through excellent automated testing practices, including API testing to enable continuous deployment. Understand how modern web applications work end to end, from browser HTTP requests and API calls through … features. Core Competencies Demonstrates expertise in building scalable back‐end services and APIs using Java and Spring Boot, while also possessing strong front‐end development skills with React, TypeScript, and modern testing practices. Proficient in leveraging AWS for high‐performance solutions and utilizing AI tools to enhance product features ...

advancements in engineering practices, evaluating and recommending innovative solutions as appropriate.• Support the Platform Lead and identify solutions to engineering gaps/challenges.• Facilitate development of cross-functional capabilities to address common gaps/challenges.• Act as key point of contact for engineering decisions from a technical and risk … databases infrastructure capabilities work.• Expertise in infrastructure components, performance tuning, and capacity planning.• Understanding of, and hands on experience of, micro services, software development, infrastructure automation, api development and basic application system’s design.• Strong understanding experience on Site Reliability Engineering, DevOps Capabilities (CI/CD/ ...

impact National Security programmes Exposure to large-scale AWS cloud and DevOps environments Flexible and hybrid working arrangements Dedicated Career Manager and structured career development Access to extensive training and learning platforms Company bonus scheme 25 days annual leave with buy/sell options Private medical and dental insurance … continuous learning Desirable Experience AWS certifications such as Solutions Architect, Developer or DevOps Engineer Experience with Docker, Kubernetes, ECS or EKS Microservices and API development experience CI/CD tooling such as Jenkins, Bamboo, TeamCity or Bitbucket Automated testing practices and frameworks Understanding of Linux, networking and infrastructure ...

with your peers on technical direction within your team Desired Skills and Experience Core Software Engineering JavaScript frameworks (React, NextJS) TypeScript Python Java REST API development OpenAPI/Swagger Cloud & Infrastructure Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Data & Search ...

customers and colleagues. Experience Required 10-15+ years of experience in backend development. Basic/Essential Qualifications Proficiency in full-stack development with hands-on coding experience in Core Java, JPA/Hibernate, Spring framework, and basic caching concepts Knowledge of Spring ecosystem technologies including Spring Boot … creating rich, interactive React/Angularbased front-end applications. Experience building secure and scalable applications following enterprise design principles Solid coding practices for RESTful API development and consumption with understanding ofOpenAPI/Swagger specifications Understanding of API security protocols and authentication mechanisms (OAuth2, JWT) including TLS. Good ...

components that meet user needs end-to-end. Write clean, secure, and well-tested code in Scala , adhering to functional programming principles and modern development standards. Operate, maintain, and scale the services you build identifying, triaging, and resolving production issues. Follow and help improve internal engineering best-practice guidelines. … Grafana. We're looking for: Strong commercial experience designing, building, and operating production software systems using Scala and the Play Framework. Confidence with modern development practices (Test-Driven Development using ScalaTest/Specs2, continuous integration/continuous deployment, and automated testing). Solid understanding of information security principles ...

South Wales | £70,000 + Benefits An excellent opportunity for an experienced Software Engineer/Technical Lead looking to move away from hands-on development and into a broader software engineering lead/governance position. The role will take responsibility for establishing and governing software engineering standards across internally … improvement. Ensure solutions are secure, scalable, supportable and operationally ready before entering production. Provide technical leadership, design assurance and engineering oversight throughout the software development lifecycle. Review technical designs against non-functional requirements including availability, performance, security and supportability. Manage one internal developer and oversee external software development ...