1 to 25 of 26 API Development Jobs in London

Duties will include: The design and implementation of best-in-class software architecture Produce and communicate clear technical designs to guide and contextualise solution development across products, services, projects, and systems, including applications, technologies, processes, and information which meet the business strategic needs. Create and maintain the architecture models … retros, sprint reviews, story-mapping, backlog refinement) helping the entire delivery team be the best that they can. Essential Skills: C# .NET Core, REST API Design and Development, API Management Document or No-SQL database solutions (particularly Elasticsearch) Messaging and microservices based architecture (Azure Service Bus, Azure ...

experience of different types of architectures and understanding of the tradeoffs between them. In this role, you'll be a senior contributor to the development and operation of our cutting-edge cloud-based platform. You should have a passion for both science and engineering, a proven ability to deliver … contribute to our mission! Responsibilities : As a Safe Intelligence Full Stack Software Engineer, you will: Engineering of Golang-based backend systems , focusing on API development and integration. Engineering on our TypeScript-based frontend systems , primarily utilizing React to craft intuitive and highly functional user interfaces. Productize and enhance ...

community to develop our data and MLOps capability infrastructure Requirements • Strong experience in software engineering with proficiency in a language such as Python for API development, Data engineering and automation tasks • A background in working with storage solutions such as PostgreSQL, MySQL, and BigQuery • Experience in API … development using tools such as FastAPI or Flask, enabling data access and integration across systems • Solid knowledge of cloud platforms (GCP and/or AWS), with the ability to design and deploy data solutions at scale • Experience with IAC and CI/CD pipelines to ensure reliable, repeatable ...

client implementations. Responsibilities Integration Management: Take full responsibility for the integration processes between Luminance and external systems, ensuring seamless interoperability and client satisfaction. Technical Development and Client Engagement: Actively participate in both the hands-on development of technical solutions and client interactions to understand their needs. Collaborate with … product development teams and shape team capabilities to meet organizational goals. Team Leadership: Lead a small team focused on developing innovative technologies that elevate client implementations to the highest standards of excellence. Collaborative Solution Design: Work closely with Client Solutions and other implementation teams to comprehensively understand client requirements ...

Company: 8 Signals Limited About us 8 Signals is a UK-based software development company specialising in building tailored digital solutions that help businesses solve complex problems and streamline their operations. We combine strong technical expertise with a deep understanding of our clients’ requirements to deliver high-quality software … whether that’s new applications, enhancements to existing systems, or bespoke API integrations. Our team works with a wide range of organisations from small businesses to large enterprises, and values pragmatic, maintainable development that generates real business value. About the role We’re looking for a Full Stack ...

Company: 8 Signals Limited About us 8 Signals is a UK-based software development company specialising in building tailored digital solutions that help businesses solve complex problems and streamline their operations. We combine strong technical expertise with a deep understanding of our clients’ requirements to deliver high-quality software … whether that’s new applications, enhancements to existing systems, or bespoke API integrations. Our team works with a wide range of organisations from small businesses to large enterprises, and values pragmatic, maintainable development that generates real business value. About the role We’re looking for a Full Stack ...

process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas … business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework for exposing AI models and automation services. ...

scalable applications while working closely with a highly collaborative Agile team. This is an excellent opportunity for an experienced developer who enjoys hands-on development, technical ownership, and contributing to architectural decisions. You'll work across both back-end and front-end technologies, influence best practices, and help shape … within a modern, cloud-based environment. The Role As a Senior Fullstack Developer, you will be a hands-on contributor across the full software development lifecycle, taking ownership of complex technical challenges while helping to shape solution design and development standards. You'll work closely with other developers ...

seeking a talented and experienced Full Stack Developer to join our dynamic team. The ideal candidate should have expertise in front-end development using React and Next.js, as well as proficiency in back-end development with Spring Boot, GraphQL, and Velocity scripts. Additionally, hands-on experience with … using Jenkins is crucial for success in this role. Mandatory Skills: React and Next.js, Spring Boot, GraphQL, and Velocity scripts Key Responsibilities: Front-End Development: Develop and maintain responsive and user-friendly web applications using React and Next.js. Collaborate with UI/UX designers to implement design specifications ...

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. Employment Type: Full-time, Permanent Salary: £50k-£65k depending on experience Start Date: Negotiable Working Hours: Monday to Friday … Server • Propose and implement improvements or new functionalities for existing systems • Coordinate with internal and external stakeholders Financial Systems Developer 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) is a plus ...

provider is looking for a Full Stack Engineer (Web & Data) to join its growing Automation & Analytics team in London. This hybrid role blends web development with data engineering, offering exposure to everything from dynamic front‐end interfaces and API development to cloud‐based data pipelines and analytics … platforms. If you love combining creativity in web development with the logic and scalability of data engineering, this is your opportunity to grow in a cutting‐edge environment. What You’ll Do Design, develop, and maintain end‐to‐end web applications —from intuitive front‐end interfaces to robust back ...

successful candidate will work on an Electronic Trading Platform for the FIC business . This is an exciting opportunity to contribute to the development and integration of advanced trading technologies in a prestigious and fast-paced environment. Specifically, experience of US treasuries and US Treasury Electronification is required … concurrency. FIC Trading Systems: Experience developing, maintaining, or supporting electronic trading platforms. Messaging Protocols: Familiarity with FIX protocol, MQ, JMS, or similar messaging solutions. API Development: Experience with RESTful and/or SOAP web services. Low Latency Programming: Understanding of techniques for minimizing latency in trading applications. Spring ...

networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Build and evolve backend services that support login, MFA, and client authentication Proficient with IaC, CI/CD (CloudFormation ...

What You'll Work On You'll be developing robust, secure, and efficient services using modern Java frameworks and tooling. Expect to contribute to API development, containerised applications, and cross-functional engineering initiatives. Must-Have Skills Strong commercial experience with Java Hands-on expertise with RESTful APIs Proficiency ...

week Key Skills Required Mainframes CICS Webservices Required Skills Experience working in ZOS Connect EE and DB2 REST, with extensive knowledge in CICS webservices. Development experience using FileAid, Xpeditor, IBM Explorer for z/OS, and Visual Studio. Proficient with SOAP, WSDL, and JSON, with a comprehensive understanding … including OOP and functional programming (Java 8+). Familiarity with Spring Boot annotations, configuration, and how it simplifies Spring application setup and deployment. RESTful API development experience. Option 2: Integration & Middleware Skills Hands-on experience using DataPower appliances. Development experience using XSLT, Gateway Script, and XPath. ...

focus on backend Python and TypeScript and some React work on the front end. You'll take ownership and work across the full development lifecycle, collaborating with customers to build and scale the product. The work is interesting and complex, you'll be able to contribute to the product … London office (close to Waterloo) with flexibility to work from home twice a week. About you: You have strong backend Python coding skills, including API development You have full stack experience, including TypeScript and React (or another framework) You have a good understanding of system design and scalability ...

Title : Workday Integration Developer 3 months Remote Inside IR35 - umbrella only Role requirements: Minimum of 3 years of experience with Workday HCM integrations - development, maintenance & support. Experience of Workday Integration Tools: Proficiency with Workday's integration tools and technologies, including Workday Studio, Enterprise Interface Builder (EIB), and Workday … PECI & PICOF. Programming Languages: Knowledge of programming languages such as XSLT for data transformation and scripting languages like JavaScript or Groovy for custom integrations. API Integration: Experience with RESTful and SOAP APIs to connect Workday with other systems and applications. Data Formats: Familiarity with various data formats like ...

Storage, Pub/Sub, and orchestrating workflows with Composer or Vertex Pipelines. Domain Knowledge: Understanding of sports-specific data types ( event, tracking, scouting, video ) API Development: Experience building data-centric APIs using FastAPI , especially in serverless environments (e.g., Google App Engine) Streaming Data: Familiarity with real-time data ...

Senior PHP Developer Location: Fully remote (You must be based in the UK) PHP - Laravel - MySQL - MongoDB - Git - cPanel - WHM - RESTful API - Apache Role Overview An established organisation is seeking an experienced Senior PHP Developer to join its development function. This role suits a highly autonomous developer … complex systems, working closely with project and technical leadership while operating independently on day-to-day delivery. You will be responsible for the design, development, enhancement, and optimisation of both existing PHP-based platforms and new systems, including APIs and database-driven solutions, hosted within dedicated server environments. ...

global marketplace meeting the needs of both users and merchants. You will oversee delivery across both web and mobile apps with an API-first cloud-based approach, applying your knowledge to simplify and refine operational processes. Some of Your Responsibilities & Core Duties will be to: Lead initiatives to enhance … personalised mobile-first shopping experiences. Contribute to the definition and delivery of Engineering roadmaps, anticipating technical challenges and managing interdependencies. Oversee the entire software development lifecycle, from conception to deployment and maintenance, ensuring high-quality outcomes across all phases. Implement best practices in coding, testing, and maintenance to enhance ...

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 ...

Collaboration style - You work well with others but are equally effective independently Nice to Have: Experience with modern frontend frameworks (React, etc) Background in API development or distributed systems For more information, please apply! Research shows that candidates from underrepresented groups often wait until they meet nearly ...

C#/.Net Expert Azure - Platform and Software Architecture Design Patterns - HLD and LLD Messaging/Queueing - Service Bus Data Ingestion - NoSQL/Postgres API Design and Development - RESTFul Cloud agnostic mindset a nice to have - AWS/GCP. Medium Term Aspirations:- Two routes are on offer ...

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 ...

Open Stack, Salesforce & React Native Specialists - London Atrium EMEA are looking for several Open Stack/Salesforce & React Native Specialists to support the Development teams onsite with a client in London. 12+mths contract, 2 days onsite/3 days remote, PAYE/Umbrella options. Open Stack/Salesforce & ReactNative … Salesforce, 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 ...