1 to 25 of 33 RESTful Jobs in Central London

Java Developer - Payments

Hiring Organisation
Crisil
Location
City of London, London, United Kingdom
Business Analysts, and Transformation Leads to deliver next-generation payments solutions. Key responsibilities Application Development & Integration Design and develop Java-based backend services and RESTful APIs for payment processing, reconciliation, and message translation. Implement ISO 20022 (MX) to MT message transformation logic and related schema validation using XML/JSON ...

Dotnet Developer

Hiring Organisation
Information Tech Consultants
Location
City of London, London, United Kingdom
development, APIs, and modern software engineering practices. Key Responsibilities Develop, test, and maintain applications using .NET/.NET Core/ASP.NET Design and implement RESTful APIs and microservices Write clean, scalable, and efficient code Collaborate with front-end developers, QA, and product teams Troubleshoot, debug, and upgrade existing systems Participate ...

Full Stack Developer

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £72000/annum
patterns to support high-performance server-side logic. UI Development: Construction of responsive interfaces and layouts using modern JavaScript frameworks. API & Microservices: Development of RESTful services utilizing the Java Spring Boot ecosystem. Data Management: Design and maintenance of SQL/NoSQL databases and ORM integration. Quality Control: Execution of unit ...

Senior React Developer

Hiring Organisation
Intec Select
Location
City of London, London, United Kingdom
Design, build, and maintain a React/TypeScript trading UI, delivering real-time streaming data and a seamless user experience Integrate the UI with RESTful and streaming APIs (built in Rust and Python) Own performance improvements across dashboards, widgets, and live data visualisation Collaborate with QA and DevOps to enhance ...

Senior Software Engineer

Hiring Organisation
GlobalLogic
Location
City of London, London, United Kingdom
working. Initially 6-9 months About the role: Experience with C#/.NET, other additional languages highly desirable ie Java, Python React/TypeScript RESTful API design Apache Kafka PostgreSQL Git/GitHub workflows Automated testing Experience with Kubernetes deployments; able to build CI/CD pipelines. Observability logs ...

Python Developer

Hiring Organisation
Radley James
Location
City of London, London, United Kingdom
/NoSQL databases. Proven experience working in fast-paced environments, ideally within trading, financial services, or high-frequency environments. Proficiency in developing RESTful APIs, microservices, and working with cloud-based architectures (AWS, GCP, or similar). Expertise in testing frameworks, CI/CD, and containerization technologies such as Docker ...

Senior Sharepoint Developer

Hiring Organisation
Ryder Reid Legal
Location
City of London, London, United Kingdom
APIs. Develop and maintain SharePoint Online intranet structures including architecture, navigation, branding, and content design. Integrate SharePoint with internal systems and thirdparty platforms using RESTful APIs and Microsoft Graph. SharePoint Administration & Operations Administer both SharePoint SE (onprem) and SharePoint Online environments. Manage updates, cumulative patches and platform maintenance. Monitor performance ...

Senior Java Developer (Low-Latency Payments Systems)

Hiring Organisation
RE Partners
Location
City of London, London, United Kingdom
hear from you. Key Responsibilities : Design, develop, and optimize low-latency, high-throughput backend systems using Core Java and SpringBoot. Build and maintain RESTful APIs and microservices that power secure payment workflows. Work with XML-based messaging standards and protocols commonly used in financial transactions. Deploy, monitor, and scale applications ...

Full Stack Engineer

Hiring Organisation
Coltech
Location
City of London, London, United Kingdom
development and working within established microservices environments. 💼 What You’ll Be Doing Building and enhancing backend services using Java & Spring Boot Developing and integrating RESTful APIs Working as part of a collaborative agile team to deliver features end-to-end Troubleshooting, debugging, and supporting production deployments 🧩 What You’ll Bring ...

Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

Hiring Organisation
VirtueTech Recruitment Group
Location
City of London, London, United Kingdom
month contract Responsibilities Build and maintain .NET services powering a global payments platform Contribute to event-driven microservices running in Azure Develop and maintain RESTful APIs used by internal systems and external partners Collaborate with senior engineers on system design and implementation Write clean, maintainable, and well-tested code Participate ...

Sharepoint Developer & Administrator

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£90,000
SharePoint Framework (SPFx) development. - Proficiency in TypeScript, JavaScript, React, HTML5, CSS3, and modern front-end development practices. - Strong experience integrating SharePoint solutions using RESTful APIs and Microsoft Graph. - Solid experience with C# and .NET Framework for backend and integration development. - Hands-on experience administering SharePoint on-prem environments, including patching ...

Senior Fullstack Software Engineer

Hiring Organisation
Outsmart Insight
Location
City of London, London, United Kingdom
them into robust, production-ready solutions. What you’ll be doing Designing and maintaining backend services primarily in Python Developing and evolving well-structured RESTful APIs Designing and improving data models across relational (e.g. PostgreSQL) and NoSQL databases Working across the stack where needed, including JavaScript, modern HTML/ ...

Engineering Manager - Software & ML

Hiring Organisation
Capital One UK
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
What we're looking for Leadership Excellence: Proven experience leading and supporting software engineering teams to achieve business goals. Technical Breadth: Excellent knowledge of RESTful API development in modern languages (Java, Python, or .Net) and experience with Cloud environments (AWS or Azure). AI Awareness: You aren't necessarily ...

Contract Senior Backend Engineer

Hiring Organisation
Formula Recruitment
Location
City of London, London, United Kingdom
Requirements Strong programming skills in the JVM ecosystem Some proficiency in Python 6+ years of backend development experience Proven experience with microservices architecture and RESTful APIs Proficient with both NoSQL and SQL databases Excellent communication skills, both written and verbal Why Join? Salary: Competitive day rate of up to £700p ...

Sharepoint Engineer

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£95,000
SharePoint Framework (SPFx) development. - Proficiency in TypeScript, JavaScript, React, HTML5, CSS3, and modern front-end development practices. - Strong experience integrating SharePoint solutions using RESTful APIs and Microsoft Graph. - Solid experience with C# and .NET Framework for backend and integration development. - Hands-on experience administering SharePoint on-prem environments, including patching ...

Senior Backend Engineer

Hiring Organisation
Fruition Group
Location
City of London, London, United Kingdom
Employment Type
Permanent
years' experience in backend software development within a fast-paced, agile environment. Strong proficiency in Python (or similar modern backend language) and experience building RESTful APIs or microservices. Solid understanding of data structures, algorithms, and software design principles. Experience with cloud-based infrastructure (Google Cloud, AWS, or Azure) Passion ...

Scala Developer (Remote)

Hiring Organisation
Stealth iT Consulting
Location
City of London, London, United Kingdom
functional teams to deliver enterprise‐grade solutions. Key responsibilities: Design, develop and maintain backend services and APIs using Scala and Play Framework . Implement RESTful endpoints, manage request/response lifecycle, and handle authentication/authorization flows. Write well-structured, idiomatic Scala and use functional programming patterns where appropriate. Build ...

Scala Developer - Remote Contract - Outside IR35

Hiring Organisation
Stealth iT Consulting
Location
City of London, London, United Kingdom
remote contract role with an immediate start. Key Responsibilities Design, develop, and maintain backend services and APIs using Scala and Play Framework . Implement RESTful endpoints, manage request/response lifecycle, and handle authentication/authorization flows. Write clean, idiomatic Scala code and apply functional programming principles where appropriate. Develop ...

Mainframe Engineer

Hiring Organisation
Lorien
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
processing. Strong skills in Mainframe transaction management, JCL, and system debugging tools. Familiarity with SOAP, WSDL, JSON, and integration patterns such as SOA and RESTful APIs. Good working knowledge of AWS services, particularly CloudWatch, DynamoDB, and Lambda, including monitoring, troubleshooting, and optimisation. Excellent verbal and written communication skills to effectively ...

Senior Software Engineer

Hiring Organisation
JSS
Location
City of London, London, United Kingdom
Mentor and coach engineers, promoting high standards of code quality and craftsmanship Drive technical decision-making, ensuring scalability, reliability, and performance Design and implement RESTful APIs and microservices architectures Oversee and improve CI/CD pipelines, automation, and deployment strategies Define and champion testing strategies, including unit and integration testing … C#/.NET (or similar technologies) Deep understanding of software engineering principles, including modular architecture and design patterns Proven experience designing and developing RESTful APIs and microservices Experience architecting end-to-end systems across frontend, backend, and data layers Strong knowledge of distributed systems and complex integrations Hands-on experience ...

Product Manager – Global Card Issuing Platform (BaaS)

Hiring Organisation
WorldFirst
Location
City of London, London, United Kingdom
understand how to build a core platform that handles 80% of global needs, with 20% regional modularity. API & SDK Expertise: * Expert-level knowledge of RESTful API design and developer experience (DX). Experience shipping SDKs that simplify complex frontend flows (e.g., card provisioning to Apple/Google Pay). Deep ...

Integration Program Manager

Hiring Organisation
PureSpectrum
Location
City of London, London, United Kingdom
ecosystem; preference for candidates from the buyer side of MR/insights due to the higher complexity of use cases. Strong knowledge of RESTful APIs, Postman, API documentation. Experience supporting buyer API integrations Exceptional communication and relationship-building skills across both marketing and engineering audiences. Proven ability to drive outcomes ...

.NET Developer

Hiring Organisation
Noir
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £60,000 per annum
.NET 10.0, C# 14 - Break Into Banking - London (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Azure, Angular 21, Vue.js, TypeScript, Multithreading, RESTful, ASP.NET Core Web API, EF Core 10.0, Programmer, Full Stack Engineer, Architect, .NET Developer) Are you stuck in a catch 22 situation i.e. want … training will be provided to fill any gaps in your skill set): .NET 10.0, ASP.NET Core, C# 14, Azure, Angular 21, Vue.js, TypeScript, multithreading, RESTful, ASP.NET Core Web API, EF Core 10.0, Solid, DRY, LINQ, Microservices, Agile and Azure SQL. No previous banking experience is required. This is a once ...

.NET Developer

Hiring Organisation
Noir
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£40,000 - £50,000 per annum
Developer, .NET 10.0 - Social Networking Site - London (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Azure DevOps, Agile, Blazor, JavaScript, React, Multithreading, RESTful, ML.NET, Azure AI, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client is the world's largest social-networking web site and they have ambitions … training per year and exposure to cutting edge technologies such as: .NET 10.0, ASP.NET Core, C# 14, Azure DevOps, Agile, Blazor, JavaScript, React, Multithreading, RESTful, ML.NET, Azure AI, Azure, Bootstrap, Agile and MongoDB. Additionally you will follow an official structured career progression program. Location: London, UK/Remote Working Salary ...

.NET Developer

Hiring Organisation
Noir
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £100,000 per annum
Developer - Fastest Growing Social Media Firm - London (Tech stack: .NET Developer, .NET 10.0, ASP.NET Core, C# 14, Azure DevOps, Agile, Blazor, JavaScript, React, Multithreading, RESTful, ML.NET, Azure AI, Programmer, Full Stack Engineer, Architect, .NET Developer) Our client is on a quest to transform how people discover, view and share content … development principles. Our client can provide you with industry recognized training in: .NET 10.0, C# 14, Azure DevOps, Agile, Blazor, JavaScript, React, Multithreading, RESTful, ML.NET, Azure AI, Bootstrap and MongoDB. Our client has a flat organization, which means that they believe great ideas can come from anywhere and anyone. From ...