1 to 25 of 252 REST Jobs in London

Fullstack Developer

Hiring Organisation
Devonshire Hayes Recruitment Specialists Limited
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £55,000 per annum
Grid Real-time communication using WebSockets or SignalR Strong experience building real-time trading or financial applications Back End C# .NET 8 Python REST APIs/Web APIs Microservices Architecture Messaging & Caching RabbitMQ Redis DevOps & Cloud Azure DevOps Git/Repos CI/CD Pipelines Azure and/ ...

Solution Architect

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
handling large data volumes, with experience across cloud data platforms, data pipelines and SQL‐based technologies. Integration: Strong integration experience across external systems, including REST APIs, messaging and event‐driven architectures, and secure file and data exchange, with experience using canonical data models and anti‐corruption layers. Security: Strong grounding ...

Solution Architect (Contract Role)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
driven design. Experience designing large data-volume solutions across cloud data platforms, pipelines, and SQL-based technologies. Proficiency in integration with external systems via REST APIs, messaging, event-driven architectures, secure file exchange, and use of canonical data models and anti-corruption layers. Strong foundation in security architecture, including authentication ...

Senior & Principal Java Camunda Enigneers

Hiring Organisation
Casci
Location
South East London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£75,000
Proven experience leading and mentoring teams of engineers to deliver high-quality, production-grade software (expected at Principal level) Familiarity with Spring Boot, REST APIs, and microservice architectures Knowledge of Docker, Kubernetes, Git, CI/CD pipelines, and automated testing frameworks Good knowledge of security, authentication, and integration patterns ...

Senior Java Developer

Hiring Organisation
MW recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 - £125,000 per annum
solutions Capital Markets knowledge, ideally within Clearing or Prime Brokerage. Desirable Previous team leadership or mentoring experience Knowledge of Groovy, FIX/FIXML, FpML, REST APIs, JSON or messaging technologies Experience developing client portals and reporting platforms Experience working with distributed or offshore development teams. Technical Environment You'll have ...

Senior SDET (Software Development Engineer in Test)

Hiring Organisation
Uniting People
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 400 Daily
JIRA and Xray ISTQB Certification Key Responsibilities Develop and maintain enterprise automation frameworks Build reusable UI, API and database automation solutions Automate testing across REST APIs, Kafka, MQ and messaging platforms Validate XML, XSD and ISO20022 financial messages Enhance framework reporting, logging and diagnostics Integrate automated testing into CI/ ...

UI Architect

Hiring Organisation
Sanderson Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £570 per day
within complex environments Expertise in React, JavaScript (ES6+), TypeScript, HTML5 and CSS3 Experience designing SPA or micro-frontend architectures Strong understanding of API integration (REST, API gateway patterns, BFF) Experience working in cloud environments such as AWS or Azure Exposure to Docker, Kubernetes and CI/CD pipelines Strong focus ...

Java Engineer with AI

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
roadmaps Required Qualifications Strong experience with Java 12+, Spring Boot, and microservices architecture Experience integrating AI/ML solutions into backend systems Understanding of REST APIs, distributed systems, and database design Familiarity with SQL and NoSQL databases Experience with cloud platforms (e.g., Amazon Web Services, Google Cloud Platform, or Microsoft ...

Senior Java Developer IRC298567

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
leveraging core microservices patterns (e.g., Service Discovery, Circuit Breaker, API Gateway, and CQRS). Design and build robust, secure, and well-documented APIs (REST/gRPC) and manage inter-service communication using synchronous and asynchronous (event-driven) messaging patterns. Collaborate with cross-functional teams (Product, DevOps, QA) to define, design ...

Senior Developer - Global Regulatory & Controls Technology

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
required, exposure to the following is highly advantageous: Java | Python | Kubernetes | Kafka | Microservices | Event-Driven Architecture | CI/CD | SQL | Oracle | Redis | Elasticsearch | REST APIs | Cloud Technologies | Agile Delivery Location & Working Pattern London (Hybrid Working) We offer a flexible hybrid model combining office collaboration with remote working. Occasional ...

Director, Applied AI & Agentic Platform Engineering

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Backend & Distributed Systems Languages: Python (expert), Java/Spring Boot (enterprise standard), Go (plus) Architecture: Microservices, domain‐driven design, event‐driven systems APIs & Integration: REST/gRPC; Apigee, Kong Data & Messaging: PostgreSQL/Oracle, MongoDB/Cassandra, Kafka Cloud & DevSecOps Cloud Platforms: Strong experience with GCP (preferred); working knowledge ...

Software Engineer (SAR)

Hiring Organisation
Stott & May Professional Search Limited
Location
London, United Kingdom
Employment Type
Contract
/CD pipelines and frequent code integration. - Maintain accurate documentation and work tracking within Azure DevOps. Required Skills - Node.js & TypeScript - React & Express.js - REST APIs - Docker - Azure App Services & Azure Functions - Azure DevOps (Repos, Boards & Pipelines) - Azure Kubernetes Service (AKS) - Azure Container Registry - Cosmos DB - Kubernetes & Helm - Elasticsearch & Kibana - Infrastructure ...

Senior C# / .NET Developer | Risk & Securities Lending

Hiring Organisation
Randstad Technologies Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day
C# and .NET (including .NET Core). Exceptional Object-Oriented Programming (OOP) skills and architectural design principles. Proven track record in designing and implementing REST/JSON APIs. Solid SQL database experience (e.g., SQL Server). Strong grasp of application performance, scalability, unit/integration testing, and CI/ ...

Senior AI Engineer

Hiring Organisation
Sanderson Recruitment
Location
London, United Kingdom
Employment Type
Permanent
Microsoft development background. Extensive experience developing applications using C#/.NET and modern frontend frameworks such as React or Angular. Experience designing and building REST APIs and integrating AI capabilities into enterprise applications. Strong knowledge of Microsoft Azure, including Azure AI Foundry, Azure AI Services and cloud-native application development. ...

Principal Technology Architect - LLMs, agentic coding systems, intelligent IDEs, AI

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
research workflows where permitted; govern enterprise knowledge ingestion. Architecture & Integration Distributed systems, microservices, cloud‐native (Azure/AWS/GCP); secure API design (REST/GraphQL). MLOps & AIOps: CI/CD for AI, model lifecycle (eval, versioning, rollout/rollback), guardrails, telemetry, drift monitoring, prompt safety. DevSec & Responsible ...

AI Coder/Senior Full-Stack Engineer (.NET / React) — Remote, UK

Hiring Organisation
Event Solutions
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
success. Back-end: C#, .NET, Node.js Front-end: JavaScript/TypeScript, React, Next.js Cloud & Architecture: AWS (provisioned with Terraform), microservices, distributed systems, scalable REST APIs. Our environment is a hybrid — the newer stack runs on AWS with Azure Service Bus for messaging, while the legacy/static side still lives ...

Dell Boomi Integration Consultant

Hiring Organisation
Oscar Associates (UK) Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550 per day
profile configuration Create and manage secure Managed File Transfer (MFT) workflows to support high-volume and sensitive data transfers Publish, secure and govern REST/SOAP APIs through Boomi API Management, including gateway configuration, throttling and developer portal management Develop and maintain CI/CD pipelines using Git, Azure DevOps ...

S&T - Credit Systematic Trading Developer - Director

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
latency services, concurrency, messaging Python for research, analytics, data processing FIX protocol experience Front‐end engineering: JavaScript/TypeScript React real‐time dashboards (REST/WebSocket) Modern UI state management Distributed systems: Kafka/Chronicle PostgreSQL/KDB++ Caching strategies Avro/Protobuf DevOps: Linux Docker/Kubernetes CI/ ...

Python Developer

Hiring Organisation
Brio Digital
Location
London, Baker Street, United Kingdom
Employment Type
Contract
Contract Rate
£550/day
technical design discussions Essential Skills & Experience Strong commercial experience developing applications with Python Proven hands-on experience with Microsoft Azure Experience building and consuming REST APIs and microservices Strong understanding of cloud architecture and Azure services Experience with CI/CD pipelines and DevOps practices Familiarity with Git and modern ...

CRM Full Stack Software Engineer

Hiring Organisation
Elliot Marsh
Location
Central London, London, United Kingdom
Employment Type
Contract, Work From Home
distributed services CRM Full Stack Software Engineer You - Commercial experience with TypeScript, Node.js and React - Experience with Next.js and modern frontend development - Strong REST API and microservices experience - Knowledge of PostgreSQL and MongoDB - Experience with Docker, CI/CD and cloud platforms (AWS desirable) - Experience of Agile software development - Knowledge ...

Technical Consultant - C# and VB.NET - London, UK

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
technologies including ASP.NET, HTML5, CSS3, JavaScript, and modern application integration practices. Experience working with data interchange formats such as XML, JSON, AJAX, and REST‐based integrations. Strong understanding of Software Development Life Cycle (SDLC), application architecture, design patterns, and coding best practices. Experience leading development activities, performing code reviews, troubleshooting ...

Dynamics 365 Developer

Hiring Organisation
Nigel Frank International
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 - £70,000 per annum
with Microsoft Dataverse and SQL-based data structures. Understanding of relational database concepts and data modelling principles. Experience designing and consuming integrations using APIs, REST/SOAP services, and cloud-based technologies. Strong analytical and troubleshooting skills with the ability to diagnose complex technical issues. Ability to produce high-quality ...

Intermediate Java Software Engineer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£90,000
delivery. Some experience with Apache Kafka, including working on distributed messaging systems for real-time data processing and managing Kafka-based solutions. Experience developing REST-based APIs. Some experience with SQL is required, and exposure to SQL stored procedures and indexes is preferred. Knowledge with DevOps principles and CI/ ...

Java & .NET Developer

Hiring Organisation
Sky
Location
Isleworth, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
GBP per hour
cloud environment , ideally AWS , and working with containerisation technologies (Docker, Kubernetes). Applied knowledge of software engineering best practices, including object - oriented design, APIs (REST), automated testing, CI/CD and Agile methodologies . Demonstrable adaptability and flexibility, with experience working across both modern cloud-based systems and legacy/ ...

AWS Java Full Stack Developer

Hiring Organisation
Gazelle Global Consulting Ltd
Location
London, United Kingdom
Employment Type
Contract
rate available. Key Responsibilities Refactor Java & Angular applications into AWS cloud-native microservices. Develop with Java 11+/17, Spring Boot, Microservices, and REST APIs. Deploy solutions using AWS (EKS/ECS, EC2, Lambda, S3, RDS, CloudWatch). Build CI/CD pipelines using Docker, Kubernetes, Git, Jenkins/GitLab. ...