676 to 700 of 779 REST Jobs in London

Senior Lead Oracle Fusion Cloud Integration & Extension Consultant role

Hiring Organisation
Version 1
Location
London, United Kingdom
Salary
£ 80 K
role demands strong experience in:• Designing and delivering Oracle Integration Cloud integrations across Fusion ERP, HCM and EPM • Building app-driven, scheduled, event-based, REST/SOAP and file-based integrations • Working with Fusion interface patterns including FBDI, HDL, BICC, BI Publisher outputs and public APIs • Establishing reusable OIC templates … deployment notes and operational support documentation. • Build and optimise OIC integrations using: o App-driven orchestrations o Scheduled integrations and bulk processing patterns o REST and SOAP services o SFTP/file-based interfaces o Oracle Fusion adapters and enterprise application adapters where applicable o JSON, XML, XSLT, XPath ...

Back-End Engineer, Trading

Hiring Organisation
Blockchain
Location
London, United Kingdom
Salary
£ 80 K
Platform, you will build the backend services that power our internal and external trading products — from order management and market data processing to the REST APIs and WebSocket streams that serve our web and mobile clients. You'll work closely with product, engineering, and trading teams, and contribute … facing APIs.Develop and improve services for order management, market data processing, and trade lifecycle handling in a real-time, high-volume environment.Build and maintain REST APIs and WebSocket streams that deliver real-time prices, order updates, and account data.Collaborate with cross-functional teams — product, frontend, trading — to adapt the platform ...

Front End Developer, Officer

Hiring Organisation
State Street Bank
Location
London, United Kingdom
Salary
£ 80 K
requirements.Role Description :Develop and maintain responsive, user‐friendly web interfaces for financial services applications using modern front‐end frameworks.Implement UI components that integrate with REST APIs, ensuring correct data handling, error states, and performance.Collaborate with UX/UI designers to translate designs and wireframes into high‐quality, accessible front … globally distributed teams and working across time zones.Exposure to Node.js for front‐end support or lightweight backend-for-frontend (BFF) services, including working with REST APIs and understanding how Node.js services integrate with enterprise Java or platform backends.About State StreetAcross the globe, institutional investors rely on us to help them ...

Front End Developer, Officer

Hiring Organisation
State Street Bank
Location
London, UK
Employment Type
Full-time
Description :Develop and maintain responsive, user‐friendly web interfaces for financial services applications using modern front‐end frameworks. Implement UI components that integrate with REST APIs, ensuring correct data handling, error states, and performance. Collaborate with UX/UI designers to translate designs and wireframes into high‐quality, accessible front … distributed teams and working across time zones. Exposure to Node.js for front‐end support or lightweight backend-for-frontend (BFF) services, including working with REST APIs and understanding how Node.js services integrate with enterprise Java or platform backends. About State StreetAcross the globe, institutional investors rely on us to help ...

.NET Developer

Hiring Organisation
Avanti
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £55,000 per annum
/.NET Core Developing new features across a cloud based SaaS platform Working with Vue/TypeScript on front-end functionality Building/Integrating REST APIs Working with Azure services and cloud-hosted applications Participate in code reviews and technical discussions Using AI coding tools to support development and improve … productivity Essential Skills Commercial experience with .NET Core Experience with a modern front-end (Vue/React/Angular) REST APIs Some experience using AI tools (Claude/CoPilot) Previous SaaS or Product experience Experience with Azure or cloud-based applications would be beneficial. Benefits Salary ...

.NET Developer - SaaS

Hiring Organisation
Avanti
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £55,000 per annum
/.NET Core Developing new features across a cloud based SaaS platform Working with Vue/TypeScript on front-end functionality Building/Integrating REST APIs Working with Azure services and cloud-hosted applications Participate in code reviews and technical discussions Using AI coding tools to support development and improve … productivity Essential Skills Commercial experience with .NET Core Experience with a modern front-end (Vue/React/Angular) REST APIs Some experience using AI tools (Claude/CoPilot) Previous SaaS or Product experience Experience with Azure or cloud-based applications would be beneficial. Benefits Salary ...

Back-End Engineer, Trading

Location
Greater London, England, United Kingdom
Platform, you will build the backend services that power our internal and external trading products — from order management and market data processing to the REST APIs and WebSocket streams that serve our web and mobile clients. You'll work closely with product, engineering, and trading teams, and contribute … Develop and improve services for order management, market data processing, and trade lifecycle handling in a real-time, high-volume environment. Build and maintain REST APIs and WebSocket streams that deliver real-time prices, order updates, and account data. Collaborate with cross-functional teams — product, frontend, trading — to adapt ...

Software Engineer – Backend

Location
Greater London, England, United Kingdom
fault tolerance, high availability, and low latency at petabyte scale. Contribute to the evolution of an API-first platform, designing clean, versioned, extensible APIs (REST/gRPC) for control, automation, and integration. Own API lifecycle management including versioning, backward compatibility, deprecation strategies, and governance; ensure APIs are intuitive, consistent … capabilities to improve operational transparency and supportability. Design and implement secure-by-design systems with strong authentication, authorization, RBAC, encryption (in transit and at rest), and audit logging. Collaborate with security teams to ensure compliance with enterprise and regulatory standards. Design systems for fault tolerance, graceful degradation, disaster recovery ...

Senior Engineer - Data Science

Hiring Organisation
Royal Bank of Canada
Location
London, United Kingdom
Salary
£ 80 K
opportunity You'll build the plumbing that gets ML models into the hands of the people who need them. Whether it's REST APIs feeding internal apps, GraphQL endpoints powering dashboards, or MCP servers fueling AI agents-you own the serving layer that makes models actually useful across RBC.You … scale.This is a permanent, full-time role requiring 4 days in the office at our London location.What will you do Design and build REST and GraphQL APIs that expose ML models from Databricks to internal apps, CRM platforms, and enterprise systems-handling contract design, versioning, authentication, and clear documentationBuild ...

Principal Backend Engineer Java Spring Boot AWS

Hiring Organisation
Client Server
Location
London, United Kingdom
Salary
£ 100 K
client engagements from design through to deliveryDeveloping scalable Java applications using Spring Boot and microservicesModernising and migrating legacy systems to AWSDesigning and working with REST APIs and distributed systemsIntroducing and improving CI/CD and DevOps practicesProviding technical expertise and guidance to clients and engineering teamsLocation/WFH:There … environmentYou have strong Java development skills including multi-threading and concurrencyYou have experience with Spring Boot and microservices environmentsYou have a good knowledge of REST APIsYou have a good understanding of AWSYou have a thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming, Data Structures ...

Principal Backend Engineer Java Spring Boot AWS

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
design through to delivery Developing scalable Java applications using Spring Boot and microservices Modernising and migrating legacy systems to AWS Designing and working with REST APIs and distributed systems Introducing and improving CI/CD and DevOps practices Providing technical expertise and guidance to clients and engineering teams Location/… strong Java development skills including multi-threading and concurrency You have experience with Spring Boot and microservices environments You have a good knowledge of REST APIs You have a good understanding of AWS You have a thorough understanding of software development and Computer Science fundamentals such as Object Oriented Programming ...

Senior Software Engineer Engineering · London · On-site

Location
Greater London, England, United Kingdom
through Terra — from upstream data suppliers (wearables, health apps, sensors) into our unified schema, and out to downstream developers and AI consumers via our REST API, Streaming API, and webhooks. This is not a maintenance role. You will build new data connectors, scale real-time streaming pipelines, harden our authentication … backend engineering.You have shipped systems that handle real traffic at scale. Not toy projects — real, battle-tested infrastructure. Deep API design experience.You've built REST APIs consumed by external developers. You understand versioning, rate limiting, pagination, error handling, and what it takes to make a developer love your API. Strong ...

Pre-Sales Senior Engineer

Hiring Organisation
Kaluza
Location
London, United Kingdom
Salary
£ 80 K
boilerplate and logic generation.Technical Asset Development: Design, build, and maintain reusable mock services in Node.js/TypeScript. You’ll implement contract-first APIs (REST/GraphQL), manage AWS deployments (API Gateway, Containers), and handle persistence using PostgreSQL or DynamoDBInfrastructure as Code: Manage demo environments using Terraform, ensuring environments are reproducible … development lifecycle. You aren't just using an AI assistant; you are "vibe coding" complete PoCs.API Design Expert: Experience designing clean, well-documented APIs (REST and/or GraphQL) and using Git/Github workflows effectively.Cloud & Infrastructure Knowledge: Familiarity with AWS primitives and a proven ability to deploy infrastructure using ...

Salesforce Technical Lead (Lead II - Enterprise Solutions)

Hiring Organisation
UST Global
Location
London, United Kingdom
Salary
£ 60 K
features where appropriate. Guide team members in developing Lightning pages, Dynamic Forms, and building automated flows. Manage and troubleshoot integrations with external systems via REST/SOAP APIs, middleware tools, and native Salesforce integration tools. Participate and contribute in and drive Agile ceremonies such as sprint planning, reviews, and retrospectives. … Flows, Visualforce, SOQL/SOSL, and Salesforce APIs.Proven experience leading Salesforce development teams and delivering enterprise-scale implementations.Hands-on experience with Salesforce integrations using REST/SOAP APIs and middleware platforms.Strong knowledge of Salesforce architecture, data models, security, sharing rules, and best practices.Experience with trigger frameworks, CI/CD, DevOps ...

SharePoint Developer / Consultant - M365

Hiring Organisation
Turner & Townsend
Location
London, United Kingdom
Salary
£ 70 K
Subscription EditionDevelop modern client-side applications and components using SharePoint Framework (SPFx)Build and maintain integrations between SharePoint and external systems using REST APIs and related technologiesDevelop solutions using SharePoint CSOM and JSOM technologiesSupport the maintenance, enhancement and modernisation of existing SharePoint customisationsTroubleshoot and resolve application, integration and performance issuesParticipate … SharePoint development and integrationsWorking within structured project delivery environmentsTechnical SkillsSharePoint TechnologiesSharePoint Framework (SPFx)SharePoint Client Object Model (CSOM)SharePoint JavaScript Object Model (JSOM)SharePoint REST APIsFront-end integration with SharePointSharePoint customisation and extensibilityDevelopment TechnologiesJavaScriptTypeScriptSvelteHTML5CSS3JSONTooling & Development EnvironmentVisual Studio Code or equivalentNodejs (LTS)npm or pnpmViteESLint and PrettierBrowser Developer ToolsGit-based source ...

Integrations Engineer

Hiring Organisation
Imperial College London
Location
London, United Kingdom
Salary
£ 60 K
related Azure services, to deliver enterprise-grade integration capabilities.Designing, developing and supporting APIs and system integrations using industry-standard protocols and technologies, including REST, SOAP, JSON and XML.Collaborating with Product Managers, Delivery Managers, engineers and business stakeholders to understand requirements, shape solutions and deliver value through iterative product development.Contributing across … Logic Apps, Function Apps, Service Bus and related Azure technologies.Experience designing, developing and supporting APIs and system integrations using protocols and standards such as REST, SOAP, JSON and XML.Experience using GitHub for source control, release management, CI/CD and collaborative software development.Experience translating business requirements into robust technical solutions ...

Senior Software Engineer London, Greater London, England, United Kingdom

Location
Greater London, England, United Kingdom
testing, while actively considering operational concerns such as observability, logging, and alerting throughout the development lifecycle Experience designing quality APIs such as REST, gRPC, GraphQL, and OpenAPI, and integrating with 3rd party APIs API security knowledge across OAuth2, SAML, JWT, and related standards Strong grounding in software engineering best practices … help the team by: Leading code reviews Contributing to, proposing and reviewing technical standards Improving operational processes Mentoring more junior colleagues Java Vert.x Spring Rest APIs MySQL Microservices Kafka Spark NodeJS React AWS Terraform AngularJS Benefits Competitive compensation, variable bonus and performance‐based reward opportunities, and retirement programs Medical, dental ...

Senior Salesforce Engineer

Location
Greater London, England, United Kingdom
across areas such as object modelling, automation, security and sharing, integrations, and platform architecture. Build and support integrations between Salesforce and external systems using REST/SOAP APIs, platform events, and other appropriate integration patterns. Identify technical risks, dependencies, and trade-offs early, and communicate them clearly to both technical … Experience making or contributing meaningfully to technical design and architecture decisions, rather than only implementing predefined solutions. Experience integrating Salesforce with external systems using REST/SOAP APIs, platform events, or similar integration patterns. Strong understanding of automated testing, code quality, and code review practices. Experience working with Git-based ...

Senior Salesforce Engineer

Hiring Organisation
Liberis
Location
London, United Kingdom
Salary
£ 80 K
decisions across areas such as object modelling, automation, security and sharing, integrations, and platform architecture.Build and support integrations between Salesforce and external systems using REST/SOAP APIs, platform events, and other appropriate integration patterns.Identify technical risks, dependencies, and trade-offs early, and communicate them clearly to both technical … sharing.Experience making or contributing meaningfully to technical design and architecture decisions, rather than only implementing predefined solutions.Experience integrating Salesforce with external systems using REST/SOAP APIs, platform events, or similar integration patterns.Strong understanding of automated testing, code quality, and code review practices.Experience working with Git-based version control ...

Atlassian Consultant

Hiring Organisation
NTT DATA
Location
London, United Kingdom
Salary
£ 80 K
audit, and regulatory requirements.Lead Atlassian Guard implementations to improve security posture using SSO, MFA and centralised user provisioning 3. Integration & Automation Architect integrations using REST APIs, webhooks, and middleware (e.g., Azure DevOps, ServiceNow, GitLab/GitHub, CI/CD pipelines, identity providers, observability tools, and data platforms).Build reusable automation … frameworksMarketplace apps (e.g., Xray, BigPicture, Insight/Assets, Tempo)Strong understanding of Agile scaling models (Scrum, Kanban, SAFe, LeSS).Proven experience architecting integrations via REST APIs, event-based automation, and identity/security frameworks.Experience with CI/CD, DevOps toolchains, and software development lifecycle practices. Soft Skills Strong consulting, facilitation ...

Leading Engineering Developer - Enterprise AI Products - Senior Vice President

Location
Greater London, England, United Kingdom
Build and maintain CI/CD pipelines to support reliable, repeatable deployments. Collaborate with teammates on shared components and codebases. Apply knowledge of networking, REST APIs, databases, and CLI tooling in day-to-day delivery. Troubleshoot and resolve technical issues swiftly and effectively. Risk & Compliance Take ownership of risk … level) stakeholders. Strong problem-solving skills, sharp attention to detail, and the ability to troubleshoot under pressure. Solid foundational knowledge of networking concepts, REST APIs, databases, and CLI. Excellent communication and collaboration skills, with the confidence to engage at all levels. Ability to adapt quickly in a dynamic environment where ...

Senior Workday Extend Platform Consultant

Hiring Organisation
Workday
Location
London, United Kingdom
Salary
£ 80 K
Developer Agent to generate, refine, and refactor application artifacts from natural language descriptions.Define and implement integrations and data flows using modern API patterns (REST, Graph APIs, and, where needed, SOAP via orchestrations).Lead technical workstreams, review designs from other consultants/partners, and promote best practices and reusable patterns.Mentor colleagues … connecting agents to external systems.Prior involvement in early adopter programs for new AI or platform capabilities. Extensive knowledge of web service and integration technologies (REST, SOAP, JSON, XML) and modern auth standards (such as OAuth, JWT, SAML). Fluency in English is mandatory. Additional European languages are an advantage. ...

Salesforce Integration Developer

Hiring Organisation
Focus on SAP
Location
City of London, London, United Kingdom
scale, highly regulated environment. You will be responsible for integrating Salesforce with enterprise applications, cloud platforms, third-party and on-premise systems , using Apex, REST/SOAP APIs, Platform Events and modern integration patterns . Working closely with Architects, Developers and business stakeholders, you will deliver secure, scalable and high … Responsibilities: Salesforce Integration & Development Design and develop complex integrations between Salesforce and enterprise applications, cloud platforms and third-party systems . Build and consume REST, SOAP and Bulk APIs , alongside Platform Events, Streaming APIs and custom Apex REST/SOAP services . Develop real-time, near-real-time, event-driven ...

Financial Risk Analytics (FRA) Implementation & Support Consultant

Hiring Organisation
S&P Global
Location
London, United Kingdom
Salary
£ 80 K
Science, Engineering, Finance, or another relevant technical discipline preferred Experience in cloud technology, ideally AWS, but GCP/Azure also valued, with experience with REST APIs/JSON/XML; Kubernetes experience valued Project management qualification such as Prince 2 or equivalent experience is an advantage Experience with data analysis … operational problem solving Experience with Python or other programming/scripting languages. Familiarity with REST APIs, JSON, and XML; exposure to modern technology platforms and workflows is preferred Commercial Awareness Experience of technology projects related to financial risk is preferred Understanding of financial markets, financial instruments and risk practices within ...

Integration Architect - Java, AWS, FS - OutsideIR35

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £600 per day + Outside IR35
integration architecture aligned with enterprise standards Define and govern integration patterns across teams Design and deliver event-driven, API-first, and messaging solutions (NATS, REST) Lead end-to-end integration delivery, including hands-on development (Java/Spring) Ensure scalable, cloud-native solutions on AWS Produce architecture artefacts (blueprints, contracts … cross-team integration efforts Primary Skills: Event-driven architecture and messaging systems (NATS, pub/sub, async patterns) API-first design and integration patterns (REST, gRPC) Java/Spring Boot and microservices architecture Cloud-native integration on AWS (ECS/EKS, SQS/SNS, API Gateway) End-to-end integration ...