251 to 275 of 275 REST Jobs in London

C# .NET Developer

Hiring Organisation
Pontoon
Location
Bromley, London, South Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
£650 - £750/day Inside IR35
experience with: C# development .NET 6.0/.NET 8.0 .NET Core .NET Framework 4.7+ Web & API Development Experience designing and developing Web Services, including: REST APIs SOAP Services Strong understanding of API design principles and documentation standards. ASP.NET MVC 5 ASP.NET Web API 2 Front-End Development Angular (v2+) JavaScript … generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention. ...

Google Cloud Platform Data Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
with pipeline health monitoring, alerting, and audit trail via Cloud Monitoring and Cloud Logging. Build the Workday connector using RaaS for bulk extraction and REST APIs for real‐time lifecycle event capture, and configure Firebase Realtime Database to reflect classification and cost changes within minutes of each lifecycle event. Build … Oracle Finance connector using REST APIs with SOAP fallback, applying basis tagging at ingestion so the same pipeline serves statutory, management, Lloyd's, and regulatory reporting without rerunning the extract. Pair with each domain analyst on their source‐specific extraction builds, providing GCP architectural guidance while the analyst owns domain ...

Senior Java Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Java engineering, ideally with Java 17 and/or Java 21. Experience developing applications using Spring Boot and the wider Spring ecosystem, including REST APIs, reactive programming (Flux), configuration management, dependency injection, and scalable, production‐ready service design. Experience building reliable integration services using REST APIs, messaging platforms, or queue ...

Technical Lead - FX Trading Technology (Java)

Hiring Organisation
Robert Walters
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£100,000 - £120,000 per annum
experience developing enterprise Java applications within a banking or capital markets environment. Strong hands-on experience with Java, Spring/Spring Boot, Hibernate and REST APIs. Experience designing scalable, distributed, high-availability systems. Strong understanding of software architecture, design patterns and engineering best practices. Experience with Oracle SQL, messaging technologies …/REST) and CI/CD pipelines. Knowledge of Agile, Test-Driven Development (TDD) and DevOps practices. Equips with solid communication skills with the ability to lead technical delivery and engage business stakeholders Experience with FX trading systems (Spot, Forwards, NDFs) is highly desirable. Robert Walters Operations Limited ...

Back-End Engineer, Trading

Hiring Organisation
Jobleads-UK
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 ...

Principal Engineer, CoinDesk Data Engineering

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
market information. Our technical scope is expansive, encompassing the automated extraction and normalization of data from global exchanges to be served via high-throughput REST APIs, WebSocket streaming, and direct client deliveries. We operate with a high degree of ownership over mission-critical infrastructure, calculating the flagship indices that power … money. What You’ll Do Drive Technical Evolution: Develop and champion a cohesive, long-term technical roadmap that elevates our existing services (internal, external, REST, streaming) towards a unified and scalable architectural vision. Architect for the Future: Lead the design of resilient, high-throughput systems, ensuring new solutions ...

Senior Salesforce Developer

Hiring Organisation
Focus on SAP
Location
London Area, United Kingdom
Agentforce agents, prompts, actions and automation. Develop solutions using Salesforce Data Cloud for customer data unification, segmentation and activation. Design and implement integrations using REST APIs, SOAP APIs and Platform Events. Develop scalable automation using Salesforce Flow and Apex. Support Salesforce release management, deployment planning and environment strategy. Collaborate with … Service Cloud. Salesforce Agentforce. Salesforce Data Cloud. Apex Development. Lightning Web Components (LWC). Salesforce Flow. Apex Triggers. Batch Apex. Queueable Apex. Salesforce APIs. REST Integration. SOAP Integration. Platform Events. Salesforce Security Model. Profiles, Roles and Permission Sets. Salesforce Data Model. CRM Solution Design. Release Management. Agile Scrum delivery. Stakeholder ...

Senior Oracle Technical Consultant – DV cleared

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
functional modules (e.g., GL, AP, AR, FA, Procurement) to understand data flows and business processes driving integration needs. Develop and support integrations using REST/SOAP web services, FBDI, HDL, BIP reports, and Oracle Cloud Adapters. Leverage Oracle PaaS services (e.g., Autonomous Database, OIC, VBCS, API Gateway) and IaaS components … modules. Solid understanding of Oracle PaaS (Autonomous Database, VBCS, API Platform, Integration Cloud) and IaaS (Compute, Storage, Networking) concepts. Strong knowledge of REST/SOAP web services, XML, JSON, XSLT, and API design principles. Experience with Oracle Cloud Adapters, FBDI/HDL data loading templates, and BI Publisher reporting. Familiarity ...

Senior Business Solutions Analyst

Hiring Organisation
VIQU IT Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
across the business. Design and build Intapp Boomi workflows and integrations. Deliver business solutions that improve operational efficiency and user experience. Develop and maintain REST API integrations and Azure-hosted solutions. Produce technical documentation and promote development best practice. Troubleshoot complex technical issues and implement long-term improvements. Collaborate with … shape technical solutions. Train and mentor colleagues to increase internal Intapp capability. Key technologies: Intapp Cloud (essential) Intapp Intake & Open Intapp Boomi Azure REST APIs SQL Intapp Integration Service (IIS) SiSense JavaScript, Python or PowerShell Requirements: Proven experience developing and supporting Intapp Cloud solutions. Strong background building integrations and cloud ...

Applications Developer

Hiring Organisation
Precise Placements
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
industry leading law firm client are currently looking to take on a new Applications Developer (Power Automate, AI Processing, SharePoint, Azure, .NET, C#, REST) to join their team on a permanent basis. This role will contribute to the development, configuration and maintenance of applications. To be considered for this Applications … Developer (Power Automate, AI Processing, SharePoint, Azure, .NET, C#, REST) role, It's ideal that you have: 4 + Years within a similar role Ideal but not required law firm or professional services experience Key duties will include: contribute to the development, configuration, and ongoing maintenance of applications, collaborating with ...

Senior Backend Engineer (Java/.Net & Microservices)

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550/day Inside IR35
design and engineering best practice. Key Responsibilities Design and develop backend services using C#/.NET and Java (Spring Boot) . Build and support REST APIs and microservices. Contribute to architecture, technical design and system integration. Troubleshoot, optimise and support production systems. Collaborate with stakeholders and mentor other engineers. Essential … Skills Strong commercial experience with C#/.NET and Java (Spring Boot) . Proven delivery of microservices and REST APIs . Experience with distributed systems and enterprise integration. Strong SQL experience (SQL Server and/or Oracle). We're Looking For Engineering Ownership - Takes responsibility for delivery ...

Lead Mobile Engineer - contract - outside IR35

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
technical debt Cross‐Functional Collaboration Collaborate with backend and web teams to ensure seamless API integration and consistent user experience Deep knowledge of REST/GraphQL is a plus Innovation & Growth Stay current with industry trends and assess emerging technologies for future mobile strategy (e.g., KMP+CMP vs Skip) Community & Advocacy … more than one framework is a plus, but it’s only necessary to have deep knowledge of one and willingness to learn about the rest Experience leading teams of mobile engineers, ideally in a high‐growth or consumer‐facing company Deep understanding of mobile architecture, design patterns (MVVM, MVI, etc. ...

Senior Python Developer - Inside IR35 - Up to £700 per day

Hiring Organisation
Hunter Bond
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 700 Annual
regulatory reporting Contribute to architecture, scalability and system design decisions Partner with quants, traders and risk teams to deliver technical solutions Develop and integrate REST APIs and Back End services Maintain high code quality through testing, reviews and best practices Mentor junior developers where required Required Skills Strong Core Python … Quartz, SecDB, Athena, Kanon, Beacon or similar) Strong SQL and large-scale data handling expertise Pandas and NumPy for data processing and analytics REST API development using Flask, FastAPI or Django Strong understanding of performance optimisation and scalable systems Unix/Linux and Shell Scripting experience Domain Experience Investment Banking ...

Salesforce Developer - Asset Management - London

Hiring Organisation
Strike IT Services
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
Components (LWC), Visualforce and Salesforce APIs. Configure and customise Salesforce Sales Cloud and Service Cloud capabilities. Develop integrations between Salesforce and external systems using REST/SOAP APIs and Middleware technologies. Participate in technical design discussions and contribute to solution architecture. Ensure solutions are scalable, secure and aligned to platform … Salesforce Developer within enterprise-scale environments. Strong hands-on experience with Apex, Lightning Web Components (LWC) and Salesforce configuration. Experience developing integrations using REST and SOAP APIs. Knowledge of Salesforce Sales Cloud and Service Cloud. Experience working with source control and CI/CD pipelines. Good understanding of Salesforce security ...

Salesforce Solution Architect

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
Components, Platform Events, and APIs Ensure compliance with platform limits, performance standards, and governance Integration & Ecosystem Alignment Define and validate integration patterns using REST/SOAP APIs, events, and middleware (e.g., MuleSoft) Ensure robust data flows, ownership models, and system interoperability Align Salesforce solutions with enterprise architecture standards Governance & Quality … data modelling Proven ability to design solutions within Salesforce governor limits Integration & Architecture Experience with API‐led and event‐driven architectures Strong understanding of REST/SOAP APIs and middleware platforms (e.g., MuleSoft) Solid knowledge of Salesforce data architecture Agile Delivery Experience working in Agile Scrum environments Strong involvement ...

Lead Staff Software Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
regular 1:1s, own performance and growth conversations, and participate in hiring.### Skills Required* Backend Systems* Web Platform* Data Platform* C#* .NET* SQL* GraphQL* REST APIs* Reporting Systems* AI Systems* Agentic Systems* Technical Leadership* People Management* Distributed Systems* Cloud* Physical Data Centers* Petabyte-scale Data* Machine Learning* Advanced Visualizations* Interactive … meaningful scale. Experience with C#/.NET and SQL is a strong plus, though not required. Experience designing or building GraphQL and/or REST APIs is a plus. Experience with reporting or scheduled-reporting systems is a plus. Experience building AI or agentic systems is a plus. ...

Technical Lead - £650 / Outside IR35 / Working from Home

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
/Outside IR35) Location London, Bristol or Cornwall Option of working from remote Responsibilities Leading in the design and implementation of a new greenfield REST API and adaptation and integration of an existing REST API, leading a team of API engineers and developers. Working with the systems architect and team ...

ServiceNow Developer Contract - 6 months

Hiring Organisation
CBSbutler Holdings Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£450 - £500 per day + InsideIR35
ServiceNow applications and platform enhancements. * Translate business requirements into robust technical solutions. * Develop and support Service Portal/Employee Centre functionality. * Build integrations using REST APIs and modern web technologies. * Participate in Agile ceremonies including sprint planning, refinement, etc. * Troubleshoot production issues and perform root cause analysis. * Contribute to code … Service Portal or Employee Centre development. * Solid knowledge of Business Rules, Flow Designer, Client Scripts, UI Policies and Script Includes. * Experience building and consuming REST APIs. * Agile development experience. * Excellent analytical, troubleshooting and communication skills. * It would be an advantage if you had any experience with the following: ServiceNow Customer ...

SC Cleared Integration Specialist (SAP Cloud Integration)

Hiring Organisation
17918
Location
London, United Kingdom
third-party platforms. Supporting integrations with SAP S/4HANA Private Cloud environments. Designing and implementing APIs and web services. Working with OData, REST and SOAP protocols. Collaborating with project teams, architects and business stakeholders. Supporting testing, deployment and resolution of integration issues. Working independently while contributing effectively … Integration Suite - API Management. Knowledge of SAP S/4HANA environments, ideally S/4HANA Private Cloud. Strong understanding of integration protocols including OData, REST and SOAP. Ability to work both independently and collaboratively within a team environment. Excellent communication and stakeholder management skills. What You'll Get in Return ...

Lead Salesforce Engineer

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
that balance declarative functionality with custom development Lead hands‐on development across Lightning Web Components (LWC), Flows and Apex Design and govern integrations using REST/SOAP APIs and modern API‐led architecture Define data models including Person Accounts, Households, Relationships and data‐sharing models Establish development standards, coding practices … Components (LWC) Apex SOQL/SOSL Salesforce Flows Strong understanding of Salesforce security, governor limits and platform performance Experience designing Salesforce integrations using REST/SOAP APIs and middleware Experience with Data Cloud (Data360) and Marketing Cloud Engagement Experience leading development teams or acting as a Salesforce Technical Lead ...

Principal Solution Architect, Embedded Platforms

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
implementation roadmaps. Design enterprise-grade integration architectures leveraging APIs, webhooks, cloud-native technologies and modern architectural patterns. Review and recommend API integration approaches including REST APIs, webhooks and event-driven integrations. Establish governance and testing frameworks that ensure scalable, secure and reliable partner integrations. Technical Leadership & Governance Set strategic technical … Experience with tax compliance, ERP integration, e-invoicing or regulatory technology platforms. Experience with Sovos solutions is advantageous but not required. Strong understanding of REST APIs, microservices, event-driven architectures and enterprise integration principles. Previous experience supporting ISVs through solution architecture, technical consulting or strategic partnerships. Proven success managing complex ...

NetSuite Technical Consultant

Hiring Organisation
IT Works Recruitment LTD
Location
City of London, London, United Kingdom
customisations using SuiteScript 2.x (Client Scripts, User Event Scripts, Scheduled Scripts, RESTlets, Suitelets) Build and maintain integrations between NetSuite and third-party platforms using REST and SOAP APIs Configure and develop SuiteFlow workflows and SuiteBuilder customisations to support business process automation Develop and maintain saved searches, reports and dashboards … 5+ years of hands-on NetSuite development experience, with strong SuiteScript 2.x capability as the foundation Proven experience designing and building integrations using REST and SOAP APIs Solid understanding of core NetSuite business processes across finance, operations or supply chain Experience working directly with business stakeholders to gather requirements ...

Principal Solutions Consultant

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
what you have promised, defensible in front of an enterprise security or engineering team. Deep comfort with enterprise technical topics: integration patterns like REST, SFTP, and system‐to‐system, data architecture, and security frameworks such as GDPR and SSO. Experience navigating RFPs for regulated or complex enterprise buyers, for example … with a broader customer data and identity stack. Strong grasp of client‐side integration nuances: mobile and web SDKs, push notification frameworks, webhooks, and REST or GraphQL APIs, including how they hold up under enterprise scale and multi‐region deployments. German language proficiency. Not required, but useful for DACH market ...

Head of Engineering, SAP/Oracle Platform & Transformation (HR and Finance)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
quality, release management and platform integrity Own technical decision making across configuration versus extension in Oracle, including Redwood adoption, BIP reporting, Oracle Integration Cloud, REST APIs and data integration patterns Ensure the reliability, performance and scalability of SAP and Oracle platforms across on premise and cloud hosted environments Support … system configuration Experience working with Oracle HCM platforms, including configuration, integrations and reporting Strong understanding of Oracle tooling and integration patterns, including OIC, REST APIs and data flows Awareness of core business domains such as Order to Cash, Procure to Pay and Record to Report, with the ability to collaborate ...

Remote Technical Lead - Outside IR35 - REST API

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
CTDI is looking for a Technical Lead to oversee the development of a new greenfield REST API and manage a team of engineers and developers. This role will involve working closely with the systems architect and project manager to scope out tasks and sprints within an innovative industry project. ...