1 to 25 of 27 REST Jobs in the City of London

Principal Technical Lead

Hiring Organisation
RSSB
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Core code-first migrations and data modelling. Strong front-end engineering skills in React and TypeScript, including component architecture, state management, and integration with REST/SignalR backends. Solid understanding of event-driven architectures. Hands-on experience with PostgreSQL or comparable relational databases. Experience with API and application security. Practical ...

Full Stack Software Engineer

Hiring Organisation
83zero Ltd
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 100,000 - 130,000 Annual
engineering roles, with a track record of building solutions end-to-end Experience deploying applications in cloud environments, preferably Microsoft Azure Strong experience in REST API design and OpenAPI standards Extensive experience working with databases, data platforms, and analytical tools Ability to research, propose, and implement solutions with minimal supervision ...

UI Engineer

Hiring Organisation
McCabe & Barton
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£85,000
enterprise-scale or modular applications. Deep knowledge of component-driven development, UI state management, layout systems, and SPA navigation. Strong experience working with REST APIs and .NET backends. Excellent command of C#, .NET Core 7, and asynchronous programming. Demonstrated ability to deliver pixel-perfect UIs from design specifications. Strong ...

Lead AI Engineer

Hiring Organisation
Anson Mccade
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
technologies include: Python Azure Databricks Generative AI/LLM frameworks Agentic AI tooling and orchestration frameworks LangChain/LangGraph PyTorch and ML libraries REST APIs Docker and containerisation CI/CD pipelines Git-based development workflows What we're looking for 4-6 years' experience within Software Engineering, AI Engineering ...

Lead .NET Engineer/Architect

Hiring Organisation
Tria
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 80,000 - 100,000 Annual
lead roles, with strong hands-on .NET/C# delivery. Demonstrable experience leading architecture decisions on production-grade systems, not just contributing to them. REST API design and integration experience at scale, including defining and governing integration standards. Microsoft SQL Server: schema design, query optimisation, and working knowledge of Always ...

Senior GenAI Architect for Cloud-Native AI Solutions

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
experience with AI-assisted development tools Strong knowledge of cloud AI and ML platforms and associated architecture patterns Experience designing and managing APIs including REST and GraphQL Strong understanding of microservices and serverless architectures Practical experience with DevOps and MLOps practices including CI/CD pipelines Knowledge of security frameworks ...

Solutions Architect, Legal Technology

Hiring Organisation
Brimstone Consulting
Location
City of London, London, United Kingdom
Employment Type
Permanent
Ensure solutions meet security, compliance, and governance requirements Contribute to solution scoping, costing, and technical decision-making Skills & Experience Strong experience with API integrations (REST, JSON, OAuth, event-driven architecture) Background in cloud ecosystems (e.g. Microsoft 365, Azure or similar) Experience with workflow automation tools (e.g. Power Automate, Logic Apps ...

Sharepoint Administrator

Hiring Organisation
ALFA TECHNOLOGY RECRUITMENT LTD
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£95,000
doing Leading migration from SharePoint 2016 on-prem to SharePoint SE and SharePoint Online Rebuilding legacy web parts using SPFx (TypeScript, React, REST APIs, Microsoft Graph) Administering both on-prem and cloud environments patching, upgrades, governance, DR Configuring Business Connectivity Services and External Content Types Designing and maintaining the enterprise ...

AWS Technical Lead

Hiring Organisation
INTEC SELECT LIMITED
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£120,000 - £130,000 per annum
hybrid connectivity Proven troubleshooting experience across networking, compute, identity, and automation layers Experience producing technical documentation, operational runbooks, and engineering standards Knowledge of REST APIs and cloud integrations Exposure to multi-cloud environments including Azure and Oracle Cloud preferred Experience with AWS services including EC2, S3, Lambda ...

Salesforce Data 360 Architect (SC Cleared)

Hiring Organisation
ARM
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £750/day Inside IR35
experience Data Streams Identity Resolution Segmentation & Activations Unified Data Model Transformations & Insights Experience delivering end-to-end Salesforce Data Cloud implementations Strong integration experience (REST APIs, ETL, third-party platforms) Solid SQL and data architecture knowledge Experience integrating with platforms such as Snowflake, Databricks, AWS, BigQuery, or Tableau Salesforce Data ...

Solutions Architect – Legal Technology

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
Ensure solutions meet security, compliance, and governance requirements. Contribute to solution scoping, costing, and technical decision-making. Skills & Experience Strong experience with API integrations (REST, JSON, OAuth, event-driven architecture). Background in cloud ecosystems (e.g. Microsoft 365, Azure or similar). Experience with workflow automation tools (e.g. Power Automate ...

Senior Presales Engineer

Hiring Organisation
Uniphore
Location
City of London, London, United Kingdom
integration and security: designing, integrating, and securing API connections between AI platforms and business applications (e.g., CRM, ERP, data warehouses), with knowledge of protocols (REST, GraphQL) and authentication mechanisms (OAuth 2.0, API keys). Data and network architecture acumen – ability to discuss and propose solutions around data governance, network segmentation ...

Software Engineer - PHP Laravel

Hiring Organisation
Big Red Recruitment Midlands Limited
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 45,000 - 55,000 Annual
Helping shape bespoke software solutions across the business Taking ownership of projects from concept through to delivery Technical experience required: PHP Laravel SQL Python REST APIs The role is based in central London 1 day per week with a salary banding of £45k-£55k. If this sounds like the next ...

Principal Development Engineer

Hiring Organisation
Jobleads-UK
Location
City Of London, England, United Kingdom
large‐scale or multi‐client platforms, with considerations for performance, customization, and maintainability. Familiarity with integration technologies and concepts such as: Real‐time messaging, REST APIs, File‐based integration, Cloud hosting (including cost and performance considerations), Web application architectures, Hybrid. #J-18808-Ljbffr ...

Workday Integration & Data Lead

Hiring Organisation
Oakleaf Partnership
Location
City of London, London, United Kingdom
Employment Type
Permanent
Cloud Connect Workday Web Services Proven experience designing and developing integrations using Workday Studio in enterprise environments Strong technical knowledge of: XML XSLT XPath REST/SOAP APIs Data transformation technologies Experience leading data remediation, migration, reconciliation, or data quality initiatives Strong understanding of Workday HCM data structures, business processes ...

Full Stack Developer

Hiring Organisation
Aimtech Recruitment Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
background within Financial Services, Investment Management, or similar regulated environments Proven experience delivering modern application and reporting solutions using Microsoft Azure Strong knowledge of REST APIs, App Services, Power BI, Power Platform, and data integration Experience with low-code and pro-code development across enterprise systems Understanding of AI integrations … paced environment Technical Skills Power Platform (Power Apps, Power Automate, Power Pages, Power BI) Python, JavaScript, TypeScript, Angular or React ASP.NET Core, Entity Framework, REST APIs, Swagger/OpenAPI SQL Server, PostgreSQL, NoSQL databases, vector databases FastAPI and AI service integrations (OpenAI, Claude, Gemini) Docker, Kubernetes (AKS), Azure App Services ...

Fully Remote Ruby Developer Role

Hiring Organisation
G.R.E. Recruitment Limited
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 75,000 Annual
Ruby Developer (Ruby, Rails, PostgreSQL, REST API's, AWS/Heroku, ReactJS) - Fully Remote (Two meet ups per year) - Open to applicants in the UK only - Award Winning Legal Platform - £65,000 - £75,000 G.R.E. Recruitment is delighted to partner with an award-winning legal technology provider who are continuing ...

Senior Systems Integration Engineer

Hiring Organisation
Intec Select Ltd
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
effective solutions. Skills & Experience Essential Strong experience in Systems Integration, Integration Engineering, Application Integration, or a similar technical role. Hands-on experience working with REST APIs, web services, ETL processes, webhooks, and system integrations. Strong troubleshooting and problem-solving skills. Experience working with third-party vendors and technology partners. Ability ...

SharePoint Administrator

Hiring Organisation
Eutopia Solutions ltd
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £95,000 per annum, Inc benefits
parts • Design and maintain enterprise SharePoint Online intranet architecture, navigation, branding, and content structures • Integrate SharePoint with internal systems and third-party platforms using REST APIs and Microsoft Graph • Administer SharePoint SE and SharePoint Online environments, including permissions, service applications, site collections, and governance • Perform system updates, patching, upgrades ...

Senior Technical Lead

Hiring Organisation
Nextech Group Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90,000
onboarding into a repeatable process. What you'll do Phase 1 (0-3 months): Lead the greenfield implementation of all core platforms. Build foundational REST API integrations and webhook-driven automations. Define the cross-platform data model - canonical field mapping, entity relationships and data quality standards across … HaloPSA, HubSpot, Sage Intacct, NinjaOne RMM, 3CX, Microsoft 365/Graph API * Strong JavaScript and/or Python for integration scripting and automation * REST API design - webhooks, OAuth, JSON transformation, event-driven architecture * Cross-platform data mapping across multiple SaaS systems * Technical documentation to a professional standard * Comfortable operating autonomously ...

Front End Engineer - AI

Hiring Organisation
Orion Innovation
Location
City of London, London, United Kingdom
agent tools, and custom modules that support reasoning, summarization, and multi-step task execution Integrate agents with enterprise systems (e.g., Workday, SAP, Salesforce) via REST APIs, SDKs, or message queues Build and manage agent lifecycle components , including initialization, memory/state handling, and fallback logic Implement and consume vector store … experience in developing and deploying production-grade AI/ML or automation solutions Strong proficiency in Python , with hands-on experience using FastAPI , REST APIs, and background task orchestration Deep familiarity with agentic frameworks such as LangChain , LangGraph , CrewAI , ReAct , or similar Understanding of LLM orchestration , including prompt design, tool ...

Integration Architect

Hiring Organisation
INTEC SELECT LIMITED
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
architecture and strategic technology initiatives. Role & Responsibilities: Own and govern the end-to-end integration landscape across enterprise systems. Design scalable integration patterns including REST APIs, event-driven messaging, SOAP, and file-based integrations. Define API standards, data contracts, and integration governance processes. Support the evolution of Azure Integration Services … Integration Architecture, Enterprise Architecture, or Senior Systems Analysis. Strong experience integrating enterprise platforms including Microsoft Dynamics 365, WMS, or TMS solutions. Expertise in REST APIs, GraphQL, Azure Service Bus, Logic Apps, Event Grid, and file-based integrations. Strong understanding of data modelling, JSON, XML, and OData. Experience creating architecture diagrams ...

AI Cloud Engineer

Hiring Organisation
Deerfoot Recruitment Solutions Limited
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
underpinned by robust governance and safety guardrails. Engineering Excellence: Drive automation through Infrastructure-as-Code (Bicep, Terraform) and CI/CD pipelines, while maintaining REST APIs and identity-aware solution patterns. Collaborative Impact: Work autonomously to manage ambiguity, collaborating across infrastructure and application teams to enhance platform stability and cost … engineering, PaaS services, and Infrastructure-as-Code (Bicep, ARM, or Terraform. Software Engineering: Strong proficiency in Python (essential) and PowerShell for building automation frameworks, REST APIs, and identity flows (OAuth2). Identity & Security: Solid understanding of Entra ID, IAM patterns, and implementing security controls within a regulated environment. AI Integration ...

IT Integration Developer

Hiring Organisation
Profectus Recruitment
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £80,000 per annum, Inc benefits
Azure Integration Services including Logic Apps, Azure Functions and API Management • Create event driven integration patterns and data flows between multiple systems • Work with REST and GraphQL APIs alongside modern authentication technologies including OAuth2, OpenID Connect and SAML • Ensure secure by design principles are embedded throughout all integration architecture • Produce … Looking For Commercial experience building API integrations and middleware solutions within complex enterprise environments • Strong knowledge of Azure Integration Services • Experience working with REST APIs, authentication protocols and API security best practices • Strong understanding of integration architecture, data mapping and event driven systems • Experience with Git or other version control ...

AI Cloud Engineer

Hiring Organisation
Deerfoot Recruitment Solutions
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£630 - £640 per day
user prompt and completion for full auditability. Engineering Excellence: Drive automation through Infrastructure-as-Code (Bicep, Terraform) and CI/CD pipelines, while maintaining REST APIs and identity-aware solution patterns. Stakeholder Collaboration: Act as a credible technical bridge between business analysts and senior front-office teams (including electronic trading … patterns, rather than purely self-taught or personal interest projects. Software Engineering & Tech Stack: High proficiency in Python and PowerShell for building automation frameworks, REST APIs, and identity flows. Production exposure to the OpenAI SDK, GPT models, and Palantir Foundry is highly desirable. Identity & Regulated Security: Exceptional understanding of Entra ...