26 to 50 of 59 REST Jobs in Central London

Scala Developer - Remote Contract - £400 Outside IR35

Hiring Organisation
Stealth iT Consulting
Location
City of London, London, United Kingdom
Strong understanding of functional programming concepts and idiomatic Scala (immutability, monads; familiarity with Cats or Scalaz is a plus). Experience designing and consuming REST APIs , including JSON validation/serialization (Play JSON, Circe). Proficiency with relational databases (PostgreSQL) and/or NoSQL (MongoDB), including schema design and query ...

Senior Data Engineer

Hiring Organisation
Bell Integration
Location
City of London, London, United Kingdom
Azure Data Factory, Synapse, etc.) Experience building and deploying Azure solutions using Azure DevOps pipelines and ARM/Bicep/Terraform templates Proficiency with REST APIs, authentication methods (OAuth, Managed Identities), and system-to-system integration patterns Knowledge of data modelling techniques and best practices Proven track record of mentoring ...

Java Engineer – Buyside FX Trading Systems

Hiring Organisation
Albert Bow
Location
City of London, London, United Kingdom
work closely with a Senior Java Engineer and Lead Quant, focused on execution and delivery. Must‐Have Skills Strong Java Spring Boot REST API development Solid understanding of performance, reliability, and production systems AWS (EC2, S3) Docker/Kubernetes Terraform CI/CD pipelines Prometheus & Grafana Low‐latency or performance ...

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 ...

Founding Engineer

Hiring Organisation
Explore Group
Location
City of London, London, United Kingdom
beyond. Core requirements: 3 plus years of engineering experience Strong in React and comfortable across the full JavaScript and TypeScript stack Backend experience building REST APIs using NestJS or Express Or Python Experience with MongoDB or similar databases Evidence of building independently, for example side projects, startups, open source work ...

Founding Engineer

Hiring Organisation
Tarka Talent
Location
City of London, London, United Kingdom
systems in production and 3–5 years of substantive software/platform engineering Deep JavaScript/Node.js skills Azure Fluency JSON data structures, REST API design, and complex semi-structured data Practical LLM application — RAG architectures, prompt engineering etc Comfort with both relational (MS SQL) and document (MongoDB) databases This ...

Lead C# Engineer - Agentic Workflows & AI Engineering, AWS

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £800 to £900 per day OUTSIDE IR35
level backend engineer with deep, current expertise in C# and .NET Core 8/9 , capable of architecting and leading the design of distributed REST API microservices at scale. Authority in AWS serverless architecture; Lambda-first, with strong working knowledge of API Gateway, SQS, Step Functions, EventBridge ...

Agentic AI Architect – Insurance Domain

Hiring Organisation
MANNING SERVICES LIMITED
Location
City of London, London, United Kingdom
retrieval optimization; RAG design, grounding strategies, context management Tool Access & Integration - MCP (Model Context Protocol) architecture and tool design; API design (FastAPI/REST/microservices); Integration with enterprise systems and third-party APIs AI Safety & Governance - NVIDIA NeMo Guardrails;Microsoft Presidio (PII detection/masking); Guardrails for prompt injection ...

Data Engineer

Hiring Organisation
Taylor Hopkinson Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Databricks and Azure (ADLS Gen2, ADF or equivalent). * Proven ability to implement Medallion architecture or equivalent layered data modelling patterns. * Experience with REST API ingestion and integration of business systems (ERP, finance tools). * Experience in a contractor or project-based delivery model preferred. * Exposure to OT/SCADA ...

Guidewire Technical Architect

Hiring Organisation
eTeam
Location
City of London, London, United Kingdom
Guidewire Data Model • Customization & Integration: o Sound knowledge of Guidewire xCenters (version 10.x & SaaS) customization and integration (Intra and Inter system integration) using REST and SOAP APIs • Technical Skills: o Experience with batch processes, Guidewire Messaging framework, and OOTB plugins o Familiarity with Infra concepts and deployment architecture ...

Senior Software Engineer – AI / Agentic Systems

Hiring Organisation
MA (Montreal Associates)
Location
City of London, London, United Kingdom
building and scaling distributed systems or cloud-native platforms (AWS preferred) Experience delivering end-to-end solutions in production environments Technical Skills API development ( REST/GraphQL ) and third-party integrations Strong knowledge of databases (SQL & NoSQL) Experience with event-driven systems/messaging (Kafka, RabbitMQ, SQS, etc.) Solid understanding ...

OpenVMS

Hiring Organisation
KBC Technologies Group
Location
City of London, London, United Kingdom
/Unix (academic, personal, or commercial experience) Some experience with Java applications or middleware (development or support) Basic understanding of web services or APIs (REST or SOAP) Ability to write and run basic SQL queries and understand database concepts Interest in IT operations, service delivery, and learning enterprise systems Clear ...

Back-End Integration Engineer (Fixed-term Contract)

Hiring Organisation
I3 Resourcing Limited
Location
City of London, London, United Kingdom
Employment Type
Temporary
Salary
£80,000
integration engineering experience Proven delivery of complex integrations end-to-end Expertise in APIs, microservices, and event-driven architecture Solid understanding of integration patterns (REST, messaging, orchestration) Experience with Azure integration stack (APIM, Service Bus, Event Grid, Functions) Strong coding skills in C# and/or Python Experience integrating legacy ...

Forward Deployed Engineer

Hiring Organisation
Curated
Location
City of London, London, United Kingdom
startup or scale-up environment Strong in TypeScript and/or Python. C# is a bonus, not a blocker Hands-on with AWS, REST APIs, and PostgreSQL Experience building with LLMs: tool calling, RAG, embeddings, agentic workflows The kind of person who talks to users, understands the problem deeply ...

Senior Exchange Connectivity Engineer | Crypto

Hiring Organisation
Selby Jennings
Location
City of London, London, United Kingdom
heart of their trading infrastructure, focusing on ultra-reliable, low-latency integrations with major crypto exchanges. Key Responsibilities Design and implement exchange connectivity modules (REST, WebSocket, FIX, proprietary APIs). Optimize order entry, market data ingestion, and account management for performance and reliability. Contribute to a fault-tolerant, scalable connectivity ...

Full Stack Engineer - Equity

Hiring Organisation
Dental startup
Location
Central London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
tech team as we grow Required Skills & Experience 3+ years commercial full-stack experience Strong React.js component architecture, state management, hooks Strong Node.js REST API development, authentication, middleware PostgreSQL schema design, query optimisation, migrations Multi-tenant SaaS architecture data isolation, permissions, org-level config Comfortable making architectural decisions independently Third ...

Identity & Access Management Architect (Entra ID / Azure)

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
authentication/SSO standards (OIDC, SAML, OAuth, Kerberos, LDAP). - Experience with RBAC, entitlement management, and automated provisioning/deprovisioning. - Skilled in PowerShell, REST APIs, and identity automation. - Familiar with micro-segmentation, NDR, and network-IAM interplay. - Experience with infrastructure hardening and monitoring across hybrid environments. - Knowledge of Azure Policy ...

ServiceNow Telecommunications Service Management (TSM) Architect

Hiring Organisation
Ubique Systems
Location
City of London, London, United Kingdom
design for TSM modules (service lifecycle management, order management, network inventory). Implementation & Integration: Architect complex integrations with BSS/OSS systems, using REST, SOAP, and IntegrationHub. Domain Expertise: Lead implementation of Telecom Network Inventory, Product Catalog, and Service Order Management. Governance & Mentorship: Guide developers, perform code reviews, and establish ...

Machine Learning Engineer

Hiring Organisation
Cititec
Location
City of London, London, United Kingdom
experience with LLMs, agent frameworks, and agentic reasoning patterns. Practical understanding of Model Context Protocol (MCP), including tool and server design patterns. Experience building REST APIs, ideally using FastAPI. Familiarity with prompt engineering and retrieval-augmented generation (RAG) architectures. Experience with containerisation and Kubernetes-based deployment environments. Ability to operate ...

Cyber Solutions Architect

Hiring Organisation
Intec Select
Location
City of London, Greater London, UK
email and proxy security, virtualization (VMware, Nutanix), and CyberArk Strong technical skills in SQL, Oracle, Linux, PowerShell, AD, LDAP, and API integrations (REST/SOAP, Ansible) Familiarity with CIS compliance, system hardening, and automation tools. Desirable: Experience with SaaS migrations, cloud-native security, and DevSecOps practices Relevant certifications (e.g., CCSP ...

Staff Frontend Engineer (AI Lab | £170,000)

Hiring Organisation
Paradigm Talent
Location
City of London, Greater London, UK
. A proven track record of delivering polished, performant, and elegant user interfaces. Deep appreciation for UI/UX craftsmanship and accessibility. Familiarity with REST APIs, websockets, and secure frontend patterns. A creative streak — you think visually and love turning complexity into clarity. Nice-to-haves Experience with ...

Senior Presales Consultant

Hiring Organisation
Salt
Location
City of London, Greater London, UK
influence roadmap and feature development. Key Requirements Extensive experience in presales or solutions engineering roles, ideally within fintech or payments. Strong working knowledge of REST APIs, SWIFT, and local/global payment networks. Proven ability to close commercial deals via consultative and solution-led sales approaches. Strong written and verbal ...

Salesforce Technical Lead

Hiring Organisation
Focus on WD
Location
City Of Westminster, England, United Kingdom
design and deliver scalable Salesforce solutions. Key Responsibilities Design, build, and implement Salesforce solutions across the platform Lead development using Apex, LWC, and integrations (REST/SOAP APIs) Own end-to-end technical delivery including data modeling, integrations, and deployment Collaborate with stakeholders to translate business requirements into technical solutions ...

Application Administrator (SC Cleared)

Hiring Organisation
Zero Plus Ltd
Location
City of London, Greater London, UK
patch and release governance within ITIL frameworks. Familiarity with Windows 10/11, macOS, iOS, and Android environments. Scripting or automation experience (PowerShell, REST API, Bash). Excellent stakeholder skills – confident engaging vendors, IT Security, and end-user teams. Active SC clearance (essential). Why join Zero Plus Purpose-driven ...

Application Engineer

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 ...