1 to 25 of 40 REST Jobs in the City of London

Mid-Level Full Stack Engineer | Audio Intelligence IoT Scale-up | Well Funded - Tech-for-good | TypeScript/Next.js/Node.js | £50K - £65K + Equity | Hybrid 3 Days LDN with Work From Anywhere Benefits

Hiring Organisation
Owen Thomas | Pending B Corp™
Location
City of London, London, United Kingdom
with Node.js or a similar runtime. Relational & non-relational database experience (PostgreSQL/NoSQL) Familiarity with front-end frameworks like React.js Experience with Docker, REST APIs, and cloud services (AWS, GCP, or Azure). A pragmatic problem solver who can balance delivering features with maintaining code quality. Strong communication skills ...

Solutions Engineer

Hiring Organisation
Anson McCade
Location
City of London, London, United Kingdom
software engineering experience, mainly in C# and/or Python. Strong knowledge of cloud services (Azure App Services, Functions, AI Services). Proficiency in REST APIs, microservices, and event-driven architectures. Experience with Git-based version control (GitHub/Azure DevOps) and CI/CD tools (Azure DevOps, GitHub Actions ...

Industry Principal- LLMs, agentic coding systems, intelligent IDEs, AI development platforms

Hiring Organisation
Infosys
Location
City of London, London, 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 ...

Principal Engineer React, Typescript, C#, AWS (Serverless), MySQL

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
technical decisions across squads; accountable for how software is built and shipped. Design and develop distributed, scalable microservices (C# .NET Core or Node.js) and REST/JSON APIs. Build modern React + TypeScript UIs with component-driven design, advanced state management, and reusable frameworks. Leverage AWS services (Lambda, API Gateway ...

Solutions Engineer

Hiring Organisation
Anson Mccade
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£65,000
Solutions Engineer: 5+ years experience in cloud-native development (Azure preferred) Strong software engineering background (C# and/or Python) Experience with REST APIs, event-driven architecture and microservices Experience with CI/CD pipelines, Git and modern testing practices Strong communication skills and confidence working with multiple stakeholders Location ...

Software Engineer (Backend, AI Systems)

Hiring Organisation
Locai Labs
Location
City of London, London, United Kingdom
experience, ideally working on backend systems, APIs, or AI-related products Proficiency in Python and JavaScript/TypeScript (Node.js) Strong understanding of backend architectures, REST/GraphQL APIs, and data modelling Experience with containerisation (Docker) and cloud platforms ( GCP , AWS , or similar) Familiarity with LLM or AI APIs Exposure ...

Automation Assurance Specialist

Hiring Organisation
83zero Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£55,000
gain experience across a broad technical landscape, including but not limited to: Java, JavaScript, Node.js, Kotlin Spring Boot and RESTful microservices Selenium, Playwright, Cucumber, REST testing NoSQL databases Git-based version control systems Your Profile Essential experience: ISTQB Foundation certification (or equivalent experience) Strong experience in functional, integration, exploratory ...

Software Engineer, Frontend

Hiring Organisation
Travelex
Location
City of London, London, United Kingdom
Demonstrated fluency with TypeScript, React and frameworks such as NextJS Familiarity with state management libraries (Zustand, Redux, MobX etc.) Experience working with GraphQL/REST APIs Knowledge of the web platform, including HTML, CSS and Browser APIs Experience with the testing pyramid and tools such as Vitest, Jest, Playwright Understanding ...

Full Stack Lead Engineer

Hiring Organisation
InfoSec People Ltd
Location
City of London, London, United Kingdom
practical Generative AI tooling to ship better, faster What we’re looking for Strong hands-on experience across TypeScript/React/Node/REST APIs AWS experience (serverless is ideal): Lambda, SQS, S3, Cognito, API Gateway, EventBridge Microservices + event-driven patterns PostgreSQL plus at least one of DynamoDB ...

Senior ServiceNow Developer-HRSD

Hiring Organisation
Nelson Frank
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £75000/annum
pages that are intuitive, accessible, and mobile-ready. Integrate & optimise Integrate ServiceNow with HR and enterprise systems (HRIS, payroll, IAM, document management) using REST/SOAP APIs and IntegrationHub. Support data migration, synchronisation, and data integrity across platforms. Collaborate & support delivery Partner with HR stakeholders to understand requirements and translate ...

Full Stack Engineer

Hiring Organisation
ClearWatt
Location
City of London, London, United Kingdom
support ClearWatt’s growing product suite. What We’re Looking For 2+ years of professional experience with C# and .NET Core . Experience building REST APIs or microservices at scale. Familiarity with cloud-native design and Azure services . Understanding of async programming, dependency injection, and distributed systems. Strong grasp ...

Application Security Engineer

Hiring Organisation
Atrium Global
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £550 to £650 per day
strengths and weaknesses of each At least one programming language (e.g. Java, Go) At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. shell, Python) Some other highly valued skills may include: Experience with CI/ ...

Scala Developer - Remote Contract - Immediate Start

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 React Native Engineer - London Hybrid : £100-120k+

Hiring Organisation
Hunter Bond
Location
City of London, London, United Kingdom
What You Bring 5+ years’ experience delivering production mobile apps for iOS and Android. Strong expertise with iOS/Android SDKs, remote data handling (REST/JSON) and third-party integrations. Solid understanding of mobile architecture, trends and best practices across the entire development lifecycle. Clear, confident communication skills — written ...

Golang Engineer

Hiring Organisation
Few&Far
Location
City of London, London, United Kingdom
async, multithreading & concurrency/parallelism Have a solid understanding of gRPC and building code for microservices-based architectures Familiarity with building and maintaining REST APIs Proficient in using non-relational databases (ideally MongoDB) Have experience with Kafka or similar message brokers Have had exposure to CI/CD environments, utilising ...

Lead Software Engineer, React Native

Hiring Organisation
Travelex
Location
City of London, London, United Kingdom
shipping complex mobile applications to production Comfortable mentoring peers and supporting technical decision-making. Solid understanding of API integration (GraphQL and/or REST). Strong communication skills — able to work effectively with engineers, product managers, and designers. Experience with native modules and bridging in React Native Familiarity with state ...

ServiceNow HRSD Implementation Specialist

Hiring Organisation
Nelson Frank
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£70000 - £80000/annum
customized workflows aligned to client needs Integration & Data Management Integrate ServiceNow with external systems such as CRMs, HR platforms, and eCommerce solutions using REST/SOAP APIs and IntegrationHub Manage data migrations and ensure consistency across ServiceNow modules and external systems Work with workflow data fabric and RaptorDB to maintain ...

IRM ServiceNow Architect

Hiring Organisation
HCLTech
Location
City of London, London, United Kingdom
Management (CSM). Integration Design: Design and oversee the implementation of complex integrations between ServiceNow and other enterprise systems, leveraging various integration methods (e.g., REST, SOAP, JDBC, MID Server). Technical Oversight & Quality Assurance: Provide technical oversight to development teams, ensuring adherence to architectural patterns, coding standards, and performance best ...

Full-Time Mobile App Developer (iOS & Android) — Remote (Europe / Asia)

Hiring Organisation
Astera
Location
City of London, London, United Kingdom
Equivalent cross-platform frameworks considered if well justified.) Proven experience implementing apps directly from Figma Strong mobile UI/UX implementation skills Experience with REST APIs, auth flows, and state management 👉 We’re comfortable with AI-assisted development tools (e.g. Base44, Copilot, etc.) where they improve delivery speed and quality. ...

Senior Backend Engineer Python

Hiring Organisation
Plexus Resource Solutions Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent
backend systems that form the backbone of Web3-first products. Your work will directly shape how users interact with blockchains, smart contracts, DAOs and REST APIs enabling high-performance, reliable and secure services at scale. Role: Architect and build backend systems for Web3 products. Develop and maintain RESTful APIs using ...

ServiceNow Developer (contract)

Hiring Organisation
Nelson Frank
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £900/day
environment Strong hands-on experience with JavaScript and ServiceNow scripting Experience with one or more ServiceNow modules (e.g. ITSM, ITOM, HRSD, CSM) Experience with REST/SOAP integrations and APIs Good understanding of ServiceNow architecture and data model Ability to work independently in a contract role Desirable: ServiceNow certifications ...

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 ...

Data Engineer - £350PD - Remote

Hiring Organisation
Tenth Revolution Group
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£300 - £350/day
HTML, and DOCX Data Integration Familiarity with SAP data structures is beneficial Integration with PIM (Product Information Management) systems Design and consumption of REST APIs Programming & Querying Python (advanced): pandas, numpy, boto3, and data processing best practices SQL (advanced): complex queries, performance tuning, and query optimization Data Quality & Governance Data ...

Artificial Intelligence Engineer Intern(Applied GenAI)

Hiring Organisation
NetMind.AI
Location
City of London, London, United Kingdom
spin up a UI in Streamlit blindly. (Experience with Gradio/Chainlit is also fine). API Experience: You are familiar with calling REST APIs and handling JSON data. Problem Solver: You can take a vague requirement from a BD (e.g., "Analyze this report") and turn it into a technical ...

Senior Identity Systems Engineer

Hiring Organisation
Sky
Location
City Of Westminster, London, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
familiarity with standards such as ISO27001, NIST, and CIS, with experience conducting audits and implementing controls. Solid grasp of Web APIs including SOAP, REST, and GraphQL, and their role in IAM integrations. Excellent communication, organisational, and stakeholder management skills, with the ability to work autonomously on complex projects. Team overview ...