1 to 25 of 33 REST Jobs in the City of London

Principal Software Engineer

Hiring Organisation
83zero Ltd
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 110,000 - 130,000 Annual
Angular, or Vue) Strong backend development experience (e.g., Node.js, Java, Python, or Go) Proven experience designing and building scalable, distributed systems Strong experience with REST APIs, microservices architecture, and event-driven systems Cloud experience with Azure with knowledge of serverless and containerised architectures Solid understanding of DevOps practices, CI/ ...

Principal Software Engineer (Payments)

Hiring Organisation
X4 Technology
Location
City of London, London, United Kingdom
pipelines and cloud infrastructure Mentor developers and promote engineering best practices Tech Stack: Frontend: TypeScript, JavaScript, (React/Angular), HTML5, CSS3 Backend: Python REST APIs Data: MySQL, PostgreSQL, Redis Cloud & DevOps: AWS, Docker, CI/CD, Kubernetes (nice to have) Architecture: API design, OAuth/JWT authentication, queues, webhooks, payment ...

Data Engineer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £560 per day
platforms and services. Maintain data quality, security, and compliance across workflows. What you'll bring: Strong programming skills in Java. Hands-on experience developing REST APIs or microservices with Spring Boot. Experience containerising applications with Docker. Understanding of relational and NoSQL databases. Familiarity with modern data architectures (ETL/ ...

Full Stack Engineer /Software Engineer

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£60 - £80/hour Negotiable
Core Stack: React, Next.js, and TypeScript. Architecture: Micro-frontends (Capla/Vue) and Module Federation. Data: Integrating with Java/Spring Boot services via REST and GraphQL. Cloud & DevOps: Kubernetes (BKS), AWS, and advanced observability (Metrics, Dashboards, Alerts). What You Will Do End-to-End Ownership: Own the design ...

Automation QA Analyst

Hiring Organisation
Vallum Associates
Location
City of London, London, United Kingdom
automation testing using Selenium/Playwright/Cypress Proficiency in programming languages such as Java, Python, or C# Experience with API testing (Postman, REST Assured, or similar) Knowledge of testing frameworks (TestNG, JUnit, Pytest, etc.) Familiarity with CI/CD tools (Jenkins, Azure DevOps, GitHub Actions) Good understanding of SDLC ...

Senior Full Stack Engineer

Hiring Organisation
Access Computer Consulting
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £440/day
React, Kubernetes & Docker. Experience in building responsive, component based user interfaces using modern front end frameworks. Hands on expertise in API design and development (REST/JSON), including versioning and backward compatibility. Experience with UI testing, component testing, and front end build tooling. Experience in CI/CD pipelines, GitOps ...

Python Developer

Hiring Organisation
Roc Search
Location
City of London, London, United Kingdom
time data pipelines and event-driven architectures • Supporting production systems and driving performance improvements 🛠️ Core tech & experience: • Strong Python expertise (Django, FastAPI) • Experience with REST APIs, WebSockets, and real-time data integration • Cloud-native development (Azure preferred) • CI/CD, automated testing, and production support • Hands-on experience with ...

Web Developer

Hiring Organisation
Marks Sattin
Location
City of London, London, United Kingdom
Bring Strong front‐end engineering fundamentals with 3+ years’ web development experience Proficiency in Angular (v20+), TypeScript, HTML, and CSS Experience consuming and integrating REST APIs Familiarity with Git‐based source control and collaborative development workflows Experience working with Azure services, including Azure SQL and cloud‐hosted applications Exposure ...

Backend Software Engineer Java Kafka - Tech Consultancy

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£90,000
have Java development skills including multi-threading and concurrency You have experience with SpringBoot and microservices environments You have a good knowledge of REST APIs You have experience with Kafka (or similar messaging tools) You have a good understanding of AWS You have a thorough understanding of software development ...

Workflow Developer

Hiring Organisation
Shaw Daniels Solutions
Location
City of London, London, United Kingdom
Create SQL queries, stored procedures, scripts, views, and data routines to support workflow logic, reporting, and system optimisation. Design integrations between systems using APIs, REST services, and approved integration tools. Implement development standards, version control practices, and technical documentation aligned with firm‐wide governance. Business Engagement & Requirements Work closely with ...

Technical Lead / Solution Engineer

Hiring Organisation
I3 Resourcing Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Sales Cloud) experience Proven background as a Technical Lead/Solution Architect/Solution Engineer Experience with: AWS (Glue, AppFlow) Java development API integrations (REST/SOAP) CI/CD pipelines & cloud deployment (AWS/Azure) Experience working across business requirements/user journeys (BA background beneficial) Strong understanding ...

Mid-Level .NET / Full Stack Developer – Hybrid – £450/day Outside IR35 | C# | Azure | Event-Driven Systems | Payments | API-Driven

Hiring Organisation
VirtueTech Recruitment Group
Location
City of London, London, United Kingdom
systems What we’re looking for Experience developing applications with .NET/C# Exposure to cloud platforms such as Azure Experience building or consuming REST APIs Understanding of microservices or event-driven architectures Experience working in agile engineering teams Interest in building high-scale transactional systems Mid-Level .NET/ ...

Senior Rust Engineer

Hiring Organisation
Cititec
Location
City of London, London, United Kingdom
Tokio/async-std). Strong systems programming skills, including memory management, concurrency, and lock-free structures. Experience with Test-Driven Development. Familiarity with REST APIs, source control, CI/CD pipelines, and cloud environments (Azure preferred). Self-driven, with an ownership mindset and strong communication skills. Comfortable working ...

Senior AI Engineer

Hiring Organisation
Harnham
Location
City of London, London, United Kingdom
operate AI‐first products that deliver measurable value. • Develop and deploy production‐grade AI agents on GCP using ADK, integrating with internal systems via REST and JSON APIs. • Build and maintain robust evaluation and monitoring frameworks, including online and offline testing, A/B experiments and performance dashboards. • Integrate ...

Software Engineer

Hiring Organisation
Executive Integrity | B Corp™
Location
City of London, London, United Kingdom
looking for: 4+ years+ of software engineering experience in C++, C#, .NET and Python Experience with communication protocols — TCP/IP, UDP, REST Hands-on with event-driven architecture or event-streaming services Experience with microservice development, Docker or Kubernetes Background in distributed systems and networks — IoT or Industry 4.0 ...

Test Director ALM/QC

Hiring Organisation
Infoplus Technologies UK Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £800 to £850 per day
Technical Expertise (Exceptional Level) 2025+ years in QE engineering, transformation, and automation leadership. Mastery of: o Playwright, Appium, Selenium, Cypress, Java o API Automation (REST Assured, Karate, Postman) o Performance (JMeter, LoadRunner) o Cloud native testing (Azure, AWS, GCP) o Test orchestration, CI/CD pipelines o TDM, environment strategy ...

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 ...

Software Engineer

Hiring Organisation
trg.recruitment
Location
City of London, London, United Kingdom
Enablement (x2) – Bristol-based What I am Looking For Strong commercial experience with .NET/C# Fintech or Payments background required. Solid understanding of REST APIs, microservices, and cloud-based architectures Experience working with frontend programming languages (React or Angular) Ability to pick up context quickly and contribute from ...

Senior Integration Engineer

Hiring Organisation
DGH Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90,000
preventative improvements. Required Skills: * Strong experience building enterprise integrations, preferably using Workato (although will consider other integration tool experience). * Demonstrated expertise with APIs (REST/SOAP), authentication methods, and data transformations. * Experience working in Agile/Scrum environments. * Strong problem-solving skills and ability to communicate technical concepts ...

Data Integration Engineer

Hiring Organisation
GlobalLogic
Location
City of London, London, United Kingdom
export services, ETL, reconciliation, profiling scripts Data quality assessment Apache Kafka PostgreSQL for data modelling, query design, migrations etc Data modelling and schema design REST API design Ideally you will have: Experience of C# to be able to contribute to existing service/integration codebase Memgraph or other graph databases ...

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 ...

Workflow Developer

Hiring Organisation
Lynx Recruitment Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£65,000
across core business systems. Create and optimize SQL queries, stored procedures, and data routines to support workflow logic and reporting. Develop integrations using APIs, REST services, and approved low-code or integration tools. Gather, analyse, and translate business requirements into technical specifications with clear acceptance criteria. Maintain technical documentation ...

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 ...

Integration Architect

Hiring Organisation
Brickendon Consulting
Location
City of London, London, United Kingdom
technical details. Knowledge and Experience Minimum 5 years in data integration architecture, covering both batch and real-time patterns. Experience with Salesforce integration: APIs (REST, Bulk, Streaming), platform events, and data replication patterns. Knowledge of CDC mechanisms: database log-based CDC, trigger-based CDC, and timestamp-based extraction. Experience with ...

Senior Software Engineer

Hiring Organisation
TogetherWeTech
Location
City of London, London, United Kingdom
solutions. Their environment is Golang (Must have experience) Lead the architecture and design of complex systems, ensuring scalability, reliability, and performance. Strong expertise in REST API, OO and functional design principles, design patterns Mentor and provide technical guidance to junior engineers, fostering a culture of continuous learning and growth. ...