1 to 25 of 42 React Jobs in the City of London

Senior Software Engineer C# Python AI

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Patterns and are comfortable with system design You understand what makes a good frontend and how to ensure connectivity between front and backend systems, React or Angular skills preferred You have a good understanding of cloud native architectures (Azure/AWS), event driven systems, microservices, CI/CD, Terraform, Kubernetes ...

Dynamics 365 CE Developer

Hiring Organisation
Amtis Professional Ltd
Location
City of London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£400 - 500 per day
SOLID principles and software design patterns Desirable Experience Healthcare or NHS environments Azure Health Data Services FHIR Infrastructure as Code Bicep, Terraform Angular or React Dynamics 365 F&O exposure Enterprise integration platforms and event-driven architectures What's Required? This role would suit a specialist Dynamics developer who enjoys ...

Apprentice Software Developer

Hiring Organisation
Reed Technology
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£20000 - £25000/annum
code quality. Required Skills & Qualifications: Experience with programming languages such as TypeScript, JavaScript, and Python. Interest in modern web development and frameworks such as React and Next.js. Understanding of backend development concepts with frameworks like Node.js, Python (Fast API, Flask, or similar). Basic knowledge of RESTful APIs and system ...

Founding Software Engineer Python - Start-up

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
software from scratch and iterate quickly You have strong technical skills, primarily with Python You have experience with RESTful APIs (they use FastAPI); TypeScript, React and other web technologies such as HTML5, CSS3 would be of benefit You have experience with LLMs and agentic AI, like to get your hands ...

Net developer

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£55000 - £60000/annum Negotiable
TeamCity. Concepts: Multithreading, async programming, SQL/NoSQL, automated testing. Nice-to-Haves Fixed Income or electronic trading domain knowledge. Exposure to JavaScript frameworks (React/Angular) or broader AWS services. Apply Now: Submit your CV for immediate consideration. Randstad Technologies Ltd is a leading specialist recruitment business ...

Net developer

Hiring Organisation
Randstad Technologies Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£55000 - £60000/annum Negotiable
Tools: AWS (EC2) , Docker, Git/TeamCity, SQL/NoSQL. Nice-to-Haves Fixed Income or electronic trading domain knowledge. Exposure to JavaScript frameworks (React/Angular) or wider AWS services. Apply Now: Submit your CV for immediate consideration. Fast 2-stage interview process! Randstad Technologies Ltd is a leading ...

Software Engineer

Hiring Organisation
Fortice
Location
City of London, London, United Kingdom
stack, with strong backend or cloud experience the priority. Backend: Python, Java, C++, C# or Rust Cloud: AWS, Azure or Kubernetes Frontend: TypeScript or React (nice to have) Who They're Looking For They want genuine problem solvers who enjoy working closely with customers and colleagues. As part ...

Senior AI Engineer

Hiring Organisation
Aimtech Recruitment Ltd
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Hybrid and requires onsite attendance in Central London 23 days per week. Technical Skills C#, ASP.NET Core, Entity Framework Python, FastAPI JavaScript, TypeScript React or Angular REST APIs, Swagger/OpenAPI SQL Server, PostgreSQL, NoSQL and vector databases Azure App Services, Azure Functions, API Management Docker, Kubernetes (AKS) Azure DevOps … Design, develop, and maintain scalable full stack applications across cloud and web technologies Build responsive front-end applications using modern JavaScript frameworks such as React or Angular Develop secure and scalable back-end services, APIs, and integrations using .NET, Python, and Azure services Design and implement AI-powered solutions including ...

Principal Software Engineer - C#

Location
City Of London, England, United Kingdom
.NET host), comfortable with WebSocket bridges, local service APIs, or IPC mechanisms to connect web UIs with native desktop applications. Sufficient front‐end literacy (React, TypeScript, Node) to make architectural decisions, review code, and collaborate effectively with dedicated front‐end teams. Demonstrated ability to leverage coding agents in spec‐driven ...

Principal Software Engineer - C#

Location
City Of London, England, United Kingdom
custom .NET host); comfortable with WebSocket bridges, local service APIs, or IPC mechanisms to connect web UIs with native desktop applications.Sufficient front-end literacy (React, TypeScript, Node) to make architectural decisions, review code, and collaborate effectively with dedicated front-end teams.Demonstrated ability to leverage coding agents in spec-driven development ...

Senior Software Engineer – AI Systems & Full-Stack Ownership

Location
City Of London, England, United Kingdom
application and integration layer for a new generation of AI-powered products. The role spans backend, API design, MCP integration and frontend development with React and TypeScript. You will design scalable REST/GraphQL APIs, implement agent-to-agent connectivity, and build production-grade frontend apps while collaborating with ...

Software Engineer C# .Net - Sports Trading

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90,000
have strong C# .Net, ASP.Net development experience You have a strong knowledge of databases (SQL or Oracle) You're comfortable with JavaScript/React You have a thorough knowledge of Computer Science fundamentals such as OOP, Design Patterns, Data Structures, Algorithms You are collaborative with excellent communication and stakeholder management ...

Front-end Software Engineer III

Location
City Of London, England, United Kingdom
coding hygiene and system architecture Required qualifications, capabilities, and skills Formal training or certification on software engineering concepts and advanced applied experience Proficiency in React, JavaScript/TypeScript, including automated unit/integration testing Respect for clean coding and best practices Hands-on practical experience in system design, application development ...

Software Engineer Full Stack - Start-up

Hiring Organisation
Client Server
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 95,000 Annual
Software Engineer/Full Stack Developer (Node TypeScript React Azure) Bristol/WFH to £95k Are you a senior Software Engineer looking for a genuine Greenfield opportunity where you'll shape architecture from day one? You could be joining a growing financial services business as they build a brand ...

Full-Stack C# Engineer: Architect Scalable Finance Apps

Location
City Of London, England, United Kingdom
architects, and engineers to implement microservices, APIs, and cloud-based solutions in a fast-paced, security-minded environment. The role requires strong TypeScript/React frontend skills, solid C# back-end experience with SOLID principles, and a good grasp of RESTful APIs, CI/CD, #J-18808-Ljbffr ...

Lead Engineer

Hiring Organisation
RJC Group
Location
City of London, London, United Kingdom
grasp of C# and some front end technology. Requirements) 5+ years of commercial experience in C# Some exposure to front end technology: Angular/React current experience working in a trading environment (financial, commodity etc) Understanding a full trade lifecycle Exceptional communication skills Ability to make both the product ...

Full Stack Developer

Hiring Organisation
Hays Technology
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£550 - £650/day £550-650
/week in office Duration - Initially 6 months Rate - £550-£650/day Inside IR35 via Umbrella Skills and Experience Required TypeScript, Next.js or React AWS and Terraform Experience providing feedback to engineering teams via code review Exposure to a wide range of languages, frameworks, and cloud technologies Core Competencies ...

Senior Frontend Engineer (m/f/d)

Location
City Of London, England, United Kingdom
APIs and ensure seamless data flow between frontend and backend systems. Build intuitive, performant, and responsive user interfaces using modern frontend frameworks such as React or comparable web component frameworks. Work closely with UX/UI designers to translate designs into functional applications. Ensure code quality, maintainability, and scalability through ...

Senior Frontend Engineer (UI/UX) -High Growth!

Hiring Organisation
Robert Half Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
future architecture of a rapidly scaling platform. What We're Looking For MUST FRONT END FOCUS WITH UI/UX Strong commercial experience with React, Next.js, TypeScript, HTML & CSS Proven ability to build high-quality, responsive user interfaces Experience translating Figma designs into production-ready code Strong understanding of frontend ...

Engineer C# (Full Stack)

Location
City Of London, England, United Kingdom
Group Overview The TP ICAP Group is a world‐leading provider of market infrastructure. Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of ...

Engineering Team Lead | Tech | London, UK

Location
City Of London, England, United Kingdom
Product roadmap Managing a team consisting of a range of skillsets and experience Full stack development, across Python/FastAPI services and React/TypeScript front ends Continuously improving the team's processes for iterative development, including embedding automated testing and CI quality gates into a fast-moving AI product … objectives and assisting with tailored development plans Our engineering environment includes technologies such as Python (FastAPI), LangChain/LangGraph for multi-agent LLM orchestration, React/TypeScript, PostgreSQL, MongoDB, Redis, Azure (App Service, Container Registry, Blob Storage), Docker, GitHub Actions, and modern CI/CD pipelines. About You: You will ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90000/annum
play a key role in building MCP integrations, agent-to-agent connectivity and robust API services, while also developing responsive, accessible interfaces in React and TypeScript. What you'll be doing Own the application and integration layer of AI products end to end, covering APIs, integrations, service boundaries and frontend … APIs using REST and/or GraphQL, including authentication, authorisation, versioning and streaming interfaces such as SSE or WebSockets. Build production frontend applications using React, TypeScript and JavaScript. Work closely with UX and product teams to turn designs into accessible, responsive and intuitive interfaces. Develop AI-specific user experiences including ...

Fullstack Senior Software Engineer (TypeScript, C#, AWS) 12 mnth Maternity Cover

Location
City Of London, England, United Kingdom
solve across a dual-stack C# and TypeScript backend, being intentional about choosing the right tool for the job. Implement microfrontend web applications in React and TypeScript, with an eye for component design and the UX implications of what you build. Take end-to-end ownership of features from early … Technology Stack We believe in using the right tool for the job. Our current stack includes: Backend: TypeScript, Node.js, C#, .NET Frontend: TypeScript, React Cloud & Infrastructure: AWS (ECS, Lambda, SQS, DocumentDB, DynamoDB), Terraform, SST (Infrastructure as Code) Architecture: Microservices, Microfrontends, Event-driven architecture What You Need to Be Successful ...

Senior/Lead Frontend Developer

Location
City Of London, England, United Kingdom
experienced Senior Frontend Developer to join their team in London on a hybrid basis. The Senior Frontend Developer will bring expertise in React and Next.js and will have a passion for building scalable user interfaces. We are looking for a hands on developer who will contribute towards/own frontend … architecture designs and quality code standards. You will design, develop and maintain high quality frontend features using React and Next.js. React/Next.js/JavaScript/TypeScript/App Router/Server/Rendering/Turbopack/Architecture Experience: Strong professional experience building applications with React and Next.js (ideally React ...