1 to 25 of 115 Permanent React Jobs in the City of London

Data pipelines AI-powered workflows MVPs for new products Tools that reduce headcount pressure through automation Tech Stack (Flexible – but ideally) JavaScript/TypeScript React/Next.js Node.js Python (bonus) API integrations SQL/NoSQL databases Cloud (AWS/GCP/Azure) Automation tools (Zapier, Make, etc.) Git & modern ...

Sitecore, Optimizely, Umbraco, Alterian, Immediacy, Ektron, Kentico, Sitefinity or dotnetnuke. Our client can provide you with industry recognised training in: .NET 10.0, JavaScript, React, Angular 21, Microservices, MongoDB, Vue.js, TypeScript, Azure, AWS, ASP.NET Core Web API, Entity Framework, Node.js, Elasticsearch, Agile, TDD, BDD, Scrum, Kanban and MongoDB. This ...

Looking For 5+ years of professional software engineering experience Strong experience with TypeScript across frontend and backend Experience with modern frontend frameworks such as React, Next.js, or similar Experience building backend services with Node.js Proven experience working in fast-paced startup environments Strong understanding of system design, APIs, and scalable ...

emerging technologies (AI, automation, data services) that improve efficiency and insight. Tech Stack seeking: Full Stack Developer; Design and Build with C#, JavaScript Library (React.js bonus), API Development, SQL Server/Backend Development including ETL/Integration Azure DevOps (Repos, Pipelines, Boards, Artifacts, Test Plans), CI/CD automation, gated ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET Software Engineer to join their growing team! This ...

technologies. Collaborate within an agile engineering team, contributing to technical decisions and continuous improvement. Technology Stack C#/.NET Core/ASP.NET Core TypeScript, React Modern web and cloud architectures Requirements Commercial software development experience (typically 6+ years). Strong experience with C#/.NET and modern JavaScript/Typescript ...

Agile delivery processes. Experience with Terraform for infrastructure-as-code. Experience with Unit Testing, preferably with PyTest. Desired Skills and Experience: HTML/CSS React Typescript Experience using the FastAPI framework Roles and Responsibilities: Work as part of the central Orcas engineering team supporting multiple product teams with shared tooling ...

your future colleagues. Our tech stack: We use and leverage AWS, Cloudflare, and GitHub as much as possible. The codebase is written in TypeScript, React, Vite, TanStack, and Radix UI. We use Figma for wireframes and ideation. We are highly confident in our backend API schemas and functionality. What ...

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Commodities Brokerage and they are looking for a Senior C#, .NET Software Engineer to join their growing front office team ...

Desirable Experience Experience with C# and .NET-based services Experience integrating Microsoft Azure services Familiarity with modern front-end frameworks such as Angular or React Experience working in regulated or enterprise technology environments Working Environment This role sits within a collaborative Agile development environment and will involve working alongside experienced ...

Languages: C#/.NET (strategic direction) Python (current tooling base) Java or other OO languages also considered Cloud: AWS (current environment) Frontend: Angular Svelte React experience also relevant Data/Messaging: Strong database fundamentals (Postgres, ClickHouse or equivalent) Kafka or similar real‐time messaging technologies What We’re Looking ...

requirements • Contributing to testing, documentation and ongoing improvements across the team What we’re looking for • Expert in modern front-end tech - Vue (mandatory), React/Angular (nice to have) • C#/.Net - this will be a small part of the role but necessary • Experience working with component based development ...

person onshore/offshore engineering team • Architect and enhance scalable, secure cloud-native systems • Contribute directly to full-stack development across TypeScript, JavaScript and React • Improve delivery standards across CI/CD pipelines, DevOps practices and automated testing • Collaborate with the CEO and Product function to align technical delivery with ...

experience building full-stack production applications, having worked in high-bar engineering environments, particularly startups or scale-ups. Proficiency in modern web technologies, including React, TypeScript, and Node.js. Experience with backend development using Python. Strong knowledge of cloud infrastructure (AWS, GCP, or Azure) and scalable architectures. Understanding of AI-powered ...

security, performance and accessibility Skills, knowledge, and experience: Must have: 8+ years of experience in frontend development Demonstrated strong fluency with TypeScript, Next.js and React Experience with design systems, component libraries and Storybook Familiarity with state management libraries Experience with the testing pyramid and tools such as Vitest, Jest, Playwright ...

high-impact, early-stage product teams: you've shipped and scaled full stack products Strong backend (Node.js, Python/Flask, FastAPI) and frontend (React, Next.js, Vue) fundamentals ML/data science proficiency: Python, SQL, pandas, scikit-learn, PyTorch/TensorFlow Experience with cloud platforms (AWS, GCP, Azure) and containerisation (Docker ...

stage, hands-on role with significant autonomy and responsibility . You will own full-stack product delivery, from infrastructure and AI integrations through to React/React Native interfaces, collaborating closely with founders, creators, product, and design to turn lean specs into scalable, user-loved software. We’re looking … real mobile experience. Responsibilities Implement features end-to-end (mobile + web frontend → APIs → data models → integrations) while maintaining quality and velocity. Build React Native mobile apps and shared component systems across products. Design and ship scalable backend services (APIs, integrations, AI workflows). Run tight build → test → iterate → ship ...

Gutenberg and best practices Ability to create custom Gutenberg blocks Knowledge of PHP, HTML and CSS Front End development experience in JavaScript and React Knowledge of VCS and Git Ability to communicate your ways of working and collaborate with team members As a WordPress developer, this is a unique opportunity ...

portals. Strong background in full-stack development, with the ability to own an entire product from infrastructure to UI. Proficiency in Node.js or Python, React, PostgreSQL, and AWS. TypeScript a plus. Experience working in early-stage or small-team environments where autonomy and speed are essential. Familiarity with serverless architectures ...

/CD, Git, Jira, and modern DevOps practices Strong understanding of secure coding principles (OWASP) and performance optimisation Desirable: OAuth/OpenID, CloudFormation, React or Vue.js, healthcare interoperability standards (HL7, SNOMED, DM&D) Package: £72,000 + £3K on call Great benefits package Fully remote Lead Software Developer - Full Stack ...

looking for someone who is excited by this new era of software development and the opportunities it brings. Our core stack includes Typescript ( Node.js , React), MongoDB & Postgres. We use AWS for our cloud services and our infrastructure is managed with K8s and Terraform. We test with Jest and Cypress ...

with 2-3+ years leading or mentoring engineers Strong expertise in Python backend development with async patterns Production experience with modern frontend frameworks (React, TypeScript) Solid understanding of distributed systems architecture and API design Experience with container orchestration, CI/CD, and cloud platforms Experience with NoSQL databases ...

systems, and collaborate closely with product and design to elevate usability and responsiveness. As a Frontend Developer, you will have: Strong commercial experience in React with TypeScript Exposure to UI/UX principles and design collaboration Background in healthtech or data-driven applications Bonus: experience with Python/Django ...

/fullstack development using Node.js , Python , and AWS serverless architecture Strong database design skills (PostgreSQL, DynamoDB, Elasticsearch) Familiarity with frontend frameworks like Vue or React Comfortable mentoring developers and influencing technical direction Experience in financial services or a data-heavy B2B environment is a plus 🛠 Tech Stack: Node.js , Python ...

native product that is shaking up the industry 💫 Must have skills: You've ideally had 5+ years in Software Engineering using Typescript and React Experience using Python and Next.js is a very huge bonus You understand how startups operate and you want to join somewhere fast growing, using AI tools ...