Lovable★4.0 (43)· London

Uses Go, Rust, TypeScript; AWS, Azure, Google Cloud, Cloudflare; Kubernetes, Terraform, Temporal, OTEL, CI/CD; PostgreSQL, ClickHouse, Firestore, Spanner, BigQuery. Builds the platform for Lovable Enterprise enabling secure, cloud-agnostic deployment, defining architecture for sandboxing, networking, encryption, identity, and mentoring engineers.

Work with Kotlin, Java, Spring Boot, microservices, REST APIs, Node.js, TypeScript, Express.js, Nunjucks, AWS/Azure/GCP, Docker, Kubernetes, Terraform, and CI/CD tools. You'll build secure, scalable digital services on large-scale transformation programmes for the Public Sector and Healthcare within Agile, multidisciplinary teams. Mentoring other engineers is expected.

Build and maintain the company’s platforms using JavaScript, Node.js, Next.js, Express.js, React/React Native, .Net 4.8/9/10, C#, HTML/CSS, and API Restful Services. You will develop both web and mobile applications, collaborating with the team while working independently.

Lovable★4.0 (43)· London

Build enterprise deployments using Go, Rust, and TypeScript on AWS, Azure, and Google Cloud, with Kubernetes, Terraform, and Temporal. You will build the platform that allows large customers to run Lovable securely and at scale across every major cloud provider.

You will work with Node.js, React, JavaScript, TypeScript, REST APIs, MySQL, Git, Next.js, Express.js, and Tailwind CSS, along with AWS or GCP cloud infrastructure. Mas & Pas Limited is the employer; no specific product or project is described in this listing.

Build React + TypeScript features end-to-end for an AI-native data orchestration platform. The stack includes Python/FastAPI, TypeScript/Express, serverless AWS, Docker, PostgreSQL, and DynamoDB. You’ll run rapid UI experiments and ship multiple times a day in a small, elite team.

Lead Front-End Developer with React and TypeScript, working on payment and point-of-sale technology for live events. Responsible for front-end architecture, design system, shared component library, payment flows, and real-time data integrations. Will mentor a small team and own tooling, standards, and CI/CD release pipelines.

American Express★4.1 (9.7k)· London

You will work with Kotlin/JVM, Java, React, Postgres, MongoDB, Redis, Docker, Kubernetes, and GitHub Actions. The Financial Insights and Tools group builds financial analysis software for American Express customers, powered by APIs and underlying platforms for web and mobile applications.

Work with Kotlin/JVM, Java, React, APIs, Postgres, MongoDB, Redis, Docker, Kubernetes, GCP GKE, AWS ECS/EKS, Ktor, Spring, and GitHub Actions. The Financial Insights and Tools group builds customer-facing web and mobile features that aggregate and analyze financial data to enhance personal finance management.

American Express★4.1 (9.7k)· London

Work with Kotlin/JVM, Java, React, Postgres, MongoDB, Redis, Docker, Kubernetes (GCP GKE, AWS ECS/EKS), GitHub Actions, Ktor, and Spring. The Financial Insights and Tools group within Digital Banking builds financial analysis and planning applications for American Express customers on web and mobile, powered by APIs.

Lead a team using React, Node.js, Express.js, AWS, SQL, NoSQL, Docker, Kubernetes, and Jenkins. You will design scalable, cloud-native microservices architectures as a Technical Lead for Version 1, a consultancy delivering IT solutions for global brands. This role oversees a development team and ensures adherence to best practices.

Full Stack Developer working with Node.js, Express, React, and MongoDB/Mongoose. You will contribute to BookMaker, the core platform for creating client books, building features to scale content production and developing AI-assisted content creation capabilities.

Version 1★3.9 (39)· London

Design and implement scalable software using React, Node.js, Express.js, AWS, SQL, NoSQL, Docker, Kubernetes, and Jenkins. As a Technical Lead, you will architect solutions, mentor development teams, and guide projects for Version 1, an IT consultancy delivering digital solutions for global brands.

You'll develop and deploy scalable backend systems using Node.js, TypeScript, GraphQL, REST, Kafka, Redis, Docker, Kubernetes, and Azure Cloud. The xAPI team builds experience APIs powering Tesco's online shopping across web, mobile, in-store, and voice platforms, handling traffic for product discovery, purchase, and returns affecting tens of millions of customers globally. You'll work in an agile engineering team collaborating with product managers on high-performance, observable systems at scale.

You will work with React, Tailwind, Node.js, tRPC, PostgreSQL, and Elasticsearch to build and scale a B2B property data platform that integrates thousands of data sources. As a hands-on lead, you will provide architectural oversight across frontend, backend, and data infrastructure while mentoring senior and mid-level engineers.

TP ICAP★3.1 (34)· London

You will work with C#, TypeScript, React, SQL, RESTful APIs, AWS, Docker/Kubernetes, GitLab CI/CD, and microservices to design and maintain full-stack applications. The team builds scalable applications powering critical business functions within TP ICAP, a global interdealer broker providing market infrastructure and data solutions.

You'll work with Python (FastAPI), Go, TypeScript, PostgreSQL, Redis, Pinecone/pgvector, AWS (ECS, Lambda, SQS), Docker, Kubernetes, Terraform, LangChain/LlamaIndex, vLLM, and Anthropic/OpenAI APIs. You'll build and optimize RAG pipelines, real-time inference APIs, and vector search infrastructure powering LLM features for 500k+ monthly active users.

You'll use TypeScript, Node.js, React, Tailwind, Express, Azure, Postgres, Docker, GitHub Actions, Terraform, and Claude Code to build agent-native risk infrastructure — continuous risk management and trust delivered by AI agents. As a founding product engineer at a seed-stage AI security company, you'll own the entire product surface from UI to API and agent-powered features.

Develop web applications using HTML5, CSS3/SCSS, JavaScript/TypeScript, React.js or Next.js for the front end, and Node.js with Express.js for the back end, along with Strapi CMS. As part of a multidisciplinary Agile team, you will build and maintain modern digital services and CMS-driven websites aligned with GDS standards.

Senior UI Platform Engineer role at Jain Global using React, TypeScript, Vite, Next.js, Ant Design, AG Grid, Datadog, OpenTelemetry, Grafana, Microsoft Entra ID/Azure AD, and npm packages. The Core Platform team builds reusable frontend foundations—shared UI packages, application scaffolding, authentication/authorization integration, developer tooling, and internal platform applications (onboarding, access, service discovery).

You'll work primarily with React and TypeScript on the frontend, and Python (FastAPI/Flask) on the backend, using tools like Storybook. The Monolith AI Engineering Team builds the core platform for engineering simulation and AI workflows, aiming to become a super-intelligent AI test lab for the engineering industry.

Build and ship Python services using FastAPI, SQLAlchemy, OpenTelemetry, Procrastinate, PostgreSQL, Liquibase, Docker, and AWS to automate finance and operations workflows — including reconciliations, reporting, and payments — for a UK consumer lending fintech. This is a hands-on engineering role on a small, high-impact team.

Work with Python (FastAPI, SQLAlchemy, OpenTelemetry, Uvicorn), Postgres, MySQL, Docker, CI/CD, Git, RESTful APIs, and cloud infrastructure on AWS, GCP, or Azure; existing frontend stack includes Angular and TypeScript. Design and develop backend services that automate core financial operations—payments, reconciliations, and reporting—for a consumer lending platform using AI and Open Banking data.

Lovable★4.0 (43)· London

Lovable is an AI-powered software creation platform used by millions to build applications in any language. As a founding Forward Deployed Engineer, you'll work directly with ambitious customers using React, TypeScript, Golang, and Rust alongside LLM providers (Cloudflare, GCP, AWS) to design novel AI systems, translate real-world customer needs into product features, and shape this new function across engineering, product, and research. You'll own end-to-end projects influencing core platform direction with 5+ years full-stack experience and strong architectural thinking.

RELX Group★3.8 (133)· London

You will work with React, Node.js, Express, HTML, CSS, JavaScript, and RESTful APIs to build modern web applications for ScienceDirect, the world's leading collection of science information used by millions of researchers globally. The role emphasizes AI-assisted development workflows using tools like GitHub Copilot and Claude Code to accelerate design, implementation, testing, and debugging while maintaining strong engineering standards as part of a cross-functional agile product team.