Schroders★4.0 (47)· London

You will work with React.js, Next.js, Node.js, cloud-native technologies, CI/CD, and AI-assisted tools. The team builds and supports digital platforms for content management, search, analytics, and client engagement. No team size is stated.

You'll work with .NET/C#, Python, TypeScript, NX Monorepo, CI/CD, AI-powered tooling, contract testing, and containerised testing (Testcontainers). The role defines and builds testing architecture, reusable frameworks, and developer tooling for a strategic Global Markets Front Office trading platform at a leading investment bank.

A Senior Full Stack Engineer role as Engineer #2 at a pre-seed AI startup building an AI platform for pharma commercial teams, using Python, FastAPI, TypeScript, Next.js, Azure, MongoDB, Elasticsearch, and Neo4j. Work includes data pipelines, AI-powered search, analytics, and enterprise workflows. The role requires experience on a data/AI-heavy B2B product, regulated industry exposure, and comfort on a tiny engineering team.

Work with React/Next.js, Python (Django/FastAPI), Redis, Celery/RQ, Docker, Kubernetes, and cloud infrastructure (AWS/GCP/Azure). You'll build an AI data-integration and analysis platform that automates document processing for enterprise financial environments. The role includes end-to-end feature ownership and mentoring junior engineers as the team scales.

Build scalable backend systems, APIs, data pipelines, and DevOps practices using Python or full-stack JavaScript, integrating voice, reasoning, and context management. You will ship end-to-end product features for an AI layer designed to autonomously run small businesses for thousands of customers.

You will work with React, React Native, Node.js, TypeScript, SQL, AWS, and cloud-native AI-powered products. The company is a Series A–funded, fast-growing tech business building products that matter and planning to double in size. This Staff Engineer role owns business-critical product areas and mentors engineers while remaining deeply hands-on.

Join a pre-seed voice AI startup as a Junior Fullstack Engineer, working with Python, AWS, and Kubernetes to build integrations, API fixes, and SDKs for enterprise clients. You'll support the Forward Deployed Engineering team deploying voice infrastructure across Africa and the Middle East.

Build and deploy production-grade agentic systems and RAG pipelines with Python, TypeScript, FastAPI, and React. As a founding engineer, lead architectural development of an AI-driven agency model replacing traditional property-market manual workflows with autonomous agents.

You will own back-end infrastructure and data strategy, building scalable GCP pipelines and APIs using Python and FastAPI, plus full-stack features. BlakBear is an Imperial College spin-out building advanced gas sensors and AI that predict food freshness in real-time to replace use-by dates.

Work with JavaScript, Vue.js/React/Angular, HTML/CSS, and Figma to build scalable UI components. Join TransPerfect’s TechOps team, which delivers technology and interfaces for the company’s GlobalLink platform.

Build mission-critical software for a UK defence AI programme using Python, Java, React, MongoDB, Kubernetes, VMware, and AWS/Azure. You will join a multidisciplinary engineering team delivering secure, full-stack solutions.

You will work with Java 17+, Spring Boot, Oracle SQL, document store DBs, Kubernetes, Jenkins, and GitHub Copilot. The investment bank team builds mission-critical, high-performance systems providing end-to-end visibility into payment lifecycles for technical, operations, and reporting teams.

You'll work primarily with Python (≈70%) and TypeScript, building backend services, APIs, and data-intensive systems on AWS with PostgreSQL and event-driven architecture. This early-stage climate tech company is building a new platform that combines real-time data, AI, and energy trading to support the transition to a cleaner electricity grid. You'll join a small engineering team where you'll own features end-to-end and have meaningful influence on product and technical direction.

Work with Cypress, Playwright, Selenium, Appium, Postman, Jira, and Git to build and maintain automated test suites integrated into a CI/CD pipeline. As part of Reset Health's QA team, you will design manual and automated tests for web and native mobile apps while helping transition to greater automation and AI under an ISO13485 QMS.

NatWest Group★3.7 (1.2k)· London

You will work with React, Java, Spring Boot, REST APIs, Kafka, IBM MQ, iOS, and Android, applying test-driven development and Agile practices. As a member of a permanent feature team, you will design, develop, and test software for the bank’s platform, collaborating with engineers and architects.

Design software using Java, C#, Python, JavaScript, TypeScript, or Go, with REST APIs, microservices, SQL databases (PostgreSQL, SQL Server, MySQL, Oracle, MongoDB), and cloud platforms (AWS, Azure, GCP). You will build enterprise applications and business-critical services across the full development lifecycle.

Develop mobile apps in React Native (iOS/Android) with TypeScript, Expo, and Jest, integrating with Ruby on Rails backend services over a JSON API and Postgres. You will join the product team building a market-leading platform that manages the end-to-end installation of home energy solutions like boilers, heat pumps, and solar panels for brands such as BOXT and E.ON Next.

Bionic Group★2.9 (27)· London

You will work with Node.js/TypeScript, Ruby/Rails, Nuxt, AWS CDK, and Salesforce, building backend services and customer-facing frontend applications. As part of Bionic’s “In Life” squad, you’ll help improve Digital Renewals customer journeys for their SME business comparison and switching service.

You will work with AWS (WAF, CloudFront, CloudTrail, GuardDuty, Secrets Manager), WorkOS/AuthKit, and CI dependency-audit tools. The team builds Palette, an urban-planning platform for biodiversity and resilience gain, owned by Kew Reach (a joint venture with Royal Botanic Gardens Kew). This is a founding sole platform-engineer role, reporting to the CEO.

A full-stack engineer at an AI-powered insurance platform, working in TypeScript, Python, and AWS. You will build and debug production code across the stack, integrating APIs and configuring partner insurance offerings. You will be one of the first UK engineering hires, working hands-on with a small team to extend the platform and keep integrations live.

Work with Svelte/TypeScript, Python (FastAPI, Django), PostgreSQL, and AWS. Tab is a YC-backed London travel fintech building a payments platform for 100,000+ global tourism businesses, processing thousands of real-time transactions per hour. You will develop features across the stack and collaborate in a tight-knit engineering team.

Build with React Native, TypeScript, Python, and Supabase, deploying on Railway. You will lead technical development of a mobile-first AI platform that helps young people with financial planning and career coaching.

Work with Svelte, TypeScript, Python (FastAPI/Django), PostgreSQL, and AWS. You'll build and scale a payments platform processing 100 currencies and a discovery engine listing 100,000+ tourism businesses. Join a profitable, lean team of nine as one of the first developers.

You'll use Python, React, and TypeScript to build full-stack applications, backend services, APIs, and microservices. You'll develop real-time trading dashboards, analytics platforms, and data visualizations for an elite FinTech firm supporting trading and operational platforms.

Forward Deployed Engineer will use React, TypeScript, Node.js, and Python to build full-stack features, MVPs, and AI/ML solutions, including LLM prompting and voice/transcriber tuning, plus API and third-party integrations. The role supports HappyRobot’s AI platform, which builds and orchestrates AI workforces for enterprise operations. This position is customer-facing, requiring about 50-75% travel for onboarding, implementation, and ongoing support.