> Markdown version of [/jobs/ext/8624-senior-fullstack-engineer](https://www.wearedevelopers.com/jobs/ext/8624-senior-fullstack-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Fullstack Engineer - **Company:** Lingo - **Location:** Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Software Bug Management, Databases, Data Structures, PostgreSQL, Routing, Node.Js, Open Source Technology, Systems Integration, TypeScript, Encapsulation (Networking), Web Applications, Network Routers, ReactJS, Express.js, Backend, Webpack, Material UI, Cloudflare, Virtual Agents, Api Design, Web Api - **Published:** May 20, 2026 - **Apply:** https://es.indeed.com/viewjob?jk=329d3b4cdd877612 ## About the Role Do you have experience in React?, * Built an own app, or side project that others have used - could be a tool for a friend, a small product, an open-source package, anything real people relied on * 5+ years of production experience with TypeScript and Node.js * Expert React knowledge - Suspense-first patterns, skeleton loaders, loading states * Experience with SSR, CSR, and SSG * Deep expertise with React routing libraries * Built or contributed to design systems / component libraries used by others * Experience designing navigation, onboarding flows, and user journeys * Backend experience with Node.js (Express.js or similar) and PostgreSQL * Experience designing production-ready APIs * Experience with authentication and authorization systems * CS degree or equivalent - algorithms, data structures, system design * Prior remote work experience in distributed teams * Available 7-10am San Francisco time daily * Fluent English * Deep knowledge of AI coding tools and workflows - you use them daily and know how to get the most out of them Optional Skills * Experience with Cloudflare platform (Workers, etc.) * Experience with Row-Level Security (RLS) in Supabase/PostgreSQL * Experience with background job workflows * Built an AI agent before * Contributed to a design system or React component library used by other teams * Experience with observability and monitoring * Open source contributions * Speaking multiple languages is a plus * You love Remix, React Router, TanStack Router, or TanStack Start, * You are looking for passive, hands-off remote work with minimal team interaction * Uncertainty makes you uncomfortable - you prefer detailed specs over figuring things out as you go * You are unwilling to prioritize customer needs over your preferred patterns or tools ## Description * As part of a team of senior engineers, design, develop, and grow the Lingo.dev products + Web applications - Routing, navigation, onboarding flows, user experience, performance + Open source tools - CLI, webpack/vite plugins + Backend APIs - encapsulation, API design, security + Database layer (PostgreSQL) + Integrations - with 3rd party systems + AI agents * Take full ownership of features from design to deployment: draft technical designs, review with founders + the team, implement end-to-end with tests and documentation * 3 sprints of product roadmap work, 1 cooldown sprint (customer feature requests, improvements, bug fixes) * Weekly Demo Days with the rest of the team, After passing the interviews, there's a one-month paid trial period. It's intense - we'll work closely together on real features to make sure we work well together. ## Related Videos - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Web APIs you might not know about](https://www.wearedevelopers.com/videos/281-web-apis-you-might-not-know-about) - [Micro Frontends with Module Federation: Why and How?](https://www.wearedevelopers.com/videos/165-micro-frontends-with-module-federation-why-and-how) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Project Fugu: Extending the web](https://www.wearedevelopers.com/videos/832-project-fugu-extending-the-web) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025)