> Markdown version of [/jobs/ext/2023814-lead-fullstack-engineer](https://www.wearedevelopers.com/jobs/ext/2023814-lead-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). --- # Lead Fullstack Engineer - **Company:** Ai-powered - **Location:** Spain (Remote available) - **Contract:** Permanent contract - **Skills:** XML Schema, Agile Methodology, Artificial Intelligence, Microsoft Azure, Software as a Service, Continuous Integration, JSON, Node.Js, Ui Patterns, Next.js, Software Engineering, TypeScript, Test-Driven Development (TDD), ReactJS, Backend, Build Management, Front End Software Development, Restful APIs, Grpc, Web Architecture, Api Management - **Published:** August 11, 2026 - **Apply:** https://www.jobleads.com/es/job/e2051a1bdcd95994ecb39740c4e8f0c9b ## About the Role * 8+ years of professional software development experience. * Strong expertise with TypeScript and React. * Hands-on experience with Node.js, Express, and modern backend development. * Experience building reusable frontend components, design systems, or shared libraries. * Solid understanding of frontend testing practices and tools. * Experience working on large-scale SaaS products. * Knowledge of REST APIs and modern web architecture. * Excellent communication skills and ability to collaborate effectively in distributed teams., * Experience with Next.js. * Hands-on experience with micro-frontend architecture. * Experience with gRPC and API integrations. * Knowledge of JSON Schema or XML Schema. * Experience with CI/CD pipelines and Azure DevOps. * Familiarity with Agile and Test-Driven Development practices. ## Description We are looking for a talented Senior Full-Stack Engineer to join a team building a modern, large-scale platform that powers intelligent agreement management experiences for millions of users worldwide. Our platform is at the heart of a global SaaS product used by more than 1.7 million organizations across 180+ countries. The team develops a unified, widget-based front-end architecture that enables seamless experiences across document creation, sending, signing, and management. By combining scalable engineering practices with AI-powered workflows, we are transforming the way businesses manage their most important agreements. As a Senior Engineer, you will play a key role in designing and developing high-performance, reusable frontend solutions while contributing to backend services and platform capabilities. You will work on complex engineering challenges involving micro-frontends, scalability, reliability, security, and developer productivity., * Design and build scalable, reusable UI components and frontend solutions using React and TypeScript. * Develop and maintain backend services using Node.js and Express. * Contribute to a modern micro-frontend architecture and shared platform capabilities. * Collaborate with cross-functional teams to deliver high-quality features in a fast-paced SaaS environment. * Write well-tested, maintainable code and contribute to a strong engineering culture. * Improve performance, reliability, observability, and security across the platform. * Participate in the entire software development lifecycle, including architecture discussions, implementation, testing, CI/CD, and production releases. ## Related Videos - [Exploring the Power of gRPC-Gateway for Writing RESTful Services](https://www.wearedevelopers.com/videos/2072-exploring-the-power-of-grpc-gateway-for-writing-restful-services) - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [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) - [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) - [Contract-First Frontend: Scaling Reliable UIs with OpenAPI and AI](https://www.wearedevelopers.com/videos/1995-contract-first-frontend-scaling-reliable-uis-with-openapi-and-ai) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift)