> Markdown version of [/jobs/ext/2048867-lead-fullstack-engineer-react-next-js-5392](https://www.wearedevelopers.com/jobs/ext/2048867-lead-fullstack-engineer-react-next-js-5392). 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).

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# Lead Fullstack Engineer (React+Next.Js) (#5392)

- **Company:** N-Ix
- **Location:** Santiago de Compostela, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** XML Schema, Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Microsoft Azure, Software as a Service, Continuous Integration, JSON, Microsoft Office, Node.Js, Ui Patterns, Next.js, Software Engineering, TypeScript, Extensible Markup Language (XML), Test-Driven Development (TDD), ReactJS, Backend, Build Management, Front End Software Development, Restful APIs, Grpc, Web Architecture, Api Management
- **Published:** August 14, 2026
- **Apply:** https://www.buscojobs.com.es/lead-fullstack-engineer-react-next-js-5392-en-santiago-de-compostela-ID-367051381

## 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.
Nice to Have:
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.
#J-*****-Ljbffr

## Description

European Union, LATAMWork type:Office/RemoteTechnical Level:LeaderJob Category:Software DevelopmentProject:Leading platform for electronic agreementsWe are looking for a talentedSenior Full-Stack Engineerto 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.Responsibilities: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.Requirements: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.Nice to Have: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.#J-*****-Ljbffr


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