Lead Fullstack Engineer

Ai-powered
Spain
4 days ago
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Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Experience required
8 years minimum
Working hours
Regular working hours

Tech stack

XML Schema Agile Methodology Artificial Intelligence Microsoft Azure Software as a Service Continuous Integration JSON Node.Js Ui Patterns Next.js Software Engineering TypeScript
+9 more
Test-Driven Development (TDD) ReactJS Backend Build Management Front End Software Development Restful APIs Grpc Web Architecture Api Management

Job 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.

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., * 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.

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Good distractions

Talks and stories from around this role — technically off-topic, practically not.

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Establishing internal service communication with gRPC

Florian Bader Florian Bader · World Congress 2026 Europe

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Exploring JSON, CBOR, and JOSE for data serialization

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Structuring and scaling the backend engineering team

Stefan Lingler Stefan Lingler +1 · Coffee With Developers

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Discussing daily roles in frontend and full stack development

Chris Heilmann +1 · LIVE

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Transitioning into backend engineering from web development

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Evaluating architectural trade-offs between REST and gRPC

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