Senior Fullstack Developer - FreelancerSKILLS: Node.js | Angular | Auth0 |B2B: PLN 140 - 160 / Hour 💰LOCATION: REMOTE (POLAND)START DATE: 01.12.2025DURATION: 1 monthKey Duties and Requirements: A Roadmap to Your Professional Success 🚀Scope of responsibilities: Design, build, and maintain scalable backend services using Node.js Develop APIs and microservices to support frontend and mobile applications Ensure high performance and responsiveness of backend systems Design and Implement Frontend features using Angular and ensure high performance, responsiveness, and a great user experience. Auth0: Hands-on experience integrating and configuring identity and access management (IdM) in Node.js / Angular applications. Implement and manage API key security mechanisms for third-party service integration and internal service-to-service communication. Collaborate with product owners and other developers to define, design, and ship new features. Conduct code reviews to maintain high standards of code quality, performance, and security across the stack. Maintain high standards for documentation, security, and deployment processes Here’s a set of skills we require: 5+ years of professional development experience, with a strong focus on Fullstack roles. Expert proficiency in Node.js for building scalable backend services (RESTful APIs). Proficiency in Angular for complex, single-page application development. Mandatory hands-on experience with Auth0 for implementing secure authentication and authorization Architecture: Ability to work with existing codebases, suggest improvements, and maintain clean code standards