PROJECT INFORMATION:• Industry: Manufacturing industry• Location: 100% remote • Project length: Long-term• Start: January at the earliest• Business trips: Occasional• Assignment type: B2B• Rate: 170-190 PLN/h• Languages: English/PolishThe Fullstack Engineer builds and maintains shared front-end and back-end application frameworks that serve as the foundation for multiple product teams. This role combines deep technical expertise with a platform mindset to enable scalable, maintainable, and consistent software development across the organization.Responsibilities: Build and maintain shared front-end and back-end application frameworks. Develop reusable framework components and APIs for service-oriented architecture. Document framework features and facilitate onboarding materials for teams. Mentor development teams to promote best practices in framework utilization. Embed automated testing and CI/CD integration into the framework architecture. Must Haves: Proficiency in React and .NET (8+ years of experience) Experienced with building and maintaining application frameworks and tools. Expertise in TypeScript and frontend architecture Experience in designing APIs and reusable framework components Nice to Haves: Familiarity with component libraries and Storybook Experience in implementing backend tools to enhance developer workflows Knowledge of testing frameworks and CI/CD processes Other Details: Team Structure: Collaborates with multiple product teams. Documentation: Maintains detailed framework documentation. Mentorship: Responsible for mentoring and supporting developer teams.