Senior Full-Stack Engineer (UI Platform Team)

About the role

BlackLine SaaS is the interaction system for finance and accounting teams, integrating with ERPs, CRMs, payment systems and point-of-sale systems. As a Senior Full-Stack Engineer on the UI Platform team, you will build and maintain the core App Shell and the services powering the micro-frontend ecosystem, acting as a bridge between domains with backend logic in Java and UI orchestration in React.

Key responsibilities

• Design and implement scalable features across the stack, from Java microservices to React-based front-end shells, ensuring seamless inter-app communication.
• Migrate legacy .NET applications to modern React-based solutions with a micro-frontend App Shell architecture.
• Build and maintain cloud-native infrastructure and deployment pipelines using Terraform, Jenkins and GitHub Actions.
• Write clean, secure and testable code, with unit and integration tests (JUnit for backend, Jest/Vitest/Playwright for frontend).
• Mentor junior engineers, conduct code reviews and share full-stack best practices.

Required profile

• 4-8 years of professional experience in full-stack software development.
• Experience managing the SDLC from stakeholder requirements to technical specifications and delivery.
• Ability to work independently on complex tasks, estimate deliverables and collaborate in an agile environment.

Required skills

• Java (OOP) and React with TypeScript.
• AWS, Azure or GCP, including serverless, managed databases and container orchestration.
• CI/CD tools such as Jenkins and GitHub Actions.
• Nice to have: micro-frontend experience (Webpack Module Federation) and build tools such as Vite and Rollup.

Candidates living within a reasonable commute to one of the offices work at least 3 days a week in the office. Salary range: PLN 254,000 - 318,000 per year.