Fullstack Developer

B3 Consulting Poland is part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, the company operates with full autonomy, choosing its technologies, processes, and ways of working, delivering IT projects both in Poland and internationally across a wide range of industries and technologies.

• 5+ years of experience in Java or Kotlin and comfortable working with microservices architecture.
• Hands-on frontend experience using React, JavaScript, HTML, and CSS.
• Understanding of REST API principles, JSON data manipulation, and consuming backend endpoints.
• Openness to utilizing AI tools and LLMs in daily development and code generation workflows.
• Proficiency in English at a minimum B2+ level.
• Must reside in and/or have work authorization in Poland.

• Designing and adjusting backend APIs and preparing backend mocks using Java or Kotlin within a microservices architecture.
• Developing responsive web components, checkout funnels, and registration pathways using React, JavaScript, HTML, and CSS.
• Integrating systems and endpoints to facilitate onboarding and collaboration with strategic external partners.
• Switching context dynamically between backend enablement and web frontend development depending on project priorities.
• Leveraging AI coding tools and agentic development workflows to accelerate product delivery and streamline full-stack tasks.

Must reside in and/or have work authorization in Poland.