Principal Software Engineer developing scalable backend systems for Walmart's Digital Out of Home platform. Leading architecture, mentoring engineers, and guiding technical direction across thousands of retail locations.
About the role
- Senior Full Stack Engineer developing next-generation tools at Sitemark for global renewable energy transition. Leading feature development and collaborating with product managers and engineering teams.
Responsibilities
- Lead the end-to-end development of new platform features, from planning and prioritization to implementation, testing, and deployment
- Collaborate closely with product managers and engineering peers to shape both technical solutions and product direction
- Contribute to architectural decisions, ensuring high performance, maintainability, and scalability
- Write clean, efficient, and well-tested code following best practices
- Participate in product brainstorming, refinement, and continuous improvement sessions
- Proactively share knowledge and mentor peers within a small, agile team
Requirements
- Strong fluency in JavaScript/TypeScript, React, and Node.js
- Solid understanding of or strong interest in cloud infrastructure (PostgreSQL, Azure, AWS, Docker)
- Proven experience developing scalable, production-grade applications
- Passion for writing clean, maintainable, reusable code with a focus on testing and best practices
- Ability to quickly learn and adapt to new technologies
- Collaborative mindset and self-driven approach to problem-solving
- Experience with Python or Machine Learning is a plus
Benefits
- Supportive relationships, built on transparency and a flat structure, in a diverse and multinational team
- Office in the center of historical Kraków, where your dog is always welcome
- Flexibility when it comes to working from the office or home
- Perks include Multikafeteria, Group Life Generali insurance, Signal Iduna, Multisport, language lessons 1:1
- Sport and other events, including weekly running, squash, and team lunches on the house
- Free tea, coffee, and all-you-can-eat fruits and nuts in the office
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