Junior Full Stack Web Developer (Kraków-based)

Are you ready to grow your development skills in a supportive environment where you'll work on real client projects and learn from experienced developers? Treeline Interactive is looking for an enthusiastic Junior Full Stack Web Developer who wants to build their career with guidance and mentorship.

About the Role:

• Based in Kraków, with a central city office close to the Main Market Square and Kazimierz district. The candidate should be local, as our hardware lab is in the office.
• B2B contract (USD hourly rate), flexible working hours, and remote work options available.
• Work in a collaborative, respectful environment where learning and asking questions is encouraged
• Join a team with members in both Kraków and San Diego, gaining exposure to international collaboration
• Receive mentorship and guidance as you develop your technical and professional skills

What You'll Do:

• Contribute to features and solutions across client projects, with support from senior team members
• Participate in client meetings, learning how to communicate technical concepts 
• Build and maintain web applications using modern technologies and best practices
• Learn about system integrations and work with different parts of the tech stack
• Grow your skills through code reviews, pair programming, and continuous feedback

Who Thrives Here:

• You're eager to learn and aren't afraid to ask questions when you need help
• You're motivated to take on new challenges and responsibilities as you grow
• You're comfortable communicating in English (both written and spoken)
• You enjoy working with others and learning from more experienced developers
• You're curious about how different systems work together

Technical Skills:

Required:

• Good understanding of JavaScript/TypeScript
• Frontend: React
• Backend: NestJS
• Understanding of databases (SQL or NoSQL)
• Git version control basics

Nice to Have:

• Experience with Next.js, or React Native
• Exposure to cloud platforms (AWS, Azure)
• Knowledge of serverless architecture
• Any experience with APIs or system integrations

What We're Looking For:

• Recent graduates or developers with 0-2 years of professional experience
• A portfolio or GitHub with personal/academic projects demonstrating your skills
• Willingness to learn our tech stack (React, Next.js, NestJS, TypeScript)
• Good problem-solving skills and attention to detail
• Ability to work some hours aligned with Pacific Standard Time when needed

What You Get:

• Mentorship from experienced developers who want to see you succeed
• Exposure to real client work and professional development practices
• Respectful, supportive culture where everyone's voice matters
• Flexible hours, remote work options, and a Kraków office space
• Opportunities to gradually take on more responsibility as you grow
• Learning-focused environment with room for career advancement

We understand you're early in your career – we're looking for potential, enthusiasm, and willingness to learn, not perfection!