Senior Backend Engineer (TypeScript / AWS Serverless)

🚀 Senior Backend Engineer (TypeScript / AWS Serverless)

Location: Poland - Hybrid (Kraków)

Contract: B2B, Full-Time

Join the Future of Digital Tech with Kolomolo

At Kolomolo, we don’t just follow trends - we set them. As a global supplier of IT services and digital modernization solutions, we help businesses embrace cutting-edge technology to optimize their operations. Now, we are growing and looking for fresh talent to grow with us.

Are you proactive, tech-savvy, and eager to build your career in IT? This role could be your perfect fit.

About the Role

Kolomolo is looking for a Senior Backend Engineer to join our international Service Enablement team within the Digital Services department. This role is ideal for an experienced engineer passionate about building scalable microservices, working with modern serverless architectures, and taking ownership of both development and quality assurance.

You will play a key role in designing, developing, and maintaining backend services, while contributing to the modernization of existing systems in a cloud-native environment.

What You’ll Be Doing

• Design, develop, and maintain backend microservices using TypeScript.
• Build and deploy scalable applications using AWS Serverless architecture (e.g., Lambda, API Gateway, DynamoDB).
• Take full ownership of the development lifecycle: feature delivery, bug fixing, refactoring, and production deployments.
• Develop and maintain automated tests to ensure high-quality, reliable code.
• Contribute to system modernization and migration initiatives based on architectural guidelines.
• Collaborate closely with cross-functional teams to deliver high-impact solutions.
• Participate actively in Agile/Scrum ceremonies and continuous improvement processes.
• Ensure best practices in code quality, performance, and security.

Team & Environment

• Agile Scrum team (Tech Lead, Fullstack Developers, Scrum Master, Product Owner)
• International and distributed team (Poland & Sweden)
• Strong engineering culture with a senior-level team and stable delivery velocity
• Developer-owned quality assurance model (testing is part of engineering responsibilities)

Tech Stack

• Languages: TypeScript (Node.js)
• Cloud: AWS (Serverless architecture)
• Architecture: Microservices
• Testing: Automated testing frameworks (unit/integration)
• Integrations: External enterprise systems, payment platforms, and data services

What We Are Looking For

• 5+ years of experience in backend development
• Strong proficiency in TypeScript / Node.js
• Hands-on experience with AWS Serverless services
• Solid understanding of microservices architecture
• Experience with test automation and quality-driven development
• Ability to work independently and take ownership of solutions
• Experience working in Agile/Scrum environments
• Strong communication skills in an international setting

What is in It for You

• Competitive salary and benefits.
• Career development opportunities in a growing tech company.
• Continuous learning culture: mentorship, internal training, and certifications.
• Flexible, agile work environment (remote, hybrid, or on-site in Kraków).
• Office perks: great coffee, tea, fresh fruit, snacks, and a fun atmosphere.
• Flat management structure, where your voice matters.
• Regular team events and a social, supportive work culture.
• B2B contract or Contract of Mandate (Umowa Zlecenie).

🌟 Why Join Kolomolo?

At Kolomolo, we prioritize innovation, agility, and autonomy. Our teams have the freedom to own their work, share ideas, and make meaningful contributions. Inspired by Scandinavian values, we believe in work-life harmony and creating an inclusive culture where everyone thrives.

You will be part of a passionate, skilled, and friendly team that works hard and celebrates together. Here, you can build your career on your own terms, with opportunities to grow, learn, and make a real impact.

Our Flat Structure & The Culture of Inclusion

At Kolomolo, we break the corporate mold. We offer:

• Agile Teams & Autonomy: No micromanagement. You’ll own your projects and enjoy the freedom to innovate.
• Work-Life Harmony: Inspired by Scandinavian values, we prioritize balance and flexibility, where remote work and asynchronous collaboration are in our DNA.
• Learning & Growth: Continuous learning is at our core. We reward hard work, value smart ideas, and foster an environment of mutual respect and trust.
• Inclusive Culture: We believe in DEI: diversity, equity and inclusion. We are committed to creating an environment where every individual, regardless of background, identity, or experience feels valued, respected, and empowered to thrive.

Join Kolomolo and elevate your career with cutting-edge technology, a supportive team, and a company that truly values your input.

Ready for the next step? Apply now and start an exciting journey of growth and innovation with us!