Senior Tech Lead / Full Stack Engineer (Node.js, AWS, Vue - Backend focused)

Senior Tech Lead / Full Stack Engineer (Node.js, AWS, Vue - Backend focused)

 Location: Poland - Hybrid (Kraków or Wroclaw) 

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.

The Project

You will be part of an international team working on a service that is a key component of a large-scale enterprise application used by one of the world leaders in the dairy production services industry. The service you will work on focuses on bi-directional data exchange between our product and government agencies, which our customers are legally obliged to report to. The main purpose of the application is to:

• Enable customers to synchronize data both manually and automatically.

• Provide visibility into pending work items and required actions.

• Offer insight into historical data and reporting entries.

• Detect data inconsistencies and guide users through resolving validation issues.

• The data handled by the system originates from multiple sources including automated machine data and manual user input which makes validation, error handling, and reconciliation a core part of the domain.

About the Role

As a Senior Tech Lead, your primary responsibility will be to lead a team of 4 developers and 1 tester, while also contributing hands-on to the product with a strong emphasis on backend engineering.

You will have initial exposure to the frontend to become familiar with the UI and workflows. However, once current improvements are completed, the majority of ongoing development and technical challenges will be focused on backend components, including distributed processes, complex integrations, and large-scale data synchronization.

Depending on project timelines, you will be involved in:

• Implementing data synchronization processes for new regions.

• Further development and improvement of backend APIs and business processes.

• Maintenance and evolution of integration and end-to-end tests (frontend & backend).

• Maintenance and improvement of GitLab CI pipelines for both FE and BE.

• Development and maintenance of Grafana dashboards and alerts.

• Providing technical leadership, architectural guidance, and code reviews for the team.

What You’ll Be Doing

Your early focus will be on stabilizing and refining selected frontend areas, quickly transitioning to full ownership of backend systems, integrations, and cloud architecture.

Must Have Skills

The successful candidate will demonstrate deep, production-level expertise in the following areas:

• Core Languages & Frameworks: Expert proficiency in Node.js 20 & TypeScript. Solid experience with Vue 2 and/or Vue 3 in a production environment (frontend work is limited but familiarity is important).

• Testing Mastery: Demonstrated success implementing and leveraging Cypress & Jest for robust E2E and unit testing.

• Cloud Architecture: Extensive, hands-on experience architecting and deploying scalable solutions on AWS (e.g., CDK, Lambda, DynamoDB, RDS/PostgreSQL, SQS, EventBridge, EC2, AppSync).

• DevOps: Proven ability to define and optimize GitLab CI pipelines.

• Systems Integration: Expert knowledge of building and securing HTTP / WebSocket-based solutions.

Nice to Have

AWS Certifications

Grafana

C#

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 at and start an exciting journey of growth and innovation with us!