Backend Developer with Kotlin

We are seeking a Backend Developer with Kotlin to join our team.

About the project:
You’ll join a small Kotlin codebase originally built by one developer and expand it with new features, including a bank-account integration to automatically confirm payments. In parallel, you’ll help deliver a new mobile app in Kotlin and collaborate with a React web frontend.

About the client:
Go Getter is an all-in-one administration platform for entrepreneurs and accountants, covering invoicing, expense capture, projects, and agenda. It integrates with accountants, popular apps, and banks to streamline document flow and payments.

Key responsibilities:

• Implement new backend features in Kotlin, including integrations with external banking APIs for payment status;

• Build and maintain a mobile application in Kotlin;

• Collaborate with a React frontend and ensure smooth API contracts;

• Work closely with a compact team: 2 developers, a PM (Tom), and a client-side PO in an agile setup;

• Write clean, maintainable code aligned with clean architecture, SOLID, TDD, and DDD;

• Participate in code reviews, propose improvements, and uphold performance and security best practices.

Qualifications:

• 4 years of professional Kotlin development experience (backend; mobile Kotlin experience a plus);

• Practical experience with relational databases;

• Strong grasp of clean architecture, clean coding, and SOLID;

• Hands-on with test-driven development (TDD) and domain-driven design (DDD);

• Familiarity with React or frontend collaboration patterns (nice to have);

• Clear communication, ownership mindset, and comfort working in a small, fast-moving team.

In exchange for your skills, we offer:

• 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;

• Perks incl. 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;

• Tea, coffee, and all-you-can-eat fruits and nuts in the office.

The recruitment process includes:

• HR screening 30min Zoom call;

• 1h technical interview;

• General call with the team leader;

• Making an offer meeting.