Android Kotlin Developer – banking sector project

Senior • Hybrid

Warsaw, Poland

Join a team working on a comprehensive rebuild of a mobile application for one of the leading banks in Poland. You will actively contribute to the development of modern solutions used by hundreds of thousands of customers.

In this role, you will influence the application’s architecture, code quality, and feature development direction. Collaboration with product teams and IT departments will take place in a dynamic, agile environment.

Your tasks

Participate in a large-scale mobile application rebuild project within the banking sector
Develop and implement new features for the Android platform using Kotlin
Provide technical support to the team, including troubleshooting, code review, and mentoring
Ensure high code quality and contribute to architectural decisions
Collaborate closely with project teams, product owners, and other IT units

Requirements

Minimum 5 years of experience in programming for the Android platform
Very good knowledge of Android SDK, Kotlin, and Java SDK, as well as experience with Jetpack Compose
Understanding of system integration concepts: REST, JSON, SOAP web services, XML, XSD
Experience with code review (e.g., GIT, Gerrit) and refactoring is a plus; familiarity with Clean Code principles
Good command of English (minimum communicative level, spoken and written)
Willingness to work in a hybrid model with 1–2 days per week from the office in Warsaw
Fluent Polish required
Residing in Poland required

Sii

Sii is a company recognized as a "Great Place to Work" since 2015, thanks to employee feedback and the implementation of new ideas. Established in 2006, Sii has demonstrated financial stability with a revenue of 2.1 billion PLN and no debts. The company shares its profits with employees, having allocated over 76 million PLN for this purpose since 2022. Sii offers a rich benefits package, including private healthcare, a cafeteria platform, and discounts on cars. Employees can work in comfortable A-class offices or remotely. Sii is involved in numerous fascinating projects for prestigious global brands and invests 1 million PLN annually to support employee passions and volunteer actions. The company emphasizes personal development through meetups, webinars, a training platform, and a technology blog. Sii is characterized by a fantastic atmosphere created by its "Sii Power People."