Android Developer with Kotlin Multiplatform (f/m/x)

Sii Poland; Łódź; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Profit sharing

Medical care

Centre of internal trainings

Open and accessible management

Job summary

Sii Poland is seeking an experienced Android Developer to join a team building an omnichannel banking platform used by hundreds of thousands of users. You will share business logic via Kotlin Multiplatform and craft UI with Jetpack Compose, while integrating with banking systems and payment flows like Google Pay.

The role emphasizes high quality, security, and scalable architecture, with CI/CD processes and cross-team collaboration as core responsibilities.

Qualifications

• 5+ years of experience as an Android Developer
• At least 3 years of practical Kotlin Multiplatform experience
• Strong knowledge of Clean Architecture and SOLID principles
• Minimum 2 years of asynchronous programming with Coroutines or RxJava, DI with Koin
• Experience with Jetpack Compose and Compose Multiplatform
• Ability to write BDD tests
• Fluent Polish language skills required
• Must be located in Poland

Responsibilities

• Development and maintenance of a mobile application in the banking ecosystem
• Design and implementation of shared business logic in Kotlin Multiplatform for Android
• Creating user interfaces based on Jetpack Compose and Compose Multiplatform
• Integrating the application with banking systems, external services, and payment mechanisms (e.g., Google Pay)
• Ensuring code quality through automated tests, code reviews, and participation in architectural decisions
• Providing technical support to the team - troubleshooting, code review, and knowledge sharing
• Collaboration with product, backend, iOS teams, and other IT units to deliver cohesive solutions
• Participation in maintaining and developing CI/CD processes and application build and test pipelines

Skills

Kotlin Multiplatform

Clean Architecture

SOLID principles

Asynchronous programming with Corount?

Tools

Jetpack Compose

Compose Multiplatform

RxJava

Koin

Job description

We are looking for an Android Developer to join the team developing an omnichannel platform for one of the largest banks in Poland, responsible for developing and maintaining modern mobile applications used by hundreds of thousands of users. The project is carried out in an environment with high requirements for quality, security, and scalability, using Kotlin Multiplatform as a key technology to share business logic across platforms.

Your tasks

• Development and maintenance of a mobile application in the banking ecosystem
• Design and implementation of shared business logic in Kotlin Multiplatform for Android
• Creating user interfaces based on Jetpack Compose and Compose Multiplatform
• Integrating the application with banking systems, external services, and payment mechanisms (e.g., Google Pay)
• Ensuring code quality through automated tests, code reviews, and participation in architectural decisions
• Providing technical support to the team - troubleshooting, code review, and knowledge sharing
• Collaboration with product, backend, iOS teams, and other IT units to deliver cohesive solutions
• Participation in maintaining and developing CI/CD processes and application build and test pipelines

Requirements

• Minimum 5 years of experience as an Android Developer
• At least 3 years of practical experience with Kotlin Multiplatform
• Strong knowledge of Clean Architecture and SOLID principles
• Minimum 2 years of experience in asynchronous programming using Coroutines or RxJavali>Experience with Dependency Injection using Koin
• Experience working with Jetpack Compose and Compose Multiplatform
• Ability to write BDD tests
• Fluent Polish language skills required
• Must be located in Poland

Job no. JOB-F7M69

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care