SENIOR ANDROID DEVELOPER (KOTLIN, JETPACK COMPOSE)

Reply, Inc.; Katowice; Hybrid; PLN 145,000 - 246,000; Full time

Benefits offered by this job

Medical Care

Benefits Platform

Language Courses

Company Events

Meal tickets

Gym/Fitness cards

Job summary

Reply, Inc. is looking for an experienced Android developer to build and evolve the heyOBI app, connecting digital shopping with in-store experiences within a large retail ecosystem.

You will contribute to intuitive and reliable mobile experiences for international markets, collaborating with engineers, UX/UI designers, product owners, and architects. Your key responsibilities include developing features with Kotlin and Jetpack Compose, integrating GraphQL/REST APIs, ensuring robust

Qualifications

• Completed university degree in Computer Science or a comparable technical field.
• 5+ years of professional Android development experience, with strong proficiency in Kotlin.
• Hands-on experience with Jetpack Compose and Android SDK lifecycle.
• Experience integrating GraphQL and REST APIs, ideally using Ktor.
• Experience with local persistence and caching (Room and DataStore).
• Strong English and Polish communication skills and willingness to work in a hybrid model in Katowice.

Responsibilities

• Develop and maintain Android features using Kotlin and Jetpack Compose, integrating with existing Android Views where needed.
• Translate business requirements and UX/UI designs into accessible, responsive mobile experiences.
• Integrate GraphQL and REST APIs for product information, store availability, and loyalty services.
• Implement reliable authentication, session management, and network error handling.
• Manage asynchronous operations and application state using Kotlin Coroutines and Flow.
• Develop and maintain local persistence, caching, and data synchronisation.
• Support seamless navigation across native screens, embedded web content, deep links, and push notifications.
• Ensure application quality through automated testing, code reviews, performance optimisation, and production issue analysis.
• Collaborate on localisation, market-specific requirements, CI/CD, and Google Play releases.

Skills

Android development

Kotlin

Jetpack Compose

GraphQL integration

REST APIs

Authentication & error handling

Internationalization

CI/CD collaboration

Education

Bachelor's degree in Computer Science or equivalent

Tools

Ktor

Room

DataStore

Git

Gradle

CI/CD

Job description

We are looking for an Android developer who wants to develop and evolve the heyOBI app, connecting digital shopping with the in-store experience within a large retail ecosystem. You will contribute to intuitive and reliable mobile experiences covering product discovery, shopping, customer accounts, and loyalty benefits. You will collaborate closely with engineers, UX/UI designers, product owners, and architects to deliver maintainable solutions for international markets.

Your key responsibilities include:

• Develop and maintain Android features using Kotlin and Jetpack Compose, integrating with existing Android Views where needed.
• Translate business requirements and UX/UI designs into accessible, responsive, and user-friendly mobile experiences.
• Integrate GraphQL and REST APIs for product information, store availability, customer accounts, shopping lists, and loyalty services.
• Implement reliable authentication, session management, and network error handling.
• Manage asynchronous operations and application state using Kotlin Coroutines and Flow.
• Develop and maintain local persistence, caching, and data synchronisation to ensure consistent behaviour under varying network conditions.
• Support seamless navigation across native screens, embedded web content, deep links, and push notifications.
• Ensure application quality through automated testing, code reviews, performance optimisation, and production issue analysis.
• Collaborate on localisation, market-specific requirements, CI/CD, and Google Play releases.
• Medical Care
• Benefits Platform
• Language Courses Platform
• Company Events
• Salary range for Employment Contract: 13 000 - 22 000 PLN gross/month.
• Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choosemedical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms),cinema tickets, shop vouchers, discounts and many more.
• Language Courses –you'll have access to a multi-language learning platform enabling you to practice your language skills and learn new ones!
• Regular and systematic furthertraining opportunities - both internallyand from external providers. We support your ongoing learning and development.
• Cooperation within an internal community is our everyday reality. We havenetworking events, coding challenges, and company parties for different occasions.

Qualifications

• Completed university degree in Computer Science or a comparable technical field, or equivalent practical experience.
• 5+ years of professional Android development experience, with strong proficiency in Kotlin and experience maintaining and evolving a production application.
• Hands-on experience with Jetpack Compose, a solid understanding of the Android SDK and application lifecycle, and familiarity with existing Android Views and Fragments.
• Practical experience with Kotlin Coroutines and Flow, including asynchronous operations and reliable UI state management.
• Experience integrating GraphQL and REST APIs, ideally using Ktor, with a good understanding of authentication, session management, and network error handling.
• Experience with local persistence and caching, ideally using Room and DataStore, and maintaining consistency between local and backend data.
• A good understanding of modular application design, separation of concerns, and dependency injection.
• Familiarity with WebView integration, deep links, push notifications, and Android background processing.
• Experience with automated unit and UI testing, debugging, crash analysis, and performance optimisation.
• Familiarity with Git, Gradle, CI/CD, and Google Play release processes.
• Strong communication skills in English and Polish, with readiness to work in a hybrid model in Katowice.

Nice to have:

• Experience in retail, e-commerce, or loyalty applications.
• Familiarity with Kotlin Multiplatform or Compose Multiplatform.
• Experience with Firebase, ML Kit, or CameraX.
• Knowledge of accessibility and localization for international apps.

About OBI Smart Technologies

WHO ARE WE:
We are a joint venture between OBI and Reply Group, responsible for co-designing, building and operating mission-critical digital platforms for commerce, customer service, and omnichannel retail.

OUR MISSION:
"We unite technology leadership with deep retail vision to implement standardized processes and scalable digital products that drive efficient support for one of Europe's largest DIY retailers. Leveraging proven best practices, we advance the internationalization of products and the digital mindset of our partners, delivering consistent and business-critical solutions to support the targets of our customer."