Senior Android Developer

Quick Facts

• Role: Senior Android Developer

• Work model: Elastic hybrid; occasional office visits (1x/week)

• Locations: Krakow or Warsaw

• Compensation: 1000–1200 per month + VAT (B2B)

Description

You will support a large-scale e-commerce mobile application, focusing on the technological layer of ad delivery within the app. Working with product owners, designers, and engineers, you’ll turn user needs into robust, high-performance mobile experiences in a fast-paced environment.

Responsibilities

• Design, develop, test, and deploy features with a focus on quality, performance, and responsiveness

• Collaborate with product, design, and engineering teams to implement innovative solutions

• Participate in code reviews and technical discussions to maintain high code quality

• Identify and resolve performance and scalability issues

• Continuously improve development processes, tools, and infrastructure

Requirements

• 5+ years of commercial experience in native Android development (Kotlin)

• Strong understanding of mobile application architecture patterns (MVVM, MVI, Clean Architecture)

• Experience with REST APIs and asynchronous programming

• Ability to write unit and integration tests

• Familiarity with Git

• Solid software engineering fundamentals (data structures and algorithms)

• Experience with CI/CD pipelines

• Good English communication (written and spoken)

Benefits

• High autonomy in organizing your team’s work and the opportunity to try new approaches

• Consumer-focused mobile work with direct impact on user interactions and business results

• Collaboration with experienced specialists and experts

• Opportunity to work at massive scale where even small performance gains matter