Android Developer (Kotlin Multiplatform)

Quick Facts

• Role: Android Developer (Kotlin Multiplatform)

• Work model: Hybrid (1 day per week in Warsaw)

• Pay: 1200–1400 PLN net/day (depending on experience)

Description

You will design and develop modern mobile applications for Android and iOS using Kotlin Multiplatform (KMP). The role focuses on creating shared business logic and modern mobile architecture, particularly for banking mobile use cases such as digital payments. You will also integrate mobile apps with backend and external payment services while ensuring high security for user data and transactions.

Responsibilities

• Design and develop modern mobile apps for Android and iOS with Kotlin Multiplatform

• Build and evolve shared business logic used across mobile platforms

• Define and develop mobile solution architecture aligned with business needs and technical standards

• Implement features for mobile payments and other digital services in a banking environment

• Integrate mobile apps with backend systems, banking services, and external payment providers

• Ensure strong mobile app security: data protection and safe transaction execution

• Make key architectural decisions for development, maintenance, and optimization

• Collaborate with analytics, product, UX/UI, and backend teams to deliver consistent solutions

• Support developer teams with programming, architectural, and technology best practices

• Analyze and optimize mobile solution performance, quality, and maintainability

• Participate in product roadmap planning and implement innovative technology solutions for mobile banking

Requirements

• Higher education (preferably in Computer Science or related field)

• Multi-year experience designing, developing, and maintaining mobile applications for Android and iOS

• Very good Kotlin and Android ecosystem knowledge, plus practical Swift experience

• Expert knowledge of Kotlin Multiplatform (KMP)

• Experience designing modern mobile architectures for high business and technical requirements

• Experience in banking/financial sector projects, especially digital payments

• Practical experience integrating mobile apps with backend systems and external payment services

• Knowledge of mobile app security, data protection, and secure transaction processing

Benefits

• Long-term collaboration

• Technical training, certifications, and skill development

• Mentoring Competence Center community

• Clear career path

• Employee benefits: Multisport, private medical care, life insurance

• Friendly work atmosphere, integration events, and team-building meetings