Kotlin Multiplatform Mobile Dev - Remote/Hybrid

Integral Solutions - Data & AI; Warszawa; Hybrid; PLN 316,000 - 365,000; Full time

Job summary

Integral Solutions - Data & AI is seeking a Fullstack Mobile Developer (Kotlin Multiplatform) to build features for fintech mobile apps, focusing on cross-platform logic and native experiences.

You will work remotely and in a hybrid setup with product, design, architecture, security and platform teams. Hands-on, fast-learning and collaborative, you’ll enhance backend services and production systems using Java/Kotlin and Spring Boot.

Qualifications

• Strong experience in mobile app development, with cross-platform knowledge.
• Deep understanding of iOS and Android Architecture Components.
• Strong Kotlin skills and modern mobile architecture experience.
• Backend development with Java and Spring Boot.
• Experience with APIs, microservices and event-driven systems.
• CI/CD, automated testing and production systems experience.
• Ability to own a feature from design to production.
• Good communication across multiple teams.

Responsibilities

• Build and improve mobile features used by real customers.
• Develop shared business logic for mobile platforms using Kotlin Multiplatform.
• Build backend services and APIs with Java/Kotlin and Spring Boot.
• Work with cloud services, CI/CD pipelines, monitoring and production support.
• Improve performance, reliability, security and user experience.
• Use AI coding tools to assist development, testing and documentation.
• Collaborate with product, design, architecture, security and platform teams.
• Help define engineering practices and mentor developers.

Skills

Mobile development

Kotlin

Kotlin Multiplatform

Java

Spring Boot

APIs / Microservices

CI/CD

Ownership

Tools

Kotlin Multiplatform

Spring Boot

Java

CI/CD tools

Job description

Integral Solutions - Data & AI is seeking a Fullstack Mobile Developer (Kotlin Multiplatform) to build features for fintech mobile apps, focusing on cross-platform logic and native experiences.

You will work remotely and in a hybrid setup with product, design, architecture, security and platform teams. Hands-on, fast-learning and collaborative, you’ll enhance backend services and production systems using Java/Kotlin and Spring Boot.