Senior Kotlin Multiplatform Mobile Engineer (Remote)

Integral Solutions - Data & AI; Województwo mazowieckie; Remote; PLN 344,000 - 369,000; Full time

Job summary

Integral Solutions - Data & AI is seeking a Senior Fullstack Mobile Engineer (KMP/Java) to join as a remote role from Poland. You will contribute across the full stack, from mobile apps built with Kotlin and Kotlin Multiplatform to backend services using Java and Spring Boot.

You will take ownership of features end-to-end, collaborating with cross-functional teams to deliver scalable, secure, and high-quality digital financial products used by millions of customers.

Qualifications

• Experience in mobile apps development with Kotlin or Kotlin Multiplatform.
• Strong knowledge of Android or iOS architectures.
• Production-grade Kotlin applications experience.
• Backend experience with Java, Spring Boot and microservices.
• Experience with CI/CD and production environments.
• Ability to own features end-to-end.

Responsibilities

• Develop shared business logic across mobile platforms using Kotlin Multiplatform (KMP).
• Design and build backend services and APIs using Java, Kotlin, and Spring Boot.
• Build and enhance customer-facing mobile features used by real customers every day.
• Work with cloud services, CI/CD, observability, monitoring, and production systems.
• Improve scalability, reliability, performance, security, and user experience.
• Collaborate closely with product, design, architecture, security, and platform teams.
• Drive engineering excellence through technical leadership, mentoring, and best practices.

Skills

Kotlin

Kotlin Multiplatform

Android architecture

iOS architecture

Java/Spring Boot

CI/CD

APIs / Microservices

Job description

Integral Solutions - Data & AI is seeking a Senior Fullstack Mobile Engineer (KMP/Java) to join as a remote role from Poland. You will contribute across the full stack, from mobile apps built with Kotlin and Kotlin Multiplatform to backend services using Java and Spring Boot.

You will take ownership of features end-to-end, collaborating with cross-functional teams to deliver scalable, secure, and high-quality digital financial products used by millions of customers.