New offer - be the first one to apply!

November 3, 2026

Senior Full-Stack Mobile Engineer (Kotlin Multiplatform/Java)

Senior • Remote

7,000 - 7,500 EUR/yr

Warsaw, Poland

Quick Facts

  • Role: Senior Full-Stack Mobile Engineer (Kotlin Multiplatform/Java)

Description

Join a team building large-scale digital financial products used by millions and processing real-time financial transactions at high volume. As a Senior KMP Engineer, you will contribute end-to-end across shared Kotlin Multiplatform logic, mobile applications, backend services/APIs, and cloud/production systems. The core stack includes Kotlin, Kotlin Multiplatform (KMP), Java, and Spring Boot.

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 with product, design, architecture, security, and platform teams
  • Drive engineering excellence through technical leadership, mentoring, and best practices

Requirements

  • Strong commercial experience in mobile application development with Kotlin or Kotlin Multiplatform
  • Deep understanding of modern Android or iOS architectures and software design principles
  • Strong Kotlin skills and experience building production-grade applications
  • Some backend development experience with Java, Spring Boot, APIs, and microservices
  • Familiarity with distributed systems, event-driven architectures, and modern engineering practices
  • Experience with CI/CD, automated testing, and production environments
  • Ability to take end-to-end ownership of features from design through production
  • Strong communication and collaboration skills

Benefits

  • Cafeteria benefits package (including private healthcare or a Multisport card)
  • Access to learning and language training platforms
  • Company events and birthday celebrations
  • MacBook as your primary work device

Similar jobs you might like

Unlock Full Resume Report