Remote Senior KMP & Java Fullstack Engineer

Integral Solutions - Informatica Distributor; United States; Remote; USD 87,000 - 93,000; Full time

Job summary

Integral Solutions - Informatica Distributor is seeking a Senior Fullstack Mobile Engineer to own development across mobile platforms and backend services. The role emphasizes Kotlin Multiplatform, Kotlin, Java, and Spring Boot within a modern fintech-like digital platform serving millions of users.

The position is remote from Poland, with a B2B contract and monthly net salary in euros. You will influence architecture, collaborate across teams, and help scale production systems and

Qualifications

• Strong commercial experience in mobile app development with Kotlin or Kotlin Multiplatform.
• Deep understanding of modern Android or iOS architectures and software design principles.
• Strong Kotlin skills and production-grade applications.
• Some backend development experience with Java, Spring Boot, APIs, and microservices.

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 Multiplatform

Mobile development

Android architectures

iOS architectures

Java

Spring Boot

APIs & microservices

CI/CD

End-to-end ownership

Team collaboration

Job description

Integral Solutions - Informatica Distributor is seeking a Senior Fullstack Mobile Engineer to own development across mobile platforms and backend services. The role emphasizes Kotlin Multiplatform, Kotlin, Java, and Spring Boot within a modern fintech-like digital platform serving millions of users.

The position is remote from Poland, with a B2B contract and monthly net salary in euros. You will influence architecture, collaborate across teams, and help scale production systems and