Senior Mobile Full-Stack Engineer (KMP) — Remote

N-iX; Poland; Hybrid; PLN 200,000 - 320,000; Full time

Benefits offered by this job

Flexible work options

Competitive salary

Career growth

Education reimbursement

Tech talks and trainings

Job summary

N-iX is seeking a Senior Full Stack Mobile Developer to join our team. You will build end-to-end mobile products, including the app experience, shared logic, backend services, APIs, cloud services and production systems.

You will collaborate with product, design and security teams to deliver robust, scalable features and guide engineering best practices. Ideal candidates bring strong mobile development experience, proficiency in Kotlin and Java, and a willingness to leverage AI-assisted tooling

Qualifications

• Strong experience in mobile application development.
• Deep understanding of iOS & Android Architecture Components.
• Experience with Kotlin and modern mobile architecture.
• Backend development experience with Java/Kotlin and Spring Boot.
• Experience with CI/CD, automated testing and production systems.

Responsibilities

• Build and improve mobile features used by real customers.
• Develop shared business logic for mobile platforms, mainly using Kotlin Multiplatform (KMP).
• Build backend services and APIs using 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 help with development, testing, documentation and troubleshooting.
• Work closely with product, design, architecture, security and platform teams.
• Help define good engineering practices and mentor other developers.

Skills

Mobile development

Kotlin

Android architecture

iOS architecture components

Kotlin Multiplatform

Java/Kotlin

CI/CD

Backend integration

Tools

Kotlin Multiplatform

Spring Boot

REST APIs

AWS

Job description

N-iX is seeking a Senior Full Stack Mobile Developer to join our team. You will build end-to-end mobile products, including the app experience, shared logic, backend services, APIs, cloud services and production systems.

You will collaborate with product, design and security teams to deliver robust, scalable features and guide engineering best practices. Ideal candidates bring strong mobile development experience, proficiency in Kotlin and Java, and a willingness to leverage AI-assisted tooling