Senior Full-Stack Mobile Dev — AI‑Driven, Flexible/Remote

N-iX; Poland; Hybrid; PLN 180,000 - 300,000; Full time

Benefits offered by this job

Flexible work formats

Competitive salary and package

Mentorship program and tech trainings

Active tech communities and knowledge‑

Job summary

N-iX is seeking a Senior Full Stack Mobile Developer to join our Clint`s team. You’ll build modern mobile products end‑to‑end, from the mobile app to backend services, APIs, and cloud solutions, writing clean code and embracing AI tools to accelerate development.

You’ll work across mobile apps, shared logic, backend services and production systems, mentoring peers and helping define engineering practices. A strong emphasis on performance, security and maintainability is expected.

Qualifications

• Strong experience in mobile application development.
• Deep understanding of iOS & Android Architecture Components.
• Strong Kotlin skills and modern mobile architecture.
• Backend development experience with Java 7+ and Spring Boot.

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

Kotlin Multiplatform

Java

Spring Boot

REST API

Microservices

Kafka

AWS

CI/CD

AI tools

Code quality

Tools

Flutter

React Native

GitHub Copilot

Cursor

Claude Code

Gemini Code Assist

Job description

N-iX is seeking a Senior Full Stack Mobile Developer to join our Clint`s team. You’ll build modern mobile products end‑to‑end, from the mobile app to backend services, APIs, and cloud solutions, writing clean code and embracing AI tools to accelerate development.

You’ll work across mobile apps, shared logic, backend services and production systems, mentoring peers and helping define engineering practices. A strong emphasis on performance, security and maintainability is expected.