Kotlin Multiplatform Fullstack Mobile Engineer - Fintech

Integral Solutions - Informatica Distributor; Warszawa; Hybrid; PLN 314,025 - 362,337; Full time

Job summary

Integral Solutions - Informatica Distributor is seeking an experienced Fullstack Mobile Developer to join our fintech-focused team working on a large-scale digital payments platform. You will design, build, and own mobile systems and fullstack solutions, collaborating across engineering, product, and backend teams to ensure scalable, secure, and high-performance services.

The role emphasizes hands-on Kotlin Multiplatform, Clean Architecture, and modern microservices with Kafka, REST APIs,

Qualifications

• 5+ years of software development experience.
• Strong Fullstack experience with a significant focus on Mobile.
• Hands-on experience with Kotlin Multiplatform (KMP).
• Deep understanding of client-side architecture and Clean Architecture.
• Experience with Spring Framework and Spring Boot.
• Strong understanding of distributed systems and microservices architecture.
• Experience with Kafka, REST APIs, and event-driven architectures.
• Experience with Docker, Kubernetes, and CI/CD processes.
• Familiarity with AWS – a bonus.

Responsibilities

• Design, build, and maintain complex mobile systems at scale, integrating advanced technologies.
• Develop advanced fintech products with end-to-end ownership and operational responsibility.
• Lead and deliver fullstack solutions from concept to production.
• Collaborate closely with cross-functional teams to continuously improve the product.
• Design and implement scalable and robust software architectures.
• Ensure high code quality, performance, and system reliability.

Skills

5+ years experience

Fullstack Mobile

Kotlin Multiplatform

Clean Architecture

Spring Framework

Spring Boot

Distributed systems

Microservices

Kafka

REST APIs

Event-driven architectures

Docker

Kubernetes

CI/CD

AWS

Tools

Docker

Kubernetes

CI/CD

AWS

Job description

Integral Solutions - Informatica Distributor is seeking an experienced Fullstack Mobile Developer to join our fintech-focused team working on a large-scale digital payments platform. You will design, build, and own mobile systems and fullstack solutions, collaborating across engineering, product, and backend teams to ensure scalable, secure, and high-performance services.

The role emphasizes hands-on Kotlin Multiplatform, Clean Architecture, and modern microservices with Kafka, REST APIs,