Fullstack Mobile Developer ( Kotlin)

Job Description

Job title: Fullstack Mobile Developer (Kotlin Multiplatform)Location: Poland / Remote/ WarsawWork mode: Remote/ HybridType of cooperation: B2B contract Salary range: B2B 6500 - 7500 Euro/month- nettoAbout the company/project:We are looking for a talented and passionate Fullstack Mobile Developer to join our team and contribute to the development of innovative, customer-facing digital products in a fast-paced and technology-driven environment.As part of the team, you will work on a large-scale fintech platform supporting real-time digital payments, money transfers, account balance management, merchant payments, and financial service integrations.The solution serves a large user base and processes high volumes of transactions through a combination of mobile applications, distributed backend services, APIs, and secure transaction processing systems.This is an opportunity to work on a business-critical product where scalability, reliability, security, and user experience are at the core of every engineering decision. The platform operates in a highly demanding environment, requiring modern software architecture, seamless integration between mobile and backend systems, and the ability to deliver performant solutions at scale.Working on such a product offers exposure to complex technical challenges, high-traffic systems, and the unique demands of building secure financial services used by millions of end users.Responsibilities:Design, build, and maintain complex mobile systems at scale, integrating advanced technologiesDevelop advanced fintech products with end-to-end ownership and operational responsibilityLead and deliver fullstack solutions from concept to productionCollaborate closely with cross-functional teams to continuously improve the productDesign and implement scalable and robust software architecturesEnsure high code quality, performance, and system reliabilityYou are an ideal candidate if you have:5+ years of software development experienceStrong Fullstack experience with a significant focus on MobileHands-on experience with Kotlin Multiplatform (KMP)Deep understanding of client-side architecture and Clean ArchitectureExperience with Spring Framework and Spring BootStrong understanding of distributed systems and microservices architectureExperience working with Kafka, REST APIs, and event-driven architecturesExperience with Docker, Kubernetes, and CI/CD processesFamiliarity with AWS – an advantageNice to have:Strong communication and teamwork skillsAbility to thrive in a fast-paced, dynamic environmentProactive, “Can-Do” attitudeStrong problem-solving and system-thinking abilitiesWhat we offer: