Mobile Developer

Job title: Mobile Developer Location: Lisboa/ Portugal Work mode: Remote Type of cooperation: B2B contract

About the company/project: We are looking for a talented and passionate Fullstack Mobile Developer to join our team and work on cutting-edge products in a dynamic and innovative environment.

This is a large-scale fintech product operating as a mobile wallet platform, used daily by millions of users for real-time payments. It enables instant peer-to-peer transfers, online payments, and seamless integrations with merchants, acting as a core payment layer within a highly digitalized market (similar in concept to solutions like PayPal or Venmo).

From a technical perspective, it’s a high-traffic, real-world system focused on performance, scalability, and availability - combining modern backend architectures, APIs, and mobile-first design.

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

You are an ideal candidate if you have

• 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 working with Kafka, REST APIs, and event-driven architectures
• Experience with Docker, Kubernetes, and CI/CD processes

Nice to have

• Familiarity with AWS – an advantage
• Strong communication and teamwork skills
• Ability to thrive in a fast-paced, dynamic environment
• Proactive, “Can-Do” attitude
• Strong problem-solving and system-thinking abilities