Senior Android Developer (FinTech/Blockchain Project)

Imagine building a mobile-first platform that could replace payment cards, loyalty cards, and even business cards with one sleek digital identity that works anywhere. This is your chance to join a cutting-edge FinTech/blockchain project as a Senior Android Developer, working fully remotely with a talented, globally distributed team.

At Sigma Software, we are passionate about creating solutions that shape the future. In this role, you’ll work on a product with global reach that combines blockchain, NFC, and QR technologies to deliver secure identity verification and instant transactions.

Why join us? You’ll be part of an innovative environment where your expertise will directly contribute to a product poised for mass adoption, offering career growth, exposure to advanced technologies, and the opportunity to make a real impact.

Customer

Our client is a leading FinTech/blockchain company specializing in digital identity solutions that integrate payments, loyalty programs, and enterprise networking. Their mission is to replace physical cards with a secure, interoperable digital identity usable across multiple sectors. At the intersection of FinTech, retail, and enterprise networking, they are driving innovation with blockchain, NFC, and QR technologies to deliver seamless and secure user experiences.

Project

You’ll work on a mobile-first platform powered by blockchain, NFC, and QR technology, integrating retail loyalty programs and enterprise networking tools. This solution enables users to instantly share verified contacts, payments, and rewards. This is a unique opportunity to contribute to a product that blends hardware and software integration, has global scalability, and offers diverse use cases across industries.

Key technologies: Android Native, Kotlin Multiplatform (KMP), Jetpack Compose, NFC, QR code integration, and blockchain infrastructure.

Responsibilities:

• Design, develop, and maintain high-quality native Android applications

• Implement SOLID principles and Clean Architecture patterns

• Build modular, reusable components and design systems

• Collaborate with cross-functional teams including iOS, Back-end, and product

• Work on blockchain-integrated features, NFC, and QR-based interactions

Requirements:

• 5+ years of experience in native Android development

• Strong knowledge of SOLID principles and Clean Architecture

• Proficiency in Jetpack Compose

• Experience with modularization and reusable components

• Experience with Android Native or Kotlin Multiplatform (not React Native or Flutter)

• Upper-Intermediate level of English or higher

Would be a plus:

• Experience with crypto wallets

• Experience with video processing or streaming features