Full Stack Developer (Mobile & Backend Integration)

Overview:

You’ll collaborate with a cross-functional team to design and implement a highly secure mobile app SDK for enabling resilient payments along with a reference app using the SDK. You’ll work closely with product, architecture, and security specialists to deliver a robust, scalable, and secure solution.

Key Responsibilities:

• Develop native Android and iOS components (Kotlin/Swift) and backend integration points for proximity communication, payment flows, and secure transaction handling.

• Implement secure, resilient payment capabilities and seamless integration with financial platforms.

• Proactively participate in secure code review, remediation, threat modeling, and security testing across the development lifecycle.

• Design and implement developer-friendly APIs and modular SDK components with strong error handling, observability, and comprehensive validation through unit tests and functional tests

• Collaborate closely with team members, including architects, product owners, and security specialists; contribute to knowledge transfer and sustainable maintenance.

• Ensure compliance with relevant standards and regulations (e.g., OWASP MASVS, PCI, PSD2, EMV, GDPR) and maintain secure coding practices.

• Deliver in an agile environment with regular sprint demos and frequent progress updates.

Required Competences:

• Native mobile development for Android and iOS (Kotlin/Swift); experience with optional cross-platform options (React Native, Flutter) when appropriate.

• Proficiency in proximity communication technologies (NFC, Bluetooth, QR code) and device-to-device secure protocols.

• Hands-on experience with secure handling of sensitive data, and resilient transaction workflows.

• Strong secure coding practices, encryption, secure storage, and familiarity with Secure Elements/TEE.

• Ability to design and implement secure, modular SDK components and developer-friendly APIs.

• Knowledge of and experience with regulatory/compliance domains relevant to financial services (PCI, PSD2, EMV, GDPR).

• Experience with automated testing (unit, integration, security testing) and threat modeling.