Senior Full Stack Software Engineer – Mobile Payments

Duration: 3–6+ months
Project:
Building a new in-app payments platform (Apple Pay, Google Pay, cards) for iOS and Android.

Must-have:
• Proven experience building critical parts of payment gateways (not just integration)

Key Responsibilities:
• Develop native SDKs for iOS and Android (secure payment UI + wallet integrations)
• Build and integrate backend APIs (tokenization, authorization, refunds, voids)
• Create wallet pass-through services for multiple processors
• Support developer portal (onboarding, sandbox, key management)
• Ensure PCI DSS compliance, secure coding, and high reliability

Qualifications:
• Strong experience in backend + mobile (Swift, Kotlin, Java, .NET, or similar)
• Deep knowledge of payments, tokenization, and wallet technologies
• Security-first mindset with proven work in high-performance APIs/SDKs