About The Role
As a Senior Mobile Engineer (POS Terminal), you will be responsible for building, optimizing, and maintaining high-performance Android-based POS applications used across large-scale transaction environments.
You will work closely with Mobile Architects, Backend Engineers, Product Managers, and Hardware teams to deliver reliable, secure, and scalable POS features. This role requires strong hands-on Android expertise, deep understanding of payment flows, and experience integrating with POS hardware and EMV standards.
You will own complex features end-to-end while contributing to system design discussions and ensuring engineering excellence across the codebase.
What You'll Get To Do
Feature Development & Ownership
Design, implement, and maintain Android-based POS terminal applications (Java/Kotlin).
Own end-to-end development of key transaction flows (sales, refunds, reversals, settlement).
Collaborate with backend teams to integrate APIs and ensure reliable transaction synchronization.
Implement offline-first capabilities and manage edge-case handling in low-connectivity environments.
Payments & Security
Integrate EMV chip, contactless (NFC), and card-present transaction flows.
Work with encryption standards, key management processes, and secure payment SDKs.
Ensure compliance with payment security best practices.
Troubleshoot and resolve transaction-related issues in production
Hardware Integration
Integrate and maintain support for POS peripherals (card readers, pin pads, printers, scanners).
Work with OEM SDKs for Android-based POS terminals.
Handle Bluetooth, USB, and embedded hardware communication layers.
Code Quality & Engineering Standards
Write clean, maintainable, testable code following established architecture patterns.
Participate in code reviews and provide constructive feedback.
Contribute to improving CI/CD pipelines and release processes.
Support debugging, monitoring, and performance optimization efforts.
Collaboration & Mentorship
Work cross-functionally with Product, QA, and Backend teams to deliver high-quality features.
Mentor mid-level engineers and support onboarding of new team members.
Participate in sprint planning, estimation, and technical discussions.
To succeed in this role, you should have
Minimum of 5+ years of experience in Android app development
A degree in Computer Science, Engineering or a related subject
Strong expertise in Android Native development (Kotlin/Java).
Experience building or maintaining POS terminal applications.
Solid understanding of EMV standards and card-present transaction flows
Experience integrating payment SDKs and hardware peripherals.
Familiarity with REST APIs, WebSockets, and background sync mechanisms.
Experience with local storage solutions (Room, SQLite).
Strong debugging and performance optimization skills.
Understanding of secure coding practices in financial systems.
Ability to work effectively in a fast-paced, high-ownership environment.
Experience working in fintech or high-transaction environments.
Exposure to cross-platform frameworks (e.g., Flutter).
Experience working with Android-based embedded POS terminals.
What We Can Offer You
Culture - We put our people first and prioritize the well-being of every team member. We've built a company where all opinions carry weight and where all voices are heard. We value and respect each other and always look out for one another. Above all, we are human.
Learning - We have a learning and development-focused environment with an emphasis on knowledge sharing, training, and regular internal technical talks.
Compensation - You'll receive an attractive salary, pension, health insurance, paid leave plus other benefits.