Senior Android Developer — POS

Apply Now!

About SYSMNT

SYSMNT is a technology implementation partner building enterprise systems and digital platforms across the Kingdom. Our work spans retail, hospitality, fuel and energy, and services — sectors where the point of sale is the front line of the business, not an afterthought.
We're a lean team where engineers own their work end to end. If you like solving hardware-level problems and seeing them running in real stores rather than shipping features into a backlog, you'll fit here.

The Role

You'll own the Android POS layer of our retail platforms: the applications running on merchant terminals, the payment flows behind them, and the peripheral integrations that make them work. This is embedded, hardware-adjacent Android work with real constraints — limited memory, vendor SDKs that disagree with each other, and transactions that cannot silently fail.

Responsibilities

· POS Application Development

· Design, build, and maintain Android POS applications for Sunmi, PAX, and similar terminal families
· Integrate device peripherals: thermal printers, card readers, barcode scanners, cash drawers, customer displays
· Optimize for embedded environments with constrained memory, storage, and processing
· Ensure the application behaves correctly across differing SDK versions and hardware revisions

· Payments & Transaction Processing

· Implement payment flows against EMV contact and contactless standards
· Build and maintain transaction messaging over ISO-8583
· Handle financial data securely and in line with PCI-DSS and SAMA requirements
· Diagnose and resolve production transaction issues, including settlement and reconciliation mismatches
· Integrate with mada, local acquirers, and payment gateways

· Smart Card & NFC Integration

· Offline & Sync Reliability

· Design offline-first behavior so terminals keep transacting through connectivity loss
· Build reliable sync and queuing back to backend systems once connectivity returns
· Guarantee transaction integrity — no duplicates, no lost sales

· Architecture & Code Quality

· Design maintainable Android architectures in Kotlin and Java
· Build reusable abstraction layers that isolate vendor SDK differences behind a common interface
· Enforce coding standards, secure development practices, and meaningful code review
· Lead technical design discussions and own solution architecture for the POS layer

· Collaboration

· Work with backend, QA, and product teams to deliver complete flows, not just the client side
· Coordinate with terminal vendors, acquirers, and payment providers on integration and certification
· Mentor junior developers and raise the technical bar across the team

Requirements

· Bachelor’s degree in computer science, Software Engineering, or a related field
· 3–5 years of Android development experience, with meaningful time on POS or embedded devices
· Hands-on experience with POS hardware SDKs (Sunmi, PAX, or equivalent)
· Strong Kotlin and Java proficiency
· Practical experience with EMV contact and contactless flows
· Working knowledge of ISO-8583 message construction and parsing
· NFC and APDU-level card communication experience
· Familiarity with MIFARE, DESFire, and CPU card types
· Solid grasp of Android architecture patterns, lifecycle behavior, and performance profiling
· Comfortable debugging at the hardware boundary — logic analyzers, serial output, vendor logs
· Good communication in English; Arabic is an advantage

Nice to have

· Experience with mada certification or working through acquirer certification cycles
· ZATCA e-invoicing (Fatoora Phase 2) integration experience
· Arabic RTL interface development, including receipt printing in Arabic
· Backend familiarity (REST APIs, message queues) for end-to-end ownership
· Fuel retail, restaurant, or multi-branch retail POS background
· Experience with device fleet management and remote OTA updates
· PCI-DSS or secure payment development exposure

What We Offer

Apply Now!