Senior Software Engineer: Backend

Who We Are

PAYTAG builds self-checkout, RFID, and retail automation systems — physical products running in live stores that connect hardware to cloud services in real time. Our stack spans embedded Linux devices, IoT protocols, and GCP-hosted services. We ship things that exist in the real world, not just in the cloud.

We're looking for an experienced engineer with expertise in both robust backend systems and the on-prem software that maintains the hardware.

What You'll Own

Design and develop Linux-based products end-to-end — from device-side software to cloud integration

Write production Python and Shell scripts for hardware integration layers, backend services, and automation

Connect devices to GCP infrastructure (Cloud Run, Compute VMs) and third-party systems

Integrate hardware peripherals using TCP/IP, WebSocket and REST protocols

Troubleshoot and optimize real-world deployments — live hardware, live customers

Work directly with customers and partners on integrations and technical escalations

Contribute to product architecture and shape the technical roadmap

What We're Looking For

B.Sc. in Software/Electrical Engineering, Computer Science, or equivalent hands-on experience

5+ years with Linux-based systems

Strong Python skills; working knowledge of the Linux OS

Hands-on experience with low-level communication protocols: TCP/IP and WebSockets.

Experience with GCP (Cloud Run, VMs)

Customer-facing experience: integrations, on-site support

High ownership mindset and strong problem-solving skills

Bonuses:

IoT projects

Experience with ClickUp, Jira, or Monday

Familiarity with SolidWorks for reviewing hardware models

RFID and controller technology

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