Sigma Software Group is HIRING A

Test Engineer, IoT

📍 Ukraine 🌐 Fully RemoteFull Time
POSTED October 6, 2025

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Tech Stack: iOS Postman

We are seeking a Test Engineer to join our big team and be a primary point of contact with the Customer on quality assurance matters. As a member of our team, you will have the opportunity to work with various products that share common functionalities. You will also develop a cohesive testing strategy that meets Customer needs and ensures high-quality results by collaborating closely with the team.

You will have a chance to challenge yourself, grow as a technologist and a professional, and make an incredible impact on the Customer's products.

CUSTOMER

PROJECT

The mission of the project is to deliver scalable, reliable, and secure solutions that accelerate time-to-market for new products while supporting the company’s global vision of transitioning to energy-efficient and sustainable technologies.

Job Description

  • Perform functional, integration, and regression testing of embedded software
  • Create and maintain test documentation (checklists, test cases, and bug reports)
  • Participate in release planning and synchronization meetings with the development team
  • Collaborate closely with developers, architects, and other QA engineers
  • Identify, log, and track defects until resolution
  • Contribute to the overall product and process quality according to company standards

Qualifications

  • 2+ years of experience as a Manual QA Engineer in embedded or firmware projects
  • Solid knowledge of testing methodologies and ability to write test cases and reports
  • Experience with bug tracking and test management systems
  • Basic hardware skills (flashing, setup, and diagnostics)
  • Experience with Unix platforms
  • Experience in network (understanding of TCP/UDP)
  • Experience with sniffers and debugging tools (ex. Charles, Wireshark)
  • Knowledge or experience with Modbus RTU/TCP/IP (protocol understanding, device testing, communication checks)
  • Knowledge or experience with EEBUS (energy management communication standard, interoperability testing, smart grid communication)
  • Hands-on electronics experience, including:flashing and debugging hardwaresoldering PCBs and performing small-scale repairs
  • flashing and debugging hardware
  • soldering PCBs and performing small-scale repairs
  • Knowledge or experience with Zigbee:protocol layers (APS, NWK, MAC), roles (coordinator, router, end device)network setup, pairing/unpairing, stability testinganalysis with Zigbee sniffers (Wireshark)testing scenarios: OTA updates, connection recovery, stress testing with multiple devices
  • protocol layers (APS, NWK, MAC), roles (coordinator, router, end device)
  • network setup, pairing/unpairing, stability testing
  • analysis with Zigbee sniffers (Wireshark)
  • testing scenarios: OTA updates, connection recovery, stress testing with multiple devices
  • Embedded Linux testing: CLI skills, log analysis (dmesg, journalctl, systemctl), networking (ping, tcpdump, Wireshark)
  • Firmware debugging: bootloader (U-Boot), flashing, boot log analysis
  • Experience in API testing (Postman, Bruno)
  • Upper-Intermediate level of English

Please mention you found this job on TestDev Jobs. It helps us get more people to hire on our site. Thanks and good luck!