Job description
Title: Quality Assurance Engineer, PLC Automation
Location: Remote/Hybrid
Term: FTE, Direct Hire
Position Overview
Our client is building the backbone of energy and AI infrastructure powering grid-safe data centers and mission-critical facilities. The company supplies and operates hyperscale power systems that solve the toughest resilience challenges, delivering custom solutions for AI data centers, mission-critical facilities, and front-of-the-meter assets. Our client recently announced a 5GW partnership, with 3GW currently under construction across multiple hyperscale data center campuses. With patented technology and proprietary software, our client develops projects worldwide that set new benchmarks for resilience.
The Quality Assurance Engineer is responsible for hands-on experience in PLC programming, industrial protocol testing, and Python-based test automation. Skilled in designing and executing functional and integration test cases across PLC platforms and communication protocols.
Key Responsibilities:
Design, develop, and execute Unit tests, functional, integration, and regression test cases for PLC-based control systems
Write and maintain Python-based automated test scripts for testing PLC I/O, HMI interfaces, and communication protocols
Develop, review, and validate PLC code (Ladder Logic, Function Block Diagram, Structured Text) across Siemens S7-1200/1500
Collaborate with controls engineers to define acceptance criteria and validate system requirements
Identify, document, and track defects using tools such as Azure Devops or equivalent; lead root cause analysis for critical failures
Conduct Hardware-in-the-Loop (HIL) and Software-in-the-Loop (SIL) testing where applicable
Produce clear test plans, reports, and traceability matrices aligned with release timelines
Required Experience & Skills
University degree in Software Engineering, Computer Science, Quality Engineering, or a related technical field.
5+ years of hands-on experience in PLC programming and testing across Siemens platform.
5+ years of experience building and maintaining automated test frameworks using pytest or equivalent python framework.
3–5 years of experience with Siemens TIA Portal for PLC development, diagnostics, and commissioning support.
Experience designing and executing functional and integration tests, including test case development, defect tracking, and validation of fixes.
Working knowledge of industrial communication protocols such as S7, Modbus TCP/RTU, and OPC-UA.
Preferred Experience
Proficiency in automated unit testing the PLC Logic
Experience with SCADA systems
Familiarity with Agile / Scrum methodologies in industrial settings
Knowledge of functional safety standards such as IEC 61508 / IEC 62061
Originally posted on Himalayas
Who can apply
Eligible countries: United States. Accepted UTC offsets: UTC-10, UTC-9, UTC-8, UTC-7, UTC-6, UTC-5, UTC+14. Review the full description for employer-specific work authorization, residency and schedule requirements.