Note: The job is a remote job and is open to candidates in USA. ON.energy is building the power infrastructure that makes the AI era possible. The Quality Assurance Engineer is responsible for hands-on experience in PLC programming, industrial protocol testing, and Python-based test automation, ensuring the quality of PLC-based control systems.
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
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
- 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
Benefits
- Competitive salary + annual performance-based bonus eligibility
- Medical, dental, and vision insurance
- 401(k) with company match
- Paid time off and company holidays
- Competitive salary + annual performance bonus eligibility
- Christmas Bonus (Aguinaldo): 30 days
- Major medical expenses and life insurance
- Paid time off and holidays (per local policy)
- Professional development and growth opportunities
- Opportunity to grow with a mission-driven team shaping the future of clean energy
- Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
- Accommodations: If you need an accommodation during the application process, email [[email protected]](mailto:[email protected])
- Benefits vary by role and location and are subject to change.
Company Overview
Battery storage IPP. A fully-integrated energy storage developer, technology company and asset owner. using proprietary software. It was founded in 2016, and is headquartered in Miami, Florida, USA, with a workforce of 51-200 employees. Its website is https://www.on.energy.