Software Systems Validation Engineer II

Lennox International • Carrollton, TX

12h • Onsite

About The Position

Lennox is seeking a motivated early-career Software Systems Validation Engineer to support the validation of embedded controllers used in innovative commercial HVAC solutions. This role is ideal for an engineer with approximately 2 years of experience in embedded systems testing, software validation, or systems engineering who is looking to grow within a collaborative product development environment. As part of the validation team, you will help ensure the quality, reliability, and performance of embedded HVAC controller systems by supporting testing activities across hardware, firmware, and communication interfaces. The ideal candidate is hands-on, detail-oriented, eager to learn, and comfortable working in a fast-paced engineering environment.

Requirements

• Bachelor’s degree in Electronics Engineering, Computer Engineering, Computer Science, or related technical field.
• 2+ years of experience in software validation, embedded systems testing, or related engineering roles.
• Understanding of embedded systems, microcontrollers, firmware, and real-time operating systems (RTOS).
• Exposure to programming languages such as C, C++, C#, or Python.
• Familiarity with debugging hardware/software interfaces.
• Exposure to scripting or automation tools such as Python.
• Familiarity with communication protocols such as UART, I2C, SPI, CAN, or BLE.
• Strong analytical and problem-solving skills with attention to detail.
• Eager to learn and develop technical expertise in embedded systems validation.
• Strong collaboration and communication skills.
• Able to manage multiple assignments in a fast-paced environment.
• Self-motivated with a proactive approach to problem solving.
• Adaptable and willing to support changing project priorities and timelines.
• Detail-oriented with a focus on product quality and continuous improvement.

Nice To Haves

• MS is preferred
• Experience working with test management or defect tracking tools such as Azure DevOps or Jira.
• Familiarity with version control systems such as Git.
• Internship, co-op, or professional experience in HVAC, automotive, industrial controls, consumer electronics, or other embedded systems industries.

Responsibilities

• Assist in developing and executing validation plans for embedded HVAC controller systems.
• Create and maintain test documentation, including: Test plans and test procedures, Manual and automated test cases, Test execution records and defect reports, Validation summary reports.
• Execute functional, integration, and regression testing activities throughout the Software Testing Life Cycle (STLC).
• Support troubleshooting and debugging of hardware/software interactions using lab equipment such as oscilloscopes, logic analyzers, and protocol analyzers.
• Work closely with software engineers, hardware engineers, and systems teams to identify issues and verify fixes.
• Help develop and maintain automated test scripts and validation tools to improve test efficiency and coverage.
• Document software and system defects clearly and collaborate with development teams on resolution efforts.
• Participate in continuous improvement initiatives related to testing processes, automation, and product quality.
• Support project timelines by completing assigned validation activities on schedule.

Benefits

• tuition reimbursement
• medical, dental, and vision insurance
• prescription drug coverage
• 401(k) retirement plan
• short-term disability insurance
• 8 weeks paid birthing leave
• 2 weeks paid bonding leave
• life and long-term disability insurance
• 12 days paid time off
• 2 paid well-being days
• 1 paid volunteer day
• 9 to 11 paid company holidays depending on the year
• 3 floating holidays per year

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level