Software Engineer - Industrial Systems

SUN Automation is seeking a highly capable Software Engineer to join our team in building a next-generation Human Machine Interface (HMI) for corrugated systems powered by Siemens Unified Architecture. This role sits at the intersection of industrial automation and modern web/backend engineering.

You will play a key role in designing and implementing a custom HMI using a combination of React (frontend), Python/C++ (backend services), and potentially Elixir. A major component of the role involves integrating with PLCs via OPC UA, requiring both systems thinking and real-world industrial experience.

RESPONSIBILITIES

• Design and build a responsive, real-time HMI using React and modern JavaScript/TypeScript.
• Develop backend services in Python for data acquisition, processing, and API layers.
• Architect and implement reliable communication with Siemens PLCs via OPC UA.
• Build and maintain scalable, fault-tolerant cloud systems (leveraging Elixir for concurrency-heavy components).
• Collaborate with controls engineers to map machine recipes into easy-to-understand operator interfaces. 
• Implement real-time data streaming, alerting, and visualization systems. 
• Ensure system reliability, observability, and performance in industrial environments. 
• Contribute to deployment pipelines and edge/on-premises system architectures. 
• Write clear documentation and participate in code reviews. 

QUALIFICATIONS

• Strong proficiency in JavaScript/TypeScript, especially with React required.
• Experience building robust backend systems in Python or C++ required.
• Hands-on experience with OPC UA required (client/server implementation, data modeling, security).
• Solid understanding of distributed systems, networking, and API design required.
• Experience working with industrial automation systems, PLCs, or SCADA/HMI platforms required.
• Familiarity with asynchronous programming and real-time data handling required.
• Ability to debug complex interactions between hardware and software systems required.
• Experience working with Siemens PLCs preferred (e.g., S7 series, TIA Portal ecosystem). 
• Exposure to Elixir/Erlang or other high-concurrency, fault-tolerant systems preferred. 
• Knowledge of industrial protocols beyond OPC UA preferred (e.g., Modbus, Profinet). 
• Experience deploying software to edge devices or on-prem industrial environments preferred. 
• Familiarity with containerization (Docker) and CI/CD pipelines preferred.
• Understanding of cybersecurity practices in industrial networks preferred.

BENEFIT SUMMARY

• Health and Wellness: Medical; Dental; Vision.
• Financial Future: 401k Plan with Company Match; Bonus Program (variable annual bonuses based on company performance); Employee Stock Ownership Plan (annual ESOP stock allocations after meeting eligibility criteria).
• Well-being and Support: Wellness Program; Education Assistance; Paid Time Off.
• Safety and Comfort: Safety Shoe and Prescription Safety Glasses Program; Seniority Recognition Program; Employee Assistance Program.