> Markdown version of [/jobs/ext/4670895-applications-engineer](https://www.wearedevelopers.com/jobs/ext/4670895-applications-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Applications Engineer

- **Company:** Flow LLC
- **Location:** St. Louis, MO, United States
- **Contract:** Internship / Graduate position
- **Skills:** Application Programming Interfaces (APIs), Spreadsheets, Datasheets, Software Engineering, Data Processing, Industrial Software
- **Published:** November 11, 2026
- **Apply:** https://www.careerbuilder.com/job-details/applications-engineer-saint-louis-mo--7c0e2127-9de9-4680-a480-8d229229d4cb

## About the Role

Software Engineering, Biotech and Pharmaceutical, Petrochemicals, Manufacturing Equipment Maintenance, Food and Beverage Industry, Oil and Gas Refining, Manufacturing Software, Data Processing, Solenoids, Instrumentation, * Bachelor's degree in Mechanical, Chemical, or Electrical Engineering (or a closely related field), completed or expected within the next 6 months.

 * Coursework or interest in fluid mechanics, thermodynamics, or process control.
 * Clear written and verbal communication, and comfort working with customers.
 * Strong attention to detail and the ability to manage several tasks at once.
 * Entry-level candidates welcome; relevant industry experience is a plus., * Internship or co-op experience in manufacturing, process industries, or engineering services.
 * Exposure to P&IDs, valve or instrument data sheets, or sizing software.
 * Strong spreadsheet skills.

## Description

* Size and select control valves using manufacturer software, learning to evaluate Cv, pressure drop, noise, cavitation and flashing, trim and materials, and actuator requirements.
 * Size and select pressure relief valves per ASME Section VIII and API 520/526, working from customer process data and relief scenarios.
 * Help engineer automated valve packages: actuator sizing, accessories (solenoids, limit switches, positioners, filter regulators), and mounting hardware.
 * Select process and safety instrumentation (pressure, temperature, level, flow, gas detection) to fit process conditions and customer standards.
 * Review customer specifications, P&IDs, and process data sheets, and flag missing information or questions.
 * Prepare technical documentation: completed data sheets, sizing reports, drawings, and submittal packages.
 * Support troubleshooting of field problems alongside senior engineers and sales reps.

Quoting and customer support

 * Turn completed selections into clear, accurate quotes with support from the inside sales team.
 * Work with manufacturers to obtain pricing, lead times, and technical confirmation.
 * Answer technical questions from customers and outside sales reps by phone and email.
 * Join sales reps on customer visits and technical presentations as you build experience.