Controls Engineer, PLC Programming

Fluidstack

$200K — $250K *
Technical Services
Less than 5 years of experience
Job Overview by Ladders

Qualifications

  • 5-7+ years of experience in PLC programming for mechanical equipment
  • Proficient in multiple PLC platforms including Siemens and Codesys
  • Strong background in translating sequences of operations into functional PLC code
  • Hands-on experience with wiring and debugging PLCs and sensor installations
  • Ability to write structured, reusable code for improved team collaboration
  • Proven track record of thorough testing against edge cases and failure scenarios
  • Bonus: Familiarity with data center mechanical systems and integration protocols.

Responsibilities

  • Develop and test PLC programs for standard mechanical equipment across data centers
  • Write portable and efficient code for mixed PLC hardware environments
  • Collaborate with mechanical teams to develop and implement sequences of operations
  • Conduct initial installations and wire PLCs/sensors in a lab for program validation
  • Execute debugging of PLC programs against physical inputs and failure conditions

Benefits

  • Equity in the form of stock options
  • Commitment to pay equity and transparency
  • Opportunity to work with advanced control systems and technologies in data centers
Full Job Description
Role Scope
  • Develop and test template PLC programs for the standard mechanical equipment across every data center, chiller skids, fan wall units, CRAHs, and the rest, so one validated program deploys fleetwide instead of being rebuilt site by site.
  • Write portable code across mixed PLC hardware, Siemens, Codesys, and virtualized PLCs, so a program built once runs regardless of the controller underneath it.
  • Develop and tune sequences of operations with the controls and mechanical teams, then implement those SOOs directly in PLC code.
  • Install and wire PLCs and sensors in a lab environment, standing up real hardware to validate programs before they ever run on live equipment.
  • Debug programs against real IO and failure conditions on the bench so field commissioning becomes a verification step, not a debugging session.
What We're Looking For

The below is a starting point. We always make space for exceptional people, so if you don't fit this role exactly, tell us where you would.
  • You've written and tested PLC programs for mechanical equipment, chillers, air handlers, pumps, or similar, and watched them run on real hardware, not only in simulation.
  • You've programmed across more than one PLC platform, Siemens, Codesys, or virtualized environments, and you don't treat one vendor's toolchain as the boundary of what's possible.
  • You've turned a sequence of operations into working PLC code, and you've caught the gaps and contradictions in an SOO before they reached the controller.
  • You've wired PLCs, IO, and sensors yourself, and you've traced a fault down to the physical layer when a program that looked right on screen misbehaved on the bench.
  • You write structured, reusable code that the next engineer can read, so the templates you build get reused rather than rewritten.
  • You test against failure and edge cases, not just the expected path, and you find the problems in the lab instead of in a running data center.
  • Bonus: Data center mechanical systems (chiller plants, CRAH/CRAC, fan wall units). Structured Text and the IEC 61131-3 languages. BMS or SCADA integration over BACnet and Modbus. Hardware-in-the-loop or virtualized PLC testing.


Compensation: $200,000 - $250,000 per year, depending on experience, skills, qualifications, and location. Offers equity in the form of stock options.

We are committed to pay equity and transparency.

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