Controls Engineer: Virtualized PLCs & Software Controls

Fluidstack; Seattle (WA); On-site; USD 197,000 - 227,000; Full time

Job summary

Fluidstack in Seattle, WA is seeking an experienced engineer to design and implement a virtualized PLC platform for AI infrastructure. You will port control applications to virtual runtimes, ensuring determinism and safety while building test harnesses to prove behavior before deployment.

This role values hands-on experience with IEC 61131, virtualization, and software PLCs; bonus for Codesys, RT-Linux, and BMS/EPMS; Fluidstack commits to pay equity and transparent practices.

Qualifications

• Industrial controls programming experience with PLC platforms and IEC 61131 languages.
• Experience with virtualization or software-based control runtimes.
• Ability to test control logic with deterministic behavior and safety considerations.
• Ability to document control narratives for engineers and operators.
• Bonus: experience with Codesys, software PLCs, hypervisors, real-time Linux, BMS/EPMS applications, or functional safety.

Responsibilities

• Engineer the virtualized PLC platform: control logic moving from proprietary boxes to software-defined infrastructure.
• Port and validate control applications onto virtual runtimes without compromising determinism or safety.
• Build test harnesses that prove virtual controls against hardware behavior before a site sees them.
• Define the reference architecture: networking, redundancy, and failover for controls as software.

Skills

Industrial controls

PLC (IEC 61131)

Virtualization

Control runtimes

Determinism

Documentation

Tools

Codesys

Hypervisors

Real-time Linux

BMS

EPMS

Job description

Fluidstack in Seattle, WA is seeking an experienced engineer to design and implement a virtualized PLC platform for AI infrastructure. You will port control applications to virtual runtimes, ensuring determinism and safety while building test harnesses to prove behavior before deployment.

This role values hands-on experience with IEC 61131, virtualization, and software PLCs; bonus for Codesys, RT-Linux, and BMS/EPMS; Fluidstack commits to pay equity and transparent practices.