Welding Engineer / AWS D1.1 CWI

Job Overview

Fluidstack is seeking a Welding Engineer / AWS D1.1 CWI to join our team. We exist to make humanity more free by delivering 10 to 100s of GWs of compute faster than anyone else, rethinking every layer of the stack. We acquire power, design and build data centers, and operate them - with teams spanning hardware and software. Speed and scale are our key differentiators.

How We Operate

• Extreme ownership. Full autonomy. Own things end to end often taking on scope outside your core role without being asked to get things done.


• Velocity. We drive everything forward as fast as possible.


• First principles. Challenge every assumption. Zero analogy thinking, no egos, the best idea wins.


• Love of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.

Role Scope

• Write and qualify welding procedure specifications and procedure qualification records to AWS D1.1 for the structural and pressure-boundary welds in modular data center assemblies.


• Inspect and certify welds across the manufacturing line, signing off on the work an AHJ or auditor will not accept without a qualified inspector.


• Build the weld quality program for a factory producing data center modules at rate, setting the acceptance criteria, NDE requirements, and first-pass-yield targets.


• Qualify welders and welding operators, and stand up the continuity and requalification tracking that keeps the whole line certified.


• Drive down weld defect and rework rates by root-causing failures on the floor and feeding fixes back into procedures and fixturing.

What We're Looking For

You hold a current AWS Certified Welding Inspector (CWI) credential and have signed off on structural or pressure welds to AWS D1.1 or an equivalent code. You've written and qualified WPS and PQR documentation for production welding, not just reviewed someone else's. You've stood up or run a weld quality program in a manufacturing or fabrication environment producing at rate. You've qualified welders and managed the continuity records that keep a line's certifications valid. You root-cause weld defects on the floor and close the loop by fixing the procedure, the fixture, or the training, so the same defect doesn't come back. You read a weld map and a fabrication drawing and catch the problem before the first arc strikes.

Bonus: ASME Section IX or B31 piping. NDE certifications (UT, RT, MT, PT). High-volume or modular fabrication. Robotic or automated welding. Data center or mission-critical infrastructure fabrication.

Fluidstack is an Equal Employment Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, sexual orientation, gender identity, disability and protected veterans’ status, or any other characteristic protected by law. Fluidstack will consider for employment qualified applicants with arrest and conviction records pursuant to applicable law.