SST Systems Architect, Technical Lead

Fluidstack•New York, NY

13d•$208,000 - $263,000

About The Position

Fluidstack is building civilization-scale infrastructure for AI, aiming to deliver gigawatt-scale compute faster and denser than the grid-standard supply chain allows. The Product Engineering Team, specifically the SST group, is designing solid-state transformers (SSTs) as a core building block of the power architecture. This involves architecting medium-voltage SSTs for manufacturing, servicing, and scaling, defining interfaces with MVDC distribution systems, building a robust semiconductor and magnetics supply strategy, and taking converter hardware from topology selection to working prototypes on a critical timeline. This role requires extreme ownership, velocity, first principles thinking, and a deep commitment to the problem space. The Product Engineering Team operates with a focus on speed and scale, rethinking every layer of the stack to achieve their mission.

Requirements

15+ years in power conversion
Led an SST or MV converter program at the level of ABB/Hitachi Energy research, GE, Delta, EPRI, or a FREEDM/ETH/Aachen lineage lab.
Owned converter topology selection, semiconductor strategy, and system trade-offs at MW scale, and can defend the choices made.
Led converter development teams from architecture through working hardware, not just papers or simulations.
Knowledge of the SiC ecosystem sufficient to write a five-year semiconductor strategy in a market where 10kV devices barely exist.
Experience navigating programs that have failed or nearly failed, understanding the reasons and knowing what to do differently.
Ability to write a 12-month program plan for 8 engineers and defend it line by line.

Nice To Haves

Medium-frequency transformer design depth
MVDC system integration experience
Established vendor and university research relationships
Certification exposure for MV power conversion

Responsibilities

Architect the SST end to end, selecting the topology (ISOP DAB stacks, MMC-based, or another approach) and semiconductor strategy, with every choice defended on efficiency, redundancy, manufacturability, and device availability.
Lead the power electronics, magnetics, and controls engineers from architecture to working hardware, owning the technical decisions that get prototypes built rather than debated.
Own the system trade-offs and the interface with the MVDC systems team, writing down exactly where the SST stops and the system begins, precisely enough that both teams can design against it.
Build the program plan and prototype roadmap, and make the build-vs-partner recommendation honestly, including the case where partnering is the right answer.
Develop vendor and research partnerships across device makers, labs, and universities that secure the devices, test capacity, and expertise the program needs.