Joe PoznanskiSystems Atelier

Selected work

Systems made legible through proof.

Two flagship engineering systems, four focused technical studies, and an operational archive. Each stays framed by the decisions, evidence, and limits that make the result trustworthy.

01

01simulation2026

Cryogenic Flow Simulation

Rust process simulation informed by Siemens and Rockwell PLC experience: 29,500 entities at 30 Hz with fixed-seed replay.

Responsibility
Controls-domain translation, Rust workspace architecture, simulation implementation, capture pipeline, and artifact validation.
Strongest evidence
Measured scale, real-time recovery, and byte-identical deterministic replay for the 29,500-entity generated plant.
Read the case study

A ten-second silent loop: the overview transitions into coordinated valve movement, active transfer flow, and changing tank telemetry before returning to a stable frame.

Deterministic Stage 1 capture at 1920 by 1080.

02simulation2026

Conformal Cooling Channel Generation

ConformalFlow automatically designs cooling passages that follow an injection-mold cavity. The goal is to remove heat more evenly so molded parts can reach ejection temperature sooner, while keeping the geometry inspectable and compatible with complex internal passages enabled by metal additive manufacturing.

Responsibility
Prototype architecture, Python geometry and validation engine, React and Three.js workflow, deterministic evidence capture, and public-safe case-study verification.
Strongest evidence
A real browser-driven UI/API job completed in 1.1 seconds with 20 channel segments and four hashed exports; the separate split-mold command produced two watertight mold halves and a PASS report with two retained volume warnings.
Read the case study

A silent ten-second loop moves from the deterministic gear input through channel and split-mold evidence to the completed application state.

A 31-second chronology assembled from the accepted gear-cavity capture and its generated evidence figures.

Supporting work

Working technical demonstrations.

simulation

X-Plane Cabin Camera FOV Trade Study

A documented X-Plane replay compares four cabin camera views at the same flight moments, making the trade between a narrow 50-degree configuration and a wider 110-degree configuration visible frame by frame.

Two 250-second, four-camera composites and two matched bank comparisons show the 50-degree baseline-pitch configuration and the 110-degree negative-pitch configuration at the same documented flight moments.

tools

OpenXHC: Reverse-Engineering a CNC Motion Interface

A C++20 offline codec turned a closed, Windows-only CNC motion interface into a testable native Linux foundation, reconstructing 2,490 captured HID reports byte for byte with zero mismatches and matching machine coordinates within 0.0005 mm.

Across 14 owner-authorized move bursts, 2,490 real reports re-encoded byte-exact with 0 mismatches, and decoded machine coordinates agreed with the controller display within 0.0005 mm.

tools

Mac mini Wall Shelf: Agentic CAD, FEM, and Manufacturing Preparation

From Joe's requirements, Agentic AI produced the parametric CAD, four-case load analysis, convergence checks, support-free K1C toolpath, and visually inspected evidence package for a six-Mac-mini wall shelf.

The 48.8 N front-edge service case calculated 0.064 mm displacement and 1.42 MPa peak von Mises stress, a 3.5x margin against the selected 5 MPa PLA creep ceiling. The four-times front-edge case was transient analysis evidence, not a recommended service load.

tools

Black-Scholes Options Pricer in Rust and WASM

A Rust crate compiled to WebAssembly powers a live, in-browser European options pricer with real-time Greeks and no server round-trip.

A Rust crate compiled to WebAssembly provides browser-side European option prices and Greeks without a server round-trip.

Operational archive

Additional systems and recovery work.

operations

CLI Fleet Synchronization

A cross-machine CLI rollout standardized local tool behavior, client registration, and verification so the same workflow could be executed consistently across a small fleet.

Verification matrixTarget-by-target pass, skip, and blocker evidence without copying account-local state.

reliability

Remote Workstation Recovery

A practical recovery workflow for a remote workstation that looked broken from the outside but needed targeted triage, not blanket resets.

Layered triage matrixRole-labeled reachability, session, viewer, and tool checks separated client symptoms from host health.