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Matt Ji

Senior Systems & Infrastructure Engineer

Go • NixOS • Concurrency • Energy & Quantitative Infrastructure

Systems engineer with a background in engineering, quantitative economics, and energy systems (Colorado School of Mines & University of Freiburg). I design concurrent Go services, declarative NixOS fleet infrastructure, and quantitative data pipelines. Experienced managing risk and telemetry across $100M+ in renewable capital assets.

OPS: $100M+ ASSETS

STACK: GO & NIXOS

EDUCATION: MINES & FREIBURG

AUTH: US & GERMAN PR

• Status: US Citizen · German Permanent Residence (Niederlassungserlaubnis)
• Languages: English (Native) · German (Fluent C1)
• Setup: 100% Remote (CET / US-East) · Available on short notice

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Core Systems & Fleet Infrastructure

Deterministic Go servers, append-only event ledgers, and zero-drift declarative Linux fleets.

Bountystash: Deterministic Work Engine

GO SERVER

Creator & Architect · 2024 — Present

A thin, server-rendered Go application turning unstructured task requirements into immutable, content-addressed specifications. Features an append-only event ledger, a keyboard-first terminal UI, and curl-friendly endpoints with zero frontend bloat.

• Single-binary deployment with sub-millisecond route resolution
• Content hashes & projection quotient hashes for tamper-evident versioning
• Dual-surface: readable markdown for agents, clean HTML for browsers, TUI for humans

Inspect Source Code (GitHub) →

Multi-Host Declarative NixOS Fleet

NIXCONFIG

Production-Grade Infrastructure · Active

Fully reproducible multi-host fleet (NAS, workstations, cloud endpoints) managed with Nix Flakes. Features a custom SSH Certificate Authority with automated dynamic cert rotation, age/SOPS secret encryption, automated morning kernel boot validation, and a Taskfile control plane.

• Zero manual server configuration or configuration drift
• Short-lived SSH certificates (rotate-ssh-cert) eliminating authorized_keys clutter
• ZFS/Btrfs storage, ZRAM tmpfs IO diet, and hermetic CI/CD automation

Inspect Fleet Config (GitHub) →

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Algorithmic State Machines & Research

Novel radix encodings, bounded per-step work stream sensing, and tokenization research.

fibtransponder: Fibonacci-Radix Streaming State Machine

GO RESEARCH BASELINE

Research & Implementation (Go 1.25+) · 2026

An experimental semantic sensing and tokenization substrate built around a Fibonacci-radix streaming state machine (FSVM). Evaluates bounded per-step work bitstream ingestion while tracking dilation, zero-run markers, and state sketches.

• Canonical Thesis: Structural calibration via adjacency width is demonstrated; width selects locality sensitivity.
• Corpus Falsification: Proved that seed-only Zobrist calibration does not create detector diversity.
• Sensitivity Shift: Varying adjacency width triggers a demonstrable prose-first to code-first sensitivity transition.

Repository & Spec (GitHub) → Corpus Report →

Core Technical Arsenal

Systems & Concurrency

Go (Channels, Mutexes, Memory Budgets), Python (AsyncIO), Kafka, PostgreSQL, Redis, gRPC.

Declarative Linux & Infra

NixOS Fleets, Nix Flakes, SSH CAs, SOPS/Age, Docker, ZFS/ZRAM, Linux Kernel Tuning.

Domain Mathematics

Fibonacci Radix, Time-Series Telemetry, Financial Modeling, Typst Geometric Typography.

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Clean Energy & Quantitative Asset Scale

High-stakes commercial asset steering, dynamic financial modeling, and bank-audited telemetry.

Renewable Energy Capital Asset Operations ($100M+)

O3 ENERGY & FRAUNHOFER ISE

Asset Manager & Quantitative Lead · 2016 — 2020

Directed data architecture and commercial asset steering for a utility solar energy portfolio exceeding $100M+ in capital value. Developed automated data capture and dynamic financial yield models scrutinized under strict institutional bank audits.

• Governed quantitative operations across $100M+ in capital assets
• Coordinated technical due diligence across complex M&A transactions with institutional lenders and tax equity partners
• Automated laboratory instrumentation and numerical solar data processing in C++ and Python during graduate research at Fraunhofer ISE

Discuss Architecture & Quant Ops →

Deterministic Typst Resume Engine

ANTIGRAVITY WORKFLOW

A local build pipeline compiling structured JSON data directly into pixel-perfect A4 PDFs using Typst. Enforces strict geometric typographic ratios (φ = 1.61803) and sub-second compilation, replacing bulky LaTeX and HTML-to-PDF toolchains.

• Single source of truth across PDF resume, cover letters, and web portfolio
• Hermetic compilation without runtime Node.js or browser headless overhead

Inspect Workflow Pipeline (GitHub) →

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Education & Research Roots

M.Sc. Renewable Energy Management

2011 — 2014

Albert-Ludwigs-Universität Freiburg (Final Grade: 1.8 / 5.0)

University Portal →

B.S. Petroleum Engineering

2006 — 2010

Colorado School of Mines (Minors in Economics & Public Policy)

School of Mines Portal →

How I Build

Reproducibility First

If an infrastructure state or binary cannot be built deterministically from code, it doesn't exist. Flakes prevent drift.

Domain Over Buzzwords

Understanding financial formulas, energy units, and bitstream geometry prevents architectural failures before writing code.

The 14KB TCP Rule

This entire 3D spatial site compiles into under 11KB gzipped. Zero WebGL bloat. Instant single-roundtrip load.

Ready to build? Reach out for systems, backend, and infrastructure advisory.

matt@bountystash.com GitHub Profile