Voidctx
Available for contracts

Systems engineering
without the bloat.

Independent engineer. I build backends that are fast, cryptographic systems that are safe, and runtimes that run where frameworks refuse to go. If your problem has a hardware budget, let's talk.

>85%
Cloud cost reduction via lean architecture
~0.8 MiB
Full cloud IDE RAM footprint on Pi Zero
0-dep
Crypto engines, zero supply-chain risk
Engineering Services

What I build for clients

Direct implementation from an engineer who goes from bare metal to API surface. No agency overhead, no middle layers.

01
High-throughput backends & APIs
Lean Rust or Go engines. Eliminate GC pauses, optimize concurrency, scale under extreme traffic without throwing hardware at it.
Rust / Go async I/O P99 latency
02
Cryptographic & auth infrastructure
WebAuthn Passkeys, hardened storage, and zero external dependency risk. Security as an engineering discipline.
WebAuthn L3 AES-256-GCM zero-dep
03
Linux & Android internals
Kernel modules, eBPF telemetry, Android HAL integration, and constrained hardware tuning. Deep OS work most engineers avoid.
eBPF AOSP Binder IPC
04
Embedded & firmware
ESP32, USB OTG, TinyUSB, bare-metal firmware. Hardware-software integration where you can't afford a bloated runtime.
ESP32-S3 TinyUSB bare-metal
05
Self-hosted infrastructure
Cloud-agnostic, vendor-independent deployments you actually own. DNS, VPN, reverse proxy, firewall — no SaaS lock-in.
self-hosted DNS / VPN no lock-in
06
Protocol & blockchain
Custom protocol design, smart contracts, signing systems, on-chain auth. Cryptography as engineering, not marketing.
protocols signing on-chain auth
Open Source

Selected work

Public, auditable, and intentionally disciplined. These exist to prove what's possible without a dependency tree.

CRYPTOGRAPHY

CredShell

Local-first WebAuthn Level 3 Passkey authenticator and encrypted TOTP vault. Zero external crates, zero daemons, hardware-accelerated AES-256-GCM.

Zero crates WebAuthn L3 AES-256-GCM Ed25519
CLOUD IDE

ArkCode

Full cloud development environment — editor, file tree, PTY terminal, multi-file search, WebSocket LSP — in under a megabyte of RAM. Runs on a Raspberry Pi Zero.

Sub-MiB RAM WebSocket LSP PTY terminal Pi Zero
Stack

Languages & tools

Not a framework collector. Tools chosen for correctness, performance, and control.

Systems
Rust C Go Linux Kernel eBPF AOSP ARM / x86
Backend & APIs
Node.js (ESM) WebSocket HTTP/2 PostgreSQL Redis async I/O
Security & Cryptography
WebAuthn / FIDO2 AES-256-GCM PBKDF2 Ed25519 TOTP
Embedded & Infra
ESP32-S3 TinyUSB Docker self-hosted DNS / VPN
Let's work

Got a hard problem?

If your backend is slow, your infra is bloated, or you need something built the right way — let's talk. I work with founders, engineering leads, and anyone who cares about the craft.