Portfolio | Kevin (Min) Sohn

Selected Work

Personal systems and product prototypes covering safer deployments, monitoring, infrastructure automation, and day-to-day operational problems. Each project is labeled by its current status.

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Infrastructure and Product Work

Your Signal

URL

Personal uptime-monitoring service with a blue/green deployment pipeline. An idle systemd instance is updated and health-checked before Caddy switches traffic; a database-backed leader lease coordinates monitoring jobs to avoid duplicate checks during deployment. Currently used internally.

Internal use
Release engineering
Go

ASMT Dashboard

URL

Open-source Go dashboard for monitoring Linux servers, focused on service health, log visibility, and fast operational status review from a lightweight agent.

Open source
AGPL-3.0
Observability

WaterFire

Personal-use Schwab autotrader running on GCP, built in Python with SQLite and a state-driven scheduler. AI is limited to sentiment refinement and tie-break decisions.

Personal use
GCP
Scheduled workloads

Meemyo

URL

Personal product prototype: a speed-first Go CMS with RBAC, server-rendered themes, reusable content modules, and an asynchronous image pipeline.

Prototype
Go
Product design

Home Observability Lab

Active personal system

Run a home lab for software development with VMs hosted on TrueNAS, an OPNsense router/firewall, and an Intel NUC. Deploy the central monitoring stack through Docker Compose.
Collect logs and metrics with Grafana Alloy, rsyslog, and node/process exporters feeding Loki and Prometheus. Grafana dashboards cover host health and network activity.
Review OPNsense firewall logs for suspicious traffic and report suspicious source IPs through the AbuseIPDB API.
Use authenticated HTTPS over LAN/WireGuard and source-restricted log ingestion. The dashboards have helped identify post-reboot monitoring failures, temporary DNS failures during upgrades, and misleading startup alerts.