About
Harumi Morikawa
Platform / Backend Engineer
I am a platform-minded software engineer who learns by operating, not by watching tutorials. I run a two-node Kubernetes cluster end to end — GitLab, ArgoCD, Camunda, and my own applications — and I treat every incident on it as course material that I write up afterwards. What you see on this site is not a portfolio of demos; it is the running system itself.
- Location
- Based in Japan
- Languages
- 中文 · 日本語 · English
- Focus
- Platform engineering · Backend · Workflow systems
How I work
Verify against the source of truth
A debug pod is not the node. ArgoCD “Synced” is not a deploy. I check the real thing — Envoy stats, the host’s own systemd, the actual tag-bump commit — before calling anything done.
Remove, don’t layer
When a speculative fix turns out to be wrong, I take it out and write down why — instead of stacking a second fix on top of it.
Ship, listen, revert honestly
I shipped a front-panel display hack, heard “not legible at a glance”, and reverted it rather than defending it. The lesson stayed; the bad version did not.
Capabilities
What I work with
OPERATE
Kubernetes · GitOps · Gateway API · Linux
BUILD
Spring Boot · Kafka · PostgreSQL · Next.js
INVESTIGATE
Envoy · Distributed systems · Incident analysis
Show the full technical list
Platform & operations
Backend
Frontend
Ways of working
CURRENT / 2026
Current focus
I am currently extending my platform and backend experience into AI-assisted engineering systems — operational search, knowledge retrieval and workflow automation.
Platform reliability
AI-assisted document processing
Operational writing
GitLab activity
Daily activity from the self-hosted GitLab — counts only, no repo names or messages.
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Case studies on this site cover personal production systems and home-lab infrastructure only — none of them describe an employer's environment, and no organizational details, identifiers or internal data appear anywhere on this site. The home lab is not a company environment — it is where deployment, identity, networking, observability and operational decisions get verified continuously.
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