Now#
I’m Reyn Hartono. I work as a hands-on engineer with tech lead scope: backend, SRE/infrastructure, and security, with a clear focus on reliable and secure design.
Most recently I was Engineering Team Lead at The Software Practice (Singapore, remote) — close to the code, delivery, and production quality. Before that I was a Site Reliability Engineer, then Senior SRE, at Verihubs, helping stand up SRE practice, multi-cloud infrastructure, GitOps, and observability.
I’m open to senior backend and SRE/infrastructure roles, and to technical leadership where I stay hands-on.
Remote · global · full-time or contract.
What I optimize for#
Reliability and security are design inputs, not a final checklist:
- Failure modes you can explain; recovery you can run
- Least privilege and tight authorization
- Services and platforms that stay operable under load
- Automation that makes the safe path the default
Proof (sanitized)#
- Capacity on the same footprint: raised a production service path from ~100 rps to ~3,000 rps without scaling the infra out — microservices behind KrakenD (Go), Python FastAPI services (auth + domain), SQS-backed async work, PostgreSQL.
- Payments: designed and implemented reliable Stripe callback/payment tracking so provider events and internal state stay consistent.
- SRE foundation: early SRE hire at Verihubs — IaC, Kubernetes, GitOps (ArgoCD), multi-cloud networking, centralized observability.
- Security research: reported vulnerabilities to multiple companies, including Bukalapak (others asked not to be named).
How I lead#
As a tech lead, I stay hands-on: shipping, reliability, and incidents. I work with product, PM, and QA as needed, and I keep the design bar on reliable and secure systems visible in day-to-day decisions.
Stack#
| Area | Strong / recent |
|---|---|
| Backend | C# / .NET Core, PHP / Laravel; also Java, Node.js. Open to Go and deeper Java |
| Cloud | GCP, AWS |
| Infra | Terraform/OpenTofu, Ansible, Docker, Kubernetes, Helm, bare metal where it matters |
| CI/CD | GitLab CI, ArgoCD |
| Observability | Grafana, Loki, Tempo, VictoriaMetrics |
| Data | PostgreSQL, MySQL, Redis, SQLite |
| Network | TCP/IP, VPNs, API gateways (incl. KrakenD), packet analysis, MikroTik, FortiGate |
| Edge / email | Cloudflare (see CFEG) |
Background#
I started programming young on a family PC with a single Visual Basic 6 book. That early habit — understand the system, then harden it — never really left.