Now#
I’m Reyn Hartono. I work as a hands-on engineer and tech lead: backend, SRE/infrastructure, and security.
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. I helped 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.
How I work#
I care about reliability and security while the system is still being designed. Failure should be explainable, recovery should be something we can run, and authorization should stay tight. Services should remain operable under load. Automation should make the safe path the usual one.
Proof (sanitized)#
- 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.
- Designed and implemented Stripe callback and payment tracking so provider events and internal state stay consistent.
- Early SRE hire at Verihubs: IaC, Kubernetes, GitOps (ArgoCD), multi-cloud networking, centralized observability.
- 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.
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 habit never really left: understand the system, then harden it.
