300k RPS on two vCPUs
A production Postgres kept breaking under hot-path reads. I replaced them with an in-memory cache invalidated straight off the replication log. The incidents stopped.
More →Panagiotis Siatras
Staff / Principal Software Engineer
Platform · Infrastructure · Distributed Systems · Architecture
I modernize production systems without stopping them.
Since 2008 I've owned the layer underneath everyone else: container orchestrators, distributed backups, billing, telemetry, and the shared libraries and custom tools teams build reliable software with. Go since it was ready for production, Ruby before that.
Athens, Greece · remote
Selected work
See more work →Five TypeScript pods, one Go pod
Rewrote a TypeScript distributed system in Go, one service at a time, behind proxies that learned how each one behaved first. Nobody noticed except the GCP bill.
More →Tens of thousands of vehicles, none offline
Built the platform that controls a micro-mobility fleet in real time, then cut over from the old one without taking a single vehicle off the street.
More →How I work
Architecture, migrations, platform engineering, and the production problems nobody wants. I'd rather build a prototype the team can pull apart than argue a design in the abstract.
Big changes go out in increments, behind proxies and flags, so the switch is boring by the time it happens. What I enjoy is raising the speed of the team around me, finding new answers to odd problems, and putting more into a deliverable than was asked for. The work I want is the kind that needs that.
Experience
NEFELOMA
Principal Consultant & Director
2019 – present
My own consulting company. The engagements below ran through it, all remote.
Smallstep
Consulting Software Engineer
2022 – present
PKI that runs around the globe. I own telemetry, builds and deployments, and the shared Go libraries every service is written with.
Fly.io
Consulting Software Engineer
2021 – 2022
Re-implemented the foundations of flyctl. Four years on, they're
still what the CLI is built on.
Pagely
Consulting Principal Software Engineer
2020 – 2021
Staffed the Go team on my own: container orchestrators, distributed backups, billing and payments.
Spin
Consulting Lead Software Architect
2019 – 2020
Built the IoT platform that runs the fleet, cut over live, then ran and extended it.
Earlier
Salaried roles and freelancing
2008 – 2019
Line-of-business software across industries, from real-time pattern recognition for stock exchanges to desktop applications for OB/GYNs.
Technologies. Go, Ruby on Rails · Postgres, Redis, protobuf, gRPC · OpenTelemetry · PKI · Linux, AWS, GCP, Kubernetes, Docker, GitHub Actions.
Contact
I'm after the hard version of the work: platform, infrastructure, backend architecture, or the migration that keeps getting deferred. Let me know what I can do for you at [email protected].