// about
I work a layer below where most people stop looking, in the event-driven pipelines, real-time systems, and internal tooling a team leans on without thinking about it. The tooling is the part I can't leave alone. Hand me a deploy step that takes minutes and I'll turn it into a save-and-refresh loop, or a build everyone quietly works around and I'll keep sanding it down until the path to production feels boring in the best way.
Obstacles tend to make me dig in rather than back off. When a serializer I needed had vanished from the codebase and no one could find it, I wrote one that round-tripped every record in production. When an upload kept failing for no reason anyone could name, I tracked it to a single invisible byte at the front of the file. The parts of a system nobody else volunteered to learn are usually where I end up.
Most of my career has been Node.js and TypeScript backends at scale. At Keller Williams I built data pipelines and saved-search notifications for a platform serving 180K+ agents, plus a white-label product that retired a third-party vendor and cut roughly $2.7M a year. A long run through PHP, Node, TypeScript, and Go is what pulled me toward Rust, where most of my attention goes now, down to the FFI layer. Outside work I run a single-node Proxmox homelab and build small CLIs and TUIs, usually because the tool I wanted didn't exist yet.
ssh whoami.tsilenz.io See what my SSH server knows about you. Built in Rust.
// experience
Senior Software Engineer
Keller Williams Realty
Built event-driven data pipelines, real-time notification systems, and cross-platform services for a consumer real estate platform serving 180K+ agents. Built a Rust CLI that replaced a multi-day manual translation-import process with a single sub-30ms command.
Senior Software Engineer
Apricity Health
Designed a distributed tracing and logging system for healthcare microservices, correlating frontend and backend events across dozens of cloud functions.
Senior Software Engineer
Genband
Architected and led a full application rewrite from Angular to React for a unified communications platform, designing the component architecture and WebRTC integration.
Senior Software Engineer
Software Engineer
Yashi
Pitched and built an API-first architecture to consolidate two platforms under a 90-day deadline, then designed role-based access control and unified authentication from scratch.
Full history on LinkedIn.
// projects
whoami.tsilenz.io
In ProgressAn SSH server that identifies visitors by their public keys against GitHub. Connect and see what it knows about you.
trace
ActiveThe analytics behind this site. First-party cookie tracking, GeoIP enrichment, engagement timelines, and a live dashboard that is public to browse with identifying fields masked.
diorama
ActiveTUI tool for previewing terminal color themes with realistic scenarios. See how your colors actually look before committing.
rune-keychain
On HoldA keychain utility built in Rust. Secure credential storage with a clean CLI interface.
homelab
ActiveSingle-node Proxmox homelab managed through Terraform and pyinfra. The disposable-rootfs pattern was validated by a live destroy-and-rebuild, with stateful workloads surviving untouched on ZFS.
dotfiles
ActiveBundle-based macOS bootstrap with hierarchical encrypted secrets. Age/SOPS keys unlock via Touch ID through macOS Keychain, and the system is rebuildable from a single memorable password.
tsilenz.io
ActiveThe site you are on. Static-first with a dark/light theme, blog infrastructure, and an embedded analytics beacon that talks to trace.
tokify
ActiveCross-platform token counter for GPT models. Counts tokens per-file and across entire directories.
// skills
Languages
Infrastructure & Cloud
Data & Messaging
Frameworks & APIs
// writing
Posts coming soon. In the meantime, check out my projects.