Independent software developer

I build and maintain backend services, deployment pipelines and internal tooling for small teams.

About

Working solo since 2019, mostly on long-running maintenance contracts rather than one-off projects. I prefer boring, predictable systems: plain SQL over clever ORMs, single binaries over sprawling clusters, and monitoring that actually gets read.

Currently taking on a limited number of engagements. If something below sounds close to what you need, get in touch.

Stack

Selected work

Order processing rewrite

Replaced a batch cron pipeline with an event-driven queue for a regional logistics operator. Processing latency dropped from hours to under a minute.

Go · PostgreSQL · NATS

Reporting backend

Aggregation layer and scheduled export service for an accounting SaaS. Handles roughly four million rows per nightly run on a single node.

Python · ClickHouse · Airflow

Infrastructure migration

Moved a legacy PHP application off shared hosting onto dedicated servers with automated provisioning, backups and restore drills.

Ansible · Docker · Restic

Contact

hello@developer9.site

Response time is usually a day or two. Please include a short description of the system and what currently hurts.