Senior engineering judgment, directly connected to the build._
bc9 is David Beltran’s principal-led engineering practice. It exists for work where architecture, product judgment, and implementation cannot be separated without losing the thread.
One accountable technical lead.
// the practice
David works across production software, applied AI, local-first developer infrastructure, and technical strategy. He created the public systems featured throughout this site: Hayvenhurst, Guignet, Sirius Forester, Ametrite, and Catryna Wikinelli.
Clients engage bc9 when a prototype needs production discipline, an architecture has become fragile, or an AI workflow needs evidence instead of optimism. David remains directly involved from the first technical conversation through delivery.
US market-entry and fractional-CTO engagements remain available through principal advisory. Process automation, modernization, and off-SaaS work are handled separately through Garnet Guidance, keeping bc9 focused on complex engineering.
The work is inspectable.
// built in publicThe public projects are not a logo wall. They expose the architecture, tradeoffs, release process, benchmarks, and limits behind the work.
Bring the real problem.
The first conversation is a technical one. Explain what is stuck, what has to ship, and what failure would cost.