Full-stack product engineer building workflow-heavy software where correctness, state management, authorization, and user trust matter.
Founder / engineer behind Day One Devs.
I focus on systems where a plausible answer is not enough:
- AI-assisted workflows with deterministic safety boundaries
- Document review and automation with explicit approval gates
- Multi-step business workflows, approvals, and audit history
- SaaS foundations: identity, billing, webhooks, storage, and API design
- Migration and stabilization work for evolving product codebases
- DevSite - Day One Devs portfolio and client-intake application - dayonedevs.com
- Document Workflow Showcase - public-safe TypeScript demo of deterministic review stages, approval gates, and audit events
- Letter Generator Showcase - fictional-data prototype for validated intake, template assembly, disclaimers, and human-review boundaries
- Home Service Demos - modular local-service website demos - live demo
- Day One Agent Kit - portable engineering standards, audit workflows, CI guidance, and delivery handoff templates
Public repositories are intentionally sanitized. They demonstrate engineering patterns and runnable code without exposing private customer data, production credentials, or client-specific implementation.
- Website / intake: dayonedevs.com
- GitHub: @JahacksV1