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Development portfolio

Fabián
Mancilla

Full-stack development

Complete SaaS products, from the business problem to deploy: accelerated by AI, with an engineer's discipline. 12 years in IT and business processes tell me what to build; AI lets me build it fast.

Panel
Sprintbot panel: project management board with Burndown, Anti-Patterns, and Activity Center widgets.
fig. 01 · Sprintbot · Panel2025Live

Work

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Sprintbot panel: project management board with Burndown, Anti-Patterns, and Activity Center widgets.
fig. 02 · Sprintbot · detail — Burndowncrop of fig. 01

Live

Sprintbot

An assistant with real permissions over multi‑tenant data: the hard part is containing what it can do when it's wrong.

  • 41tools with RBAC + Zod
  • 50K toktoken ceiling per conversation

Jul 2025 → Jun 2026 · from prototype to production

Read the case

Sprint behind: 8 of 9 tasks pending · 11% progress.

How I work

AI makes me faster. The judgment is mine.

I own the architecture, review every change, and stand behind what ships. I spec before I prompt and test before I merge.

  1. Specify

    The agent's threat model was written into the very commit that closed the workspace finding.

    See it in the case
  2. Build

    A registry of 41 tools with schema validation (Zod) and role-based permissions (RBAC) before touching data.

    See it in the case
  3. Answer

    A self-audit with per-finding traceability: what was fixed, what was deferred, and its migration plan.

    See it in the case