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Witsaba witsaba

Custom agentic systems that grow with your business.

13+ years across banks, marketplaces, and AI. Recent work: Leal (agentic AI solutions at scale), Mercado Libre (payments infrastructure), and Yuno (production-grade SDLC). Fixed-price engagements.

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What you will find below: services · track record · how we work · book a call

Proof points

[1.0]

13+

years shipping production code

11M

accounts migrated from COBOL to REST at Banco Caja Social

4mo

from idea to production

[2.0]

What we do

Agentic Systems

Voice, text, and event-driven agents that run in production — not demos. Built with Go for scalability.

Voice AI (Twilio) · Go backends (ADK, OpenRouter) · Multi-channel gateway

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Software Engineering

Production-grade software with a proper SDLC. From database architecture to cloud deployment.

SDD + TDD · Postgres + NoSQL · AWS, GCP, VPS · Software Architect

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IoT

Custom secure agents on ESP32 chips for embedded AI applications.

ESP-IDF · Custom firmware · Secure by design

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Education

Train teams on building software with AI and analyst workflows.

SDD workshops · AI onboarding · Process setup

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[3.0]

Track record

Made AI calls 4x faster

Rewrote an AI calling runtime from Python to Go. Same functionality, dramatically better performance.

11 million accounts, never went down

Migrated a core banking system from legacy code to modern APIs. All accounts transferred, zero downtime.

From idea to production in 4 months

Built an automated calling MVP with lifelike AI voices. Concept to live system, fixed price per milestone.

Your code, your data, no strings attached

Code lives in your repo. You own everything. Offboarding is a git clone — no exit fees.

Braejan Arias

[4.0]

Hi, I am Braejan

Senior AI Engineer · Casanare, Colombia · 13+ years shipping

What you will find below

I build agentic solutions for businesses that need production-grade software. 13+ years of shipping across banks, marketplaces, supply chain, and AI.

Witsaba is the company. I am the human. Fixed-price per milestone, weekly demos, code in your repo.

Every agent I build runs with human approval at the milestones where a wrong answer is expensive.

[5.0]

How we work

  1. Discovery

    30 minutes

    You understand exactly what we will build and why.

    Fixed price, no surprises.

  2. Proposal

    one week

    You have a clear blueprint and timeline.

    Milestones tied to outcomes.

  3. Build

    6 to 12 weeks

    You see working software early and often.

    Weekly demos, daily deploys.

[6.0]

Let's talk

Tell me about your problem. Personalized agentic solutions, production AI engineering, and AI integration audits for LATAM enterprises.

  • Agentic AI systems
  • Production AI engineering
  • AI integration audits
  • SDLC process setup
Book a call