Software Engineer — AI Agents / RAG

§01 — INTRO_SEQUENCE

Jacobo Cohello Revolledo

Software Engineer

Peru · Open to remoteEnglish C2

Full Stack · Backend · Automation & AI

I build and operate production systems: integrations across communication channels, workflow automation, multi-tenant architectures and LLM-powered pipelines. I work with AI as a daily tool — Claude Code, Cursor and Claude models for development and process automation.

Get in touch Download CV See my work

§02 — SELECTED_WORK

Self-hosted AI coding agent

Mention it in Slack → it works in an isolated git worktree → opens a PR for review. Validated end-to-end on a real project.

Slack → PR

fully autonomous feature pipeline

OpenHandsKimi K3Slack APIDocker

slack.com / #dev-agents

@agent add Dixon-Coles model to the prediction pipeline

PR #42 — feat: Dixon-Coles model

Multi-tenant RAG with an eval harness

Hybrid keyword + vector search in one Postgres database, tenant isolation enforced by Row Level Security, and retrieval quality gated in CI.

RLS

tenant isolation enforced by the database, not app code

PostgreSQLpgvectorRow Level SecurityOpenAI

ci / retrieval-evalpass

SET app.tenant_id = 'acme'

golden set · recall@5 ≥ threshold

Usage ledger for AI features

A double-entry ledger that reserves credits before an AI call and settles the real cost after it — safe under retries and concurrency.

Reserve → settle

two-phase charging, no overdraft

Node.jsTypeScriptPostgreSQLRedis

ledger / acct_demo

reserve · available → reserved · 40 cr

settle · reserved → spent · 27 cr +13 released

Call intelligence pipeline

Recorded calls become searchable transcripts and structured notes — topic, objections, next step — through an async, replayable pipeline.

Audio → JSON

structured notes extracted from every call

TwilioWhisperOpenAIBullMQ

calls / synthetic-014

intent: reschedule · sentiment: neutral

next_step: "send new slot by email"

§03 — MORE_SHIPPED_SYSTEMS

Breadth beyond the case studies — systems used daily by multiple teams.

Client onboarding automation

n8n workflow: WhatsApp group + Drive folder + invites + welcome message — 7 manual steps reduced to 1 click, human error eliminated.

n8n · WhatsApp API · Google Drive API

TikTok Business Messaging integration

Built and tested the TikTok Messaging API integration for the multi-tenant SaaS platform — centralized message management across clients.

TikTok API · Node.js · Multi-tenant

Centralized team inbox

Multiple team email accounts in one view: role-based access, real-time WebSocket alerts, transactional email via SMTP inside automated flows.

WebSockets · SMTP · IMAP · React

Internal management systems

Payments, quotes and incidents systems used daily by multiple teams across the agency.

Node.js · PostgreSQL · React

Multi-tenant data architecture

PostgreSQL + Redis design isolating data between clients across the whole platform.

PostgreSQL · Redis · Multi-tenant

Cloud infrastructure operations

Servers and services across DigitalOcean, GCP, AWS and Contabo; DNS and security via Cloudflare.

DigitalOcean · GCP · AWS · Cloudflare · Linux

* Interface recreated with synthetic data — the production system holds client-confidential data.

§04 — MORE_SYSTEMS

Backend

Node.js

TypeScript

Express

FastAPI

Frontend

React

Next.js

Tailwind CSS

Redux

Databases

PostgreSQL (multi-tenant)

MySQL

MongoDB

Redis

Cloud / Infra

Linux

DigitalOcean

GCP

AWS

Messaging

WhatsApp Business (Evolution API, Baileys)

TikTok Messaging API

Twilio

SMTP

AI / LLMs

OpenAI API

LangChain

LangGraph

Qdrant

Automation

n8n

Bull/BullMQ

Webhooks

API integrations (JSON/XML)

Tools

Git / GitHub

Postman

Claude Code

Cursor

Experience

Software Engineer — Full Stack & Automation

Monstruo Creativo · Jul 2024 — Present

Back-end Developer (Internship)

Educa Ágil Consultores · May 2023 — Jul 2023