Available for new work

Bryan Romero Chinchilla

Software Engineer — Backend & integrations, from the plant floor to the cloud.

I build the APIs, integrations, and systems behind operational software. I started in manufacturing — owning a plant-wide system end-to-end as the sole developer — and have since spent my time at the seam between machines and the cloud: production lines over OPC UA and MQTT, legacy systems over SOAP, high-availability services kept healthy, and the manual work in between automated away.

years building

San José

Costa Rica

B2+

English

Get in touch See my work ↓

Selected works

12 projects

Featured · AI agent on WhatsApp · multi-tenant SaaS

Tucán Digital

2026

Contract developer · Kama

A school assistant that lives in WhatsApp. Teachers publish homework by sending a normal message or a voice note, parents get notified and can ask about their kids, and the school sees it all in a web panel. An LLM agent decides which tools to call; the code only implements the tools it is allowed to use. Multi-tenant from the first line: every school shares one number and one backend, with data isolated per school.

Tool-use agent loop on Amazon Bedrock (Claude Haiku, Mistral as fallback)
Voice notes transcribed to tasks; assignment PDFs stored on Cloudflare R2
Hand-built React 19 panel with per-school metrics and roles
In production on Render (Postgres 16, nightly backups), 1,200+ automated tests in CI

Python
FastAPI
PostgreSQL
Amazon Bedrock
WhatsApp Cloud API
React
Render

tucandigitalcr.com

Crossroads Bridge

2026

Freelance · Crossroads Method blues school

The school had a practice-diary app built in Lovable and a student campus on WordPress + LearnDash. I built the bridge: a WordPress plugin in PHP that signs students from the campus into the app, saves their practice sessions in the WordPress database, and renders the dashboard metrics — hours, sessions, streaks — with PHP shortcodes.

PHP
WordPress
LearnDash
MySQL
React
TanStack Start
Lovable

crossroadsmethod.com

Interactive Proposal Decks

2026

For my clients and Tucán Digital

Instead of a PDF, each client gets an interactive deck: one self-contained HTML file, generated by a Python build script, with phone mockups of the real WhatsApp flows and websites they can tap through. It works offline on any phone or laptop.

Python
HTML / CSS
JavaScript
Playwright

Caseta Inteligente

2025–26

Personal project · client STM Computadores

Counts vehicles entering and leaving a campus checkpoint, reads the plate via OCR, and logs entry/exit times — replacing a handwritten guard logbook.

Python
YOLO / Ultralytics
OpenCV
easyocr
Flask
SQLAlchemy

Industrial IoT · edge-to-cloud messaging

SCADA Irrigation Telemetry

2021–22

Cecropia Solutions · US cannabis-growing client

The messaging and monitoring layer around a SCADA irrigation system with sensors and actuators. I built the MQTT broker from scratch to replace a costly AWS IoT Core deployment, captured the system’s temperature, pressure and irrigation tags, and put observability on top of them.

MQTT
Mosquitto
SCADA
Prometheus
Grafana
Docker

Microsoft 365 / Power Platform

M365 Time-Tracking Solution

2026

Freelance · STM Computadores

A managed Power Platform solution for a technician team: a Power Apps canvas app over SharePoint lists, orchestrated by Power Automate, with an AI Builder prompt that cleans up work notes, plus a Python connector to Microsoft Graph.

Power Apps
Power Automate
SharePoint
AI Builder
MS Graph

ASADA Santa Elena

2023–24

Freelance · via SANDS agency

An end-to-end portal where residents look up and pay their water bills. Integrates a legacy SOAP system for account data and the Evertec payment gateway through webhooks for payment events.

Node.js
Express
SOAP
Evertec
Nginx

aguapuracr.com

WeArtPlay

2022

Freelance

A graphic and performance revamp of the WeArtPlay music academy website — refactoring and optimizing the WordPress build.

WordPress
PHP
JavaScript

artplay.academy

Websites for local businesses

Static, fast sites for local businesses, built so every visit can end in a WhatsApp conversation. No server, no cookies, structured data for Google, and share images for social links.

4 live sites

Vidrios Glass

Glass, aluminum & remodeling

Service catalog with filters, a job gallery with a swipeable viewer, and a quote form that pre-writes the WhatsApp message.

Visit site

Panes Mondrew & Maddi

Artisan bakery

Searchable menu and a cart that sends the full order — pickup or delivery, with the total — to the bakery over WhatsApp.

Visit site

Mariscos Elizabeth

Seafood distributor

Mobile-first catalog by category for homes and restaurants, with a quote request flow.

Visit site

STM Computadores

IT services company

Corporate landing for business IT solutions, with direct contact to the sales lead.

Visit site

Experience across

Experience

7 roles

2025 – 2026

Heredia, Costa Rica

Maintained and integrated the microservices behind a multi-carrier package-tracking platform.

Maintained and integrated Python microservices (FastAPI) for a multi-carrier (UPS/DHL/FedEx) tracking platform on Azure AKS, backed by Cosmos DB.
Led incident triage and diagnosed message-processing failures with KQL log analytics against Azure Service Bus.
Built monitoring and a reprocessing pipeline that cut stuck records from ~30–40% to ~10–15%.

Python
FastAPI
Azure
Cosmos DB
KQL

2024 – 2025

Belén, Heredia, Costa Rica

Kept plant-critical enterprise apps and legacy databases healthy and fast.

Developed, maintained, and optimized plant-critical enterprise apps and internal APIs (Python, C#/.NET, Node.js).
Maintained a legacy Oracle system writing stored procedures and views in PL/SQL, plus T-SQL on SQL Server.
Rebuilt a KPI report from a ~2-hour query to a few seconds with a Redis caching layer.
Integrated a production machine with Python over OPC UA and MQTT — reading and writing PLC control tags coordinated with the machine vendor’s mechatronics engineer — and built the web interface operators used inside that station’s work cycle.
Built Power BI and Tableau dashboards for supervisors.

C#/.NET
SQL Server
Oracle · PL/SQL
OPC UA
MQTT
Redis

2023 – 2024

Costa Rica

Built and supported a self-service billing portal end-to-end.

Built, deployed, and supported a self-service billing portal (Node.js/Express) end-to-end.
Integrated a legacy SOAP system and the Evertec payment gateway via webhooks.
Deployed on DigitalOcean behind Nginx, with CI/CD via GitHub Actions.

Node.js
Express
SOAP
Evertec
Nginx
GitHub Actions

2022 – 2023

Outsourced · Costa Rica

Automated lab setup and tooling for a team of technicians across Windows and Linux.

Built a cross-platform Python/PyQt installer wizard that cut lab setup time ~87% (1–2 h to 15–20 min) for 20–30 technicians.
Supported technician teams by installing and configuring software across servers, NUCs, and lab hardware.
Automated tooling deployment (Python, Bash, PowerShell) on RHEL and Windows Server.

Python
PyQt
Bash
PowerShell
RHEL

2021 – 2022

Costa Rica

Built CI/CD, data pipelines, and the messaging layer for a SCADA system.

Built CI/CD pipelines from scratch (Jenkins, SonarQube) for Flask and C#/.NET projects; wrote tests with pytest.
Built a PySpark pipeline on Azure Databricks merging multiple Salesforce sources into a unified dataset.
Built an MQTT broker (Mosquitto) from scratch for a SCADA irrigation system with sensors and actuators, capturing its temperature, pressure and irrigation tags — replacing a costly AWS IoT Core deployment — and the Prometheus/Grafana monitoring on top of it.

MQTT · Mosquitto
SCADA
Prometheus
Grafana
Jenkins
PySpark
Docker

2019 – 2021

Belén, Heredia, Costa Rica

Sole developer of a plant-wide manufacturing execution system, from scratch.

As the sole developer, ran the full SDLC to build a Go-based plant-wide system, meeting FDA/Quality traceability.
Digitized paper processes across roughly 18 production lines.
Built Python/Flask microservices and REST APIs for operational reporting.
Collaborated on the logic layer of two OPC server/gateway devices that captured production-line tags and fed them into an Azure Data Lake consumed by a statistics team abroad.
Built real-time KPI dashboards (Power BI, Chart.js, D3.js) for OEE and giveaway.

Go
Python
Flask
OPC UA
Azure Data Lake
D3.js

2015 – 2016

Heredia, Costa Rica

First role out of technical high school — hardware, cameras, and cabling on site.

Maintained and configured computer equipment on client sites and in-shop.
Installed security cameras (PTZ/DVR) and mapped networks with structured cabling.

Hardware
Networking
PTZ/DVR

About

I’m a software engineer with 6+ years building and integrating the systems operations run on. My path started on the plant floor at Unilever, where I was the sole developer of a plant-wide MES, and moved through manufacturing IT, industrial IoT, courier-tracking platforms, and enterprise integrations.

A lot of that work sits at the seam between machines and software — OPC UA, MQTT and PLC tags on one side, REST APIs and cloud services on the other. I like getting to the root cause of a problem and then automating it away, whether that’s a script, a monitoring dashboard, or a small AI helper.

Day to day I ship with Claude Code as my primary development tool — project context files, MCP servers, the whole workflow — and I’m currently learning LangChain and RAG. Recent work has meant LLM agents on WhatsApp, WordPress/PHP integrations, websites for local businesses, Microsoft 365 automation and applied computer vision, alongside the backend and DevOps base that’s always been there.

Education

Tecnológico de Costa Rica
Computer Science Engineering — advanced coursework (incomplete)
2017 – 2020
CTP Mercedes Norte
Technical — Business Informatics
2013 – 2015

Certifications

Intro to Machine LearningKaggle
NASA Space Apps Challenge2017
Hackathon 2019 — Public FinanceIMF

Capabilities

Languages

Python
Go
C# / .NET
Node.js
TypeScript
JavaScript
SQL

Backend & APIs

FastAPI
Flask
Express
REST
SOAP
webhooks
microservices
PL/SQL · T-SQL

IoT & industrial protocols

MQTT · Mosquitto
OPC UA
SCADA integration
PLC tag read/write
OPC server/gateway
edge-to-cloud telemetry
UDP
Prometheus
Grafana

Cloud & DevOps

Azure (AKS, DevOps, Service Bus, Cosmos DB)
DigitalOcean
Docker
CI/CD
Nginx
Linux / RHEL
Git

Data & ML

PySpark
Databricks
Azure Data Lake
Power BI
Tableau
scikit-learn
YOLO
OpenCV

AI-assisted development

Claude Code (daily driver)
LLM agents · tool use
Amazon Bedrock
MCP servers
CLAUDE.md project context
AI Builder (custom GPT prompt)
learning: LangChain · RAG

Frontend

React
Next.js
HTML / CSS
Tailwind
Chart.js
D3.js

Web & CMS

WordPress
PHP
LearnDash
WhatsApp Cloud API
Netlify
Cloudflare

Databases

SQL Server
Oracle
PostgreSQL
Cosmos DB
Redis

Available for new work

Let’s build your next project.

Backend, integrations, automation, or a full product from scratch — if it needs to run reliably, I’d like to hear about it. Grab a time on the right, or reach out.

Email me LinkedIn GitHub WhatsApp Résumé (PDF)