Full-stack developer with a focus on backend, integrations and security
I'm studying Systems Engineering at the University of Pamplona, Colombia. Since August 2026 I've been developing and deploying web systems for two Colombian companies: a résumé reader with OCR, a fuel-control system migrated from Flask to Node, and a course platform with a payment gateway. I'm available from January 2027 for an internship or employment.
The résumé reader for Talento Rosimar reached 73.9%1 accuracy on synthetic scans. One change to the classifier sank it to 19.6%1. It showed up because every change was measured against the same benchmark.
5/14
Classifier regression: 19.6%
Six of every nine résumés came out as an unstructured document and reached the form empty.
Six projects, some for clients and some open source. The client code is private, so for those I explain how they work and how I measured them; the open ones link to the code or a demo. The first three have case studies, including what went wrong.
2026 · React, TypeScript, pdf.js, Tesseract.js, Express, MariaDB
Client: Distribuciones Rosimar S.A.S.
An HR system that reads résumés from PDF, Word, scans and photos and fills in the forms. It runs in the browser, works offline and costs nothing per document.
Case study (Talento Rosimar)Private code
2026 · Node.js, Express, MySQL, Nunjucks
Client: Distribuciones Rosimar S.A.S.
Reads the fuel e-invoices issued under Colombia's DIAN and reconciles them with the fleet's refueling records. I migrated the backend from Flask to Node.js without changing the schema or the routes.
Case study (Control Vehicular)Private code
2026 · React, TypeScript, Vite, Tailwind
Open source, team of two
A logic circuit simulator in the browser. You write the circuit in a language of its own, it compiles as you type and draws the schematic; you can simulate it, see the truth table and export it.
Case study (CircuitBreve)Demo (CircuitBreve)Code (CircuitBreve)
2026 · Next.js 16, Laravel 12, MariaDB
Client: Lograr S.A.S.
An online course platform. My part was the Wompi payment gateway, with signature verification on every event, and private video streaming with signed links.
Private code
2026 · FastAPI, SQLAlchemy, Alembic, PostgreSQL, React 19
Team project, University of Pamplona
A system to flag students at risk of dropping out. I built the JWT authentication with refresh tokens, the role permissions and the backend migrations (30 of 84 commits9).
Backend (Early Warning System (SATIS))Frontend (Early Warning System (SATIS))
2026 · Python, NumPy, Numba, PySide6
Team of three, numerical algorithms course
A desktop app that enlarges a region of an image by solving the Poisson equation with Red-Black SOR instead of interpolating. It includes a PSNR and SSIM comparison.
NotebookLM Watermark Remover. A command-line tool that cleans PDF, PPTX and image files with inpainting. 80 stars and 24 forks12 on GitHub, with contributions from four outside developers (figures from October 2026). Code
cUPido. A social app for university students, built as a team. I wrote 115 of the 351 commits13 of the React and TypeScript frontend. Demo
AWS ETL pipeline. A layered flow (bronze, silver and gold) with AWS Glue, Step Functions and Athena over 1,067,371 sales records14. Academic project. Documentation
Eye-state classifier with CUDA. OpenMP preprocessing and CUDA training, in a team of six. My part was the CUDA backward pass and the weight export. 82.6% accuracy on 201 test samples15. Code
A résumé reader starts by pulling the text out of the PDF. Here you can see what text comes out of yours and in what order, using pdf.js, the same library the Talento Rosimar reader uses on digital PDFs.
Or try
The file is processed in your browser and is not sent to any server.
This is not a score or a verdict. It only shows the text the PDF contains and the order it delivers it in. It does no OCR, does not judge the content, and each hiring system reads in its own way.
Aug 2026 to present
Distribuciones Rosimar S.A.S. and Lograr S.A.S. · Remote
Jun 2022 to Dec 2022
SENA · Puente Nacional, Santander
2021 to present
University of Pamplona
Ninth semester. Coursework ends in December 2026.
2017 to 2018
SENA, Puente Nacional
Oracle Cloud Infrastructure Certified Architect Associate
Oct 2026, valid until Oct 2028
Oracle
DevOps on AWS and Project Management
Jun 2025
AWS, on Coursera
EF SET English Certificate, 59/100 (B2)
Jun 2025
EF Education First
Programming Bootcamp, Explorer level (159 h)
Nov 2024
MinTIC Talento Tech and Universidad Sergio Arboleda
The certificate is shared when a hiring process asks for it.
If you have an internship, a contract or a project in mind, write to me. I'll answer.
I work on Colombian time (UTC-5, no daylight saving). Pick your zone to see how much of the workday we share.
A workday of 9:00 AM to 6:00 PM is assumed in each zone, using today's clock.
Every number with a superscript can be traced. When the repository is private, I give the file and the date instead of a link.
Accuracy over time on 40 synthetic scans
rosimar1/cv-parser, docs/MEDICION_LECTOR.md, Resultado section (private) · August and September 2026
Includes the classifier regression (19.6%) and the later milestones on the same bench. The characters read (8 and 2,528) are from document CV_04, hard profile. The 20 documents with no email come from the section on the at sign.
Reader accuracy bench on digital PDFs
rosimar1/cv-parser, README and docs/MEDICION_LECTOR.md (private) · August 2026
Ten PDFs generated with jsPDF, all with a perfect text layer: this measurement does not go through OCR. It is compared against 165 fields of a versioned ground truth.
Reader measurement on scans, contracts and real photos
rosimar1/cv-parser, docs/MEDICION_LECTOR.md, sixteenth round (private) · September 30, 2026
The 89.8% on scans was measured with parallel reads that were dropped afterwards; on contracts, the serial version gave 90.0% and the parallel one 89.9%. Of the 17 real photos, only 8 are résumés.
Tests when the migration closed
rosimar1/fleet_control, commit d1cc1c2 (private) · September 23, 2026
35 calls to test() plus 14 cases generated by the permissions loop in test/integration/permissions.test.js. The commit message also says 48.
Bugs in the original fixed during the migration
commit d1cc1c2 message and test/integration/auth.test.js in rosimar1/fleet_control (private) · September 23, 2026
An open redirect on login (there is a test: next=//evil.com is ignored) and a bulk-linking route that accepted GET without a CSRF token.
Runtime dependencies of CircuitBreve
package.json of Albonire/CircuitBreve (public)
clsx, lucide-react, react, react-dom and tailwind-merge. No graph or circuit libraries.
Declared capabilities of CircuitBreve
README of Albonire/CircuitBreve (public)
Truth tables for up to 10 inputs (1,024 rows) and export to SVG, PNG at 3x and PDF.
State of the Wompi gateway
lograr-sas/lograr-plataforma, docs/ESTADO-PROYECTO.md (private)
The gateway is implemented and tested with cryptographic event verification; in production it needs the client's real credentials.
Contribution to the SATIS backend
evidence register in Albonire/my-cv, docs/GUIA.md (private)
30 of the 84 commits of ATIS-UP/AT-Backend.
SATIS permissions and attempt lockout
README and config.py of ATIS-UP/AT-Backend (public)
29 granular permissions; lockout after 5 failed attempts for 15 minutes.
Memory of RZI's dense matrix
Albonire/rzi-project, core/sor_solver.py (public)
A 256 by 256 grid has 65,536 unknowns; the dense matrix would have 65,536 by 65,536 entries of 8 bytes, about 34.4 GB (32 GiB). The solver's docstring gives the same figure.
Stars, forks and contributors of NotebookLM Watermark Remover
evidence register in Albonire/my-cv (private) · October 6, 2026
80 stars, 24 forks and 4 outside contributors.
Contribution to the cUPido frontend
evidence register in Albonire/my-cv (private)
115 of the 351 commits of cupidoUP-App/cupido-frontend.
Records processed by the ETL pipeline
README of Albonire/spark-glue-workshop (public)
1,067,371 rows processed in the silver layer.
Classifier metrics on the test set
reporte/evidencias/final_metrics.md in Albonire/clasificador-imagenes-openmp-cuda (public)
201 samples and an accuracy of 0.8259.