Diego Francisco Granda Zhingre

• 

  textrack

  Manufacturing execution system for garment plants

  Tracks every garment from production order to bundle with HMAC-signed QR tickets, an offline-first Android scanner, piece-rate pay that follows Ecuador's Labor Code and live OEE per ISO 22400-2.

  • Java 25
  • Spring Boot 4
  • Angular 22
  • Kotlin
  • Jetpack Compose
  • PostgreSQL

  Code: textrack

• 

  facturador-sri

  Point of sale with Ecuadorian e-invoicing

  Issues invoices and credit notes under the SRI offline scheme: 49-digit access key with a mod-11 check digit, XSD-validated XML, XAdES-BES signature, submission, authorization and a PDF RIDE. 94 tests against a WireMock-simulated SRI.

  • Java
  • Spring Boot 4
  • Angular 22
  • PostgreSQL
  • WireMock
  • Testcontainers

  Code: facturador-sri

• 

  vuln-manager

  SBOM-driven vulnerability prioritization

  Ingests CycloneDX SBOMs, matches each component against OSV.dev and enriches it with CISA KEV, SSVC, EPSS and NVD. Prioritizes with an explainable decision table, computes BOD 26-04 deadlines and records justified VEX statements.

  • C#
  • .NET 10
  • Blazor
  • EF Core
  • PostgreSQL

  Code: vuln-manager

• 

  vision-defectos-tela

  Computer vision for textile quality control

  Detects and localizes fabric defects with PatchCore and turns them into the decisions the industry uses: the ASTM D5430 four-point system per roll and ISO 2859-1 AQL per lot. Reproducible training, an ONNX Runtime API, MLflow and drift monitoring.

  • Python
  • PyTorch
  • ONNX Runtime
  • FastAPI
  • Streamlit
  • MLflow

  Code: vision-defectos-tela

• 

  PEUC

  Admission exam prep app for the University of Cuenca

  All 2,737 questions from the official 2026 bank with verified answers, explanations and mock exams scored like the real test. Works offline on Android, iPhone and the web.

  • Flutter
  • Dart
  • SQLite
  • Python

  Code: PEUCLive demo: PEUC

• 

  nlp-tickets-es

  Spanish support ticket classification

  Predicts intent, category, urgency and sentiment, suggests the target team and asks for human review when the model is unsure. Masks national IDs, tax IDs, phone numbers and names before storage and finds similar cases with pgvector.

  • Python
  • FastAPI
  • ONNX Runtime
  • PostgreSQL
  • pgvector
  • Streamlit

  Code: nlp-tickets-es

• 

  crm-ventas

  B2B CRM built for data protection compliance

  Kanban pipeline, PDF quotes with Ecuadorian VAT and sales forecasting, plus consent records, data-subject rights and an immutable access log for personal data.

  • Java 25
  • Spring Boot 4
  • Angular 22
  • PostgreSQL

  Code: crm-ventas

• 

  contabilidad-api

  Double-entry accounting engine

  Chart of accounts from Ecuador's companies regulator, journal entries rejected unless they balance, real period closing and IFRS for SMEs financial statements in Excel and PDF. Property-based tests with jqwik.

  • Java 25
  • Spring Boot 4
  • PostgreSQL
  • jqwik
  • Testcontainers

  Code: contabilidad-api

• 

  nomina-ec

  Ecuadorian payroll 2026

  Social security, 13th and 14th salaries, reserve funds, vacations and income tax with date-versioned legal parameters: a new minimum wage is a new record, not a redeploy, and every change is audited.

  • Java 21
  • Spring Boot
  • Angular 22
  • PostgreSQL

  Code: nomina-ec

• 

  inventario-multibodega

  Multi-warehouse WMS with a valued stock ledger

  Weighted-average costing (IAS 2), FEFO lot picking, atomic transfers between warehouses, cycle counts approved by a different person and GS1/QR scanning. 89 tests with 85% coverage.

  • Java 25
  • Spring Boot 4
  • PostgreSQL
  • Testcontainers

  Code: inventario-multibodega

Other projects

• HuellitasInteligentesCapstone project: IoT pet-care platform with a mobile app, a web app and ESP32 devices.Spring Boot · Angular · Flutter · ESP32 · PostgreSQL
• athletesosPersonal learning app: calisthenics, martial arts, chess, vocabulary and trivia.Flutter · Spring Boot · PostgreSQL
• sistema-matricula-backendStudent enrollment REST API.Spring Boot · JPA · MySQL
• ProyectoNubeTask manager with an OpenAPI-documented REST API.Spring Boot · MongoDB · React
• ServicioWEBSoapTaxiPublishing and consuming SOAP web services with a WSDL contract.Java · SOAP · WSDL

1. Dec 2025 – Feb 2026

   Software development intern

   RENAFIPSE · Ecuador's National Network of Popular and Solidarity Finance

   • Pre-professional internship in databases.
   • Java application development with NetBeans.

2. 2026

   Capstone project · Huellitas Inteligentes

   Instituto Superior Tecnológico del Azuay

   • IoT pet-care platform: Spring Boot backend, Angular web app, Flutter mobile app and ESP32 firmware.
   • Deployed to production, with the Android app distributed from the project's own server.

3. Education

   Higher Technologist in Software Development

   Instituto Superior Tecnológico del Azuay · Cuenca · completed in 2026