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About me

Full Stack Software Engineer · Next.js · NestJS · PostgreSQL

Full Stack Software Engineer with 4+ years shipping production software for international clients. I work with Next.js, React, NestJS, Node.js, and PostgreSQL — from architecture design through cloud deployment.

Platforms built: AI fraud-detection console for insurance (ShieldMind), multi-tenant billing and inventory SaaS (Vellum), multi-role dental clinic platform with AI assistant (Clínica CV Dental), health copilot (WellWay), and corporate sites in continuous production since 2022 (Joarte SL, Spain).

Experience highlights

  • 4+ years production software · international remote delivery
  • ShieldMind AI — fraud console (Gmail, RAG, scoring)
  • Vellum — multi-tenant SaaS: billing, POS & inventory
  • Clínica CV Dental — multi-role platform with AI assistant
  • Spain client — ongoing engagement since 2022

Technical focus

  • Maintainable architecture and APIs
  • Complex interfaces and multi-role flows
  • Cloud deployment and production systems

Core stack

Focus: Full Stack Software Engineer
Next.js
React
NestJS
Node.js
PostgreSQL
TypeScript
View projectsContact

Skills

Technologies by category

  • Advanced — core stack, production-ready
  • Intermediate — solid experience
  • Basic — working knowledge

Languages

JavaScriptTypeScriptPythonSQLJavaHTML5CSS3

Frontend

ReactNext.jsAngularReact NativeTailwind CSSMaterial UI

Backend

Node.jsNestJSExpressREST APIsGraphQLSwagger/OpenAPI

Databases

PostgreSQLMongoDBMySQLPrisma

Authentication / Identity

JWTAzure Active Directory

Infra & tools

GitDockerCI/CDVercelAWSAzure

Projects

Production systems — insurance, health, billing & enterprise web

1 / 6
Web platform

Vellum - Billing System

Multi-tenant business operations SaaS: e-invoicing, POS, inventory, cash register, cost breakdown, real-time analytics, and AI advisor — retail, restaurants, clinics, and services (includes Ecuador SRI compliance).

Production multi-tenant SaaSNestJS + PostgreSQL + Azure ADAI business advisor (Velli)
ReactNext.jsTypeScriptTailwind CSSNode.jsNestJSPostgreSQLJWTAzure AD

Problem

SMBs run billing, sales, and inventory in separate tools. That causes errors, slows collections, and blocks real-time business decisions.

Role

Full Stack: multi-tenant architecture, NestJS APIs, SRI/XAdES-BES integration, Next.js frontend, JWT + Azure AD auth, PostgreSQL, and cloud deployment.

Features

  • SRI 2026 billing · XAdES-BES signing
  • POS, cash register and real-time inventory
  • Restaurants, clinics, pharmacies and retail
  • Cost breakdown and margin control
  • Reports and executive dashboard
  • AI business advisor (Velli)

Modules

DashboardSRI InvoicesPOS / CashProductsInventoryCost breakdownReportsAI Advisor

Step-by-step tour

7-step tour: start free, understand the platform, explore industry use cases, and see real product screenshots.

Step 1 of 7·Start free

Sign up at vellumec.com (30 days, no card), set up your company and SRI certificate, and access the main panel.

How to try the demo

Go to vellumec.com/auth/login → «Get started free» or «Sign in». 30-day trial, no card required. Set up your company, SRI .p12 certificate, and start invoicing.

Step 1 of 7

Stack: Next.js + NestJS · PostgreSQL · JWT and Azure AD · XAdES-BES signing · Cloud deployment

Experience

Software Engineer · Independent Contractor

Feb 2022 – Present · 4+ years

Joarte Construcciones (Spain)

Ongoing remote engagement with a construction company in Spain — sole engineer owning the corporate web platform in production. • Designed and built joarte-construccion.vercel.app: multilingual site, lead capture, premium brand — live 4+ years • End-to-end ownership: UI/UX, Next.js/React, technical SEO, Vercel deployment, and evolutionary maintenance • Business feature integration, performance optimization, and remote technical support • Demonstrates reliability with international clients, async communication, and sustained delivery from the US • Official certificate of professional services issued by the company (verifiable document).

View company View certificate

Software Engineer

May 2024 – Jun 2024 · 2 months

Pontifical Catholic University of Ecuador (PUCE) · Manabí Campus

Software engineering internship (80 hours) with the IT and Systems Coordination office. • Redesigned university intranet access on Office 365 • Built online phone directory integrated with PBX trunk • Front-end design and web development under academic supervision

View full document

Education

PC

Pontifical Catholic University of Ecuador (PUCE) - Manabí Campus

2022 – Jun 2026

B.Sc. Software Engineering

University

Visit website· pucem.edu.ec
ST

SOWELA Technical Community College

Lake Charles, Louisiana, USA

High School Diploma Equivalency

U.S. high school equivalency

UE

Unidad Educativa Cruz del Norte

Ecuador

General High School Diploma

Secondary education

Languages

Levels and certificates

SpanishNative · bilingual

Native — no certificate required

EnglishProfessional · US-based

Pearson Benchmark Test B1+ (Feb 2026)

Signed certificate
Benchmark Test B1+

Licenses and certifications

Cloud Computing

Google

Issued Feb. 2025 · Expires Feb. 2035

View credential

Mobile App Development Course

Google

Issued Feb. 2025 · Expires Feb. 2035

View credential

Data Analytics Essentials

Cisco Networking Academy

Issued Feb. 2025 · Expires Dec. 2035

View full document

Google: Artificial Intelligence and Productivity

Santander Open Academy

Issued Feb. 2025 · Expires Nov. 2035

Credential ID: OA-2025-0225000838846

View credential View full document

CCNAv7: Introduction to Networks

Cisco Networking Academy

Issued May 2024 · Expires Dec. 2035

View full document

Contact

Available for remote full-time and contract roles.

Direct channels

Based in the US · reply within 24 hours.

luxtar9@gmail.com LinkedIn GitHub Download CV