Lucas Isaias Casco

cascolucasisaias@gmail.com +595 975 649211 linkedin.com/in/lucascodev lucasco.dev

Fullstack Software Engineer from Paraguay with a backend focus and 5 years of experience building systems in banking, fintech, and my own products. I design and build APIs and services with Node.js and Nest.js, integrate with existing systems, and work on authentication and critical flows with idempotency. I use AI coding agents daily, including a CLI I built to orchestrate them.

Professional Experience

Software Engineer - SODEP S.A

November 2024 - July 2026

Fintech Inversiones - Aquí Pago (Module “Mi Tienda”)

March 2026 - July 2026

Implemented a shared session module between Posweb (PHP) and Mi Tienda (Next.js), integrating with the existing middleware to enable unified access without re-login
Built a Next.js module integrated as a microfrontend into an existing PHP application
Developed stock management and payment features
Delivered the MVP on a tight deadline

Banco Basa - Banking CRM

April 2025 - February 2026

Integrated with banking APIs through a Fastify proxy server responsible for authentication and request/response encryption
Implemented idempotency keys with Redis to prevent duplicate records in critical onboarding flows
Built modules for client onboarding, account creation, and card issuance within a banking CRM
Contributed to defining the deployment pipeline across development, QA, and production environments and its interaction with frontend and backend services
Conducted code reviews focused on maintainability and team standards
Provided structured technical mentorship to team developers; two participants reached semi-senior level and one reached mid-level in under two years

Banco Interfisa - Business Banking Platform

November 2024 - April 2025

Built frontend features for high-complexity business banking flows: loan payments, transaction history, and vendor management

Freelance

June 2021 - November 2024

Integrated payment gateways (Stripe, Bancard, Pagopar) into client applications, including checkout flows and payment confirmation webhooks
Built web solutions for clients under NDAs using React, Next.js, and Node.js across different domains

Projects

NutriOne - SaaS for nutritionists (nutrione.com.py)

Co-created the product and led full backend and frontend development of the MVP
Nest.js backend with Prisma and Redis for patient management, scheduling, and nutrition planning
Optimized the nutritional plan creation process
Built with an AI-assisted workflow (Claude Code, custom agent orchestration)

Stack: Nest.js, Next.js, Prisma, Redis

Vexillum CLI - Orchestrator for AI coding agents (vx.lucasco.dev)

Go terminal CLI that coordinates multiple coding agents (Claude Code) on parallel tasks
Used to develop NutriOne's current iteration

Stack: Go, JSON file storage, Claude Code

Creacionix AI - AI content generation app (creacionixai.lucasco.dev)

Text generation platform with 25+ templates powered by the Google Gemini API
Designed, built, and deployed solo; open source on GitHub

Stack: Next.js, Clerk, Neon, Drizzle ORM

Education

Universidad Católica

Computer Engineering

Colegio Nacional “Prof.: Luciano Bordón”

Technical Degree in IT

Tech Stack

Languages: JavaScript, TypeScript, Java, Dart, Go
Backend: Nest.js, Node.js, Express, Fastify, Spring Boot
Frontend: React, Next.js, Flutter
Data & Infrastructure: PostgreSQL, Prisma, Redis, Docker, Docker Compose, CI/CD
Tools: Git, GitHub
AI & Integrations: Claude Code, Google Gemini API, AI agent orchestration, Stripe, Bancard, Pagopar, Firebase

Languages

Spanish: Native
English: Intermediate

References

References upon request