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Israel Portilla

@israelportilla

Full-Stack Software Engineer at Produbanco modernizing legacy WCF services into microservices and BFF layers for banking.

Ecuador

Message

At Produbanco - Grupo Promerica, I deliver full-stack solutions across Savings & Investments, Mobile Banking, and banking modernization initiatives. I implemented dynamic interest-rate simulations for Flexiahorro and contribute to migrating legacy WCF services into microservices and BFF layers.

I also contribute to Mobile Banking development with Kotlin Multiplatform, supporting cross-platform functionality, production stabilization, and feature delivery. I collaborated on card tokenization initiatives for digital wallet integration.

Earlier at Produbanco - Grupo Promerica, I contributed to modernizing a Windows Forms application into a web-based banking solution using Angular and .NET. In freelance project-based collaborations, I developed financial administration and hotel reservation applications using Node.js/NestJS, Laravel, and React.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Software Engineer

Current

Produbanco - Grupo Promerica

Jan 2025 - Present (1 year 9 months)

Delivering full-stack solutions for banking modernization, including dynamic frontend flows, mobile banking with Kotlin Multiplatform, and card tokenization. Migrating legacy WCF services to microservices and BFF layers.

Angular React .NET Spring Boot NodeJS NestJS Python fastAPI Kotlin Multiplatform SQL Server PostgreSQL Redis MongoDB CI CD Microservices BFF Card tokenization

Application Support Analyst

NTT DATA – Banco Pichincha

Dec 2024 - Jan 2025 (1 month)

Provided production support for critical banking systems, analyzing incidents and performing root cause analysis. Produced technical incident reports and coordinated with Banred for interbank integrations.

SQL Backend Log Investigation Stack Traces Incident Management Root Cause Analysis Banking Systems Banred

Full-Stack Developer

Freelance Project Based Collaboration

Jan 2022 - Dec 2024 (2 years 11 months)

Collaborated with independent developers to build financial administration and hotel reservation systems. Developed backend services with Node.js/NestJS and Laravel, and frontend interfaces with React.

NodeJS NestJS Laravel React REST APIs Role Based Access Control SQL MongoDB

Full-Stack Web Developer

Produbanco - Grupo Promerica

Jun 2024 - Dec 2024 (6 months)

Modernized a legacy Windows Forms application into a web-based banking solution using Angular and .NET. Developed backend APIs for campaigns and notifications, and implemented analytics with Dynatrace.

Angular .NET PrimeNG Dynatrace Clean Architecture Microfrontends REST APIs SQL Server

IT Assistant – Pre-Professional Internship

Municipality of Cayambe (GADIP)

Sep 2023 - Dec 2023 (3 months)

Provided technical support to internal users, resolving software and hardware incidents. Assisted in infrastructure setup and system installations, and contributed to documentation.

Technical Support Hardware Diagnostics System Installation Documentation IT Procedures