About
I’m a Senior Full-Stack Software Engineer. I develop and maintain production systems for financial services, education, and commerce, combining technical design, implementation, and operations.
My work spans web and mobile applications, backend services, financial systems, application security, legacy integrations, and platform engineering. I’m particularly interested in where software architecture, infrastructure, and production operations intersect.
I’m also building Wize It, my software and automation initiative for businesses. Through it, I combine my experience in development, infrastructure, and operations to address concrete needs. Agents focuses on customer inquiries across digital channels; WES coordinates engineering work with AI agents and human review.
You can call me Nacho. I’ve always been curious about how systems work: I started by building computers and solving technical problems, and that curiosity evolved into designing and operating complete software systems.
Work Experience
Eldar · Newpay / Fiserv
Full Stack Software Engineer
Apr. 2023 — Present
- Defined the frontend technology stack and developed a React/Next.js and TypeScript application used by financial institutions for ATM operations, debit card management, and operational monitoring, replacing a legacy PHP system.
- Designed, developed, and documented a production Android/iOS token application using React Native, Expo, and TypeScript, with offline TOTP generation via a security SDK, secure credential storage, and token lifecycle management.
- Modernized five Java APIs to remediate vulnerabilities, including critical findings, by upgrading unsupported Spring versions, dependencies, and application code while preserving existing service behavior.
- Delivered two Java APIs to production for financial services: transaction notifications through dedicated AWS SQS queues per bank with access controls and query limits; and bank account–debit card linking through transactions validated against core services.
- Remediated vulnerabilities across four Java APIs using Sonatype, Fortify SCA, and WebInspect, including dependency analysis, finding review, and application code changes.
- Maintained and enhanced Java/Spring applications integrated with mainframe systems, diagnosing incidents through Linux log analysis and resolving issues across APIs and integration flows.
- Mapped and documented end-to-end data flows between Java APIs and previously undocumented mainframe systems, creating an architecture and integration reference for maintenance and troubleshooting.
Start University
Software Engineer · Contract
Mar. 2023 — Feb. 2024
- Developed, maintained, and troubleshot C# web applications from .NET Framework 4.7 to .NET 6, with Entity Framework and SQL Server, resolving frontend, backend, and integration issues across production systems.
- Designed and developed a real-time Botmaker–CRM integration to synchronize conversations and lead data for commercial workflows. Built the UI, backend, APIs, and webhooks, and deployed across development, QA, staging, and production.
- Designed and developed an AI assistant used by operators to generate suggested responses during lead conversations, including UI, backend, AI service integration, and operational documentation.
CO.FA.LO.ZA. Ltda.
Software Engineer
May. 2022 — Mar. 2023
- Took full ownership of a previously outsourced pharmacy sales platform built with TypeScript, Angular, and Symfony, establishing the company’s first internal development environment and supporting integration with legacy COBOL systems through Micro Focus Relativity.
- Migrated the application into the company’s version control system, restructured repositories, and documented the architecture, codebase, development environment, and integration flows, enabling the internal team to maintain the platform independently.
- Troubleshot and resolved production issues across the full stack using log analysis, cross-layer tracing, and New Relic.
- Automated daily order reports and metrics with Bash, cron, and MySQL, giving management earlier visibility into business activity.
- Automated backups for business-critical databases, reducing manual work and improving data recovery readiness; supported production releases end-to-end, including post-release validation.
Wize It · Personal projects
WES
Wize Engineering System: the system I use to build and maintain software at Wize It. It coordinates work with AI agents, repositories, and isolated workers through planning, audits, corrections, and human review.
Agents
Wize It’s multitenant conversational platform for WhatsApp, Telegram, and the web. I design and develop it to support reception, answer questions, qualify opportunities, and hand conversations to a person when needed.
Skills & Technologies
- Frontend / Mobile
- React, Next.js, TypeScript, Angular, React Native, Expo
- Backend
- Java, Spring Boot, C#, .NET, Node.js, NestJS, Python, FastAPI
- Architecture
- System design, REST APIs, webhooks, AWS SQS, core-system and mainframe integrations
- Security
- Sonatype, Fortify SCA, WebInspect, vulnerability remediation, framework upgrades
- Data
- PostgreSQL, MySQL, SQL Server, Entity Framework
- Platform
- Docker, CI/CD, Terraform, Ansible, Linux, Bash, cron, New Relic
- Applied AI
- AI assistants, AI service integration, agent orchestration
I also work with Kubernetes, Proxmox and Checkmarx, as well as observability and LLM integrations.
Education
Technical Degree in Web Development
Universidad Nacional de La Matanza
2019 — 2022
Certifications
- Desarrollo en React .JS · UTN Buenos Aires · 2023
- Curso de Next.js · Platzi · 2023
- Curso de APIs con .NET · Platzi · 2022
- Curso de Fundamentos de Entity Framework · Platzi · 2022
- Desarrollo con Angular · UTN Buenos Aires · 2022
- DevOps, integración y agilidad continua · UTN Buenos Aires · 2022
- Curso de Docker · Platzi · 2022
- Curso de Kubernetes · Platzi · 2023
Languages
English: Full professional proficiency. Portuguese: Elementary.