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Software Engineer with 6+ years building full stack apps with ASP.NET Core, Angular, Node.js and React, from idea to deployment.
Corrientes, Argentina · Working remotely with teams worldwide.
SyK S.A. - Corrientes, Argentina.
GIS system used daily by around 90 staff at the Corrientes Land Registry: new modules in ASP.NET Core and Angular.
Maintenance and evolution of a web GIS system used daily by around 90 staff at D.G. CATASTRO (Corrientes Land Registry, Argentina) throughout the workday, plus external users with their own permissions and features. Built new modules with ASP.NET Core and REST APIs (Audit, Person Records Cleanup) and a search module in Angular powered by Apache Solr. Code reviews on GitHub, technical support for the team and production deployments on Windows IIS.
Barrilete Cósmico Lab (Spain) - Remote.
New Vue frontend for Hub City Guides, NestJS backend and Google Cloud deployments.
Built the new frontend for Hub City Guides (Vue.js, Figma). Full Google Calendar API integration across frontend and backend (NestJS). Implemented automatic tour tracking start with mobile support (Ionic + Android Studio). Managed production cloud deployments with Google Cloud Platform, Cloud SQL and GitHub Actions.
TecSystems (Chile) - Remote.
Backup link dashboard for Chile's Ministry of Health.
Maintenance of an admin dashboard for backup network links used by Chile's Ministry of Health (MINSAL), in a distributed remote team.
City of Corrientes - Argentina
Payroll processing in PHP and PostgreSQL, plus data scripts in Python.
Maintenance of the payroll module and bug fixing (PHP, PostgreSQL). Python scripts to fix production data and complex SQL reports.
Status of each project verified in October 2026.
In production // Ongoing improvements
Connects neighbors with verified technicians for home services: the client requests a service, the technician gets notified and payment goes through Mercado Pago. Includes dashboards for clients, technicians and admins, plus SEO tracking with Google Search Console.
In production // Private use
A land surveying firm enters each case's data once (surveys, boundary demarcations, subdivisions) and the platform automatically generates the official PDFs: Elevation Note, Survey Record and Neighbor Summons. Backend on Supabase/PostgreSQL.
Final stage // Pending link to sinergiapro.com.ar
Presents Sinergia Pro (engineering, construction and solar energy in northeastern Argentina) with its services, team and a map of completed projects, guiding every visit toward a quote request. New projects are added in Markdown and photos are optimized automatically (AVIF/WebP).
Final stage // Pending link to andreafredes.com.ar
Website for Andrea Fredes, a photographer in Corrientes: every session type with its pricing, real stories and date booking via WhatsApp. Services, prices and FAQs are updated from content files, without touching the code.
In production // Client's own domain
Corporate website for a low-voltage electrical installation company in Corrientes: services, completed projects, clients and team, with direct access to contact.
Online // Free · no sign-up
Rename up to 400 images at once: set a base name and download them numbered in a .zip. Everything runs in the browser, with no servers or libraries, so your files never leave your computer.
Finished // Used in the 2025 elections
Login-protected system for a political party's team to enter the results of each polling station and its certificates, and check overall results by party. Used in the 2025 Corrientes elections. Express and MongoDB backend, dockerized and tested.
Online Paste a URL and get its QR code instantly. Built with Astro, React and Tailwind.
Online A 2D block-stacking game: click or press the spacebar to stack as high as you can. Based on a project by midudev and rebuilt with Astro components.
PR merged // Open source project
Open source contribution to SVGL, the SVG logo library: raised its accessibility score from 90 to 95, and the PR was reviewed and approved by its creator, Pablo Hdez. View commit
I'm Juan Cruz Martínez, a Software Engineer with 6+ years of experience focused on building and maintaining web applications, working across both frontend and backend in production environments and distributed teams.
I hold a degree in Information Systems from UNNE, I've built multiple projects from scratch, and I specialize in ASP.NET Core, Angular and Node.js, with PostgreSQL/MySQL databases and cloud deployments (GCP). Currently focused on improving processes and business rules to increase revenue and reduce costs. Working remotely with global and local teams.
