Fullstack Developer (Freelance) at Heller LLC (2025-06 – Present)
- Deliver multiple projects for a US-based company, moving fast and adapting almost immediately to new codebases and requirements.
- Integrated AI deeply into the development workflow, using Claude Code as a coding assistant to produce high-quality code that follows industry best practices.
- Customized the development environment by orchestrating multiple AI agents in parallel, along with skills, MCP servers, and code-indexing tools, to accelerate delivery while maintaining reliability and code quality.
Fullstack Developer at Código del Sur (2022-07 – 2026-05)
- Worked with React.js across several company projects over the last 3.5 years, providing production support, debugging, maintenance, and incremental feature development.
- Regularly analyzed existing front-end codebases, resolved issues in live environments, and implemented enhancements while ensuring reliable integration with backend services.
- Contributed to a NestJS-based Backend for Frontend (BFF) project responsible for consuming external APIs, processing data, and exposing client-oriented endpoints to support front-end applications efficiently.
Fullstack Developer & DevOps Support at Código del Sur (2025-07 – 2026-05)
Tech Stack: DigitalOcean, AWS (Replication, S3, Route 53), Azure, Docker
- Fullstack development with delegated infrastructure ownership, acting as DevOps for critical AWS replication workflows.
- Resolved complex incidents in core business systems to ensure real-time service stability and reduce operational risk.
- Proactively monitored and optimized cloud data flows to maintain continuity of transactional processes.
Backend Developer (Mobile API) at Código del Sur (2025-01 – 2025-06)
Tech Stack: Node.js (Express), SQL Server, Azure, Sequelize
- Designed and deployed a robust API for an audio streaming platform, optimizing content delivery for concurrent users.
- Provisioned Azure infrastructure from scratch and managed complex SQL Server schema migrations.
- Automated audio processing to convert high-fidelity formats into streaming-optimized versions, reducing bandwidth costs and improving load latency.
Senior Developer & Team Lead at Código del Sur (2022-01 – 2024-12)
Tech Stack: Ruby, Ruby on Rails, Heroku, Docker, Salesforce API, GitLab CI
- Led and mentored a team of 2 developers after an internal reorganization, ensuring knowledge transfer and operational continuity.
- Improved CI/CD performance, reducing deployment time from 23 to 16 minutes through parallel tests and a monitoring dashboard for flaky pipelines.
- Led the Ruby on Rails 6 to Ruby on Rails 7 migration, addressing technical debt and applying critical security updates.
- Built a custom gem to sync data with Salesforce and created a technical documentation standard later adopted by other teams.
- Fully dockerized the local environment, cutting onboarding time from days to hours.
- Reviewed and masked risky fields to prevent PII from being logged.
- Improved response times by identifying and fixing N+1 query issues using the Bullet and Prosopite gems.
- Implemented database indexes and foreign keys where needed to further improve performance.
- Reviewed, analyzed, and fixed issues in PostgreSQL autovacuum configuration.
Technical Coordinator & DevOps Owner at Web-Experto (2015-01 – 2022-12)
Tech Stack: Perl (MVC), DBIx::Class, PHP, MySQL, AWS, Docker, Linux (Ubuntu Server)
- Progressed from Fullstack Developer to DevOps Owner and then Technical Coordinator, leading Design, Backend, and Frontend teams.
- Managed a large-scale migration of 200+ customers from self-hosted servers to Amazon Route 53, coordinating technical communication with stakeholders.
- Implemented MySQL Group Replication (1 primary, 2 replicas) to remove single points of failure and improve availability.
- Optimized support for the company's largest customer through deep log analysis and deployment automation with GitLab CI.
- Performed corrective and preventive maintenance across legacy and modern architectures, stabilizing Perl (MVC) applications and planning gradual transitions to modern stacks such as Ruby on Rails, prioritizing operational continuity and risk reduction.
Backend Developer (Freelance) at Sinergia Software
Tech Stack: NestJS, Node.js, TypeORM, PostgreSQL, pdf-parse, tesseract.js, Poppler
- Built a multi-tenant engine to parse and extract structured data from Argentine fiscal documents (invoices, credit/debit notes) directly from PDFs and images, with no need to send any information to external AI services, keeping sensitive financial data fully private.
- Designed a declarative, template-based extraction system: per-provider and per-document-type JSON templates define fields via ordered lists of candidate regexes (with inline flags and selection strategies such as first and last_amount_match), marker-delimited tables with multi-line item parsing, and a recursive output-composition tree resolving @field, @table, and @default references into a normalized header/body/footer JSON structure.
- Implemented a document ingestion pipeline with multiple text-extraction strategies: pdf-parse for native PDF text, tesseract.js for OCR on images (configured for Spanish), and a Poppler pdftotext -layout fallback to preserve columnar layout for specific providers.
- Developed normalizers for Argentine formats (thousand/decimal separators, CUIT with check digit, DD/MM/YYYY to ISO dates) and per-provider post-processing to handle edge cases.
Freelance Projects at Freelance
Tech Stack: Ruby on Rails, GraphQL, Docker, React (coordinated team)
- Delivered custom WordPress sites end-to-end, including server provisioning, configuration, and production deployment.
- Built a management system (purchase and sales orders, inventory, reporting) using PHP and JavaScript.
- Built a platform from scratch for short-term event furniture rentals: products, date-based inventory, date-based price lists, orders, events, and delivery notes. Developed a custom internal engine to improve safety and enable reuse for new customers.
- Acted as backend delivery lead and client coordinator (prioritization, roadmap definition, and value proposals).
