Matías Fernández

OPEN TO SENIOR AND LEAD ENGINEERING ROLES

Matías Fernández

Senior Full-Stack Engineer
TypeScript · React · Next.js · Node.js · AWS

I build reliable web products end to end, with deep frontend expertise and production experience across APIs, cloud systems, and AI-enabled workflows.

10+ years shipping software from Argentina, with overlap across American time zones.

  • 10+years shipping software
  • 1K+documents through AI pipelines
  • 35%faster Business Intelligence dashboard
  • ~30%lower infrastructure cost from a team migration

Individual results unless the sentence says otherwise. Targets are labelled as targets.

01 / SELECTED WORK

Four pieces of work.
Ownership stated exactly.

Enterprise AI, a public retrieval product, an offline-first clinical documentation MVP, and a modernization whose result belongs to a team.

012024 — NOW

Enterprise AI Platform

Frontend lead · hands-on across the stack

An Azure OpenAI product for an enterprise healthcare client. I lead its React and Next.js frontend and contribute targeted work across document processing, retrieval, streaming, .NET, and Azure Functions.

1,000+ documents through the pipeline · sub-2s time-to-first-token target
  • React
  • Next.js
  • Azure OpenAI
  • Pinecone
  • SignalR
  • .NET
Read the case study
02PUBLIC REPOSITORY

AI Knowledge Platform

Sole author · product and engineering

A document knowledge platform where retrieval quality, honest failure states, and verifiable citations are product surfaces. Milestones 1–3 are accepted; grounded answers are implemented and await live-provider acceptance.

3 / 5 milestones accepted · Recall@3 and MRR@3 enforced in CI
  • Python
  • FastAPI
  • Next.js
  • TypeScript
  • SQLite FTS5
  • OpenAI Responses API
Read the case study
032026 · FUNCTIONAL MVP

PsiNota

Sole author · product design, architecture, and full-stack engineering

A mobile-first, offline-first product that turns mental-health consultation audio into an editable clinical-note draft. It combines resilient capture, asynchronous AI processing, human review, versioning, and audit history.

7 / 7 tests passing · API, web, and service-worker production builds verified
  • React 19
  • TypeScript
  • Express
  • PostgreSQL
  • TypeORM
  • OpenAI
  • PWA
  • Docker
Read the case study
042019 — 2021

Serverless Platform Modernization

Full-Stack Engineer · shared technical coordination

An Angular 7-to-12 modernization and a move from Java services to Node.js and TypeScript serverless services on AWS. I shared coordination of the UI work with two other developers.

Team migration reduced infrastructure cost by ≈ 30%
  • Angular
  • Node.js
  • TypeScript
  • AWS Lambda
  • DynamoDB
  • Terraform
Read the case study

02 / EXPERIENCE

A decade of
shipping software.

Product teams, technical leadership, modernization, cloud, and applied AI.

Open the complete résumé
01
2022 — NOW
Amplity Health

Argeniss Software

Senior Full-Stack Engineer

Frontend lead of AI Studio and hands-on contributor across Azure IC Portal, an inherited Website Chatbot, an internal SDLC platform, and Amplity.com.

1,000+ documents processed · 35% faster BI dashboard
02
2021 — 2022
Bloomberg LP · Workpaper

Endava

Full-Stack Engineer

React, Redux, TypeScript, Node.js, PostgreSQL, Docker, and AWS during the product’s beta launch, plus Web Vitals and end-to-end coverage.

Frontend + backend · mentoring and reviews in a 5-person team
03
2019 — 2021
TechInsights · BA147 · SUACI

Hexacta / GlobalLogic

Full-Stack Engineer

Serverless migration, Angular 7-to-12 modernization, analytics widgets, Terraform infrastructure, Ionic mobile delivery, and Java/Spring Boot services.

Team migration reduced infrastructure cost ≈ 30%
04
2016 — 2019
Government of Entre Ríos · Genosha

Earlier work

Software Engineer

Public-sector platforms with PHP, Oracle, React and Laravel, ETL automation with Node.js, and a video-generation platform on Docker, AWS ECS, and FFmpeg.

Regulated systems · auditing · traceability · compliance

03 / SELECTED WRITING

How I think about systems.

All writing

AVAILABLE FOR NEW WORK · REMOTE FROM ARGENTINA

Looking for someone
who can own the product end to end.

I’m focused on Senior Full-Stack Engineer roles where TypeScript, React, Next.js, Node.js, AWS, and production AI experience are useful together.

BEST-FIT ROLES

Senior Full-Stack Engineer · TypeScript / React / Next.js / Node.js / AWS · AI-enabled products

PREFERRED ENVIRONMENT

Remote from Argentina with overlap across American time zones · B2B SaaS, AI platforms, developer tools, data products, fintech, healthtech, and enterprise software · Product teams with technical autonomy and room to make architectural decisions

fernandez.amatias@gmail.com I usually reply within two business days.