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Alexis Jares

AI engineer & full-stack developer

Three years building web and mobile apps with React, Next.js, Angular and Node for software companies, startups and freelance clients. Computer Engineering student at UNTREF, Buenos Aires.

See my projects
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Alexis at a whiteboard, explaining a matrix exercise to two classmates in the university library

Experience

Three years across a software company, an e-learning centre and freelance work.

HEL-ALI

Freelance · May 2025 – present

Full-stack developer + AI

  • Built a donations platform with Stripe and DLocal for international and local payments.
  • Used Supabase for database, auth and edge functions, cutting backend and infrastructure costs.
  • Designed the database schema and implemented PostgreSQL with Drizzle ORM.
  • Deployed the React and Next.js frontend on Vercel with secure environment variables.
  • Implemented webhooks to track payment states and automate workflows.

Stack: Next.js, React, TypeScript, Supabase, PostgreSQL, Drizzle ORM, Stripe, DLocal, Edge Functions, Deno, Vercel

Live site (opens in a new tab)

Anfibia

Software company · Dec 2025 – May 2026

Full-stack developer (semi senior)

  • Shipped features in Scrum across four projects at once on legacy code, refactoring as I went.
  • Backend with Express, PostgreSQL and TypeORM; auth with Firebase and sessions with Clerk.
  • Designed new schemas and entities with one-to-one, many-to-one and many-to-many relations.
  • Resolved merge conflicts and coached the team on Git workflows that avoid lost work and risky resets.

Projects

Bullstock · Oxitesa mobile

React Native app built from scratch for stock, bookings and deliveries: offline mode with SQLite and a request queue, QR and barcode scanning, Android and iOS, phone and tablet.

Hospital Posadas

Built from scratch the Angular admin for staff, services and schedules, the base for an appointment system with limits and overlap checks.

Sedit & Proyectar

Angular features for hospital billing; a reusable table checking each patient’s minimum and maximum care by type and month.

Oxitesa web

Angular features for billing oxygen-therapy deliveries authorised by health insurers.

Stack: Angular, React Native, Expo, TypeScript, Express, PostgreSQL, TypeORM, MySQL, SQLite, Firebase, Clerk, Tailwind CSS, PrimeNG

UTN centro de e-learning

Tuten Globals · UTN · Apr 2024 – Apr 2025

Frontend developer + AI

  • Built an embedded AI chatbot from scratch, optimised for performance and responsive design.
  • Built and maintained back-office features on the internal design system.
  • Sped up development by 50% through reusable components and clean architecture.
  • Made the interface more compatible and modular with SASS and shadow DOM components.

Stack: React, Next.js, Astro, TypeScript, SASS, Supabase, Stripe, Node.js, Express

Live site (opens in a new tab)

Selected projects

Green opens the code, blue the live site.

  • HEL-ALI Foundation home page: a girl hugging a man in a straw hat under the headline "Empoderando comunidades, transformando vidas"

    HEL-ALI

    Freelance · Donations platform

    Donations platform for a foundation supporting communities in Colombia: Stripe and DLocal payments, webhooks for payment states, and a Supabase and PostgreSQL backend.

    Role
    Full-stack development + AI
    Stack
    Next.js, React, TypeScript, Supabase, PostgreSQL, Drizzle ORM, Stripe, DLocal, Vercel
    Live site (opens in a new tab)GitHub· Private repo
  • Rosana Colman home page: serif headline "Integrar consciente" beside a hummingbird logo on a lilac background

    Rosana Colman

    Freelance · Coaching site

    Landing page for a private coaching client, architected to grow into a booking platform with payments, a metrics dashboard and a Supabase backend.

    Role
    Design and development
    Stack
    Astro, React, TypeScript, Tailwind CSS, Supabase, PostgreSQL
    GitHub (opens in a new tab)Live site· In progress
  • NextLevel Food home page: dumplings photo beside the headline "NextLevel food for NextLevel foodies"

    NextLevel Food

    Full-stack · Next.js

    A community where food lovers share recipes, built with the Next.js App Router during Maximilian Schwarzmüller’s React and Next.js course.

    Role
    Development
    Stack
    Next.js, React, JavaScript, CSS Modules, Vercel
    GitHub (opens in a new tab)Live site (opens in a new tab)
  • 4 Pilares Voley home page: team photo on the court under the club’s orange 4P logo

    4 Pilares Voley

    Website · Volleyball club

    Site for the volleyball club I played in, in Pilar, Buenos Aires. Built on Google Sites so the club pays no monthly fee: teams, gallery and how to find them.

    Role
    Design and content
    Stack
    Google Sites
    Live site (opens in a new tab)GitHub· No-code

What I work with

Each tool, and where I used it.

Frontend

  • ReactHEL-ALI, UTN e-learning, Rosana Colman, NextLevel Food, This portfolio
  • Next.jsHEL-ALI, UTN e-learning, NextLevel Food, This portfolio
  • AngularAnfibia
  • React NativeAnfibia
  • AstroUTN e-learning, Rosana Colman
  • TypeScriptHEL-ALI, Anfibia, UTN e-learning, Rosana Colman
  • Tailwind CSSAnfibia, Rosana Colman, This portfolio
  • SASSUTN e-learning

Backend and data

  • Node.jsUTN e-learning
  • ExpressAnfibia, UTN e-learning
  • SupabaseHEL-ALI, UTN e-learning, Rosana Colman
  • PostgreSQLHEL-ALI, Anfibia, Rosana Colman
  • MySQLAnfibia
  • SQLiteAnfibia
  • Drizzle ORMHEL-ALI
  • TypeORMAnfibia

Payments and auth

  • StripeHEL-ALI, UTN e-learning
  • DLocalHEL-ALI
  • FirebaseAnfibia
  • ClerkAnfibia

Tools and delivery

  • VercelHEL-ALI, NextLevel Food, This portfolio
  • Edge FunctionsHEL-ALI
  • ExpoAnfibia
  • Git and GitHubHEL-ALI, Anfibia, UTN e-learning, Rosana Colman, NextLevel Food, This portfolio

About me

Portrait of Alexis smiling, wearing glasses and a black hoodie

I’m Alexis. I was always the one my family called when a phone slowed down or a computer refused to start, the kid who installed the games and taught Word and Excel as if it were a job.

Those small favours were the start. I wanted to know how the things I fixed were made, and that took me to frontend development, and from there to the server side.

Today I study Computer Engineering at UNTREF, and I have three years of experience: frontend and AI at UTN’s e-learning centre, full-stack at Anfibia across four projects at once, and freelance for the HEL-ALI foundation.

I build with React, Next.js, Angular and React Native on the front and Node, Express and Nest on the back. I care about performance, user experience and clean architecture, and lately about AI: automation and intelligent interfaces.

To sacrifice everything to do what you love, that is the purpose of life.

Alexis Jares

AI engineer & full-stack developer

Education

  • Computer Engineering

    UNTREF · Mar 2023 – present

    Computer Engineering degree at the Universidad Nacional de Tres de Febrero, Buenos Aires.

  • Certifications

    Eight courses

    Logical thinking, software engineering, databases, software architecture, Next.js and React, frontend development, Git and GitHub, and development with Claude Code.

  • Languages

    Spanish and English

    Native Spanish and intermediate English.

  • Graphic design

    Additional skill

    I also work in graphic design, which helps me take an interface from layout to code.

Hiring, or have a project? Write me a line.

Opens your email app with the message ready to send.

Email
alexis.jares12@gmail.com
Based in
Buenos Aires, Argentina
Links
GitHub (opens in a new tab)LinkedIn (opens in a new tab)