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Esteban AleartEA

Esteban Aleart

Full Stack Developer | SaaS & B2B Platforms | Scal

€150/day
Madrid, ES
3-7 years

Average response time: 1 hour

About Esteban

I help SaaS and B2B companies turn ideas into scalable, maintainable digital platforms. My approach goes beyond coding: I focus on architecture, usability, and performance to ensure that every solution is not only functional but also strategically aligned with business goals.

As a Full Stack Developer, I lead end-to-end projects—defining technical architecture, implementing React/Next.js frontends, Node.js backends, and PostgreSQL databases, while integrating APIs, dashboards, and real-time systems using tools like Socket.io and Chart.js. I specialize in building CRMs, SaaS platforms, and growth systems that combine automation, branding, SEO, and data tracking for measurable impact.

My experience spans from creating teleconsultation platforms and real-time chat solutions to interactive dashboards and dynamic reports. I prioritize maintainable code, performance optimization, and user-friendly design, always keeping long-term scalability in mind.

I also collaborate with a small network of trusted partners, covering branding, marketing, and growth strategy, so projects can extend beyond technical development when needed.

Let’s connect to discuss how I can help your project succeed. Check out my portfolio for examples of my work or schedule a call to explore possibilities.
  • Spanish

    Native or bilingual

  • English

    Fluent

Can work on-site
Madrid (up to 50km), Valencia (up to 50km), Barcelona (up to 50km), Málaga (up to 50km)

Experience

  • HENRY
    Teaching Assistant
    December 2023 - Today (2 years and 6 months)
    Facilitate learning by providing technical support and creating an environment of trust. I resolve doubts, teach technical classes and promote collaboration between students, inspired by my positive experience as a student from my TAs. My goal is to empower each student to reach their full potential and contribute to the collective success of the group.
    ERP System Customization IT Architecture CI/CD Management IT Strategy Dashboard
  • ROSARIO S MUNICIPALITY
    Nurse (Mat. 8337)
    January 2020 - January 2025 (5 years)
    Rosario, Argentina
    Professional Nurse (Mat. 8337) with experience in various care settings, including ICU, coronary, hemodialysis, on-call and hospitalization, with a current focus on ICU. I also have experience in teaching and research.
    trabajo bajo presión Trabajo en equipo Liderazgo Liderazgo de equipos Gestión de equipos
  • PairProgramming
    Full Stack Developer / Frontend Lead
    January 2025 - Today (1 year and 5 months)
    Spain
    • ● Technical and architectural leadership of complete web projects.
    • ● Stack definition, architecture design, technical roadmap, and quality standards.
    • ● Full Stack development with Next.js, React, Node.js, Express, SQL, Sequelize, and Socket.io.
    • ● Deployment management on Vercel, Heroku, and cloud environments.
    • ● Direct client relationship, functional analysis, and translation of business requirements into scalable and maintainable technical solutions.
    • ● Featured projects in production: /
    Express SQL Node.js Next.js JavaScript

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Education

  • Full Stack Web Development.
    HENRY
    2023
    Full Stack Web Development.
  • Systems engineering.
    CENTURY
    2026
    Systems engineering.

Skill set

Categories