Elí Montellano

I architect products that turn operational chaos into software ready to scale.

Senior Full-Stack Developer / Tech Lead / Technical Consultant

Since 2010, I have been building real systems across SaaS, applied AI, e-commerce, and cloud. From idea to deployment, with product judgment and hands in the code.

Start a conversationSee impact

Since 2010

building real systems end to end

SaaS, applied AI, e-commerce, and cloud

in high-demand environments

Tech Lead

multidisciplinary teams focused on outcomes

Clean code, solid architecture

and reliable delivery

Products and impact

I build products that create sustainable value.

I combine strategy, architecture, and execution to solve complex problems with software that stays simple, scalable, and maintainable.

See experience

Real scalability

Architectures prepared to grow without breaking.

Continuous delivery

From idea to deployment with modern practices and automation.

Data that matters

Models and structures that turn data into decisions.

Experiences that convert

Fast, accessible interfaces focused on the end user.

Recent portfolio

Real implementations that turn ideas into operating products.

These projects show how I translate business needs into clear experiences, stable systems, and visible outcomes: from AI-powered ATS and work-language assessments to commercial sites and e-commerce.

Preview of Balder Jobs
AI-powered ATS

Balder Jobs

Balder Jobs was built so recruiting stops feeling like reviewing resumes in the dark. I turned that friction into an ATS with semantic matching, cognitive profile reading, job-fit scoring, and company pipelines, while also protecting the candidate experience. My work connected product strategy, frontend, NestJS backend, AI/RAG, embeddings, and async flows to reduce noise, save operational time, and support decisions with better context.

  • Next.js
  • NestJS
  • PostgreSQL
  • pgvector
  • Gemini
  • RabbitMQ
Preview of Balder English
Work-language assessments

Balder English

Balder English helps validate workplace communication before spending another interview cycle. I built it as an independent product with a three-question flow, private audio, company dashboard, actionable report, and orientative CEFR level, always keeping the final decision human. The implementation combined a calm candidate experience, API integration, Next.js frontend, and product guardrails so HR can move with evidence instead of assumptions.

  • Next.js
  • TypeScript
  • NestJS
  • Gemini
  • Audio
  • Docker
Preview of Balder Technology
Corporate site

Balder Technology

Balder Technology needed to explain a broad technical offer without sounding abstract. I structured a commercial site that translates custom software, AI, e-commerce, ERP, and automation into concrete benefits for growing companies. I worked on the Laravel/Inertia architecture, UI, commercial copy, technical SEO, brand assets, and a contact journey that turns a visit into a consultative conversation.

  • Laravel
  • Inertia
  • React
  • Tailwind CSS
  • SEO
  • Docker
Preview of Supple-Sport
E-commerce

Supple-Sport

Supple-Sport needed to feel trustworthy from the first second: fast, clear, and ready to buy from. I redesigned the experience with a mobile-first approach, stronger visual identity, conversion-oriented structure, and product presentation built to reduce friction. From storefront to reusable components and deployment preparation, the goal was to make the store feel ready to sell for real.

  • React
  • TypeScript
  • Node.js
  • Tailwind CSS
  • Docker
Preview of ANM Nutrition
Lead-generation site

ANM Nutrition

ANM Nutrition needed to turn a visit into enough trust to book an appointment. We built a responsive site that communicates professional authority, performance-focused nutrition, and a clear route to scheduling. My work integrated WordPress/PHP, section structure, contact form, responsive optimization, and a visual presentation aligned with people looking to improve performance through serious guidance.

  • WordPress
  • PHP
  • ACF
  • Contact Form 7
  • SEO
Professional experience
2026

Tech Lead / Software Architect

Balder Technology

SaaS, applied AI, and cloud. I lead architecture, development, and technical strategy for recruiting and assessment products with product judgment and real deployments.

2025 - 2026

Senior Full-Stack Developer / Technical Consultant

Perficient

Adobe Commerce for high-traffic e-commerce: Magento 2 modules, New Relic, Docker, CI/CD, and root-cause analysis focused on stability and recurring incidents.

2025 - 2026

Full-Stack Developer / Tech Lead / Product Owner

AssetControl

Cloud-native MicroERP with Laravel, Next.js, React TypeScript, AWS, n8n, MySQL, GitHub Actions, and MercadoPago; accelerated delivery with AI and full product ownership.

2025

Full-Stack Developer

Inhabit

Multi-tenant SaaS with PHP, Laravel, MySQL, REST APIs, HTML5, and CSS3; backend modules, permissions, billing, and clean contracts between frontend and API.

2024 - 2025

Tech Lead / Product Owner

Cactus Feliz

Migration from legacy OpenCart to Laravel + React/Vite, technical SEO, and a validated 35% improvement in load times.

2021 - 2024

Senior Full-Stack Developer / Team Lead

Globant

Hospitality platform in the United Kingdom, greenfield React/Vite app, +25% performance improvement, and formal client recognition.

2020 - 2021

Full-Stack Developer

Mcpa S.A.

Laravel contract to evolve backend modules, fix bugs, create HTML5/CSS3 views, and maintain Git discipline, branches, and code reviews.

2019 - 2020

Full-Stack Developer

SIHoteles

Hotel platform in Laravel: reservations, availability, billing, multi-property dashboards, internal APIs, and MySQL query optimization.

2017

Full-Stack Developer PHP / Java

Dextra

Business applications with PHP, Java, MySQL, HTML5, CSS3, and JavaScript, following MVC patterns, OOP, version control, and peer review.

2016

Full-Stack Developer

SOLUSoftware

ERP/CRM modules with CakePHP 2.x, MySQL, HTML5, CSS3, and JavaScript; client tickets, evolutionary maintenance, and visual consistency in internal systems.

2015 - 2017

Full-Stack Developer

State Judiciary

Internal systems for management, documents, and administrative processes with PHP, Laravel, MySQL, and jQuery, prioritizing data integrity, validation, and traceability.

2011 - 2013

Tech Lead / Full-Stack Developer

SIFO

Small-team leadership and web platform architecture with native PHP, JavaScript ES5, HTML, CSS, and MySQL, from technical planning to deployment.

2010 - 2011

Junior Java Backend Developer

Grupo Vidanta

First professional role: Java and SQL backend maintenance for a hospitality special-request platform, resolving tickets in an enterprise environment.

Globant to Balder Technology: the stage where technical judgment becomes product, leadership, and impact.

Technology stack

Languages

  • TypeScript
  • JavaScript
  • PHP
  • Python
  • Java
  • SQL

Frontend

  • React
  • Next.js
  • Vite
  • HTML5
  • CSS3 / SCSS
  • WCAG 2.1 AA

Backend

  • Node.js
  • NestJS
  • Laravel
  • Lumen
  • CakePHP
  • REST / GraphQL

Data

  • PostgreSQL
  • MySQL
  • MongoDB
  • pgvector
  • RabbitMQ
  • SQL indexing

Cloud & DevOps

  • AWS
  • Azure
  • Vercel
  • Cloud Run
  • Docker
  • CI/CD

E-commerce

  • Magento 2
  • Adobe Commerce
  • Shopify
  • PrestaShop
  • OpenCart
  • MercadoPago

ERP, CRM & AI

  • Odoo
  • n8n
  • MCP
  • Claude
  • Cursor
  • Amazon Q

Tools

  • Git
  • GitHub
  • GitLab
  • Jira
  • New Relic
Applied AI

I integrate AI where it creates real value.

I have implemented AI features that optimize processes, improve decisions, and elevate user experience.

Intelligent automation

Flows that remove repetitive work and accelerate operations.

Analysis and prediction

Models that turn data, resumes, and assessments into actionable signals.

Assisted experiences

Interfaces where AI supports decisions without hiding human judgment.

Responsible integration

Architecture, guardrails, and clear contracts to operate with confidence.

Leadership and value proposition

Owner mindset

I get involved as a technology partner, not just as a developer.

Clear communication

I translate technical complexity into concrete business decisions.

Outcome focus

Priority on impact, quality, and long-term software sustainability.

Teams that grow

Mentorship and talent development to multiply team capability.

Certifications
  • Professional Scrum Master I - Scrum.org
  • Bachelor's degree in Informatics / Systems - UDG
Languages
Spanish
Native
English
C1 Advanced

Let’s build what comes next.

If you are looking for a technical leader who turns ideas into scalable products, let’s talk through the professional channel where you found this profile.

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