Alejandro Restrepo López

Full-Stack Developer (Mid-Level) | Backend & Cloud | Tech Lead (Project Ownership) | Builder

Medellín, Antioquia, Colombia
Alejandro Restrepo López

About

I am a full-stack software developer with a strong backend focus and a track record of taking products from requirements through deployment and production support. I have technically led building a platform from the ground up, defining architecture, stack, and engineering standards, with technical decisions aligned to the business. I mainly work with Java and Spring Boot to design REST APIs and real-time systems with WebSockets, alongside frontend work with React, TypeScript, and Next.js. I have solid experience modeling relational data with PostgreSQL, tuning performance with Redis, containerizing services with Docker, and shipping on AWS (EC2, RDS, Amplify, CloudFront, IAM, Lambda), plus infrastructure work with Cloudflare. I am known for a practical, outcomes-driven approach, sound technical judgment, and shipping scalable solutions from early product stages. I am currently going deeper on infrastructure as code with Terraform and CI/CD pipelines with GitHub Actions.

Experience

Freelance

Jan 2023 - Present
Full-Stack Developer / Software Engineer

Designed and implemented end-to-end software architectures with Java and Spring Boot, delivering scalable REST APIs aligned with enterprise engineering standards.

  • Led complete project lifecycles: requirements analysis, solution design, implementation, testing, deployment, and production monitoring.
  • Built and deployed AWS cloud infrastructure with Docker, Terraform (IaC), and GitHub Actions CI/CD pipelines.
  • Improved performance and scalability through advanced relational data modeling and normalization in PostgreSQL.
  • Developed modern, maintainable frontend interfaces with React, Next.js, and TypeScript.
  • Applied ISO 25010 software quality principles and engineering best practices, including testing, documentation, and user guidance.
  • Managed direct client communication and technical alignment with business objectives.
Java Spring Boot AWS Terraform Docker PostgreSQL React

Ultravioleta DAO

Mar 2023 - Feb 2026
Product Manager / Business Analyst

Designed and developed end-to-end backend infrastructure for the DAO ecosystem with Node.js and REST APIs, ensuring high availability and integration with distributed systems.

  • Implemented software architecture patterns for complex business logic and automated monitoring using LLM-based data analysis workflows.
  • Built frontend components and integration systems with React and TypeScript for critical product features.
  • Managed deployments, performance tuning, and production support under DevOps and software quality practices.
  • Collaborated on technical standards and development processes in agile teams.
Node.js REST APIs React TypeScript LLMs

Avalanche

Mar 2023 - Feb 2026
Ambassador

Led community growth and expansion initiatives through workshops, hackathons, and bootcamps, while driving Web3 education and adoption with university programs.

Community Web3 Education

Racketball

2022
Sales and Customer Retention Specialist
  • Managed commercial advisory and sales operations focused on target achievement and customer retention.
  • Handled customer support and effective sales closing across in-person and digital channels.
  • Developed consultative sales, negotiation, and commercial follow-up capabilities.
  • Strengthened customer relationships and contributed to new client acquisition.
Sales Customer Retention Negotiation

Education

Tecnológico de Antioquia - University Institution

Software Engineering

Servicio Nacional de Aprendizaje (SENA)

Tech in Multimedia Design

Recent Projects

Personal Medical Website

Production-ready landing page built with Next.js (App Router), React, and TypeScript, featuring reusable UI with Tailwind CSS, shadcn/ui, and Radix UI, contact integration via Formspree, and production analytics with Vercel Analytics.

Next.js React TypeScript Tailwind CSS shadcn/ui Radix UI Formspree Vercel Analytics

UltravioletaDAO Infrastructure

UltravioletaDAO web infrastructure. Frontend (UVDWeb) for the public interface and Backend (UVD Backend) for the logic, APIs, and blockchain connection of the ecosystem.

React Node.js Web3 API

Ultravioleta Token

ERC-20 token project developed with Hardhat and TypeScript, designed for deployment on the Avalanche Testnet.

Solidity Hardhat TypeScript Avalanche

Cucholand

Terraform-based project to automate the creation of a Minecraft server on AWS, including an EC2 instance and persistent S3 storage.

Terraform AWS EC2 S3

GreenBlocks

GreenBlocks is a solution that connects environmental projects with companies seeking emission returns.

Blockchain ReFi Sustainability

dAgro

dAgro: Using blockchain to connect producers and consumers for a more honest and sustainable agricultural system.

Blockchain Agriculture ReFi

Awards & Honors

EthColombia Hackathon

Celatam bounty winner. Development of blockchain solutions focused on Latin America.

Hackathon Blockchain
Avalanche Summit Argentina

ReFi (Regenerative Finance) bounty winner. Innovation in sustainable decentralized finance.

ReFi Avalanche

Technical Skills

Java
Microservices
Spring Boot
Spring Security
JavaScript
Node.js
REST APIs
React.js
Next.js
Git
Linux
SSH
Unit Testing
SQL
Microsoft SQL Server
PostgreSQL
Redis
Docker
AWS
Terraform
GitHub Actions
CI/CD
WebSocket
JWT
JSON
Solidity
Web3.js
Ethers.js
Avalanche
Blockchain
DAO Governance
Artificial Intelligence (AI)
Claude Code Subagents
Scrum
English

Certifications

AWS Certified Solutions Architect - Associate

AWS

Subnet Architecture

Avalanche

Avalanche Fundamentals

Avalanche

English Sessions

Language

Intelligence for cybersecurity

Platzi