Hi, I'm Milton 👋I build scalable backends, APIs, and cloud-powered platforms

Full-Stack Developer with 6+ years of experience designing and scaling backend-heavy systems using Python, Node.js, and TypeScript. I help startups build secure, scalable systems that deliver real business results.

Hire Me View Projects
Medellín, Colombia
milton@miltondev.digital
+57 350 679 1746

Why Work With Me

I help startups scale infrastructure, optimize backend performance, and automate deployments — fast and reliably.

AWS Cloud & Serverless Architecture
PostgreSQL, MongoDB & performance tuning
DevOps: Docker, GitHub Actions, Terraform
Scalable APIs, security, CI/CD
Used by real users in production

Experience

Roles, companies, and technologies I've worked with

FREELANCE | Fullstack & Backend Engineer
Freelance • 2025 – Actualidad
  • Desarrollador fullstack con enfoque en fintech, cloud y AI, trabajando en proyectos freelance para clientes internacionales.
  • Geeks5G (EE. UU.): Plataforma de bookkeeping con AWS serverless, NestJS, Next.js y PostgreSQL. Integración de LangChain + LLMs (OpenAI), AWS Textract (OCR) y SendGrid para notificaciones.
  • +2 experience.experience.more...
LEANWARE.IO | Senior Backend Engineer
Leanware.io • Dic 2022 – Mar 2025
  • Arquitectura y desarrollo de microservicios con NestJS y Django.
  • Integración con AWS (Cognito, Lambda, S3, EventBridge, SQS).
  • +2 experience.experience.more...
BLOSSOM.NET | Backend Engineer
Blossom.net • May 2024 – Sept 2024
  • Desarrollo de backend financiero en Apollo GraphQL y PostgreSQL.
  • Implementación de seguridad y gestión de transacciones.
  • +1 experience.experience.more...
LEANWARE.IO | Backend-Fullstack Engineer
Leanware.io • Mar 2023 – Oct 2023
  • Backend en Node.js y Knex.js sobre MySQL.
  • Frontend en React para herramientas internas.
  • +1 experience.experience.more...
LEANWARE.IO | Data Engineer
Leanware.io • Nov 2021 – Mar 2023
  • Integración de APIs con AWS Lambda y Serverless Framework.
  • Workflows en tiempo real con DynamoDB, EventBridge, SQS y Step Functions.
  • +1 experience.experience.more...
PLURIZA | Backend Engineer
Pluriza • Oct 2020 – Nov 2021
  • Migración de monolito a microservicios con Node.js y Python.
  • Unit testing con Jest y unittest.
  • +1 experience.experience.more...
CODE ROOT | Backend Engineer
Code Root • Ene 2019 – Sept 2020
  • Desarrollo de sistema biométrico de asistencia con arquitectura backend en Java.
  • Interfaces web en Angular + TypeScript.

Featured Projects

Real-world solutions built for production

REMpays

Demo
Rempays - WhatsApp Cloud API Tech Provider
SaaS B2B platform serving as an official Meta Tech Provider, eliminating costly intermediaries by enabling businesses to connect their own WhatsApp numbers (BYON) directly to Meta's Cloud API. Architected and developed end-to-end, including Meta Business verification, App Review process, Embedded Signup OAuth flow, multi-tenant webhook infrastructure, and optimized billing leveraging Meta's wholesale pricing—delivering significant cost savings while scaling chatbots and support systems.
Rempays
NestJS
TypeScript
Meta Cloud API
OAuth
Webhooks
Multi-tenant
AWS
PostgreSQL
WhatsApp Business API
Meta Business
Pluriza - Estori.co E-commerce Platform
Demo
Pluriza - Estori.co E-commerce Platform
All-in-One eCommerce platform for Latin America, offering personalized shopping experiences. Migrated from monolithic to serverless architecture.
Pluriza
NestJS
AWS Lambda
MongoDB
Serverless
CloudFormation
S3
API Gateway
EventBridge
SQS
Leanware - Monstro.com Financial Data Aggregation
Demo
Leanware - Monstro.com Financial Data Aggregation
Platform to aggregate and normalize financial and real estate user data from various bank APIs (Plaid, Finicity) using an ETL-like process.
Leanware
NestJS
DynamoDB
Serverless Framework
AWS Lambda
EventBridge
CloudFormation
API Gateway
Grafana
S3
Step Functions
SQS
SNS
Leanware - Canadian Orthodontic Partners Web Portal
Demo
Leanware - Canadian Orthodontic Partners Web Portal
Full-stack web application for Canadian Orthodontic Partners, providing support services to independent practitioners to optimize patient care.
Leanware
Node.js
Express.js
React
MySQL
GCP
Full-stack
Leanware - Plannerd.com Wedding Planning Platform
Demo
Leanware - Plannerd.com Wedding Planning Platform
Collaborative wedding planning platform for couples and their support teams, featuring robust backend and responsive frontend.
Leanware
Django
Python
PostgreSQL
React
AWS Lambda
Cognito
EventBridge
SNS
AI
LangChain
OpenAI
Blossom - Credit Union Banking Solution
Demo
Blossom - Credit Union Banking Solution
All-in-one core and digital banking platform for credit unions, providing mission-critical systems and administrative tools.
Blossom
Node.js
Express.js
Sequelize
PostgreSQL
AWS CloudWatch
Geeks5G - CPA Bookkeeping AI-Powered Transaction Processing
Demo
Geeks5G - CPA Bookkeeping AI-Powered Transaction Processing
AI-driven platform to extract and process financial transactions from bank statements (PDF/image) using serverless architecture.
Geeks5G
NestJS
AWS Lambda
PostgreSQL RDS
EventBridge
S3
AWS SDK
Cognito
Google Authentication
AI
LangChain
OpenAI

Tech Stack

Technologies I use to build scalable solutions

Backend

NestJS
Django
Node.js
Express
FastAPI
Python

Databases

PostgreSQL
MongoDB
MySQL
Redis
pgvector
Supabase

Cloud & DevOps

AWS Lambda
Docker
Terraform
GitHub Actions
Vercel
S3

Frontend

React
Next.js
TypeScript
Tailwind CSS
Angular
Flutter

AI & ML

LangChain
OpenAI
Embeddings
Vector DB
Hugging Face
TensorFlow

Let's Work Together

Ready to scale your backend? Let's discuss your project.

Send a Message
Fill out the form below and I'll get back to you within 24 hours.

Email

milton@miltondev.digital

I typically respond within 24 hours

Phone

+57 350 679 1746

Available for calls Mon-Fri, 9AM-6PM COT

WhatsApp

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