I Build the Backend Your eCommerce Business Actually Needs

Django developer with 11+ years of experience building custom eCommerce platforms, complex API integrations, and AI-powered automation for growing online businesses.

Book a Free Strategy Call See My Work
11+ Years Experience 30+ Projects Delivered Python · Django · AWS
The Problem

Sound Familiar?

Your Shopify/WooCommerce store hit its limits and you need custom functionality.
Your systems don't talk to each other — orders, inventory, payments, CRM are all disconnected.
You're paying developers by the hour with no clear deliverables or timelines.
You need AI automation but don't know where to start or who to trust.
Services

How I Help eCommerce Businesses Scale

Three productized packages with clear scope, fixed pricing, and no hourly billing games.

Package 1

API Integration Sprint

Starting at
$2,500 USD
// 2 weeks
  • Connect any two systems (Stripe, Shopify, HubSpot, QuickBooks, ERP)
  • Bidirectional data sync
  • Error handling & monitoring
  • Documentation & handoff
You need your systems connected and data flowing automatically.
Book a Call to Discuss
Package 2

Custom Backend Build

Starting at
$6,500 USD
// 4–6 weeks
  • Custom Django backend with REST API
  • Database architecture & optimization
  • Admin dashboard
  • Authentication & permissions
  • Deployment to AWS / cloud
  • 30 days post-launch support
You need a robust backend that Shopify apps can't provide.
Book a Call to Discuss
Package 3

eCommerce Engine

Starting at
$12,000 USD
// 8–12 weeks · + optional $2,000/mo retainer
  • Everything in Custom Backend Build
  • AI-powered automation (chatbots, document processing, smart notifications)
  • Multiple API integrations
  • Real-time analytics dashboard
  • Ongoing support & maintenance retainer
You want a complete custom platform that grows with your business.
Book a Call to Discuss

Every project starts with a free 30-minute strategy call. No commitments.

Case Studies

Real Projects. Real Results.

Retail / Distribution

WhatsApp Business API Integration

Challenge

Manual customer communication, slow response times.

Solution

Automated WhatsApp Business API integration with Django backend for document sending, template messages, and mass notifications.

Result

40% increase in closed quotes. Response time under 30 seconds.

Python Django WhatsApp Cloud API
Customer Service / SaaS

Real-Time Multichannel Chat Platform

Challenge

Fragmented customer conversations across multiple channels.

Solution

Custom chat center built with Django Channels, WebSockets and Redis for real-time message routing and automatic agent assignment.

Result

Centralized all customer communications. Zero messages lost.

Django Channels WebSockets Redis React
Finance / Operations

AI-Powered Document Processing

Challenge

Manual processing of invoices, contracts and PDFs consuming 15+ hours/week.

Solution

Intelligent document pipeline using AWS Textract + Claude API for automatic classification, data extraction and routing.

Result

15 hours of manual work eliminated per week. Zero calculation errors.

Python AWS Textract Claude API FastAPI
Fintech

Custom Lending Management System

Challenge

Complex loan calculations, extensions and PDF generation done manually.

Solution

Full-stack lending platform with React frontend and Django REST backend with automated financial calculations.

Result

End-to-end loan management. Automated PDF generation. Zero manual calculations.

React Django REST MySQL
eCommerce / Retail

eCommerce Platform with Payment Integration

Challenge

Needed a custom online store with local payment gateways and inventory management.

Solution

Complete eCommerce platform with Django backend, shopping cart, multiple payment gateways (PayU, Wompi, MercadoPago) and automated inventory.

Result

2× online sales in 3 months. 35% returning customers.

Django React PostgreSQL Stripe/PayU
Enterprise / Customer Service

AI Virtual Assistants & Chatbots

Challenge

24/7 customer support needed without scaling headcount.

Solution

AI-powered assistants using LangChain + AWS Bedrock for intelligent query classification, lead capture and automated ticket escalation.

Result

24/7 automated support. 120 inquiries/month processed without human intervention.

LangChain AWS Bedrock FastAPI Vector DB
Tech Stack

Built With Battle-Tested Technology

Backend

Python, Django, Django REST Framework, FastAPI, Celery

Frontend

React, Redux, HTML5, CSS3

AI & Automation

LangChain, AWS Bedrock, Claude API, OpenAI, n8n

Databases

PostgreSQL, MySQL, Redis, Vector DBs

Cloud & DevOps

AWS (EC2, RDS, S3, Textract), Docker, Kubernetes, CI/CD

APIs & Integrations

Stripe, Shopify API, WhatsApp Business, HubSpot, QuickBooks, Twilio

About

Why Companies Choose Me Over Agencies

  • You work directly with a senior developer, not a project manager who translates to juniors.
  • 11+ years building production systems — not tutorials, not side projects. Real business-critical software.
  • I deliver in phases: you see working code every week, not a big reveal after 3 months.
  • Clear pricing upfront. No scope creep surprises. No hourly billing games.
  • Based in Colombia (UTC-5) — aligned with US business hours, 60–70% more cost-effective than US agencies.

I'm Sergio Rueda, a fullstack developer based in Colombia with 11+ years of experience building custom software for businesses across Latin America and the US.

I specialize in Django backends, complex API integrations, and AI-powered automation for eCommerce companies. I've delivered 30+ production systems and I believe in writing clean, maintainable code that solves real business problems — not over-engineered solutions that look impressive but don't deliver ROI.

Process

How We'll Work Together

Free Strategy Call 30 min

We discuss your challenge, I ask the right questions, and we figure out if I'm the right fit.

Proposal & Scope 48 hours

You get a clear proposal with deliverables, timeline, and fixed price. No surprises.

Build in Sprints Weekly deliveries

I build in 1-week sprints. You see working software every Friday. Feedback loops keep us aligned.

Launch & Handoff Final week

We test together, deploy to production, and I hand off documentation + access.

Ongoing Support Optional

Monthly retainer for maintenance, updates, and new features as your business grows.

Let's Talk

Ready to Build Something That Actually Works?

Book a free 30-minute strategy call. No pitch, no pressure — just a senior developer listening to your challenge and telling you honestly if I can help.

Book Your Free Call

Prefer email? hello@sruedadev.com

Monday–Friday, 9 AM – 6 PM EST Reply within 24 hours