You will get Legacy Code Modernized and Refactored Into a Clean Modern Stack
Project details
Most dev shops want to rewrite your whole app from scratch. Six months. $50k. A team of four.
You don't have to do that.
Your app works. It just feels old. New features take forever. Bugs come back. Hiring developers is hard because nobody wants to touch the code. Every change feels risky.
I fix that — without rewriting your app.
What you walk away with:
• An app that's fast, stable, and easy to add features to
• Code any modern developer can pick up tomorrow
• The same app your users know — nothing breaks
• Tests that catch bugs before your users do
• A real handoff: docs, walkthrough video, roadmap
What I commonly fix:
• Old apps built years ago that nobody wants to touch
• Sites that crash, lag, or feel "stuck"
• Codebases too messy to add AI or new features to
• Apps where the original developer left and nobody understands the code
• WordPress sites that need to scale beyond WordPress
How I work:
• Daily progress updates in plain English
• Nothing goes live until you approve it
• No ghosting, ever
• Fixed price, fixed timeline, no surprises
Pick the tier that fits your project. I'll review it with you before any work starts.
You don't have to do that.
Your app works. It just feels old. New features take forever. Bugs come back. Hiring developers is hard because nobody wants to touch the code. Every change feels risky.
I fix that — without rewriting your app.
What you walk away with:
• An app that's fast, stable, and easy to add features to
• Code any modern developer can pick up tomorrow
• The same app your users know — nothing breaks
• Tests that catch bugs before your users do
• A real handoff: docs, walkthrough video, roadmap
What I commonly fix:
• Old apps built years ago that nobody wants to touch
• Sites that crash, lag, or feel "stuck"
• Codebases too messy to add AI or new features to
• Apps where the original developer left and nobody understands the code
• WordPress sites that need to scale beyond WordPress
How I work:
• Daily progress updates in plain English
• Nothing goes live until you approve it
• No ghosting, ever
• Fixed price, fixed timeline, no surprises
Pick the tier that fits your project. I'll review it with you before any work starts.
Web Programming Project
API Development, API IntegrationProgramming Languages
PHP, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$300
|
Standard
$900
|
Advanced
$2,000
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 21 days |
Number of Revisions | 2 | 3 | 4 |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$100 - $200Frequently asked questions
About Nicolas
AI Engineer | Voice Agents, n8n Automation, RAG & AI SaaS
Medellin, Colombia - 4:05 pm local time
WHAT I BUILD:
- AI Voice Agents — 24/7 call answering, booking, and lead qualification (Vapi, Retell, Twilio)
- AI Agents & Automations — custom agents on n8n, Make, and raw Claude/OpenAI APIs
- RAG Systems — chat with your company docs, internal knowledge bases, support copilots
- AI-Powered SaaS — full-stack web apps with Claude/GPT built into the core workflow
- Workflow Automation — connect your CRM, email, Slack, calendar, and tools into one system
RECENT WORK:
• 24/7 AI voice agent that answers calls and books appointments for a service business
• Two-sided marketplace with Stripe Connect, geolocation matching, and worker verification
• Cross-platform mobile app for a K-12 school district (React Native, COPPA-compliant, offline sync)
STACK: Claude, OpenAI, n8n, Make, Vapi, Retell, Twilio, React, Next.js, React Native, TypeScript, Supabase, Stripe, Vercel.
WHY CLIENTS HIRE ME:
- 6 years in B2B sales before this — I build AI that actually moves revenue, not demos
- Bilingual English/Spanish — fast timezone overlap with US, EU, and LATAM clients
- Business-first thinking — I flag issues before they get expensive and push back when something isn't the right call
- Daily updates so you're never guessing. Fast iteration, real feedback loops.
Send a message and tell me about your project. I'll be straight with you about whether I'm the right fit.
Steps for completing your project
After purchasing the project, send requirements so Nicolas can start the project.
Delivery time starts when Nicolas receives requirements from you.
Nicolas works on your project following the steps below.
Revisions may occur after the delivery date.
Codebase Audit & Migration Plan
I review your code, map dependencies, flag risks, and deliver a written migration blueprint: what gets refactored, in what order, and how we avoid breaking production.
Refactor in Small, Tested Chunks
I work in small commits with tests. You review each chunk in GitHub before it merges. Nothing breaks, nothing surprises you, and you see progress daily.