You will get a production-ready SaaS backend or automation with FastAPI
Project details
I build production-ready SaaS backends and automation systems using FastAPI and modern APIs.
This project is ideal for founders and teams who need a real backend—not a demo. I focus on clean architecture, secure API integrations, OAuth, background jobs, and scheduling logic that runs reliably without constant maintenance.
You’ll get a scalable backend foundation you can build on, with clear scope, automation-first design, and source code ownership.
This project is ideal for founders and teams who need a real backend—not a demo. I focus on clean architecture, secure API integrations, OAuth, background jobs, and scheduling logic that runs reliably without constant maintenance.
You’ll get a scalable backend foundation you can build on, with clear scope, automation-first design, and source code ownership.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$100
|
Standard
$150
|
Advanced
$350
|
|---|---|---|---|
| Delivery Time | 7 days | 15 days | 20 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 1 | 1 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$80 - $120
Additional Revision
+$50Frequently asked questions
About Jerson
AI Integration Engineer | Production-Grade Backends & Fintech Systems
Mexico City, Mexico - 2:09 am local time
bought the AI tools but can't get them reliably into production. That's the gap I close.
I'm an AI Integration Engineer. I take LLM/AI features and backends from "works on my
machine" to production-grade: reliable, secure, monitored, and trustworthy with real
users — or real money — on the line.
What I do:
• AI / LLM integration — wire OpenAI/Claude into your product with guardrails,
structured output, and fallbacks. Not a demo; something that holds up.
• Production-grade backends — FastAPI, PostgreSQL, async workers, APIs, Stripe
payments, real-time data (WebSockets).
• Rescue & hardening — inherited a broken or AI-built MVP? I fix what's unreliable,
insecure, or won't scale.
• Fintech & high-stakes systems (specialty) — where being wrong costs money.
Proof (built solo, end-to-end):
• A 5-layer real-time crypto trading system on OKX running 24/7 — and when I tested a
Claude AI filter inside it, I measured that it added no value and removed it. I make
AI calls with data, not hype.
• Scripty — an AI app generating structured content via the Claude/DeepSeek APIs.
• Klipzy — a SaaS auto-publishing video to YouTube & TikTok (OAuth, async workers, Stripe).
How I work:
• I tell you the truth about your system — including what to cut.
• Clean, documented, tested code. Daily updates. I don't disappear.
Tech: Python, FastAPI, OpenAI/Claude APIs, PostgreSQL, Redis, Docker, REST & WebSocket
APIs, Stripe, Next.js/TypeScript.
Newer on Upwork, not new to hard systems. For the right project I'll go deep and
over-deliver to earn that first review. Tell me what's at stake.
Steps for completing your project
After purchasing the project, send requirements so Jerson can start the project.
Delivery time starts when Jerson receives requirements from you.
Jerson works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements & scope confirmation
Review project requirements, clarify scope, integrations, and confirm delivery plan.
Backend & automation implementation
Build backend logic, APIs, auth, integrations, and background jobs according to the agreed scope.