Browse categories
Explore
Fiverr Pro
English
$
USD
I will build python fastapi backend rest api and webhook automation
Alex Nexus
About this gig
NEED A HIGH-SPEED, SCALABLE BACKEND OR SEAMLESS API INTEGRATION?
Slow APIs and poorly optimized backends hurt your business efficiency. If you need a robust server architecture, high-performance webhooks, or custom microservices that can process data instantly and asynchronously, you need an elite developer setup.
I am a backend specialist engineering high-speed, clean, and scalable REST APIs using Python and FastAPI.
---
️ WHAT SERVICES I OFFER:
Custom REST API Development using FastAPI for lightning-fast asynchronous execution.
Webhook Automation & Processing (Connect and synchronize data between software, CRMs, or automation loops).
Database Integration (Secure CRUD operations with PostgreSQL, MySQL, MongoDB, or serverless DBs).
Secure Authentication (JWT Tokens, API Keys, and role-based route protection).
Refactoring & Optimization: Transforming slow, legacy Python code into blazingly fast asynchronous systems.
---
WHY WORK WITH ME?
Clean Production Architecture: I follow strict modular layouts and industry-standard clean design principles.
Performance-First Mindset: I optimize data models, routing tables, and server states to reduce execution overhead.
Get to know Alex Nexus
Alex Nexus
AI Automation and Private LLM Expert
- FromRomania
- Member sinceApr 2026
- Avg. response time2 days
Languages
English, Romanian
I specialize in building advanced AI automations and custom Python scripts for businesses. What sets me apart is my focus on Privacy and Security. I operate specialized local LLMs (Large Language Models), meaning your sensitive business data is processed 100% offline and never uploaded to public clouds like ChatGPT. From developing intelligent chatbots to complex data analysis and system automation, I deliver high-quality, secure solutions tailored to your specific workflow.
FAQ
Why do you use FastAPI instead of other Python frameworks?
FastAPI is one of the fastest Python frameworks available, built on modern asynchronous standards (ASGI). It handles concurrent requests smoothly, reduces server overhead, and automatically generates interactive API documentation (/docs) out of the box.
Can you integrate third-party services like Stripe, Shopify, HubSpot, or custom CRMs?
Yes! I specialize in building custom webhook receivers and secure integration points. I can map incoming payloads, handle authentication headers, and ensure data flows perfectly between your systems asynchronously.
Will the API be secure and production-ready?
Absolutely. For the Standard and Premium packages, I implement security best practices, including OAuth2 with JWT token authentication, secure password hashing, role-based route access, and clean environment variable isolation.
Do you provide database integration for the endpoints?
Yes. I can securely wire your FastAPI backend to any SQL database (PostgreSQL, MySQL, SQLite) or NoSQL database (MongoDB, Redis, LanceDB) using optimized connection pools and ORMs like SQLAlchemy or Tortoise ORM.
