Backend Developer

Production-Ready Backend Development

Description:

I build scalable, secure REST APIs using Python's FastAPI framework backed by PostgreSQL. With 5+ years of backend development experience and production systems handling 3,500+ parcels/hour, I deliver clean, well-tested code that's built to last.

What You Get:

• • • 1. FastAPI Backend with async/await patterns
      2. PostgreSQL Database Design with proper normalization
      3.  SQLAlchemy ORM with Alembic migrations
      4.  Pydantic Validation for type-safe request/response
      5.  JWT Authentication with RBAC
      6.  Comprehensive Testing using pytest (80%+ coverage)
      7.  API Documentation (OpenAPI/Swagger)
      8. Docker Configuration for deployment

Technologies:

Python 3.10+

FastAPI

Pydantic v2

SQLAlchemy 2.x

PostgreSQL 14+

Redis

Docker

Pytest

Git

Linux

Recent Projects:

• Migrated MongoDB warehouse system to PostgreSQL handling 3,500+ parcels/hour
• Built real-time configuration API reducing deployment time by 80%
• Architected Redis caching layer improving response times by 30%

Perfect For:

• SaaS platforms
• startups building MVPs
• Companies migrating from legacy systems
• multi-tenant architecture projects

Pricing Packages:

📦 Basic API - $300 (7 days)

• 3-5 CRUD endpoints
• Basic PostgreSQL schema
• JWT authentication
• Pydantic validation
• API documentation
• Docker setup

📦 Standard API - $800 (20 days) ⭐ Most Popular

• 10-15 REST endpoints
• Complex PostgreSQL schema with relationships
• JWT auth + RBAC
• Advanced validation & error handling
• Pytest test suite (70%+ coverage)
• Redis caching integration
• Alembic migrations
• Full API documentation
• Docker Compose setup
• 2 rounds of revisions

📦 Premium API - $1,500 (30 days)

• 20+ REST endpoints
• Advanced database design with optimization
• Complete auth system (JWT, refresh tokens, RBAC)
• Background job processing (RabbitMQ)
• Comprehensive testing (85%+ coverage)
• Redis caching + session management
• SMTP integration
• Database performance tuning
• Full documentation + deployment guide
• 3 rounds of revisions
• 30 days post-delivery support

Add-ons:

• Third-party API Integration - $100
• WebSockets - $200
• Monitoring (Grafana/Prometheus) - $200
• Additional Endpoints - $50 each
• Extended Support - $400/month

FAQ:

Q: Do you provide source code?A: Yes, full source code with documentation and deployment instructions.

Q: What if I need changes after delivery?A: Minor fixes included for 14 days. Feature additions handled as new projects or add-ons.

Q: Can you work with my existing database?A: Yes! I can integrate with existing PostgreSQL databases or migrate from other systems.

Q: Do you sign NDAs?A: Absolutely. Confidentiality is standard practice.

Q: What about ongoing maintenance?A: Monthly retainer packages starting at $400/month for maintenance and feature additions.

Why Work With Me:

✅ Production Experience - Real systems at scale, not tutorials

✅ Clean Code - SOLID principles and best practices

✅ Test-Driven - Comprehensive pytest suites included