Development of Session Manager and network layer for integrations (asyncio, Curl_cffi, Redis)
579 USD 
A reliable session management and HTTP request layer with support for proxies and fingerprints is needed.
Goal:
A ready-made Session Manager that creates, stores, and rotates sessions by accounts, plus a basic network layer on curl_cffi. Delivered - when all tests pass, sessions are stored in PostgreSQL encrypted (AES-256-GCM), and integration tests with mocks show stable operation under 100+ parallel requests.
Tasks:
1. Design PostgreSQL models for storing sessions and proxies.
2. Implement SessionManager (asyncio) with sharding by account.
3. Integrate curl_cffi with automatic replacement of fingerprints and proxies.
4. Encrypt/decrypt sensitive data (cookies, tokens) AES-256-GCM.
5. Mechanism for proxy rotation and handling bans/captchas (stubs for events).
6. Idempotent requests with retries (exponential backoff).
7. Log network errors in MongoDB.
8. Unit and integration tests (pytest-asyncio) with 90% coverage.
9. Documentation for the API of SessionManager.
10. Deployment instructions in Docker.
Requirements:
Python 3.11+, asyncio, curl_cffi.
Experience with PostgreSQL + SQLAlchemy/Asyncpg.
AES-256-GCM encryption.
Working with proxies and fingerprints (basic level cloudflare bypass).
Idempotency and retries.
Parallel processing of 100+ requests without leaks.
A plus:
Experience bypassing anti-bot systems (curl_cffi browser impersonation).
Knowledge of cloudflare-turnstile bypass (working with ready-made solutions from git).
Experience with Redis for session caching.
CI/CD (GitHub Actions).
Timeline: 14 days, start immediately after approval.
If you are available and ready to work, please send your resume, we will consider it in order of receipt.
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