Senior Backend / Architect — Development of High-Load SaaS CRM (AdTech: Crypto/Forex/iGaming)

We are creating a licensed self-hosted product (SaaS) for automation, routing, and validation of traffic in highly competitive verticals (Fintech, iGaming, Nutra). This is not a regular CRM for managers. This is a high-speed Traffic Distribution System (TDS) with modules for autologin, cascading routing, and traffic simulation.

I need a Senior Backend Developer or a cohesive team/agency capable of designing the architecture from scratch, handling high loads, and ensuring impeccable data security.

⛔️ I warn you right away:

If your main experience is Telegram bots, online stores, WordPress, or parsing basic websites — do not waste your time and mine. Your bid will be rejected. I need an engineer who understands network protocols, HTTP-Spoofing, Connection Pooling, and data isolation.

🧩 Core modules of the system (MVP):

* Intake API & Validation: High-load gateway for receiving leads. Validation (SMTP ping, MX check), checking IP / GEO / Device fingerprints. Basic anti-fraud.

* Smart Routing: Cascading routing to brokers/partners (A → B → C). Distribution by GEO, payout, statuses. Support for CPA, CPL, CPA+CRG models.

* High-Load S2S Proxy & Autologin: The server intercepts the native JIT form from the donor and under the hood makes an S2S POST request to the broker's API (Trackbox, Alfa CRM, etc.), mimicking the fingerprints of a real user (Spoofing). After the broker's response — instant HTTP 302 Redirect.

* Replay Engine: Scheduler for sending databases (cron/timers), support for rotating residential proxies, emulation of live traffic.

* SaaS Billing & Multi-Tenancy: Licensing (keys/domains). Billing panel with payment in USDT (crypto processing). Complete data isolation between tenants (RLS in PostgreSQL).

⚙️ Technical requirements:

* Stack: Python (FastAPI/Asyncio).

* Databases and cache: PostgreSQL, Redis.

* Infrastructure: Docker, CI/CD on GitHub, strict repository structuring.

* Security: Zero-leak policy, HMAC, absence of default server headers in S2S requests.

In your response, please also briefly indicate your experience in the Affiliate/CPA niche, estimated timelines for MVP implementation, and your rate/budget.