Network Fingerprinting Evasion Expert (JA3/JA4, TLS, HTTP, TCP/IP)

We’re looking for a highly skilled network protocol and traffic fingerprinting expert to help us bypass JA3/JA4 detection methods across various layers (TCP/IP, TLS, HTTP). This is a specialized consulting role for someone deeply familiar with passive fingerprinting techniques and how to defeat them.

🧠 What You’ll Do:

Analyze our current fingerprint (JA3, JA4L, JA4H, JA4X) and propose hardening techniques.

Implement TLS stack spoofing using uTLS, OpenSSL, or other libraries.

Tune HTTP header order/casing to evade JA4H fingerprints.

Modify TCP/IP-level behavior to avoid JA4X detection (window size, MSS, options).

Build or configure proxy relays/middleboxes that rewrite TLS handshakes.

Simulate or route traffic through real browser environments (headful or mobile).

Optionally: Implement stealth automation using Playwright or Puppeteer + stealth techniques.

✅ Skills & Requirements:

Proven experience defeating JA3/JA4 or similar detection methods.

Deep knowledge of TLS handshakes, cipher suites, extensions.

Familiar with TCP/IP fingerprinting techniques.

Experience with Go (uTLS), Python (mitmproxy, scapy), or C/OpenSSL.

Familiarity with fingerprinting datasets (e.g. fingerprintjs, Splunk JA4 datasets).

Bonus: Familiarity with anti-bot detection systems (Cloudflare, Akamai, DataDome, etc.).

💻 Tools You Might Use:

uTLS (Go)

mitmproxy

Tcpreplay / Scapy

curl + custom OpenSSL

🎯 Project Scope:

We are building an application that needs to blend in with normal consumer traffic to avoid detection or fingerprinting. This is not for malicious purposes — it is for ensuring traffic privacy and obfuscation under surveillance-heavy conditions.

🕒 Engagement:

Initial contract with potential for longer-term collaboration.

Flexible hours, async-first communication.

We can move fast if you’re available immediately.

🚀 Apply If You:

Have bypassed or neutralized fingerprinting systems in production.

Understand the internals of TLS and HTTP at the protocol level.

Think like a network defender — and know how to stay a step ahead.