Comment by SunVirgo

Location: Hanoi, Vietnam (UTC+7)

Remote: Yes (async / contract-friendly)

Willing to relocate: No

Technologies: C/C++, Go, Java, Linux, networking, security, VPN/proxy systems

Résumé/CV: Available on request, https://puzzle-cam.sourceforge.io/

Email: luongson9973@gmail.com

SourceForge (production VPN/tunneling apps, global users): https://sourceforge.net/projects/vpn-4g-ssl-tls-sni-vpngate/

Additional academic / crypto work available on request.

Independent systems-focused software engineer, working in IT since the mid-1990s, with strong background in networking, security, and low-level infrastructure.

I design, build, and operate my own production-grade networked applications end-to-end: VPN/proxy systems (OpenVPN, WireGuard, HTTP/SOCKS, TLS/SNI, domain-fronting), mobile networking stacks, and backend services under real-world ISP and platform constraints, used by real users worldwide: https://sourceforge.net/projects/vpn-4g-ssl-tls-sni-vpngate/

I’ve implemented cryptographic algorithms from scratch for validation, and use well-established crypto libraries in production with a clear understanding of their guarantees and failure modes.

Comfortable with deep debugging, modifying large open-source tunneling codebases, and fully remote, self-directed work.