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SunVirgo

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Independent systems-focused engineer working on task-based and project-based network analysis and modification work.

My work centers on examining and modifying existing VPN and tunneling implementations to understand and validate how they behave across real ISP environments, especially under filtering, blocking, and non-ideal mobile network conditions.

I routinely work with large open-source codebases such as OpenVPN, WireGuard, SoftEther, and Psiphon, focusing on handshake flow, SNI placement, CDN-based fronting, and traffic visibility rather than application UI or product features.

My approach is empirical and hands-on: packet-level inspection (TLS / HTTP / WebSocket), controlled test setups, and direct validation on live networks using tools like Wireshark.

I engage selectively in short-term, scoped technical work where clear observation, practical modification, and explanation of real network behavior are required. I am not seeking full-time roles.

Selected work: https://sourceforge.net/projects/vpn-4g-ssl-tls-sni-vpngate/

Résumé: https://puzzle-cam.sourceforge.io/cv-HN-HR-v2-26.pdf

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Ask HN: Who is hiring? (January 2026) 7 months ago

Subject: Re: Durable Objects – Senior Systems Engineer

Hi Josh,

Thanks for sharing this. I’m very interested in the Senior Systems Engineer role on Durable Objects.

My background is in building and operating production distributed systems and backend services, with a strong focus on correctness, state management, failure handling, and observability. Stateful systems at scale are exactly the kind of problems I enjoy working on.

I’ll apply via the Greenhouse link, and happy to provide more context if helpful.

Best, Son Nguyen

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Ask HN: Who is hiring? (January 2026) 7 months ago

Subject: Intro Call – Senior AI / LLM Engineer

Hello Nishil Patel,

Thanks for the suggestion — I’m happy to schedule a short intro call.

I’ve selected *13:00* as the preferred time.

For context, I’m a senior backend/systems engineer with strong Python experience, currently focusing on building production LLM-powered systems for debugging, incident analysis, and developer tooling. I’m particularly interested in BetterBugs’ approach to understanding bugs through real execution context (logs, traces, user actions), rather than surface-level descriptions.

Looking forward to the conversation and learning more about your vision and current needs.

Best regards, Son

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Ask HN: Who is hiring? (January 2026) 7 months ago

Systems-focused backend engineer with deep experience in databases, sync/state management, and production infrastructure. Hands-on with SQLite, relational databases, replication-like workflows, and reliability under real-world constraints. Long-term open-source contributor, comfortable owning complex backend systems end-to-end.

Applied.

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Ask HN: Who is hiring? (January 2026) 7 months ago

Senior backend engineer with long-term experience building performance-critical, data-intensive systems and simulation backends. Strong in Python and C/C++, REST APIs, and handling real-time and historical data with an emphasis on correctness and determinism. Prefer working close to system behavior, data pipelines, and infrastructure rather than abstraction-heavy stacks. Applied

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Ask HN: Who wants to be hired? (January 2026) 7 months ago

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: https://puzzle-cam.sourceforge.io/cv-HN-v2-26.pdf, 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.

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