High-Performance Technical Lead

About the Role

We are looking for a seasoned professional to lead our high-performance IT department and oversee the end-to-end architecture, performance, and reliability of a top-tier domain drop-catching system.

• This is a hands-on leadership role at the CTO level – you will be responsible for designing ultra-high concurrency systems, leading a specialized technical team, and ensuring our global drop-catching success rate remains in the top 3 worldwide.

Job Responsibilities

1. Develop and maintain the domain drop-catching system, ensuring stable operations and maintaining a global top 3 success rate.

• Define optimization plans for the drop-catching process, obtain company approval, and implement them smoothly.
• Monitor daily drop-catching performance, analyze logs, and report on system status and planning.
• Conduct eBPF kernel performance inspections and submit optimization patches to improve system infrastructure.
• Organize cross-departmental requirement meetings on the user side, confirm solutions, and prioritize tasks.
• Write core user-side code, confirm logic, and audit project code.
• Develop, maintain, and optimize the EPP system; implement ICANN-related changes promptly to ensure the domain business process is compliant and orderly.
• Establish training and succession plans for project team members and list actionable steps for implementation.
• Ensure zero major security incidents for all online projects daily and pass all security audits.
• Oversee routine inspection and maintenance of all project servers, architecture, and applications.
• Assign work to staff and perform other management tasks.
• Handle other ad-hoc technical matters.

Requirements

1. Over 10 years of backend high-concurrency systems, architecture, and technical management experience, with at least 5 years focused on the domain industry (DropCatch, Backorder, WHOIS, EPP, DNSSEC).

• Personally designed and deployed a domain drop-catching or similar real-time bidding system with a peak 100,000 QPS; able to provide real peak load screenshots.
• Deep understanding of the TCP/IP protocol stack; capable of tuning architecture in C language from setsockopt to TCP_FASTOPEN; familiar with Linux Kernel 6.x networking subsystem code.
• Proficient in PHP (PHP-FPM/ZTS/Swoole), Java (Netty/JDK 21), and C (epoll/io_uring/eBPF) development; able to deliver the same functionality in all three languages within the same week as a PoC.
• Experience integrating with EPP/RDE/RSNG interfaces of global registries (Verisign, PIR, Donuts, CNNIC, etc.); familiar with all error codes and retry strategies.
• Experience in technical forensics for domain disputes (UDRP/URS/CCPS); able to locate and recover a maliciously transferred domain within 2 hours.
• Proven ability to maintain microsecond-level global top 3 drop-catching success rate; able to locate core system issues and faults within 10 minutes (24/7 response required). Due to the special timing of drop-catching, working hours are from afternoon until early morning; must be on-site during drop-catching hours (02:00–04:00, SGT) to handle issues and optimize processes.
• Skilled in training LSTM models on WHOIS changes, DNS query frequency, and registry SRS logs to predict domain deletion times 30 seconds in advance with 5 ms error.
• Developed an “automatic root cause attribution” system for failed drop-catches, identifying issues (e.g., network jitter, registry rate-limiting, expired certificates, or premium domain policy changes) within 3 seconds.
• Designed a “TCP backpressure circuit breaker” mechanism: automatically downgrade to a backup line when RTT spikes by 20%, ensuring no drop in success rate.
• Full black-box and white-box reverse engineering capabilities for all backend user-side systems outside of drop-catching.
• Ability to assess product, operations, and user requests, produce technical implementation plans, deploy new features quickly, ensure zero-risk code, and meet logical requirements.
• Persumably built a technical team of 10+ members (backend, SRE, kernel, security, data) from scratch, maintaining zero-fault releases of core systems.
• Degree in Computer Science or related field.
• Proficient in Chinese language for key stakeholder communication.