Backend Infrastructure Engineer, Anti-Bot

About the Role

Join the infrastructure team at a B2B web data extraction SaaS company, building systems that keep high-volume extraction reliable against websites with sophisticated anti-automation defenses. You will own production infrastructure end to end and help ensure web data remains accessible to AI applications.

What You'll Do

• Architect and operate proxy rotation, IP and session management, and isolated egress infrastructure at scale.

• Improve extraction success rates against aggressive anti-bot and anti-scraping defenses.

• Build and maintain browser and TLS fingerprint management, along with CAPTCHA and challenge-solving infrastructure.

• Monitor proxy-layer health and optimize its cost and operational efficiency.

• Diagnose intermittent failures across the stack and deliver lasting production fixes.

What We're Looking For

• More than 3 years of experience in adversarial web infrastructure, proxy-layer engineering, or web data extraction, including recent hands-on production work.

• Experience operating proxy rotation, IP and session management, egress isolation, and proxy economics for third-party web extraction.

• Production experience bypassing major anti-bot defenses and owning extraction success-rate metrics, as well as browser or TLS fingerprinting and CAPTCHA or challenge handling.

• Proficiency with Go and/or Python, plus networking fundamentals such as TCP/IP, HTTP/2, connection pooling, and proxy orchestration.

• Experience owning production systems end to end, including on-call responsibilities and observability tools such as Prometheus and Grafana.

• A practical, reliability-focused approach to complex adversarial systems, with a bias toward shipping, measuring, and iterating.

Compensation & Benefits

Base salary: $235,000 to $260,000 annually. Visa sponsorship is available.

Location

Hybrid role based in San Francisco, California.