Senior Backend Infrastructure Engineer (Anti-Bot)

About the Role

Build and operate backend infrastructure for a SaaS web data extraction platform. You will work on the proxy and browser systems that help maintain reliable extraction from websites with evolving anti-automation defenses.

What You'll Do

• Architect and manage proxy rotation, IP and session management, and isolated egress nodes at scale.

• Improve extraction reliability against anti-bot and anti-scraping defenses.

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

• Monitor the health and cost efficiency of the proxy layer.

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

• Own systems end to end, including production operations and reliability.

What We're Looking For

• More than 3 years of experience in adversarial web infrastructure or proxy-layer engineering.

• Recent, hands-on experience building web extraction infrastructure and bypassing anti-bot defenses at production scale.

• Production experience architecting proxy rotation, IP and session management, egress isolation, and proxy economics for third-party web extraction.

• Experience managing browser or TLS fingerprints and CAPTCHA or challenge handling at scale.

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

• Experience owning production systems, participating in on-call, and implementing observability with tools such as Prometheus and Grafana.

Compensation & Benefits

Annual salary: $235,000 to $260,000 USD. Visa sponsorship is available.

Location

Hybrid role based in San Francisco, California, United States.