Senior Software Engineer - Browser

Role Description

We’re looking for a Senior Software Engineer to join our Stealth & Reverse Engineering team—the elite force responsible for making our headless browsers and traffic completely undetectable by modern anti-bot systems.

• Own and evolve our custom fork of Chromium, continuously identifying and patching all behavioral and fingerprinting vectors that reveal automation.
• Go deep into browser internals, reverse engineer anti-bot defenses, and create a fully cloaked browsing experience across real-world targets.
• Build internal tools that detect, analyze, and resolve JavaScript-based bot challenges (like fingerprinting, integrity checks, proof-of-work, and obfuscation traps).
• Help automate evasions across our infrastructure.

This is a deeply technical, adversarial, and high-leverage role at the heart of what makes our scraping infrastructure world-class.

We’re a remote-first company with a fast-paced, high-impact culture. In this role, you’ll work closely with our CEO, Aurken, and our Director of Engineering.

Qualifications

• 5+ years of software engineering with a focus on browsers, reverse engineering, or automation in adversarial environments.
• Fluency in C++ and JavaScript (Node or browser), with ability to write clean, testable low-level code.
• Deep understanding of Chromium internals: Blink, V8, DevTools Protocol, browser architecture, etc.
• Proven experience patching Chromium or building hardened browser automation setups (e.g., stealth plugins, puppeteer-core forks).
• Advanced knowledge of JavaScript fingerprinting, detection vectors, and browser inconsistencies.
• Familiarity with anti-bot vendors like PerimeterX, Datadome, Kasada, Akamai Bot Manager, and FingerprintJS.
• Strong debugging and tooling skills: Chrome DevTools, Wireshark, mitmproxy, Frida, Objection, or similar.
• Experience automating evasion workflows and detection pipelines is a major plus.
• Excellent communication skills, with the ability to convey complex technical concepts to non-technical stakeholders.

Requirements

• Be the team’s go-to expert in browser internals, bot detection evasion, and security-focused reverse engineering.
• Mentor engineers in topics like V8 internals, JS fingerprinting, and browser automation stealth.
• Help define our long-term strategy around browser-level evasion and undetectable scraping at scale.

Benefits

• 100% remote work: We are a company that offers true freedom. Work wherever life takes you.
• The salary you are worth: We never ask people what they are earning, but instead what they are looking for.
• The equipment you want: We believe in giving our people the tools they need to succeed.
• Generous Learning & Development budget: We believe in always adding value to our top performers.
• All-Star Awards: We recognize achievements in many ways within the business.
• BitWarden Account: We empower employees with tools to keep passwords secure.
• Charity Initiatives: We believe in giving back to the community.
• Annual Kick-Off: We want our employees to see where ZenRows was born.
• Share in Our Success: We offer opportunities for stock option allocation.
• Deel Benefits: We employ our people via Deel, bringing freedom of location and many other benefits.