Software Engineer, Anti-Adblock

Job Description

This role is preferred on-site in NYC, but the team is open to more Sr candidates that lives within the continental US.

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About Ad-Shield

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Billions of ad impressions disappear every day because of ad blockers, destroying over $200B in publisher revenue annually. Ad-Shield builds next-generation adblock recovery technology that helps publisher restore this lost revenue and turn blocked traffic into a sustainable revenue channel.

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We are one of the fastest-growing teams in global ad-tech. With a lean, high-leverage team, we generate millions of dollars in revenue per employee and are scaling an 8-figure net revenue portfolio toward 9-figure potential.

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About the Role

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We are looking for a software engineer to work on our anti-adblock systems. You will investigate new blocking behavior, reproduce failures, and build reliable solutions across our runtime, delivery, detection, and edge systems.

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The work combines technical research with production engineering. The goal is to turn individual incidents into product improvements that work across publishers, rather than apply one-off patches. Prior anti-adblock experience is not required.

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What You Will Do

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• Investigate new blocking behavior across browser extensions, filter rules, scriptlets, browser APIs, and network-level tools.
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• Build and improve the runtime, script delivery, detection, fallback, and edge systems behind our product.
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• Own problems from reproduction and root-cause analysis through implementation, rollout, and verification.
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• Turn recurring failures into reusable defenses, regression tests, monitoring, and safer rollout practices.
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• Define and track reliability metrics such as coverage, false positives, page integrity, and time to detection and recovery.
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Qualifications

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• Strong software engineering fundamentals and the judgment to work independently in unfamiliar codebases.
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• Strong JavaScript or TypeScript skills and a solid understanding of browsers, the DOM, networking, caching, and CDNs.
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• Strong debugging and research skills. You can reproduce inconsistent behavior, inspect runtime and network state, and test hypotheses with evidence.
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• A systems mindset, with attention to observability, failure modes, regression prevention, and rollout safety.
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• End-to-end ownership from research and technical design through implementation, deployment, monitoring, and retrospective improvement.
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Nice to Have

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• Experience with browser internals, browser extensions, or content-filtering technologies such as CSP, Service Workers, filter rules, or scriptlets.
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• Experience with reverse engineering, security research, anti-tampering, or other adversarial systems.
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• Experience with Cloudflare Workers, CDNs, edge computing, or high-traffic web infrastructure.
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• Experience with browser automation, E2E testing, monitoring, or incident response.
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• Familiarity with GAM, Prebid, header bidding, IVT, consent platforms, or publisher monetization.
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