[Hiring] Senior Web Browser Researcher @Fingerprint

Role Description

We are looking for a Senior Web Browser Researcher to push the accuracy and stability of Fingerprint's core identification and fraud-detection products. You'll independently discover, validate, and drive to production new device-identification and bot-detection techniques in modern web browsers — owning findings from first signal through engineering implementation.

• Independently research novel device-identification, visitor-identification, Smart Signals, and bot-detection techniques across modern browsers, thriving where requirements are not fully defined.
• Own findings end to end: assess whether a signal is genuinely actionable within real-world constraints (performance budget, execution context, same-site and proxy implications, interaction with existing signals), back the assessment with data, and deliver a clear recommendation with impact estimates (expected false-positive/false-negative rates, expected improvement, limitations, and trade-offs) that product and engineering can act on.
• Stay engaged through implementation — review engineering's changes against the research intent, answer questions as they surface, and advise on edge cases the write-up couldn't fully specify.
• Build and maintain research tooling (observers, fuzzers, scrapers) that surfaces new signals and detects browser platform changes automatically, rather than relying on manual investigation.
• Track browser changes ahead of release — following beta/canary/dev channels and spec/RFC discussions — and translate them into product impact and action.
• Produce and share structured, actionable research articles and outputs — internal write-ups, articles for product and engineering, proofs of concept, and experimental signal implementations with their analyses — written so partners can act on them directly.

Qualifications

• Deep understanding of web platform fundamentals, browser internals, and web security concepts.
• Strong proficiency in JavaScript, and the ability to read, comprehend, and navigate code across multiple programming languages.
• Solid grasp of web networking fundamentals.
• Proven ability to uncover and explain undocumented behavior of web technologies, APIs, and protocols through testing, debugging, and reverse engineering — researching in depth without leaving blank spots.
• Track record of independently driving research from idea to a validated, actionable result, including designing and running experiments against real traffic and analyzing large-scale data.
• Recognized depth in at least one area (e.g., reverse engineering, network-related research, or identification), with working breadth across adjacent areas.
• Clear communication of findings, impact, and trade-offs to engineering and product partners.

Requirements

• Experience building research and automation tooling (scrapers, fuzzers, observers).
• Track record of submitting issues to Chromium, Firefox, or WebKit bug trackers.
• Experience and interest in backend development (we use Go at Fingerprint).
• Familiarity with anti-fingerprinting approaches and how they are applied across browsers and extensions.
• A public research footprint — conference talks, blog posts, CVEs, or open-source contributions.

Benefits

• At Fingerprint, we believe in pay transparency — it's part of how we operate as a distributed, remote-first team. Salaries are based on function, level, and geographic location, benchmarked against similar stage growth companies.
• Salary range: $174k - $235k based on geographic location.
• Example salaries for specific locations:
  • NYC: $204k - $235k
  • Chicago: $174k - $200k
  • London: $143k - $165k
• Final offer amounts are determined by multiple factors, including the successful candidate's location, experience, and expertise, and may vary from the amounts listed above.