Senior JavaScript Engineer

You will drive the design, development, and optimization of advanced JavaScript techniques to collect signals such as user behavior, device characteristics, and browser APIs securely and efficiently. You will own the full code lifecycle including architecture, development, deployment, monitoring, and continuous improvement. You will collaborate closely with Product, Research, Security, and Engineering teams to align your technical execution with broader product goals, pushing the boundaries of real-time, client-side and backend development.

Responsibilities

• Drive the design, development, and optimization of advanced JavaScript techniques to collect signals securely and efficiently
• Own the full code lifecycle: architecture, development, deployment, monitoring, and continuous improvement
• Collaborate closely with Product, Research, Security, and Engineering teams to align technical execution with broader product goals

Requirements

• 4+ years of hands-on software development experience, with deep expertise in vanilla JavaScript and browser internals
• Strong understanding of web security concepts, browser APIs, and the nuances of cross-platform development
• A JavaScript enthusiast who enjoys being hands-on: reviewing code, setting architecture and contributing to complex solutions
• Experience with typed backend languages (e.g., Go, Java)
• Excellent communication and collaboration skills, with the ability to work effectively across disciplines
• Passionate about performance, security, and crafting elegant technical solutions
• Familiarity with content delivery networks (CDNs) and large-scale deployment strategies
• Background in cybersecurity, bot mitigation, or fraud prevention technologies

Benefits

• Well-being and learning stipends
• Flexible work options
• Dedicated time off