Senior Software Engineer

Twilio is a company focused on shaping the future of communications by delivering innovative solutions to businesses and empowering developers worldwide. They are seeking a Senior Software Engineer to develop Stytch’s fraud detection and prevention products, working on device fingerprinting to protect customers from fraud and abuse. The role involves collaborating with product and engineering leadership to evolve detection techniques in a startup-like environment within Twilio.

Responsibilities:

• Build and own fraud detection capabilities for Stytch’s fraud platform on Twilio—go deep on browser and device internals for complex signal collection to improve identification of bad actors and keep our customers safe
• Partner with Product and Engineering leadership to set direction, translate customer needs into technical plans, and deliver high-impact roadmap features
• Collaborate across Twilio and Stytch teams to align on architecture, integrate platform capabilities, and unblock cross-team initiatives
• Operate with deep technical ownership: author design docs, drive key technical decisions, review code, and stay close to the systems you ship
• Build in ambiguity—break down complex problems, make pragmatic tradeoffs, and adopt new technologies or strategies when they improve outcomes
• Improve production quality and resilience through strong observability, incident response and remediation
• Mentor and support other engineers through pairing, feedback, and knowledge-sharing, helping raise the team’s technical bar and culture

Requirements:

• 6+ years experience in designing, building and operating production systems
• Familiarity with C/C++, production experience not necessary
• Familiarity with a production-grade code base in a modern programming language, applying best practice coding standards and writing high quality code
• Bachelor's degree in Computer Science or related industry experience
• Excellent written and verbal communication skills
• Schedule: ability to work non-standard, on-call rotation weekend and holiday hours
• Familiarity with Javascript, Go, WebAssembly
• Experience with reverse engineering and/or reverse engineering detection and prevention such as experience with browser automation, botting, and/or fraud detection and defense techniques
• Offensive and/or defensive security software engineering experience
• Builder at heart. Through a hobby or your profession, you are passionate about being hands on and seeing your work come to life