Senior Backend Engineer, Detection

About the Role

As a Senior Backend Engineer on our Detection team, you will develop, support, and maintain the core hCaptcha application tools and services that detect and verify user events. You will work closely with Security and Machine Learning engineers to continuously build features that improve hCaptcha's capabilities by leveraging languages such as JavaScript and or Go to solve problems that impact users on a global scale.

What You Will Do

• Collaborate with team members and domain experts to execute on solutions that directly impact the ability to detect and mitigate fraud and automation.
• Design and implement features that aim for low-latency, high-availability, transparent performance insights.
• Write clearly structured, maintainable, well-documented, and tested code that meets open-source quality standards.
• Support engineering excellence through code reviews, test automation, and on-call participation.

What You Will Learn

• Experience working with systems that serve hundreds of millions of daily users.
• Security and Machine Learning expertise through product development and company knowledge sharing.
• Cutting-edge technology to be leveraged in solutions to combat the ever evolving cybersecurity landscape.

What We Are Looking For

• 4+ years of hands-on experience in backend engineering roles.
• Proven experience building scalable solutions with JavaScript and/or Go.
• Expertise in Web APIs, HTTP, SSL, and database management.
• Strong background with serverless and containerization architectures.
• Proficiency in network protocols and distributed systems.

Nice to Have

• Production experience with Python and Rust or Go.
• Knowledge of security frameworks (OWASP, CISA), attack vectors, botnets, etc.
• Experience working across infrastructure such as developing CI/CD pipelines, metrics-driven deployments, managing system resources, etc.

What We Offer

• Fully remote position with flexible working hours.
• An inspiring team of colleagues spread all over the world.
• Pleasant, modern development and deployment workflows: ship early, ship often.
• High impact: lots of users, happy customers, high growth, and cutting edge R&D.
• Flat organization, direct interaction with customer teams.
• We celebrate equality of opportunity and are committed to creating an inclusive environment for all team members.