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🌐 Remote💼 Full-time🗓 2026-06-25 → 2026-09-05

Core

Develop, support, and maintain core hCaptcha application tools and services that detect and verify user events to mitigate fraud and automation.

Role type

Senior Backend Engineer (Security/Detection)

Builds

hCaptcha security suite features and services

Domain

Cybersecurity, Fraud Detection, Distributed Systems

Deliverable

production ML models | product features

Required skills

Backend engineering, JavaScript, Go, Web APIs, HTTP, SSL, Database management, Serverless architectures, Containerization, Network protocols, Distributed systems

Preferred skills

Python, Rust, Security frameworks (OWASP, CISA), Botnet mitigation, CI/CD pipelines, Metrics-driven deployments

Technologies

JavaScript, Go, hCaptcha

Responsibilities

Collaborate with Security and ML engineers to build fraud detection features, Design and implement low-latency, high-availability features, Write maintainable and tested code meeting open-source standards, Participate in code reviews, test automation, and on-call support

Seniority

Senior, hands-on IC

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