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Software Engineer, Backend/Applied ML (Safety & Integrity)

About the roleWe’re looking for a talented and creative Software Engineer to join our Safety Engineering team at Character.AI! In this role, you will be at the forefront of designing, developing, and scaling robust backend systems and lever

Company

Character.AI

Location

Redwood City, CA

Status

Open

Posted

2026-01-07T16:24:25.522+00:00

Character.AI seeks a backend/applied ML engineer for its Safety Engineering team in Redwood City, California, hybrid. The person will build scalable backend systems and ML models for integrity and safety: content classification, spam detection, anomaly detection, risk scoring, behavior analysis, and safeguards for generative AI such as content filtering, bias mitigation, and output monitoring. The posting asks for 8+ years of backend engineering, Python, Go, Java, or C++, and ML lifecycle experience. Distinctive: human-to-AI safety and generative AI misuse.