
ActiveFence is the leading provider of UGC and AI Safety solutions, delivering the industry’s most robust safeguards, to protect the world’s leading foundation models and AI-powered applications. Trusted by safety teams of all sizes, we help protect over three billion users from threats such as child abuse, exploitation, hate speech, and more. Our comprehensive solutions integrate deep intelligence research, AI-driven harmful content detection, and a robust moderation platform, enabling global platforms to operate safely and responsibly in over 100 languages.

ActiveFence is the leading provider of UGC and AI Safety solutions, delivering the industry’s most robust safeguards, to protect the world’s leading foundation models and AI-powered applications. Trusted by safety teams of all sizes, we help protect over three billion users from threats such as child abuse, exploitation, hate speech, and more. Our comprehensive solutions integrate deep intelligence research, AI-driven harmful content detection, and a robust moderation platform, enabling global platforms to operate safely and responsibly in over 100 languages.
Core offering: AI-driven trust & safety platform for detecting and preventing online harm (child abuse, hate speech, disinformation, fraud, terror, etc.).
Scale: Claims to protect over 3 billion users and supports 100+ languages.
Funding (disclosed): $100M disclosed in July 2021 (covers a Series B and a previously unannounced Series A).
Founding & HQ: Founded in 2018; co-headquartered in New York and Tel Aviv.
M&A signal: Acquired Rewire (announced March 8, 2023) to expand text-based harmful-content models.
Team size (directory): Reported ~366 employees.
Trust & Safety / online harm detection and prevention for platforms (content and behavior abuse).
2018
Software Development
Part of the $100M disclosed on July 26, 2021; the $100M covered this Series B and a previously unannounced Series A.
Previously unannounced Series A included in the $100M disclosed July 26, 2021.
Reported undisclosed funding round in Q1 2023; amount and investors not publicly disclosed.
“Investors reported include CRV, Highland Europe, Norwest Venture Partners, Grove Ventures, Vintage Investment Partners, Resolute Ventures and Phoenix Financial; Telefonica has also been reported as an investor.”
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We’re building a platform of autonomous AI agents for data collection, labeling, and intelligent analysis — and we’re looking for a Senior Backend Engineer to power this system. You will architect and implement core services that interface with LangGraph-based workflows, manage data access from structured and unstructured sources, and support seamless orchestration between our AI layers and data infrastructure. The ideal candidate is comfortable working with AWS Bedrock, vector databases, and building APIs optimized for AI-scale interaction.
Responsibilities
Requirements
Preferred Qualifications
About ActiveFence
ActiveFence is the leading provider of security and safety solutions for online experiences, safeguarding more than 3 billion users, top foundation models, and the world’s largest enterprises and tech platforms every day.
As a trusted ally to major technology firms and Fortune 500 brands that build user-generated and GenAI products, ActiveFence empowers security, AI, and policy teams with low-latency Real-Time Guardrails and a continuous Red Teaming program that pressure-tests systems with adversarial prompts and emerging threat techniques. Powered by deep threat intelligence, unmatched harmful-content detection, and coverage of 117+ languages, ActiveFence enables organizations to deliver engaging and trustworthy experiences at global scale while operating safely and responsibly across all threat landscapes.