---
title: 'Multilingual Data Annotation Specialist at Zefr'
canonical: 'https://feeny.ai/job/multilingual-data-annotation-specialist-zefr-marina-del-rey-3f5kfrej1n9b'
type: 'job'
last_seen: '2026-09-04'
---

# Multilingual Data Annotation Specialist at Zefr

- **Company:** Zefr
- **Location:** Marina Del Rey, CA
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-08-31
- **Last confirmed live:** 2026-09-04
- **Apply:** https://jobs.ashbyhq.com/zefr/12ca1ac0-8109-4b8c-bdd4-aaa055972249

## Job description

## WHAT WE DO:

Zefr is the leading global technology company enabling responsible marketing in walled garden social environments. Zefr’s solutions empower brands to manage their content adjacency on scaled platforms such as YouTube, Meta, TikTok, and Snap, in accordance with industry standard frameworks. Through its patented AI technology, Zefr offers brands and agencies more accurate and transparent solutions for social walled gardens. The company is headquartered in Los Angeles, California, with additional locations across the globe.

What you’ll do:

We are hiring a Multilingual Data Annotation Specialist to support the training and performance of Zefr’s advanced AI systems. In this role, you will annotate videos, images, and metadata across platforms such as YouTube, TikTok, Meta, and Snap.

High quality human annotation is foundational to how our machine learning systems interpret, classify, and evaluate content at scale. Your work will directly shape the accuracy and integrity of our AI solutions.

We are looking for someone curious about machine learning and computer vision, energized by nuanced decision making, and committed to delivering precise, thoughtful work. The ideal candidate is self-directed, analytical, proactive, and comfortable navigating ambiguity. Candidates should value clarity, ask smart questions, and continuously seek opportunities to improve processes.

Here’s what you’ll get to do:

- Use internal tools to label social media content according to Zefr’s contextual category guidelines.
- Conduct daily annotation and quality evaluation across video, image, and metadata formats.
- Apply cognitive and cultural nuance when making judgment calls on complex or sensitive content.
- Interpret, apply, and help refine labeling frameworks and documentation.
- Identify emerging trends or edge cases and surface potential issues to stakeholders.
- Conduct root cause analyses to identify opportunities for improving content quality.
- Provide insights on content patterns and contribute to enhancements of the labeling interface.
- Generate weekly reports with findings and quality recommendations.
- Perform quality assurance across multiple project pipelines.
- Maintain up-to-date knowledge of Zefr policies and proactively suggest optimization opportunities.
- Gain foundational exposure to machine learning concepts and develop an understanding of how high quality annotation data powers AI systems.

Here’s what we’re looking for:

Language Requirements:

- Fluency in English and Hindi is required.
- Fluency in Spanish, Mandarin, Turkish, Tagalog, or others are a plus.

Qualifications and Experience:

- Professional experience in annotation, content moderation, labeling, quality assurance, or policy enforcement.
- Strong cultural fluency and ability to interpret contextual nuance across varied content types.
- Familiarity with major social media platforms including TikTok, YouTube, Facebook, Instagram, and Snapchat.
- Exceptional attention to detail with the ability to perform repetitive tasks with consistency and accuracy.
- Strong written communication skills, particularly in explaining ambiguity, inconsistencies, or definitional drift.
- Ability to apply style guides and enforce consistency across diverse content formats.
- Experience using AI tools such as Claude, Gemini, ChatGPT, or similar technologies.
- Proficiency in Google Workspace applications.
- Familiarity with SQL is a plus.

Working Style and Mindset:

- Reliable, self motivated, and capable of delivering high quality work independently.
- Strong analytical thinking and structured problem solving skills.
- Comfortable working in a fast-paced environment with shifting priorities.
- Work with sensitive content, including political topics, religious perspectives, violence, and adult material.
- Effective collaborator who can also operate autonomously.
- Willing to work a hybrid schedule with 2 to 3 days per week in our Marina del Rey office.
- Ability to appropriately handle confidential and proprietary information with sound judgment.

Benefits (for US based employees):

- Flexible PTO
- Medical, dental, and vision insurance with FSA options
- Company-paid life insurance
- Paid parental leave
- 401(k) with company match
- Professional development opportunities
- 13 paid holidays off
- Flexible hybrid work schedules
- “Summer Fridays” (shorter work days on select Fridays during the summertime)
- In-office lunches and lots of free food
- Optional in-person and virtual events (we like to celebrate!)

Compensation (for US based employees):

The anticipated salary for this position is 70,500. Individual pay is determined by factors such as job-related skills, experience, and relevant education or training. If your compensation expectations fall outside of this range, it may still be worth having a conversation.

Zefr is an equal opportunity employer that embraces diversity and inclusion in the workplace. We are committed to building a team that represents a variety of backgrounds, skills, and perspectives because we know this only makes us better. We strongly encourage women, persons of color, LGBTQIA+ individuals, persons with disabilities, members of ethnic minorities, foreign-born residents, and veterans to apply even if you do not meet 100% of the qualifications.

## About Zefr

## Company Overview
- **One-liner**: Zefr provides AI-powered brand safety, suitability, and viewability technology for social media platforms, enabling advertisers to navigate content risk and unlock performance across the feed.
- **Entity Type**: Private (growth-stage, backed by venture capital)
- **Headquarters**: Los Angeles, California, USA
- **Founded**: 2008
- **Founders**: Rich Raddon and Zach James

## Core Business
- **Primary industry/industries**: AdTech, Marketing Technology, Brand Safety & Suitability, AI/ML Content Classification
- **Target customers**: B2B — Enterprise brands, agencies, and advertisers running campaigns on major social platforms (Meta, TikTok, YouTube, Instagram)
- **Mission or purpose statement**: To help marketers move confidently through the chaos of social platforms with technology built to decode the feed — enabling brands to "be fearless in the feed."

## Products & Services
- **Zefr Platform Intelligence**: A multi-modal content classification engine that ingests video, audio, imagery, text, and metadata to provide frame-level accuracy for brand safety, suitability, misappropriation, AI-generated content, and viewability.
- **Activate and Verify**: Programmatic activation and verification for social platforms, available both pre-bid and post-bid, connecting planning data with performance metrics.
- **Custom Policy Moderation**: In-house content policy practitioners define custom brand models and guidelines, with human review for validation and escalation.
- **Zefr Media Services**: A managed media team that runs campaigns end-to-end using Zefr’s proprietary data and technology.
- **Zefr Labs**: An innovation arm building intelligence for emerging platforms, including how brands show up in AI and new media environments.
- **Data Solutions**: Cross-platform data ingestion and classification for deeper video understanding.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Total funding not publicly disclosed; revenue is private
- **Notable Investors/Partners**: Deep, direct integrations with Meta, TikTok, YouTube, and Instagram. Zefr was selected as the first third-party brand safety partner on both TikTok and Meta.
- **Growth Signals**: 
  - First third party to receive MRC accreditation for content-level reporting of brand safety and suitability on YouTube (2026)
  - MRC accreditation for viewability & IVT (2025), offered to advertisers free of charge
  - Expanded capabilities from YouTube (2008) to Facebook/Instagram (2015) to TikTok (2021)
  - Continues to build for AI and emerging platforms via Zefr Labs

## Competitive Advantages
- **Social-first architecture**: Engineered from the ground up to understand nuances of video, audio, and text within complex social feeds — not retrofitted from legacy open-web tools.
- **Platform-native partnerships**: Deep, direct integrations with major platforms ensure data accuracy and privacy compliance.
- **Independent intelligence**: Zefr is not a media owner, so its interests align purely with advertisers, providing unbiased data and insights.
- **Frame-level accuracy**: Multi-modal AI models trained for nuance, not keywords, enabling deep classification at scale.
- **First-mover accreditations**: First third-party MRC accreditation for content-level brand safety on YouTube (2026) and long-standing certifications.

## Strategic Focus
- **Current priorities**: Expanding content-level brand safety and suitability across all major social platforms; leading in viewability and IVT measurement; building intelligence for AI-generated content detection; and developing solutions for how brands show up in emerging AI platforms.
- **Growth direction**: Deepening platform integrations, scaling MRC-accredited metrics, and innovating through Zefr Labs to stay ahead of cultural and technological shifts in the social feed.

## Why Work Here
- **Culture highlights**: Zefr emphasizes a collaborative, inclusive environment with a focus on responsible marketing. The company values integrity, respect, and transparency — including a commitment to updating candidates at least once per week during the interview process.
- **Remote/hybrid/office policy**: Offers in-office, hybrid, and fully-remote work options.
- **Notable perks**:
  - Flexible Paid Time Off
  - Medical, Dental, and Vision Insurance with FSA Options
  - Company-Paid Life Insurance
  - Paid Parental Leave
  - 401(k) with Company Match
  - Professional Development Opportunities
  - 10 Paid Holidays
  - Summer Fridays (shorter work days on select Fridays during summer)
  - In-office lunches and free food
  - Optional in-person and virtual events, quarterly happy hours, team building, volunteer opportunities
- **Interview process**: Typically includes a Recruiter Phone Screen, Hiring Manager Interview, and Team Interview (with a coding challenge for technical roles). Goal is to provide a decision within three weeks or less.

## Sources
1. [zefr.com](https://zefr.com/about/company)
2. [zefr.com](https://zefr.com/)
3. [zefr.com](https://www.zefr.com/about/careers)
4. [zefr.com](https://zefr.com/about-us/culture)
5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/zefr)

## Other roles at Zefr

- [Data Engineer](https://feeny.ai/job/data-engineer-zefr-marina-del-rey-t78dgdwtt54q) — Marina Del Rey, CA
- [Senior Software Engineer](https://feeny.ai/job/senior-software-engineer-zefr-marina-del-rey-qdwwcya28356) — Marina Del Rey, CA