Zefr
responsible marketing
Zefr is helping power the age of responsible marketing by enabling transparent, content-level targeting and measurement across the walled garden platforms.
Is Zefr hiring?
Yes. As of October 5, 2026, Zefr has 3 open roles on Metaintro.
Open roles
Newest first. Pay shown when the posting lists it.
- Data EngineerDeveloperMarina del Rey · Hybrid · $100K – $130K/yrMarina del ReyHybrid$100K – $130K/yrSep 3, 2026
- Multilingual Data Annotation SpecialistQuality AssuranceMarina del Rey · Hybrid · $70.5K/yrMarina del ReyHybrid$70.5K/yrAug 31, 2026
- Senior Software EngineerDeveloperMarina del Rey · Hybrid · $180K – $200K/yrMarina del ReyHybrid$180K – $200K/yrJul 23, 2026
Hiring pattern
How fast Zefr is adding roles, and how they're set up.
New roles each monthRoles first posted in the month
Customers
All 12 companies Zefr names as customers.
Customers hiring now1
- CMI Media Group28 open roles
Case studies9
- Waitrose
- Movistar Telefónica Hispam
- Marks & Spencer
- Mazda
- Telefónica
- Sony Pictures Entertainment
- Rexona
- McCain Foods
- Adidas
Other customers2
- Telefónica S.A.
- Tuenti Equador
What their customers say
Quotes from people at Zefr's customers.
“Leveraging Zefr’s Brand Suitability Data for Meta’s Advantage+ shopping campaign exceeded our performance expectations. We achieved higher ROAS and acquired new customers without compromising on brand safety and suitability. Testing Meta’s new product, ASC and incorporating Zefr’s Allow Lists for FAN is a proven successful strategy, and we look forward to continuing our partnership in the future.”
“I applaud the excellent partnership we had with Zefr and our agency to identify brand suitable opportunities that improved our digital strategy. Brand suitability is without a doubt one of the most important KPIs we cannot neglect.”
“Partnering with Zefr allowed M&S to effectively utilize their budget, optimize campaign performance, and achieve total transparency and peace of mind that their ads did not appear adjacent to any unsafe or unsuitable content.”
“We wanted to take our social campaigns to the next level, leaving the traditional behind. With Zefr, we were able to combine brand safety and media quality, which translated into better results, greater efficiency and a more robust advertising experience.”
“We value the partnership with Zefr that allowed CMI Media Group to implement the first-ever 3rd party brand safety measurement on Meta for a pharma campaign, resulting in actionable insights that drove campaign goals.”
AI launches and partners
What Zefr has launched and who it works with on AI.
- LaunchEnd-to-End AI DevelopmentZefr Labs designs, builds, and scales AI solutions across the full lifecycle—from architecture and infrastructure to deployment and continuous optimization.
- LaunchAgentic AIAgentic AI drives faster innovation through tailored AI agents, rapid rollout, and flexible, scalable frameworks.
- LaunchGenerative AIGenerative AI brings AI into the core of your business to simplify operations, surface better insights, and create more engaging customer experiences.
- LaunchCustom AI solutionsZefr Labs builds custom AI solutions for brands operating at the edge of what's possible.
Interviews
How Zefr describes its hiring process.
“Interviewing with Zefr? We’re excited to spend some time getting to know you!”
Skills they ask for
Most frequent across open postings.
Tech stack
- Analytics
- Google Analytics 4
- Libraries
- Alpine.js
- Security
- Termly
Company facts
Questions about Zefr
- Is Zefr hiring?
- Yes. As of October 5, 2026, Zefr has 3 open roles on Metaintro. The most are in Developer (2) and Quality Assurance (1).
- What is the interview process at Zefr?
- Zefr describes it this way: “Interviewing with Zefr? We’re excited to spend some time getting to know you!”
- Who are Zefr's customers?
- Zefr names 12 customers, including CMI Media Group, Waitrose, Movistar Telefónica Hispam, Marks & Spencer, and Mazda.