CRO Specialist

Join Proton and build a better internet where privacy is the default

Join Proton and build a better internet where privacy is the default

Proton was founded in 2014 by scientists from CERN on a simple truth: privacy is a fundamental human right. Since then weve built the worlds largest encrypted email service (Proton Mail) and expanded into Proton VPN Proton Drive Proton Pass and Proton Calendartools used by millions globally to protect their freedom fight censorship and keep their data some situations Proton has literally helped save lives!

We are profitable independent (no VC control) and selectively hire from the top 1% of applicants. Our 500 team members across 50 countries come from leading organizations and elite academic backgrounds. We move fast keep hierarchy light and prioritize impact over optics. If you want to do meaningful work with exceptionally high-caliber people this is it. Join us and do work you can truly be proud of.

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Role overview

We are looking for a CRO (Conversion Rate Optimisation) Specialist to support Protons Marketing team in improving conversion across our marketing websites and landing pages spanning traffic from SEO performance marketing affiliates and partnerships.
You will help run a steady cadence of experiments and landing-page iterations that improve key funnels such as acquisition sign-up and upgrade ensuring tests are well-scoped properly measured and clearly documented.
You will collaborate closely with Design Engineering Product and Analytics teams plus channel owners to turn insights into high-quality tests and ship changes that measurably improve user outcomes.

What youll do

• Be part of end-to-end experiment scoping and preparation by helping write and refine hypotheses draft experiment briefs align with the team on primary metrics and key guardrails and translate requirements into the landing page/page-variant updates needed ahead of launch.
• Work in close alignment with the Data/Analytics team to review funnel performance understand drop-offs and bottlenecks and translate insights into prioritized test ideas and clear next actions.
• Coordinate with Product Engineering and Analytics to align on measurement needs (events tracking plans tagging assumptions dashboards) so experiment readouts are reliable and consistent.
• Partner with Design Content and marketing channel owners to adapt landing page messaging and structure to match traffic intent and channel needs (Organic Performance Marketing Affiliates and Influencers).
• Create iterate on and QA landing pages and experiment variants in the page/content publishing workflow ensuring consistency across devices and key entry points.
• Document experiment outcomes decisions and learnings in a structured way so insights compound over time and enable faster iteration across future tests and teams.

Job requirements

• An experimentation mindset: you are curious structured and guided by a user-first mindset focusing on measurable improvements across acquisition sign-up checkout and upgrade funnels.
• 1 to 3 years of experience inconversion rate optimizationand experimentation with exposure to at least one of the following areas: growth lifecycle or performance marketing and clear examples of measurable conversion impact.
• Ability to translate insights into clear hypotheses define primary metrics and guardrails and support A/B tests through launch QA and readout.
• Solid analytical foundations: comfortable reviewing funnel performance spotting drop-offs and turning results into prioritised next actions with Data/Analytics.
• Tracking and measurement literacy: able to align with Product and Engineering on events tagging assumptions and dashboards so results are reliable.
• Hands-on landing page optimisation: build iterate and QA pages and variants in a CMS/page builder with strong attention to detail across devices.
• Strong cross-functional collaboration and documentation: coordinate with Design Engineering Product and channel owners and document learnings so iteration gets faster.

What We Offer

• Work that Matters:millions of people trust Proton with their privacy. We answer only to our users not advertisers not investors with conflicting agendas not governments. The work you do here is real and the impact is measurable. (read more about our impact here)
• Work with smart and dedicated people -Our team is diverse collaborative and tight-knit with people coming from all walks of life including many of the worlds top academic institutions and organizations such as MIT Harvard Stanford Caltech Cambridge and ETH.
• Technology:youll get the right hardware and the right software you need to do your best work.
• Learning & Development:we invest in your growth because sharp people make us better. Proton is one of the fastest ways to accelerate your career because youll be thrown into real challenges with real ownership from day one.
• Employee Benefits:your wellbeing isnt an afterthought. We offer strong health coverage solid retirement options generous leave and wellness support so you can bring your best self to work every day
• Stock Options:at Proton we all have the opportunity to be owners of the company. From day one you have a real stake in what were building. When Proton wins you win.
• In-Person Collaboration: Amazing things happen when passionate smart and purposeful people get together in the same room. With offices across Geneva Zürich Barcelona London and more youll spend most of your time collaborating face-to-face with people who genuinely care about what theyre building
• Food:Lunch and snacks are on us every day in our offices so you can focus on the work and not on whats for lunch.
• Transport:getting to the office shouldnt cost you. We cover public transport bike allowances or parking whichever works for you.
• Flexible Working:you own your schedule. Set hours that work for you and your team because outcomes matter more than when the clock says you started.

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Our Commitment to Diversity and Inclusion

At Proton we believe diversity drives innovation and strengthens our mission to provide privacy as a default for all. We are committed to fostering an inclusive environment where all individuals regardless of race ethnicity gender age sexual orientation physical ability or socio-economic background feel valued and empowered. We strive to create equal opportunities promote open dialogue and support continuous learning to ensure every voice is heard and respected.

If you need any extra support or reasonable adjustments during the hiring process please let your talent partner know.

Candidate Privacy Notice

When you apply for a position refer a candidate or are considered for a role at Proton Technologies AG (Proton we us or our) your information is stored in Greenhouse in accordance with theirService Privacy information is used to evaluate your suitability for the posted position. We also retain this information for consideration for future roles that you may apply for or that we believe may align with your background and skills.

If we no longer have a legitimate business need to process your information we will either delete or anonymize it. Should you have any inquiries about how we use or manage your information or if you wish to access correct or delete your data please contact our privacy team at

Proton does not accept unsolicited resumes from any sources other than directly from candidates. We will not pay a fee for any placement resulting from an unsolicited offer even if the candidate is subsequently hired by Proton.

To learn more about our privacy policy please visitour privacy policy page.

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