Junior CRO & Growth Engineer (Remote)

Ruby Labs Ltd; España; Hybrid; EUR 28,000 - 42,000; Full time

Benefits offered by this job

Remote Work Environment

Unlimited PTO

Paid National Holidays

Company-provided MacBook

Flexible Independent Contractor Act

Job summary

Ruby Labs Ltd. is seeking a hands-on Junior CRO Manager to join one of our growth teams. You will execute the testing roadmap by building live experiments, landing pages, and funnels using AI tools, collaborating with the Senior CRO Manager.

You will own parts of the roadmap as your judgment proves effective, shipping variants quickly while maintaining quality and clear documentation across tests and results.

Qualifications

• 1+ years hands-on CRO, growth, product, or digital marketing experience (built pages, run or supported tests, or shipped funnel changes).
• Strong design sense; can assess landing pages and build them with available tools.
• Bias for shipping: prioritize live variants over polishing, while maintaining momentum.
• Proactive: identify tasks without waiting for tickets and take action.
• Strong English communication; able to write hypotheses, tickets, and summaries daily.
• Good judgment on conversion opportunities; can evaluate pages and funnels for testing value.
• Comfortable with ambiguity; adapt priorities and make sensible decisions with messy data.
• AI-native habits: familiarity with Claude or similar AI tools in workflow.
• Attention to detail; tests must be set up correctly and double-checked.

Responsibilities

• Build new landing pages and funnels; test messaging, structure and offers.
• Prepare designs with Claude; turn hypotheses into AI-generated mockups and variants.
• Set up experiments; configure A/B tests, define success metrics, verify tracking.
• Manage experiment pipeline; brief engineers and track each test from setup to rollout.
• Contribute test ideas by studying the funnel, competitors, and user behavior.
• Support analysis and documentation; read results, document learnings, and keep the roadmap current.

Skills

CRO testing

Growth mindset

A/B testing

Analytics tooling

English proficiency

Bias for shipping

Proactive

AI-native

Attention to detail

User behavior analysis

Education

Bachelor's degree

Tools

Claude

Google Analytics

Mixpanel

No-code tools

Job description

Ruby Labs Ltd. is seeking a hands-on Junior CRO Manager to join one of our growth teams. You will execute the testing roadmap by building live experiments, landing pages, and funnels using AI tools, collaborating with the Senior CRO Manager.

You will own parts of the roadmap as your judgment proves effective, shipping variants quickly while maintaining quality and clear documentation across tests and results.