App Growth & CRO Manager — Lead A/B Testing

Nord Security; Polska; Remote; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Healthcare and wellness benefits

Work from anywhere

Team events and activities

Professional development and mentoring

Job summary

Saily is seeking a Growth Marketing / CRO specialist to drive data-driven experiments across marketing funnels. You will design, run, and analyze A/B tests, collaborating with design, engineering, analytics, and marketing to optimize onboarding, paywalls, upsell, and retention.

The role emphasizes rigorous measurement, clear storytelling, and fast iteration in a dynamic, remote-friendly environment. The ideal candidate has hands-on CRO in digital marketing, strong analytics chops with

Qualifications

• Experience in digital marketing, CRO, or growth — with hands-on A/B testing involvement.
• Solid understanding of experimentation methodology: hypothesis design, sample sizing, statistical significance, common pitfalls.
• Familiarity with mobile app development processes and release cycles.
• Experience working with analytics and tracking tools (e.g., Amplitude, Firebase, Mixpanel or similar);
• Strong communication skills — able to translate test results into clear narratives for both technical and non-technical audiences;
• Data-driven decision-making mindset with strong analytical thinking;
• Rigorous attention to detail, especially around data accuracy and test setup;
• Ability to manage multiple experiments in parallel in a fast-paced environment;
• Self-motivated and self-managing — comfortable owning the process end to end;
• Solid organizational skills, including prioritization, time management, and stakeholder alignment.

Responsibilities

• Develop data-driven hypotheses for in-app A/B tests across key marketing funnels (onboarding, paywall, upsell, retention) and maintain a structured testing roadmap and backlog;
• Plan, prioritize, and manage the full A/B testing lifecycle — from hypothesis through execution to results analysis;
• Work cross-functionally with designers, developers, analysts, and marketing stakeholders to scope, build, and launch experiments;
• Define success metrics and KPIs for each test; ensure proper data tracking and instrumentation is in place for accurate measurement;
• Monitor live experiments for data quality, statistical significance, and anomalies; proactively flag and remove blockers that could delay launches or compromise results;
• Analyze test outcomes and synthesize findings into clear, actionable recommendations; communicate status and results to relevant stakeholders throughout the process;
• Create and maintain comprehensive documentation for each experiment (hypothesis, setup, audience, duration, results, next steps).

Skills

A/B testing

Growth marketing

Digital marketing

Analytics

Experimentation

Communication

Data-driven decision making

Tools

Amplitude

Firebase

Mixpanel

Job description

Saily is seeking a Growth Marketing / CRO specialist to drive data-driven experiments across marketing funnels. You will design, run, and analyze A/B tests, collaborating with design, engineering, analytics, and marketing to optimize onboarding, paywalls, upsell, and retention.

The role emphasizes rigorous measurement, clear storytelling, and fast iteration in a dynamic, remote-friendly environment. The ideal candidate has hands-on CRO in digital marketing, strong analytics chops with