App Marketing CRO Manager | Mid-Senior

OpenKrill; United States; On-site; USD 85,000 - 120,000; Full time

Benefits offered by this job

Flexible work options

Annual learning budget

Private health insurance

Job summary

Openkrill is seeking a data-driven Growth/A/B Testing Specialist to lead experimentation across marketing funnels for mobile-first growth. You will own the hypothesis-to-results cycle, design tests, and collaborate with product, design, analytics, and marketing teams to unlock improvements in onboarding, paywall, upsell, and retention.

The role requires strong analytical thinking, excellent communication, and the ability to manage multiple experiments in parallel in a fast-paced environment.

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.
• 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 to translate test results for technical and non-technical audiences.

Responsibilities

• Develop data-driven hypotheses for in-app A/B tests across key marketing funnels and maintain a testing roadmap.
• Plan, prioritize, and manage the full A/B testing lifecycle from hypothesis to results analysis.
• Collaborate with designers, engineers, analysts, and marketing to scope, build, and launch experiments.
• Define success metrics and KPIs; ensure data tracking and instrumentation is in place.
• Monitor live experiments for data quality and statistical significance; flag blockers.
• Analyze test outcomes and synthesize findings into actionable recommendations and stakeholder updates.
• Create and maintain documentation for each experiment (hypothesis, setup, audience, duration, results, next steps).

Skills

A/B testing

Digital marketing

Analytics

Experiment design

Data-driven decision making

Cross-functional collaboration

Tools

Amplitude

Firebase

Mixpanel

Job description

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MAIN 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).

CORE REQUIREMENTS

• 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 (verbal and written) - 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.

WHAT WE OFFER

• Sharpen your edge: training, mentorship, and room to grow - always.
• Take the time you need: extra vacation days, sick days, and time off when life calls.
• Get premium healthcare: private health insurance in Lithuania and Poland - fully covered.
• Protect your peace: enjoy free subscriptions to Calm, Headspace, and Mindletic, and our own resilience and mindfulness trainings.
• Own your fitness: in-house gyms, sport cards, online workouts, and personal guidance - on us.
• Pack your bags for workation: experience our company-wide trip abroad to the fullest.
• Work from anywhere: work from wherever keeps you in the zone.
• Celebrate your milestones: birthdays, weddings, and new family members - all deserve a gift.
• Parent with ease: children's summer camps and flexibility around the schedule - because parenting never pauses.
• Join the party: team building and company events people talk about for months.
• Unlock Cyber City: coffee bar, open gyms, kids' room, music room, massage chairs - our Vilnius HQ is yours to enjoy.

Kindly refer to our Privacy Notice for Recruitment Candidates https://drive.google.com/file/d/1b2tV684_SYV1jQ4kuf91cnzrRBk3ef-5/view for comprehensive information regarding our data handling procedures throughout recruitment processes.

We expect all candidates to provide accurate and complete information during the recruitment process. While limited use of AI tools to refine application materials is acceptable, candidates remain fully responsible for ensuring that their submissions reflect their own qualifications, skills, and experience. Any failure to do so may negatively affect participation in the recruitment process. If broader AI assistance is allowed for a particular role or stage, we'll let you know in advance.

By submitting your application, you acknowledge that it may be processed using automated tools for evaluation purposes. As part of our recruitment process, we may use an AI-based application review tool to help assess applications based on skills and experience relevant to the role. This technology is used to support - not replace - human decision-making, and every application is ultimately reviewed by a recruiter.

If you would like more information about how AI is used in this process or wish to exercise your rights under applicable data privacy laws, please contact us at [e-mail].