Senior Data Analyst

Remote from: Serbia
Annual salary: Undisclosed
Salary information is not provided for this position. Check our Salary Directory to estimate the average compensation for similar roles.
Department: Data Science & Analytics
Employment type: Full Time,
Job posted: 15 May 2026
Apply before: 15 Jun 2026
Experience level: Senior
Views / Applies: 24 / 1

Crafting Consumer Products of Tomorrow

AI Summary

Ruby Labs is seeking a Senior Data Analyst to join their fast-growing team, working on a new job application platform. The role involves collecting, categorizing, and analyzing data to create actionable reports, uncovering insights, and driving product decisions. Key responsibilities include partnering with product owners, designing dashboards, conducting A/B tests, and building data models. Candidates need a degree in an analytical field, 3+ years of experience, advanced SQL, and proficiency with analytics tools like Mixpanel or GA4. The position is remote within CET timezone and offers unlimited PTO.

Job Complexity

Easy Hard

AI Insight The role requires 3+ years of experience and advanced technical skills like SQL and analytics tools, but the qualifications are standard for a senior analyst position, making it moderately challenging.

Salary Analysis

AI Insight The salary was not provided in the listing. Based on US market data for Senior Data Analysts, the median salary is approximately $110,000 per year. The typical range for this role is $80,000 to $150,000, depending on experience and location. Since the role is remote and based in CET timezone, salaries may vary. The company offers unlimited PTO, which adds value beyond base salary.

Key Skills

Data Analysis SQL Product Analytics A/B Testing Data Visualization Mixpanel Tableau User Behavior Analysis Python BigQuery

Cover Letter Sample

Dear Hiring Team,

I am excited to apply for the Senior Data Analyst position at Ruby Labs. With over 3 years of experience in product analytics and a strong background in SQL, I have successfully driven data-informed decisions that improved key metrics. I am particularly drawn to the opportunity to work on a new job application platform, where my skills in user behavior analysis and A/B testing can directly impact the product roadmap.

In my previous role, I designed dashboards using Looker and conducted rigorous A/B tests that increased conversion rates by 15%. I am proficient in Mixpanel and GA4, and I enjoy collaborating with cross-functional teams to uncover actionable insights. I am eager to bring my analytical rigor and strategic thinking to Ruby Labs.

Thank you for considering my application. I look forward to the possibility of contributing to your team.

Sincerely,
[Your Name]

Possible Interview Questions

Can you describe a time when you used data to influence a product decision?

In my previous role, I noticed a drop in user retention for a feature. I analyzed user behavior data and found that users who completed an onboarding tutorial had higher retention. I presented this insight to the product team, and we redesigned the tutorial, resulting in a 20% increase in retention.

How do you approach designing an A/B test?

I start by defining a clear hypothesis and key metrics. Then, I determine sample size and duration using power analysis. I ensure randomization and control for confounding variables. After running the test, I use statistical significance tests to validate results and provide recommendations.

Explain a complex SQL query you wrote recently.

I wrote a query to calculate user churn rates segmented by acquisition channel. It involved joining multiple tables, using window functions to identify first and last activity dates, and aggregating by month. The query helped identify which channels had the highest churn, enabling targeted retention efforts.

How do you ensure data quality in your analysis?

I implement data validation checks at each stage, such as checking for missing values, duplicates, and outliers. I also document data sources and transformations. Regular audits and peer reviews help maintain accuracy. For critical reports, I automate data quality alerts.

Describe your experience with Mixpanel or similar analytics tools.

I have used Mixpanel extensively for event tracking, funnel analysis, and cohort analysis. I set up custom dashboards to monitor user engagement and conversion funnels. I also used Mixpanel's segmentation features to analyze user behavior by attributes, which informed product improvements.

About us

Ruby Labs is a leading tech company that creates and operates innovative consumer products. We offer a diverse range of opportunities across the health, education, and entertainment industries. Our innovative teams are driving the future of consumer-led products, and we’re always looking for passionate individuals to join us. Learn more about our story at: https://rubylabs.com/about-us/

About the role

Join Ruby Labs as a Senior Data Analyst and become a key part of our fast-paced, rapidly growing team working on a new product – a job application platform that streamlines the hiring journey for professionals.

In this role, you’ll collect, categorize, and analyze data to create actionable reports that drive decision-making across the company. You’ll uncover insights, identify growth opportunities, establish key benchmarks, and ensure we deliver a product that truly satisfies our customers’ needs.

We expect you to take full ownership of data pipelines, analytics, and insights, ensuring every decision is backed by reliable data. You’ll work in a professional and dynamic environment where accuracy matters, constantly validating that our data is meaningful and actionable.

Why Join Us

Work on an outstanding product: Our platform is trendy, fast-scaling, and redefining how people change their professional roles.
Make a direct impact: As a Senior Data Analyst, your insights will guide product decisions, influence the roadmap, and shape user experiences.
Tackle meaningful challenges: From decoding user intent across millions of interactions to optimising conversion funnels, you’ll face complex and exciting problems every day.
Grow with us: This is an ambitious journey with huge potential – perfect for someone eager to grow alongside a cutting-edge product and market.

Key Responsibilities

Partner with Product Owners and Data Teams across marketing, billing, and product domains.
Create new dashboards, maintain and improve existing reports such as Product Reports.
User behavior analysis, aha moment analysis.
Analyse data to generate actionable insights, find trends, patterns and provide recommendations to maximize KPIs.
Design and conduct A/B tests and homogeneity tests to validate hypotheses and measure impact.
Monitor metrics across all domains.
Design and build robust data models in SQL.
Give and receive actionable feedback to and from peers and the Leadership Team.

Qualifications

Degree in an analytical field such as Math, Data Science or Economics.
At least 3+ years of work experience as a Data Analyst.
Strong analytical and problem-solving skills, with the ability to identify trends, patterns, and insights in large datasets.
Excellent verbal communication.
Ability to think strategically and make data-driven decisions that align with the organisation’s goals.
Experience in Product Analytics.
Experience with Mixpanel, GA4, Amplitude or similar.
Advanced SQL.
Experience with popular BI tools such as Tableau, Looker, or similar.
Experience in subscription business.
Ability to adapt quickly, learn new tools and methods efficiently, and work effectively in a high-pressure, fast-changing environment.
Fluent English and Russian/Ukrainian.

Nice to have

Strong spoken and written English.
Experience in Marketing Analytics.
Experience with Python, R.
Experience with GCP, BigQuery.
Experience with Google Ads, Facebook Ads etc.
Experience with orchestration frameworks such as Airflow.
Experience with git and code review process.

Location

Ruby Labs operates within the CET (Central European Time) zone. Applicants from any country are welcome to apply for the position as long as they are located within approximately ± 4 hours of CET. This ensures optimal collaboration and communication during working hours.

Benefits

Discover the perks of being part of our vibrant team! We offer:

Remote Work Environment: Embrace the freedom to work from anywhere, anytime, promoting a healthy work-life balance.
Unlimited PTO: Enjoy unlimited paid time off to recharge and prioritize your well-being, without counting days.
Paid National Holidays: Celebrate and relax on national holidays with paid time off to unwind and recharge.
Company-provided MacBook: Experience seamless productivity with top-notch Apple MacBooks provided to all employees who need them.
Flexible Independent Contractor Agreement: Unlock the benefits of flexibility, autonomy, and entrepreneurial opportunities. Benefit from tax advantages, networking opportunities, reduced employment obligations, and the freedom to work from anywhere. Read more about it here: https://docs.google.com/document/d/1nkrN76JlZkbKj9WSOhlT1_mni_CZeDkHdwfIjPXVwvk/preview?tab=t.0#heading=h.ndsdl4wapxtt

Be part of our fast-growing team and seize this excellent opportunity for personal and professional growth!

Interview Process

After submitting your application, we conduct a thorough review which typically takes 3 to 5 days, but may occasionally take longer due to the volume of applications received. If we see a potential fit, we proceed with the following steps:

Recruiter Screening (40 minutes)
Technical Interview (90 minutes)
Final Interview (60 minutes)

Life at Ruby Labs

At Ruby Labs, we move fast, aim high, and expect the same from our team. We’re not here to play small—we’re here to build, grow, and win. That means we look for people who are ambitious, driven, and ready to give their best every single day.

This is a place for individuals who thrive under pressure, embrace challenges, and see opportunity in every obstacle. If you’re hungry to achieve, motivated by impact, and want to grow at the speed of your own ambition, Ruby Labs offers the platform to make it happen.

Here, effort is matched with reward. We recognize those who go all in and deliver results, and we create space for people who want more—more responsibility, more growth, and more success.

#LI-Remote

Apply now >