Ahmad Tayel
Verified Expert in Engineering
Data Analyst and Developer
Malaga, Spain
Toptal member since May 28, 2026
Ahmad is a senior data analyst with over 6 years of experience in fintech, payments, and growth analytics. His expertise spans BigQuery, dbt, Tableau, and Looker, with notable work at Tabby, Calo, Paymob, and Bypa-ss. He built onboarding dashboards to reduce ad-hoc requests and led initiatives, achieving up to 50% YoY revenue impact.
Portfolio
Experience
- SQL - 6 years
- Tableau - 6 years
- Looker - 6 years
- Python - 6 years
- A/B Testing - 6 years
- Looker Studio - 6 years
- Data Analytics - 6 years
- Microsoft Power BI Desktop - 6 years
Preferred Environment
BigQuery, Data Build Tool (dbt), Tableau, Redash, Looker, Elasticsearch
The most amazing...
...onboarding analytics I've owned cut ad-hoc requests across teams by building 10+ dashboards.
Work Experience
Senior Data Analyst
Tabby
- Owned merchant onboarding analytics end-to-end, partnering directly with product and operations leadership on global KYB, underwriting, and activation strategy.
- Designed scalable BigQuery and dbt data solutions, building 10+ onboarding dashboards and reusable datasets that cut ad-hoc requests across teams.
- Shaped onboarding strategy by instrumenting 25+ tracking events and defining SLAs/KPIs adopted across markets.
- Developed real-time anomaly detection for approval-rate drift, reducing intervention time by 40%.
Senior Product Analyst
Insense Ads
- Mentored internal analysts and delivered deep insights into creator/client behavior across the creator marketplace.
- Built 15+ Tableau/Redash dashboards and shipped a custom GPT tool that cut ad-hoc analytics response time by 60%.
- Deployed a custom GPT tool that cut ad-hoc analytical response time by 60%.
Senior Business Analyst
Calo
- Led ambiguous AI-personalization analytics for 50,000+ users, owning scope and deliverables across product, data science, and ops.
- Translated model performance into business outcomes: over 12% matching accuracy, less than 23% swap rates, and over 12% retention.
- Built a menu-sizing simulation that saved $10 million annually by re-sizing meals while meeting user calorie targets.
Senior Data Analyst
Paymob
- Drove a 7% MoM success-rate uplift for online payments by leading a cross-functional unified checkout initiative.
- Lifted intention-to-pay conversion 16% through rigorous A/B testing with product managers and designers.
- Scaled decision-making across the organization by building real-time SQL/dbt/Looker reporting infrastructure.
Senior Product Analyst
Bypa-ss
- Pioneered analytics infrastructure on Tableau, Looker, and Elasticsearch, scaling the user base 10x to 200,000.
- Orchestrated A/B tests driving over 35% subscription growth.
- Delivered over 50% YoY revenue impact through SQL-driven customer insight.
Experience
Cross-channel Marketing Performance Dashboard (Looker Studio)
The scope of work included connector configuration and access management, calculated fields (ROAS, CAC, CVR, vs. Target) defined in-report so charts stay portable, and a multi-page layout (Executive Overview, Paid Media, Web Behavior, Pipeline, Targets). The funnel chart traces conversions from ad click to closed deal, so marketing and sales have the same view.
The solution was designed so that a non-technical marketing lead can interpret it without support. It includes pairs with a handoff document covering data sources, calculated field formulas, refresh schedule, and known quirks such as UTM drift and GA4 attribution lag. Sample data is shown for illustration.
Education
Master's Degree in Data Science and AI
University of Liverpool - Online
Bachelor's Degree in Mechatronics Engineering
German University In Cairo - Cairo, Egypt
Certifications
A/B Testing in Python
DataCamp
Data Product Manager
Udacity
Product-led Growth Micro-certification (PLGC)
Product School
Product Analytics Micro-certification (PAC)
Product School
SQL Advanced
HackerRank
Skills
Tools
BigQuery, Tableau, Redash, Looker
Languages
SQL, Python
Paradigms
ETL
Platforms
Google Ads, HubSpot
Storage
Elasticsearch
Other
Data Build Tool (dbt), Generative Pre-trained Transformers (GPT), A/B Testing, Experimental Design, Cohort Analysis, Data Modeling, Product Analytics, Revenue Analytics, Data Science, Artificial Intelligence (AI), Engineering, Data, Looker Studio, Google Analytics 4 (GA4), Data Visualization, Marketing Analytics, Data Blending, Dashboard Design, Data Analytics, Microsoft Power BI Desktop
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