Christos Alexakis

Enabling data-driven growth for e-commerce clients contributing to over 20% YoY revenue impact. Clients include large companies with annual marketing spends > €30M as well as smaller ones with low data fluency. •Marketing Intelligence •KPI Definition •Attribution Models •Advanced Analytics •Data Modelling •Marketing Operations Automation Tech Stack: Python, BigQuery, SQL, ML, Looker, Superset, Tableau, Power BI, Google Analytics, GTM, GCP, Airflow, Docker, Dataform, dbt

• Developed marketing attribution models using PySpark, BigQuery and Airflow • Worked closely with Marketing and Growth teams delivering insights to optimize campaigns and reach OKRs • Served as data consultant for Acquisition and Retention squads as well as in projects of the data science team • Analyzed user journeys in web and mobile application to provide funnel performance transparency • Extracted insights from user text reviews using NLP methods in Python uncovering improvement potential

• Delivered advanced analytics including cohort analyses, customer clustering, CLV and TV marketing performance • Migrated reporting to Looker Studio and consulted marketing and product teams with setting and monitoring KPIs • Wrote PySpark ETL jobs and configured Dataproc clusters to load Snowplow event data in BigQuery • Designed and analyzed A/B Tests in Google Optimize and Firebase Remote Config • Built marketing data connectors to BigQuery and web scraping scripts in Python to use in reporting

• Analyzed Snowplow events (~1m/ day) and transactional data with Apache Spark, Python (pandas, NumPy, matplotlib, Seaborn, Bokeh) and PostgreSQL • Prepared business performance reports for the CEO and investors • Enhanced tracking data with new events using Javascript and GTM • Maintained the BI data pipeline and dashboard application in AWS ensuring data integrity

• Automated reporting process with Python and Google Sheets • Tracked project performance and provided with recruiting KPIs • Conducted active search for all seniority level positions for high value Startup companies

• Developed MS Access database applications • Administered the local computer network and maintained hardware (100 workstations) • Created PowerPoint presentations for high level military meetings and events • Operated Strictly Confidential Documents

•Developed a mathematical model of an optical wireless communication system in MATLAB to predict its performance given specific parameters •Increased system throughput 5 times and range 2 times •Set up a 6 month test and implemented the acquisition and logging of the communication system and weather measurement data •Analysed statistically and visualised data for publications, conferences and internal meetings •Co-authored 5 publications and contributed to the development of the HHI LED-Backhaul

• Performed characterisation tests and measurements for high frequency photodiodes and lasers (up to 40 Gb/s) • Managed, statistically analysed and evaluated the measurement data for project reports

Side job during preparation for Master studies. • Talent sourcing for Startup companies with active search and candidate contacting

Optische Nachrichtentechnik, Photonik, Lichttechnik, Signal Verarbeitung Master Thesis: Design and Analysis of High Bandwidth Optical Wireless Systems with LED, Grade: 1.3

5 year studies with advanced mathematics core. Relevant Courses: Probability Theory and Statistics, Linear Algebra, Numerical Analysis, Differential Calculus, Physics, Scientific Programming, C, HTML Thesis: "Amplification of DPSK Optical Pulses in Semiconductor Optical Amplifier", Grade: 10/10