Summary
Overview
Work History
Education
Skills
Volunteering Experience
Accomplishments
Certification
Timeline
Generic

Defi Mediana

Senior Data Analyst And Data Mentor
Jakarta Selatan

Summary

Data analytics professional with 5+ years of experience in top tech companies across Southeast Asia, helping businesses solve complex challenges through data-driven solutions, experimentation, and machine learning. Skilled in SQL, Python, and data visualization, with a strong track record of turning insights into strategies that drive growth and efficiency. Passionate about sharing knowledge, proved by experience in mentoring junior analysts, teaching in bootcamps, ocassionally providing one-on-one mentorship for university student and speaking at universities to support the next generation of data professionals. Dedicated to transforming data into actionable intelligence that sparks innovation and business impact.

Overview

6
6
years of professional experience
3
3
Certifications

Work History

Data and AI Mentor

DQLab
01.2025 - Current
  • Mentored 20-40 people in live online classes (bootcamp format). Audience ranging from high school students to young professionals
  • Improved materials that were given by DQLab
  • Reviewed participants' portfolio and provided feedback


Senior Data Scientist (Analytics)

Grab
10.2023 - Current
  • Worked closely with PM, designer, software engineers, upper management, university professors, and C-levels in creating Merchant AI Assistant to empower merchant in improving their business improvement. The feature helps merchant boost their revenue by xx%
  • Implemented clustering model and LLM-generation classification to analyse chat conversation
  • Mentored fellow analyst in using LLM for analysis in general and to analyse chat conversation

Data Scientist (Analytics)

Grab
05.2022 - 09.2023
  • An analyst who contributes on enabling better engagement between Grab and merchant through influencing decision on merchant app design
  • Setting ground truth on merchant-related engagement metrics
  • Increase merchant app inbox engagement rate by 12%
  • Leading effort to increase communication email success rate from
  • Support in integrating the merchant app with 3rd party messaging app, resulting in 3x more reach

Senior Business Intelligence Analyst - 3PL Management (Logistic)

Shopee
01.2022 - 05.2022
  • Lead BI 3PL Management Operations team with 4 subordinates

Business Intelligence Analyst - 3PL Management (Logistic)

Shopee
01.2021 - 12.2021
  • - Collaborate with FP&A, logistic operations, and business development team to minimize overall logistic cost. Logistic cost is decreased by 25% during the tenure
  • - Be the pioneer to explore and main PIC of operating several crucial logistic products
  • - Work together with the product management team to analyze issues and make product improvement plans
  • - Do feasibility study and price analysis
  • - Create and maintain 3PL order forecast algorithm
  • - Build several critical tables with data engineer to improve query time and data quality

Business Intelligence Analyst - Service by Shopee

Shopee
10.2019 - 01.2021
  • - Derive insights from big data on marketing, supply chain, and operations metrics
  • - Collaborate with the business development team to monitor and improve business performance
  • - Work together with the regional product team to establish and improve supply chain product
  • - Create the framework for A/B testing and do marketing experiments
  • - Monitor SKU forecast accuracy

Education

MBA - Industrial Management

National Taiwan University of Science And Technology
Taipei
04.2001 -

Master of Science - Industrial Engineering

Universitas Gadjah Mada (UGM)
Yogyakarta
04.2001 -

Bachelor of Engineering (B.Eng.) - Industrial Engineering

Universitas Gadjah Mada (UGM)
Yogyakarta
04.2001 -

Skills

  • Looker
  • Tableau
  • PowerBI
  • Data Analysis
  • Excel functions
  • SQL
  • Machine Learning
  • Python programming
  • Analytical thinking
  • Statistical analysis
  • Data visualization and presentations
  • ETL processes
  • A/B testing

Volunteering Experience

  • Guest Speaker for New Student Orientation – Universitas Gadjah Mada (Sep 2024)
    Delivered an offline session to 100+ Industrial Engineering students, sharing insights about the data industry and practical tips on building essential skills during their academic journey.
  • Private Data Mentor for Industrial Engineering Students, Universitas Gadjah Mada (2023–2024)
    Provided 1:1 and small-group mentorship for final-year students aspiring to become data analysts or data scientists. Conducted virtual sessions covering topics such as data fundamentals, CV review, mock interviews, and case study practice.

Accomplishments

    - The Grab Way Award H1'25

    Tightly-reviewed regional recognition award for employee with top-level performance. Only less than 5% employees across all Grab countries receive this award half-yearly

    - Grab CEO BOLD Award H2'24

    An award for team with the boldest idea and execution. Received this award for being able to deliver a complex 0-to-1 product with the newest technology in swift iterations, resulting in increased merchant's GMV and campaign spend

    - The Grab Way Award H2'22

    Tightly-reviewed regional recognition award for employee with top-level performance. Only less than 5% employees across all Grab countries receive this award half-yearly

Certification

Marketing Analytics (Coursera)

Timeline

Data and AI Mentor

DQLab
01.2025 - Current

Senior Data Scientist (Analytics)

Grab
10.2023 - Current

Microsoft Power BI - The Practical Guide (Udemy)

05-2022

Data Scientist (Analytics)

Grab
05.2022 - 09.2023

Senior Business Intelligence Analyst - 3PL Management (Logistic)

Shopee
01.2022 - 05.2022

Business Intelligence Analyst - 3PL Management (Logistic)

Shopee
01.2021 - 12.2021

Applied Text Mining in Python (Coursera)

10-2020

Marketing Analytics (Coursera)

06-2020

Business Intelligence Analyst - Service by Shopee

Shopee
10.2019 - 01.2021

MBA - Industrial Management

National Taiwan University of Science And Technology
04.2001 -

Master of Science - Industrial Engineering

Universitas Gadjah Mada (UGM)
04.2001 -

Bachelor of Engineering (B.Eng.) - Industrial Engineering

Universitas Gadjah Mada (UGM)
04.2001 -
Defi MedianaSenior Data Analyst And Data Mentor