Dwi Sasongko

Statistics Graduate

Surabaya, Indonesia

Available for work

About me

Hello, I'm Dwi — a fresh graduate of Statistics, Institut Teknologi Sepuluh Nopember (ITS) Surabaya with 4 years of academic training in statistical modeling, data analytics, and machine learning. I've worked across BPS, fintech, and consumer research — combining rigorous methodology with practical business questions to turn messy data into actionable insight.

Right now I'm exploring opportunities in data science, risk analytics, and product analytics — particularly at fintech, consumer tech, or government research institutions. Beyond technical work, I enjoy mentoring junior students on R + Python at the Statistical Computing Lab, and writing data-driven essays on Indonesia's economic and demographic trends.

Some of my projects

Customer Churn Prediction — Telco Indonesia

Machine Learning · XGBoost · 89% AUC

Indonesia GDP Forecasting — ARIMA + Prophet

Time Series · 2000-2024 Q4 Forecast

E-commerce A/B Test — Checkout Flow

Causal Inference · +12% Conversion

BPS Poverty Mapping — Geospatial Analysis

Geographically Weighted Regression

Bayesian Pricing Model — Fintech

PyMC · Hierarchical Bayes

Survey Sampling Design — National Health Study

Stratified Multi-stage · n=12,000

Experience

G
GoTo Financial — TokopediaData Analyst Intern
Jun 2024 - Sep 2024
3-month internship di GoTo Financial data team. Built customer segmentation model untuk lending product (clustering K-Means + RFM analysis). Output dipresentasikan ke 2 PM senior, jadi basis personalisasi recommendation engine untuk 1.2M user segment.
B
Badan Pusat Statistik (BPS) — Jawa TimurSurvey Methodology Assistant
Jan 2024 - May 2024
Part-time research assistant di BPS Jatim. Membantu desain sampling untuk Survei Sosial Ekonomi Nasional (SUSENAS) 2024 — stratified multi-stage cluster sampling untuk 3,200 RT di 6 kabupaten. Co-authored 1 internal report tentang non-response bias.
B
Bank Mandiri — Risk Analytics LabQuantitative Research Intern
Sep 2023 - Dec 2023
Magang di Mandiri Risk Lab. Mengembangkan credit scoring model proof-of-concept (logistic regression + gradient boosting), dengan dataset 80K loan applications. Model approved untuk pilot test (Q1 2024) — KS statistic 0.42.

Education

I
Institut Teknologi Sepuluh Nopember (ITS) — SurabayaBachelor of Statistics (S.Stat) — Computational Statistics Concentration
Aug 2020 - Jul 2024
GPA 3.82/4.00 (Cum Laude). Concentration: Computational Statistics + Machine Learning. Bachelor thesis on Bayesian hierarchical models untuk Indonesia poverty mapping. Aktif di HIMASTA + Statistical Computing Lab assistant.
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SMA Negeri 5 SurabayaSenior High School — Natural Sciences (IPA)
Jul 2017 - May 2020
IPA track. Aktif di Karya Ilmiah Remaja (KIR) — Juara 2 Olimpiade Sains Nasional Matematika tingkat provinsi 2019.

Additional Experience

H
HIMASTA-ITS (Himpunan Mahasiswa Statistika)Head of Academic Affairs
Aug 2022 - Jul 2023
Memimpin programming akademik untuk 220+ mahasiswa Statistika ITS. Organized 6 statistical computing workshops (R + Python), Data Science Competition 2023 (45 teams nasional), + ITS Statistics Career Fair 2023.
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Statistical Computing Lab ITSLaboratory Assistant
Sep 2022 - May 2024
Lab assistant untuk 4 mata kuliah: Komputasi Statistika, Analisis Regresi, Time Series, Multivariate Analysis. Mengajar pemrograman R + Python untuk 180+ mahasiswa per semester.
I
Indonesia Statistics Society — Student ChapterResearch Volunteer
Jan 2023 - Dec 2023
Volunteer di ISS Indonesia. Membantu 3 community research projects tentang akses pendidikan + healthcare di Jawa Timur. Co-authored 1 conference poster (SemNas Statistika 2023).

Recognition

Best Bachelor Thesis — Computational Statistics
Department of Statistics, ITS
2024Certificate
1st Place — Data Science Competition (DataFest 2023)
Institut Teknologi Bandung (ITB)
2023Certificate
Top 5 — Statistics Olympiad National (OSN-PT)
Kementerian Pendidikan dan Kebudayaan
2023Certificate
Dean's List — Semester 5, 6, 7
Faculty of Science and Data Analytics, ITS
2022 - 2023Certificate
Beasiswa Unggulan Kemendikbud
Kementerian Pendidikan, Kebudayaan, Riset, dan Teknologi
2021 - 2024Certificate

Certifications

Google Data Analytics Professional Certificate
Google (via Coursera)·Data Analytics
Sep 2024 View
IBM Data Science Professional Certificate
IBM (via Coursera)·Data Science
Aug 2024 View
Microsoft Power BI Data Analyst Associate (PL-300)
Microsoft·Business Intelligence
Jun 2024 View
Tableau Desktop Specialist
Tableau (Salesforce)·Data Visualization
May 2024 View
AWS Certified Cloud Practitioner (CLF-C02)
Amazon Web Services·Cloud Computing
Apr 2024 View
Statistical Methods for Decision Making
Stanford University (via Coursera)·Statistics
Mar 2024 View
Bayesian Statistics Specialization
University of California Santa Cruz (via Coursera)·Statistics
Jan 2024 View
Machine Learning Specialization
DeepLearning.AI + Stanford (Coursera)·Machine Learning
Dec 2023 View
SAS Programming Specialist
SAS Institute·Statistical Programming
Nov 2023 View
TOEFL ITP — Score 587
ETS·English Proficiency
Aug 2023 View

Skills

Statistical Modeling

Regression · GLM · Mixed Models

Machine Learning

Supervised + Unsupervised + Ensemble

Bayesian Inference

MCMC · PyMC · Stan · BUGS

Time Series Analysis

ARIMA · Prophet · State Space

Causal Inference

A/B Testing · DiD · IV · RCT

Survey Methodology

Sampling Design · Weighting · Imputation

Data Visualization

ggplot2 · Plotly · Tableau · Power BI

Big Data & SQL

PostgreSQL · BigQuery · Spark

Experiment Design

Factorial · Power Analysis · Sample Size

Geospatial Analysis

GIS · GWR · Spatial Autocorrelation

Natural Language Processing

Text Mining · Sentiment · Topic Modeling

Mathematical Statistics

Probability Theory · Asymptotics · Decision Theory

Tech Stack

Python

SQL

Stata

SPSS

SAS

Jupyter

RStudio

VS Code

Tableau

Power BI

Looker Studio

Excel

Google Sheets

BigQuery

PostgreSQL

Git + GitHub

AWS

Notion

Slack

Recommendations

Dr. Suhartono, M.Sc., Ph.D.
Thesis Advisor, Department of Statistics ITS
July 2024
Dwi shows exceptional technical depth — his Bayesian hierarchical model for Indonesia poverty mapping was published-quality. He bridges statistical rigor with practical computational implementation rare in undergrad students.
View Letter
Andini Rahmawati, M.Sc.
Senior Data Scientist, GoTo Financial
September 2024
Self-directed and analytically sharp. Dwi delivered a customer segmentation model in 6 weeks that's now in production. Strong fundamentals + ability to translate business questions into statistical frameworks.
View Letter
Drs. Bambang Wijaya, M.Stat.
Senior Statistician, BPS Jawa Timur
May 2024
Methodologically careful + meticulous with sampling design. Dwi's contribution to SUSENAS 2024 weighting scheme was technically solid. Future government statistician material.
View Letter