Wei Chen
Senior Data Scientist · Singapore
Forecasts that people trust enough to act on.
In [1]:
print(wei.bio)Out[1]:I build forecasting and experimentation systems for marketplaces. My favourite result is a model that gets switched off because the process it fixed no longer needs it.
Previously at Grab and Shopee; now leading forecasting at a logistics scale-up.
In [2]:
wei.impact.plot(kind="barh")Out[2]:
annual savings$4M
churn−38%
MAPE12%
In [3]:
wei.projects[["title", "year", "result"]]Out[3]:
| title | year | result | |
|---|---|---|---|
| 0 | Demand forecast v3 | 2024 | Weekly demand for 14k routes. MAPE down from 31% to 12%; saves about $4M a year in empty trucks. |
| 1 | Onboarding experiment | 2023 | Six onboarding paths tested on 90k shippers; the winner cut 90-day churn by 38%. |
| 2 | Delivery delay model | 2022 | Predicted late deliveries 20 minutes earlier, so support could message customers first. |
In [4]:
Demand forecast v3 — Python, LightGBM, dbt
display(wei.projects.figure(0)) # Demand forecast v3Out[4]:
In [5]:
Onboarding experiment — SQL, Bayesian A/B
display(wei.projects.figure(1)) # Onboarding experimentOut[5]:
In [6]:
Delivery delay model — PyTorch, Spark
display(wei.projects.figure(2)) # Delivery delay modelOut[6]:
In [7]:
wei.experience.sort_values("start", ascending=False)Out[7]:
| company | role | start | end |
|---|---|---|---|
| Kargo | Senior Data Scientist | 2023 | Present |
| Grab | Data Scientist | 2019 | 2023 |
| Shopee | Analyst | 2017 | 2019 |
- Kargo: Lead forecasting; team of three.
- Grab: Delivery ETA and dispatch experiments.
- Shopee: Pricing and promotions analytics.
In [8]:
!pip list --userOut[8]:Package Version -------------------- ------- python latest sql latest time-series latest causal-inference latest experimentation latest dbt latest spark latest pytorch latest
## Talks & recognition
- Forecasts nobody uses — Talk, PyData Singapore (2024)
- Kaggle Competitions Master (2021)
## Education
- MSc Statistics, National University of Singapore (2017)
In [9]:
wei.contact()Out[9]:- email wei@example.com
- github github.com/
- linkedin www.linkedin.com/
✓ Open to lead roles in forecasting