Data Sciences Challenges
Explore data science challenges on Ewance to build skills employers expect from analysts and ML engineers. Work through challenges on data cleaning, exploratory analysis, modeling, and storytelling with data.
Most Popular
- ResearchSeniorNew
Benchmark Conformal Prediction for a Healthcare Risk-Score
You receive a labeled dataset of about 25,000 patient encounters with the current risk-score's predictions and ground-truth 1-year outcomes. Implement and compare split conforma…
- Conformal Prediction
- Uncertainty Quantification
- Calibration
Statistical Machine Learning - ResearchSeniorNew
Multi-Tenant Vector Isolation for a B2B Knowledge Assistant
Build a small proof-of-concept in your chosen vector store (Pinecone or Qdrant — pick one and justify) that supports 10 simulated tenants with 1,000 vectors each. Implement the …
- Multi Tenant Isolation
- Vector Databases
- Threat Modeling
Vector Databases and Embeddings - AnalysisSeniorNew
Investigate Coffee-Price and Euro Risk for a Vietnamese Exporter
Investigate using only the materials provided. First, observe the real market: track how the Intercontinental Exchange (ICE) robusta coffee futures settlement price and the euro…
- IFRS 9
- Hedge Accounting
- Derivatives
Open coursework - AnalysisSeniorNew
Assess Partnership Risk for WellsTrade's Instant Payments Launch
Using the PayFlow due-diligence data room and the eighteen-month PayFlow operational metrics dataset, identify and quantify the operational, security, compliance, and reputation…
- Operational Risk
- Vendor Risk
- Cybersecurity
Open coursework Develop in-demand professional skills.
Each challenge names the skills it strengthens. Over time, your profile fills with the competences a hiring manager would actually look for.
Why Ewance
- ResearchSeniorNew
Experimental Design for a Fintech App's Savings Nudge
You are a behavioral data scientist at SaveSmart. Design a randomized controlled trial (RCT) to test the effect of a 'future self' nudge on savings behavior. Define treatment an…
- Experimental Design
- Statistical Analysis
- Nudge Theory
Behavioral Economics - CodeSeniorNew
Real-Time Sentiment Analysis for a Sustainable Fashion Brand
You are to develop a real-time sentiment analysis system for EcoWear. Ingest data from Twitter API (hashtag #EcoWear) and a mock review API, process using Spark Streaming with M…
- Spark Streaming
- Mapreduce
- Nosql
Big Data and Cloud Technologies - StrategySeniorNew
Design a Circular Business Model for EcoWear
Acting as EcoWear's business model innovation analyst, examine the EcoWear company file, the customer behavior dataset, the operations brief, and the circular economy industry r…
- Circular Economy
- Business Model Canvas
- Financial Modeling
Open coursework - StrategySeniorNew
Investigate Germany's Market for EcoThreads' Entry
Your task is to investigate the German sustainable fashion market and produce a recommended entry strategy for EcoThreads. Start from the company facts in the EcoThreads briefin…
- Market Entry
- Competitive Analysis
- Regulatory Analysis
Open coursework - Browse challenges
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Pricing Strategist
Set the price that captures value without leaving sales on the table. Demand modelling, willingness-to-pay research, and the disciplined experimentation that turns pricing into a competitive advantage.
- ResearchSeniorNew
Neuromarketing Audit for a Sustainable Fashion Retailer
Your team will design and simulate a neuromarketing experiment. First, propose two alternative store layouts (e.g., circular vs. grid) and two website homepage designs (e.g., he…
- Neuromarketing
- Experimental Design
- Eye Tracking Analysis
Consumer Behavior - AnalysisSeniorNew
M&A Strategy: Should Precision Parts Acquire MicroGears?
Using the financial-data workbook and the industry benchmarks memo provided, value MicroGears Ltd. two ways — a discounted-cash-flow analysis and a comparable-transactions analy…
- Mergers And Acquisitions
- DCF Valuation
- Synergy Estimation
Open coursework - DesignSeniorNew
Designing a Data Warehouse for a Renewable Energy Firm
You are given sample data from three sources: energy production logs, weather data, and equipment maintenance records. Your task is to: (1) design a star schema with fact and di…
- Data Warehousing
- Star Schema
- Etl
Database Systems - DesignSeniorNew
Design a Multi-Objective Dynamic Pricing Engine for CityRide
Acting as a data scientist on CityRide's pricing team, design and prototype a dynamic pricing engine that, given the live time, pickup zone, and supply-demand conditions, quotes…
- Reinforcement Learning
- Optimization
- Simulation
Open coursework Get recognized by recruiters and employers.
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Why Ewance
- AnalysisSeniorNew
Financial Statement Analysis for a Renewable Energy Firm
Your team must analyze SunPower's last three years of financial statements (income statement, balance sheet, cash flow statement) and ESG reports. Calculate key ratios (liquidit…
- Financial Statement Analysis
- Ratio Analysis
- Dupont Analysis
Open coursework - DesignSeniorNew
Designing a Market-Making Strategy for a New ETF
You are a quantitative analyst at Nova Capital. The new ETF (ticker: AIRO) will track 30 AI and robotics stocks with daily rebalancing. The initial AUM is $200 million. Your tas…
- Market Microstructure
- Etf Arbitrage
- Risk Management
Open coursework - StrategySeniorNew
Blockchain-Based Supply Chain Traceability Strategy
You are hired by the manufacturer's innovation team. Research existing blockchain traceability solutions in luxury goods (e.g., LVMH's AURA, Breitling's use of blockchain), asse…
- Blockchain Strategy
- Supply Chain Analysis
- Cost Benefit Analysis
Fintech and Digital Finance - AnalysisSeniorNew
Backtest a Gilt-Versus-Corporate-Bond Spread Strategy
Using the supplied two-year daily market-history dataset of gilt and corporate-bond yields, prices, and bid-ask spreads, design and backtest a long-short relative value strategy…
- Fixed Income Arbitrage
- Yield Spread Analysis
- Backtesting
Open coursework - ResearchSeniorNew
Blockchain Pilot for Coffee Supply Chain Traceability
Your task is to propose a blockchain pilot project for one coffee origin (choose Colombia). Define the data to be captured at each supply chain node (farm, mill, exporter, roast…
- Blockchain In Supply Chain
- Traceability
- ROI Analysis
Global Supply Chain Management - AnalysisSeniorNew
Time a 500-Million-Euro Solar Investment to the Eurozone Cycle
You are SunVista's economic analyst, and the Chief Financial Officer has asked you for a decision-ready report that guides the timing of the 500-million-euro solar build-out. Wo…
- Business Cycle Analysis
- Macroeconomic Forecasting
- Investment Timing
Open coursework - AnalysisSeniorNew
Commodity Index Rebalancing for a Multi-Asset Fund
Your task is to conduct a quantitative analysis of commodity index rebalancing methodologies and recommend a new approach for the fund. Compare at least three different commodit…
- Commodity Indices
- Index Rebalancing
- Portfolio Optimization
Hedge Funds and Alternative Investments - DesignSeniorNew
Auction Design for Renewable Energy Subsidies
Your team must design an auction mechanism for allocating subsidies to offshore wind projects. You have historical bid data from past auctions, cost estimates for different tech…
- Auction Theory
- Mechanism Design
- Game Theory
Industrial Economics and Game Theory - StrategySeniorNew
International Expansion Strategy for a Fintech Startup
You are a strategy team of 3. Analyze three target markets (Indonesia, Vietnam, Philippines) using macroeconomic data, regulatory barriers, and competitive landscape. Recommend …
- Market Entry Strategy
- Macroeconomic Analysis
- Regulatory Analysis
International Economics - CodeSeniorNew
Forecasting Exchange Rates for a 40-Person SaaS Scale-Up
Your task is to collect monthly data for the past 5 years for GBP/USD and EUR/USD, along with relevant predictors (interest rate differentials, inflation, GDP growth, trade bala…
- Time Series Forecasting
- Econometric Modeling
- Python
International Finance - StrategySeniorNew
Bring GreenVolt's Offshore Structure Into ATAD Compliance
Using the group structure case file and the entity financials dataset provided to you, and reading the directive against the official ATAD text supplied as a source link, design…
- Cfc Rules
- Atad
- Tax Restructuring
Open coursework - AnalysisSeniorNew
Data Protection Impact Assessment for a Fintech App
You are the data protection officer (DPO) for the fintech. Perform a DPIA for the new AI-driven loan feature, following ICO guidelines. Identify at least 5 key risks, rate them …
- GDPR Compliance
- Data Protection Impact Assessment
- Risk Management
IT Governance and Security
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From brief to credential, in six steps.
Step 01
Browse challenges aligned to your studies.
Step 02
Accept the one that fits your goals.
Step 03
Work through it with AI Copilot guidance.
Step 04
Submit for structured evaluation.
Step 05
Earn a verified credential.
Step 06
Add it to LinkedIn with one click.
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