Beginner Challenges
Real-world scenarios at the beginner level. Earn verified credentials as you practice the work your degree prepares you for.
- CodeBeginnerNew
Convert an Imperative Recommendation Service to Pure Functional Style
Take the Python ranking module (around 900 lines). Identify side-effects (DB reads, cache lookups, logging, time) and lift them to the boundary. Rewrite the ranking core in Scal…
- Scala Programming
- Pure Functions
- Functional Core Imperative Shell
Open coursework - AnalysisBeginnerNew
Interpretable-by-Design GAM for an Insurer's Claims Triage
You receive an anonymized claims dataset (around 60,000 claims, target: log reserve), a feature schema (22 features), and an existing LightGBM baseline (held-out R^2 of 0.78). T…
- Generalized Additive Models
- Ebm
- Interpretability
Explainable and Interpretable AI - AnalysisBeginnerNew
Code-Smell Triage Workshop for a Hiring-Platform Backend
Run static analysis (SonarQube + a custom ruleset for domain-specific smells) on the four most-touched services. Score each smell on the 22-item Fowler catalog by occurrence cou…
- Code Smells
- Static Analysis
- Refactoring Prioritization
Open coursework - StrategyBeginnerNew
Revamping Loyalty for a Mexico City D2C Cosmetics Brand
You are hired as a marketing analyst. Analyze Brillo Natural's existing customer data (provided in a simulated dataset) to identify purchase patterns and decision triggers. Prop…
- Consumer Psychology
- Segmentation
- Loyalty Program Design
Open coursework Practice your coursework on real scenarios.
Every challenge is shaped from real-world context — not generic exercises. The work mirrors what your degree prepares you for.
Why Ewance
- StrategyBeginnerNew
Pitch a Regulatory Sandbox Application for an Edtech AI Product
Read the EU AI Regulation's regulatory-sandbox provisions. Pick a member-state sandbox program (Spain, Norway-as-EEA, or a German-state pilot are publicly documented options) an…
- Regulatory Analysis
- Ai Governance
- Product Strategy
Open coursework - DesignBeginnerNew
Detect Sensor Drift for a Field Inspection Robot Fleet
You receive 60 days of telemetry from 12 robots, including IMU readings, camera exposure stats, and the inspection-quality scores produced downstream. Define drift signals (roll…
- Anomaly Detection
- Change Point Detection
- Sensor Fusion
Open coursework - StrategyBeginnerNew
Automated Testing Strategy for a Fintech App
Your task is to create a detailed testing strategy document for PayFlow's mobile app. Include a test pyramid diagram, tool recommendations (e.g., Jest, Detox, Cypress), and a pl…
- Test Automation
- Ci Cd
- Test Strategy
Open coursework - AnalysisBeginnerNew
Diagnose Query Failures in an E-Commerce Search Box
You receive 6 months of anonymized query logs (~480 million rows): query string, language hint, results-shown count, top-3 product clicks, and add-to-cart events. Build a notebo…
- Query Log Analysis
- Clustering
- Ir Failure Analysis
Open coursework - Browse challenges
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- AnalysisBeginnerNew
Define SLOs and Error Budgets for a Real-Time Trading API
Pull 90 days of API latency + error data per endpoint from Prometheus (anonymized exports provided). Propose Service Level Indicators (SLIs) for 3 services × 2 SLI types (availa…
- Slo Definition
- Error Budgets
- Sli Design
Site Reliability Engineering - AnalysisBeginnerNew
Audit Data Quality for a Climate Tech Sensor Network
You receive 30 days of ingested sensor data (around 400 million rows) plus the sensor inventory and known maintenance windows. Define a set of data-quality expectations (null ra…
- Data Quality
- Great Expectations
- Anomaly Detection
Data Engineering and Big Data Systems - StrategyBeginnerNew
Rebuild Rheinische Post's Digital Revenue Model in 12 Months
Using only the de-identified internal record (rp-case-file) and the monthly audience-and-revenue history (rp-metrics), map Rheinische Post's current business model on a Business…
- Business Model Canvas
- Digital Transformation
- Value Proposition Design
Open coursework - AnalysisBeginnerNew
Streamlining Returns for a Tokyo D2C Cosmetics Startup
Your task is to model the current (as-is) returns process in BPMN, analyze it for inefficiencies, and design a to-be process that automates key steps, reduces handling time by 5…
- Bpmn Modeling
- Process Analysis
- Bottleneck Identification
Open coursework Build a verifiable portfolio.
Submissions become evidence. Reviewers with shipping experience score against a rubric; the result becomes a credential anyone can verify.
Why Ewance
- DesignBeginnerNew
Design a Lexer and Parser for a Customer Query Language
Using the grammar sketch, the query corpus sample, the Abstract Syntax Tree schema, and the edge-case suite provided to you, write a design proposal for a new lexer and parser t…
- Lexing
- Recursive Descent Parsing
- Abstract Syntax Trees
Open coursework - CodeBeginnerNew
Issue Triage Bot for a Popular Eclipse Foundation Project
Read the project's existing labels, issue templates, and last 800 issues. Build a Go (or Python) GitHub Action that runs on issue_opened and issue_edited events. Implement heuri…
- Issue Triage
- Oss Contribution
- Github Actions
Open coursework - CodeBeginnerNew
Build a Video-Question-Answering Demo on a Budget
Pick the model (Video-LLaVA, VideoChat2, or LLaVA-Video) and justify on the A10G budget. Build a Streamlit demo: upload video, ask question, get answer with cited frame timestam…
- Video Language Models
- Multimodal Fusion
- Streamlit
Open coursework - AnalysisBeginnerNew
Investigate Churn Drivers for NordicGlow Cosmetics Customers
Work only from the two materials NordicGlow has handed you: the customer behaviour dataset (ds-nordicglow-customers) and the founder's retention brief (brief-nordicglow-ceo). Be…
- Data Preprocessing
- Feature Engineering
- Classification
Open coursework - CodeBeginnerNew
Implement a Distance-Vector Routing Algorithm
Implement distance-vector routing in Python: each simulated router maintains a distance vector, exchanges vectors with neighbors every 1 second of simulated time, and updates it…
- Routing
- Distance Vector
- Network Simulation
Open coursework - DesignBeginnerNew
Generative AI Content Strategy for a Sustainable Fashion Brand
You must first define EcoWeave's brand voice by analyzing their existing content (provided). Then, design a set of prompts and a workflow (e.g., using ChatGPT or a no-code AI to…
- Prompt Engineering
- Content Strategy
- Brand Voice
Data-Driven Prototyping with AI - StrategyBeginnerNew
Plot a Diversification Path for a Nairobi Skincare Brand
Using the founder's company case file, the product portfolio sales dataset, and the category attractiveness readout provided to you, run a portfolio analysis (the BCG growth-sha…
- Portfolio Analysis
- Market Research
- Strategic Thinking
Open coursework - CodeBeginnerNew
Build a Product Knowledge Graph for a Fast-Fashion Retailer
You receive 200 sample SKUs across 4 markets (Spain, Germany, Japan, Brazil) as CSVs with country-specific attribute names. Design an OWL ontology with shared classes for Produc…
- Knowledge Graphs
- Owl Ontology
- Rdf
Open coursework - CodeBeginnerNew
Segment Solar Panels in Aerial Imagery for an Energy Audit Startup
You receive 600 labelled 1024x1024 orthophoto tiles (panel masks) and 1,000 unlabeled tiles. Train a segmentation model (U-Net or DeepLabV3+ baseline), validate at 0.85 IoU on a…
- Semantic Segmentation
- U Net
- Aerial Imagery
Open coursework - AnalysisBeginnerNew
Wage Compression at a San Francisco D2C Cosmetics Startup
Your task is to analyze the startup's current wage data (provided in a simulated dataset), identify the extent of wage compression, and recommend a wage adjustment plan. Success…
- Wage Analysis
- Market Benchmarking
- Data Visualization
Open coursework - DesignBeginnerNew
Redesign an Executive Revenue Dashboard for an E-Commerce Marketplace
Interview the CFO, the head of category, and 2 finance analysts for 30 minutes each to elicit the 6 analytic tasks the dashboard must support (e.g. month-over-month variance, ca…
- Dashboard Design
- Visual Encoding
- Task Analysis
Information and Data Visualization - CodeBeginnerNew
Build a Crawler-and-Topic Pipeline for Public-Sector Web Analytics
You will build a polite, robots.txt-respecting crawler that ingests about 30,000 new posts/week across the 80 forums into a normalized dataset. Apply a topic model (BERTopic, wi…
- Web Crawling
- Topic Modeling
- NLP Pipeline
Open coursework
How it works
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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