Beginner Challenges

Real-world scenarios at the beginner level. Earn verified credentials as you practice the work your degree prepares you for.

DisciplineAll Analysis Code Design Strategy Research Presentation

LevelAll Foundational Beginner Intermediate Senior

SkillsBrowse skill families

AnalysisBeginnerNew
Postmortem and Action-Item Tracking for a 3-Service Outage
Re-write the existing postmortem using the Google SRE blameless format: timeline (anchored to UTC), what went well, what went poorly, where we got lucky, action items (S.M.A.R.T…
- Postmortems
- Blameless Culture
- Action Item Tracking
Open coursework
CodeBeginnerNew
Build a Credit-Card Fraud Detector for a Singapore Neobank
You receive 9 months of anonymized authorization data (around 8 million transactions, around 0.4 percent fraud) plus current rule outcomes. Split temporally and train at least t…
- Classification Modeling
- Class Imbalance
- Model Calibration
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
CodeBeginnerNew
Knowledge-Graph Recommender for a Lisbon Bookstore
Using the catalog sample (catalog_sample), build a knowledge graph whose nodes are books, authors, genres, themes, eras, and awards, and whose edges capture relationships such a…
- Knowledge Representation
- Knowledge Graphs
- Python Programming
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
CodeBeginnerNew
Model a Trading Order Book with Algebraic Data Types in Haskell
Design ADTs for Side (Buy | Sell), OrderType (Limit | Market | StopLimit), Order, Trade, and BookState. Make illegal states unrepresentable (e.g. a Match can never produce a neg…
- Haskell
- Algebraic Data Types
- Property Based Testing
Functional Programming
CodeBeginnerNew
Apply Property-Based Testing to a Currency-Conversion Module
Rewrite the conversion module in F#: use units of measure for currency types, immutable value types for amounts, no floating-point arithmetic (Decimal only). Build property test…
- Fsharp
- Property Based Testing
- Fscheck
Functional Programming
CodeBeginnerNew
Implement Async Message-Passing for an IoT Gateway
Receive the current gateway source (Python 3.11, single-threaded paho-mqtt client + a serial HTTP forwarder, ~1,100 lines), a sensor-simulator that fans out 500 mock sensors at …
- Async Programming
- Message Passing
- Asyncio
Concurrent and Parallel Programming
AnalysisBeginnerNew
Design a Currency Hedging Policy for GlowAustin's EU and Japan Revenue
You are a junior financial analyst at GlowAustin, and the CFO has asked you to prepare a hedging proposal for the next fiscal year. Working from the provided two-year revenue-an…
- Fx Risk Management
- Financial Analysis
- Derivatives
Open coursework
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Strategy Analyst
Frame the business question, model the options, build the recommendation. From market sizing to competitive analysis, this role is where strategy consulting meets in-house decision-making.
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CodeBeginnerNew
Build PR-Based Environment Promotion for an HVAC SaaS
Using the provided GitOps starter repository sample and the promotion specification, stand up Flux v2 with its image-reflector and image-automation controllers and define semant…
- Flux
- Image Automation
- Github Actions
Open coursework
StrategyBeginnerNew
Design an Open Innovation Pilot for GlowUp Naturals
Acting as a junior innovation consultant hired by GlowUp Naturals, design a six-month open innovation pilot and present it to the chief executive. Ground every recommendation in…
- Open Innovation
- Partner Scouting
- Ip Management
Open coursework
AnalysisBeginnerNew
IT Security Risk Assessment for a FinTech Mobile App
Using the provided architecture diagram and API documentation, perform a risk assessment covering: (1) Threat modeling using STRIDE, (2) Vulnerability identification across mobi…
- It Security
- Requirements Engineering
- Web Development
Open coursework
AnalysisBeginnerNew
Spectral-Analyze Wearable Sleep Data for a Healthtech Pilot
You receive 30 nights of wearable data per 25 volunteers, with polysomnography-derived ground-truth stages (Wake / NREM / REM). Engineer spectral features (delta, theta, alpha, …
- Spectral Analysis
- Feature Engineering
- Wavelet Analysis
Open coursework
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Credentials are blockchain-anchored via LearnCoin — tamper-evident, portable, link-shareable on LinkedIn and beyond.
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CodeBeginnerNew
Build a Pricing-Aware Scheduling Agent for Smart Thermostats
Using only the materials provided, build an intelligent agent with four working parts: perception (read the sensor history), learning (cluster each household's comfort intervals…
- Intelligent Agents
- Basic Learning
- Python Programming
Open coursework
AnalysisBeginnerNew
Diagnose a Deadlock in a Multi-Threaded File Indexer
Clone the indexer repo (provided), set up reproduction with thread-sanitizer and helgrind, and produce a deterministic deadlock test case in under 5 minutes of runtime. Diagnose…
- Synchronization
- Deadlock Analysis
- C Programming
Operating Systems
ResearchBeginnerNew
Curate a Domain Lexicon for a Climate-Tech NLP Stack
You receive 5,000 policy documents and a benchmark of 200 documents with manually tagged domain terms. Curate a lexicon of ~1,500 terms with (1) canonical English form, (2) Swah…
- Lexical Resources
- Named Entity Recognition
- Spacy
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
GPU Cost Dashboard for an AI Consulting Practice
Pull AWS Cost and Usage Report, GCP billing export, and Lambda Labs invoices into a single Parquet table. Implement a tagging convention (project + client + experiment_id) and a…
- Cloud Cost Attribution
- Etl Pipelines
- Data Modeling
Cloud Computing for Data and ML
StrategyBeginnerNew
Hedge Fund Strategy for a Family Office Investing in Private Debt
Your task is to produce a comprehensive investment memo that recommends a specific private debt hedge fund strategy for the family office. Include a comparative analysis of the …
- Private Debt
- Hedge Fund Structures
- Due Diligence
Hedge Funds and Alternative Investments
StrategyBeginnerNew
Re-Energize CloudMetrics' Remote Sales Team During Its Enterprise Pivot
Design a 90-day motivation and communication plan for CloudMetrics' remote sales team. Ground your diagnosis in an established motivation theory (for example Self-Determination …
- Motivation Theories
- Remote Team Management
- Change Communication
Open coursework
CodeBeginnerNew
Refactor a Legacy Reporting Script for a Renewable-Energy Startup
Read the existing script and identify 5-7 distinct responsibilities tangled together. Refactor into 3 layers: data loaders (CSV, REST API), transformers (pure functions over row…
- Abstraction
- Higher Order Functions
- Refactoring
Programming Abstractions
CodeBeginnerNew
Implement a Constraint Solver for a Lisbon Tourism Scheduler
Model the next-week schedule as a CSP: variables are (guide, day, slot) assignments; domains are available routes; constraints encode language requirements, max consecutive tour…
- Constraint Satisfaction
- Backtracking Search
- Python
Introduction to Artificial Intelligence
CodeBeginnerNew
Build a Plugin-Based Notification Framework With Observer + Factory
Implement, in Java 21: an EventBus that supports typed subscriptions, a NotificationChannel interface with concrete subtypes (Push, Email, InApp, SMS), an AbstractChannelFactory…
- Java
- Design Patterns
- Oo Design
Object-Oriented Programming and Design
StrategyBeginnerNew
Reprice the Hero Serum for a Copenhagen Beauty Startup
Using the competitor price list, the customer purchase history, and the willingness-to-pay survey results provided to you, recommend a single new shelf price for the vitamin C s…
- Game Theory
- Pricing Strategy
- Market Analysis
Open coursework
AnalysisBeginnerNew
Acquisition of a Bangalore D2C Cosmetics Startup
As a junior M&A analyst at BeautyCo, you must assess GlowUp's business model, financials, and market position. You need to conduct a valuation using DCF and comparable company a…
- Financial Analysis
- Valuation
- Due Diligence
Open coursework

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Step 02
Accept the one that fits your goals.
Step 03
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Step 04
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Step 05
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