Intermediate Challenges
Real-world scenarios at the intermediate level. Earn verified credentials as you practice the work your degree prepares you for.
- AnalysisIntermediateNew
Amortized-Analysis Investigation of a Production Cache
Read the C++ cache source (around 1,800 lines, custom open-addressing with periodic resize-and-rehash). Perform amortized analysis using all three methods (aggregate, accounting…
- Amortized Analysis
- Functions & Data Structures
- Algorithm Analysis
Advanced Algorithms - ResearchIntermediateNew
Probe a Pretrained Encoder for Linguistic Knowledge
Take BERT-base (or DeBERTa-v3-base). Run layer-wise probes across at least 3 linguistic tasks: part-of-speech tagging, dependency arc classification, and semantic role labeling.…
- Interpretability
- Probing
- Hugging Face Transformers
Neural Networks for NLP - CodeIntermediateNew
RAG Faithfulness Evaluation for a Medical-Education Assistant
You receive 200 student-style questions, two RAG configurations (config A: vector-only + GPT-class generator; config B: hybrid + rerank + GPT-class generator), and the medical-t…
- RAG Evaluation
- Faithfulness
- LLM As Judge
Retrieval-Augmented Generation - StrategyIntermediateNew
Scaling a B2B SaaS Startup from PLG to Enterprise Sales
Your task is to create a business model transition plan for FlowSync. You must define the enterprise value proposition, propose a pricing model (e.g., usage-based, per-seat, tie…
- Product Led Growth
- Enterprise Sales
- Pricing Strategy & Elasticity
Digital Business Models 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
- CodeIntermediateNew
Build a Canary Rollout for a Production Recommender
Pick a serving stack (Triton, Seldon Core, KServe, or BentoML). Implement two-model traffic splitting with a configurable percentage (start at 5%). Wire up online metric collect…
- Canary Deployment
- Kubernetes Orchestration
- A/B Testing
ML Engineering and Production ML - AnalysisIntermediateNew
Decarbonizing a 40-Person SaaS Scale-Up's Supply Chain
As a carbon management analyst, you must quantify CloudSync's current carbon footprint (Scope 1, 2, 3), identify reduction levers, and propose a roadmap to carbon neutrality. Co…
- Carbon Footprinting
- Scope 3 Emissions
- Renewable Energy
Circular Economy and Sustainable Operations - CodeIntermediateNew
Build a Variant-Calling Pipeline for a Genomics SaaS
Stand up a Nextflow pipeline covering: read trimming, BWA-MEM alignment, duplicate marking, base-quality-score recalibration, GATK HaplotypeCaller variant calling, and variant f…
- Bioinformatics
- Variant Calling
- Workflow Orchestration
Computational Biology and Health Informatics - AnalysisIntermediateNew
Capital Adequacy for a Neobank Expansion
Your task is to develop a capital adequacy assessment for Nubank's expansion into Vietnam. You will estimate credit risk for a new consumer loan portfolio using the standardized…
- Basel Iii
- Capital Adequacy
- Risk Weighted Assets
Banking and Financial Institutions - Browse challenges
Explore role
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.
- CodeIntermediateNew
Build a Metered-Billing System for a Usage-Based SaaS
Build an event-ingest API (Express + Redis Streams) that receives usage events with idempotency keys. Aggregate hourly into Postgres rollups using a windowed worker that survive…
- Metered Billing
- Idempotency
- Event Aggregation
Engineering Software as a Service - CodeIntermediateNew
Build a Hybrid Recommendation System for an Indie Streaming Catalog
Use the provided 6-month anonymized event log (around 320M play events, 1.4M unique users in the held-out cohort), audio embeddings (256-d), and track metadata. Implement (1) an…
- Recommendation Systems
- Collaborative Filtering
- Content Based Recommendation
Data Mining and Information Retrieval - CodeIntermediateNew
Harden a Linux Container Runtime Against Privilege Escalation
Receive the pen-test report (with attack chain), the current cluster config (EKS 1.29, default Amazon Linux 2023 worker nodes), and 3 representative workload classes (web API, a…
- Os Security
- Linux Hardening
- Apparmor
Computer Systems Security - AnalysisIntermediateNew
Causal Impact of Ad Campaign for Sustainable Fashion Brand
You are given weekly sales data for EcoWear and a competitor (control) for 2022-2023. The campaign started in week 10 of 2023. Your task is to implement a DiD model, test the pa…
- Difference In Differences
- Causal Inference
- Time Series Basics
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Why Ewance
- StrategyIntermediateNew
Monetary Policy Impact on a SaaS Scale-Up's Expansion
You are a strategy consultant hired by DataFlow's CEO. Your task: (1) Analyze the current monetary policy stance of the Bank of England and at least two Southeast Asian central …
- Macroeconomic Analysis
- Monetary Policy
- International Finance
Global Economy and Macroeconomics for Managers - StrategyIntermediateNew
BEPS Risk Assessment for a SaaS Scale-Up Expanding to India
You are a tax analyst at CloudSync. The CEO wants a concise risk assessment and recommendation on whether to set up a subsidiary or a branch in India, considering the risk of cr…
- BEPS 2.0
- Permanent Establishment
- Profit Shifting
International Taxation of Multinationals - AnalysisIntermediateNew
Reverse-Engineer a 22-Year-Old COBOL Batch Pipeline
Use SonarQube + cobol-language tooling + JCL parsers to extract job dependencies and data-flow across the 140 jobs. Build a job-dependency graph (Graphviz). Run impact analysis:…
- Reverse Engineering
- Legacy Systems
- Dependency Analysis
Software Evolution and Maintenance - StrategyIntermediateNew
Market Entry Strategy for a 40-Person SaaS Scale-up
Your team must develop a market entry strategy for TaskFlow into German manufacturing. Constraints: budget of €500k for first year; must achieve 10 enterprise clients within 12 …
- Market Entry
- Competitive Strategy
- Game Theory
Managerial Economics - DesignIntermediateNew
Design Hybrid Search for an E-Commerce Product Catalog
You receive 80,000 anonymized product records (title, description, category, attributes) and a sample of 30,000 search log entries with click-through labels. Embed the catalog w…
- Hybrid Search
- Embedding Models
- Bm25
Vector Databases and Embeddings - AnalysisIntermediateNew
Privacy-by-Design Review for a Smart-City Data Platform
Map the new module's end-to-end data flow (sensors -> ingestion -> analytics -> dashboards -> exports). Run a Privacy Impact Assessment against OECD privacy principles + per-ten…
- Privacy By Design
- Privacy Regulation
- Compliance
Information Security Management and Governance - AnalysisIntermediateNew
Director Liability in a SaaS Scale-Up's Failed Enterprise Deal
Analyze the facts: the CEO, without board approval, promised a client custom features that the product team could not deliver, leading to contract termination and a £500K loss. …
- Director Duties
- Companies Act 2006
- Business Judgment Rule
Company and Corporate Law - StrategyIntermediateNew
Revitalizing a Legacy B2B SaaS Product
Your task is to create a comprehensive product revitalization plan. You must conduct at least 5 user interviews (or synthesize existing feedback), analyze product analytics (pro…
- User Research
- Product Analytics
- Roadmapping
Product Management - CodeIntermediateNew
Design an Anti-Corruption Layer for a Legacy Hospital EHR
Map the legacy EHR's HL7 v2 message schema (ADT, ORM, ORU segments) to the new platform's domain (Patient, Encounter, Order, Result). Identify the 6-10 anti-patterns in the lega…
- Anti Corruption Layer
- Hl7 Integration
- Domain Modeling
Domain-Driven Design - StrategyIntermediateNew
Succession Strategy for a German Mittelstand Manufacturer
You are a family business consultant hired by the advisory board. Your task is to develop a 3-year succession roadmap, including a governance structure (e.g., family council, bo…
- Succession Planning
- Governance Design
- Family Dynamics
Family Business Management - CodeIntermediateNew
Design a Saga Orchestrator for a Cross-Border Payments Flow
Model the payment flow as a saga: 6 forward steps + their compensations. Choose between orchestration (Temporal) and choreography (event-driven via Kafka) and defend the choice.…
- Saga Pattern
- Temporal Workflow
- Compensation Logic
Event-Driven Architecture - AnalysisIntermediateNew
Compare ML Compiler Stacks on a Vision Backbone
Take a frozen ResNet-50 (or similar) in ONNX. Compile and benchmark it via TensorRT on Jetson + GPU, ONNX Runtime on all three, OpenVINO on x86 CPU, and IREE on ARM if time allo…
- Ml Compilers
- Tensorrt
- Onnx Optimization
Machine Learning Systems
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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