Real-World Challenges Aligned to Your Coursework
Real scenarios from business, engineering, design, and analysis. Practice the work your degree prepares you for, earn verified credentials, build a portfolio recruiters can verify.
- CodeBeginnerNew
Image-Classification Model for a Quality-Control Line at a Bottling Plant
Train an image classifier on 8,000 labeled bottle images (3 defect classes + 'ok'). Use transfer learning from a pre-trained backbone (EfficientNet-B0 or MobileNetV3) — the line…
- Deep Learning
- Supervised Learning
- Ml Applications
Machine Learning (CS Elective) - ResearchSeniorNew
Business Cycle Positioning for a Renewable Energy Firm
You are an economic analyst at SunVista. The CFO needs a report on the current and expected Eurozone business cycle to guide the timing of a €500M investment in new solar capaci…
- Business Cycle Analysis
- Macroeconomic Forecasting
- Investment Timing
Global Economy and Macroeconomics for Managers - 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 - DesignIntermediateNew
Design a Geo-Distributed Storage Layer for an EdTech
Map the access patterns (90 percent reads from the country of origin, 10 percent cross-country via teacher reviewers). Design region routing using a metadata service backed by a…
- Geo Distribution
- Data Residency
- Cockroachdb
Distributed Systems 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
- DesignIntermediateNew
IT Architecture Overhaul for a 40-Person SaaS Scale-Up
Design a microservices-based architecture with multi-tenancy, API gateway, and compliance features. Propose a migration strategy (strangler fig pattern) over 12 months. Deliver …
- Microservices Patterns
- Multi Tenancy Architecture
- Multi Cloud Architecture
Information Systems and IT Management - StrategyBeginnerNew
Pick a Forecasting Stack for an Edtech Engagement Team
You will produce a 6-page strategy memo evaluating three paths: (1) in-house forecasting team (2 engineers), (2) open-source stack (statsforecast + neuralforecast), (3) forecast…
- Ai Workforce Strategy
- Build Vs Buy Analysis
- Vendor Evaluation
Time Series Analysis and Forecasting - DesignBeginnerNew
Design a Golden-Path Service Template for a Series-D Scale-Up
Design a golden-path template producing a Go (or Node) microservice with: REST + gRPC scaffolding, structured logging (slog or pino), OpenTelemetry tracing, Prometheus metrics, …
- Platform Engineering
- Golden Paths
- Backstage
Platform Engineering - AnalysisBeginnerNew
Demand Forecasting for a New York D2C Cosmetics Brand
You are a forecasting analyst at Glow NYC. Using provided monthly sales data (units sold) for 10 SKUs, develop a time series forecast for the next 3 months. Compare at least two…
- Time Series Analysis
- Forecasting
- Data Visualization
Forecasting for Decision Making - Browse challenges
Explore role
Marketing Analyst
Plan and measure campaigns that grow the business. Funnel analytics, attribution, segmentation, and the rigorous measurement that lets marketing defend its budget at the leadership table.
- CodeSeniorNew
PPO Alignment Loop with a Pretrained Reward Model
You receive a small open-weights base model (around 7B), a previously trained reward model, and 5,000 prompts (no responses) for PPO rollouts. Run PPO with TRL's PPOTrainer for …
- Rlhf
- Ppo
- Reward Hacking
Machine Learning from Human Preferences (RLHF and Alignment) - CodeIntermediateNew
Build a BM25 + Embeddings Hybrid Search for a Legal-Tech Document Portal
Stand up an OpenSearch cluster with BM25 indexing on the 2.4M-document corpus. Generate dense embeddings (you choose the model; justify cost and quality trade-offs) and index th…
- Information Retrieval
- Bm25
- Vector Database Basics
Data Mining and Information Retrieval - StrategyIntermediateNew
IP Strategy for a SaaS Scale-Up Moving to Enterprise
Your task is to create a comprehensive IP strategy report for TaskFlow. This should include an audit of existing IP, recommendations for patenting key algorithms (if feasible), …
- Intellectual Property
- Patent Strategy
- Trade Secrets
IT Law and Data Protection - ResearchSeniorNew
Design a Distributed-Training Strategy for a Mid-Sized LLM
You will write a 5-page design memo that picks a parallelism strategy for fine-tuning a 13B model on 32 H100 GPUs, with a tokens-per-second estimate, a memory-per-GPU calculatio…
- Distributed Training
- Parallelism Strategies
- LLM Training
Machine Learning at Scale 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
- CodeSeniorNew
Architecture Patterns Spike for a Real-Time Multiplayer Backend
Implement minimal viable versions of all three patterns in Rust + Go (your pick of split): (1) authoritative server with 20 Hz snapshots and client-side prediction, (2) lockstep…
- Realtime Systems
- Architecture Spike
- Networking Patterns
Software Architecture - DesignBeginnerNew
Redesigning Sales Incentives for a B2B SaaS Scale-up
Your task is to propose a new incentive plan for the sales team that balances new business acquisition, account expansion, and retention. The plan must be cost-neutral (total co…
- Incentive Design
- Compensation Analysis
- Sales Strategy
Motivation and Incentives - CodeIntermediateNew
Agentic RAG with Context-Window Budgeting
You receive a synthetic dataset of 60 founder-style queries paired with 'workspaces' (each up to 500 documents across 3 source types), plus gold-standard answers and citation li…
- Agentic RAG
- Context Window Management
- Iterative Retrieval
Retrieval-Augmented Generation - DesignIntermediateNew
Author a Scrollytelling Narrative on a Programmatic-Advertising Anomaly
Read the analytics team's internal report on the 3-week anomaly. Design a 7-section scrollytelling narrative using Segel-and-Heer's genre taxonomy (e.g. interactive slideshow + …
- Narrative Visualization
- Scrollytelling
- Svelte
Information and Data Visualization - DesignSeniorNew
Digital Innovation Lab for a Regional Bank
Your task is to design a blueprint for the innovation lab. Define its structure (e.g., hub-and-spoke, virtual team), governance (e.g., stage-gate process), and funding model. Pr…
- Innovation Lab Design
- Regulatory Compliance
- Legacy System Integration
Digital Transformation - DesignFoundationalNew
Stakeholder Workshop on AI Risk for a Public-Sector Pilot
You receive a description of the pilot (24/7 LLM chatbot answering questions on municipal services in Spanish and Catalan). Design a 3-hour workshop for around 25 mixed-stakehol…
- Stakeholder Management
- Workshop Design
- Responsible Ai
AI Ethics, Fairness, and Responsible AI - StrategyIntermediateNew
Roll Out an Advanced Process Model (LeSS) to 6 Product Teams
Read the LeSS framework (Larman + Vodde) and audit the 6 teams' current Scrum practice (anonymized data + 4 hours of recorded ceremonies). Author a 10-page rollout design coveri…
- Advanced Process Models
- Scaling Agile
- Less
Advanced Software Engineering - AnalysisIntermediateNew
Capacity Planning for a SaaS Scale-Up's Customer Support
Your task is to forecast ticket volumes based on enterprise growth projections, analyze current support capacity and performance, and propose a staffing plan that meets SLAs. Su…
- Capacity Planning
- Queuing Theory
- Ai Workforce Management
Operations Management - CodeIntermediateNew
Build a Small Transformer from Scratch and Train It on Code
Implement multi-head self-attention, RMSNorm, rotary positional embeddings, and a causal LM head from scratch — no Hugging Face shortcuts for the model code (you may use Hugging…
- Hugging Face Transformers
- Self Attention
- Pytorch Or Tensorflow
Neural Networks for NLP - StrategyBeginnerNew
Migrate a Local-Government Records System from MySQL to PostgreSQL
Audit the MySQL schema (around 60 tables) for incompatibilities (case-folding identifiers, ENUM types, TIMESTAMP semantics, character sets). Plan a migration using pgloader for …
- Database Migration
- Postgresql Or Mysql
- Postgresql Or Mysql
Introduction to Database Systems - DesignBeginnerNew
Motivating a Remote Sales Team in a SaaS Scale-Up
Your task is to create a motivation plan for the remote sales team. Success means proposing a system that increases intrinsic motivation, clarifies goals, and fosters a sense of…
- Motivation Theory
- Remote Team Management
- Goal Setting
Organizational Behavior (Graduate) - ResearchIntermediateNew
Visual Question Answering for a Pediatric Radiology Workflow
You receive ~8,000 publicly available pediatric chest X-rays with structured findings labels (anonymized; no PHI access required). Build a VQA pipeline that maps a (image, quest…
- Vision Language Models
- Visual Question Answering
- Lora Finetuning
Visual Intelligence and Visual Reasoning
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