Audit-grade documentation
If you like applying Audit-grade documentation, every challenge here gives you a chance to practice it on a real industry brief.
- DesignSeniorNew
Re-Architect a Data-Center Fabric for an AI-Training Workload
Receive the current 3-tier topology diagram, traffic captures from the existing fabric (4 weeks of sFlow), and the rack-level requirements for the 4 new H100 racks (200 Gbps per…
- Data Center Networking
- Bgp
- Evpn Vxlan
Advanced Computer Networks - CodeIntermediateNew
Build an Indexer for an On-Chain DeFi Analytics Product
Receive the 6 protocols' ABIs + the team's required event coverage spec (around 40 event types). Build a TypeScript indexer using viem + Postgres: subscribe to new blocks via We…
- Blockchain Indexing
- Typescript
- Ethereum
Blockchain and Decentralized Systems Engineering - DesignBeginnerNew
Architecture Decision Records for a Modernization Program
Read 18 weeks of architecture-channel Slack history and 6 architecture-review meeting notes to inventory decisions already made. Backfill 12 ADRs using Michael Nygard's template…
- Architecture Decision Records (Adrs)
- Technical Debt
- Stakeholder Communication
Technical Debt Management - 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 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
Design Multi-Tenant Network Policies with Calico Tier Enforcement
Receive the cluster topology (120 customer namespaces + 4 platform namespaces), the application traffic patterns (frontend talks to backend talks to its tenant's database), and …
- Kubernetes Orchestration
- Network Policy
- Calico
Container Orchestration with Kubernetes - AnalysisBeginnerNew
Requirements Elicitation for a Sustainable Fashion Platform
Conduct stakeholder interviews (simulated via provided personas) and create a requirements specification. Include functional and non-functional requirements, user stories, accep…
- Requirements Elicitation
- User Stories
- Acceptance Criteria
Software Engineering and Quality Assurance - AnalysisIntermediateNew
Cost-Profile a Spark Job at Scale and Cut the Bill in Half
Receive the PySpark job (around 1,800 lines), 5 nights of Spark UI + EMR metrics, and the EMR cluster config. Profile to find the top 3 cost drivers (likely candidates: skewed j…
- Apache Spark
- Finops & Cost Optimization
- Etl Pipelines
Big Data and Data-Intensive Systems - DesignSeniorNew
Design a Cross-Chain Bridge Protocol with Honest Threat Model
Read the Vitalik 'cross-chain interoperability' essay and survey 3 existing bridge designs (lock-and-mint, atomic-swap, optimistic-rollup-native). Design your protocol around a …
- Blockchain Protocols
- Smart Contracts
- Solidity
Blockchain and Decentralized Systems Engineering - 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.
- CodeBeginnerNew
Implement a User-Space Shell with Process and Signal Handling
Implement a shell in C (no shell helpers, just POSIX system calls). Required features: read a line, parse it into commands + arguments, handle pipelines with arbitrary chain len…
- System Calls
- Process Management
- Signal Handling
Computer Systems and Organization
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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