Information Technology Challenges
Explore information technology challenges on Ewance to develop skills companies are actively hiring for. Work on briefs covering cloud, infrastructure, security, and platform engineering.
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- AnalysisIntermediateNew
Privacy Posture Review of a Fintech's Internal Service Mesh
Work only from the four supplied materials: the anonymized service inventory, the sample east-west traffic flow records, the current mesh policy export, and the public Istio sec…
- Network Privacy
- Mtls
- Service Mesh
Open coursework - CodeBeginnerNew
Refactor a Tangled Java Pricing Engine With Design Patterns
Start from a provided Java 21 codebase with the legacy PricingEngine class, 38 example fixtures (input cart, expected price), and one failing test demonstrating a bug from last …
- Java
- Design Patterns
- Refactoring
Open coursework - CodeBeginnerNew
Design and Implement a C++ Telemetry Aggregator With Inheritance
Implement a TelemetrySource abstract base class with virtual sample() and timestamp() methods, 6 concrete subclasses (one per sensor family), and a TelemetryBus that polymorphic…
- Cpp
- Inheritance
- Polymorphism
Object-Oriented Programming and Design - CodeBeginnerNew
Design a Domain Model for a Library Loan System (Java)
Implement, in Java 21, an Item type hierarchy (Book, AudioBook, Periodical, EquipmentLoan — each with sub-type-specific rules), Member with eligibility logic, Loan as an aggrega…
- Java
- Oo Design
- Domain Modeling
Object-Oriented Programming and Design Develop in-demand professional skills.
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- CodeBeginnerNew
Apply SOLID to a Java Reporting Service for a Renewable Energy Startup
Receive the legacy ReportService, 4 sample report templates (Daily Output, Monthly P&L, Annual Availability, Curtailment), and 22 fixtures (input dataset, expected report). Refa…
- Java
- Solid Principles
- Refactoring
Object-Oriented Programming and Design - 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 - CodeIntermediateNew
Roll Out OpenTelemetry Tracing Across a Microservices Fintech
Receive an anonymized service map (90 services, payment-critical path of 12), a runtime mix (Node.js, Go, Java), and existing logging/metrics setup. Define: an OTel SDK adoption…
- Distributed Tracing
- Opentelemetry
- Sampling Strategies
Software Observability - DesignIntermediateNew
Design SLO-Driven Alerts for a Telco's Subscriber API
Receive a 90-day RED (Rate, Errors, Duration) metrics export for the subscriber API across 6 endpoints and 38 weeks of paging history. Define an SLO per endpoint (e.g., 99.9 per…
- Slo Design
- Alerting
- Prometheus
Software Observability - Browse challenges
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Pricing Strategist
Set the price that captures value without leaving sales on the table. Demand modelling, willingness-to-pay research, and the disciplined experimentation that turns pricing into a competitive advantage.
- AnalysisIntermediateNew
Diagnose Route-Optimize Latency Tail Using Distributed Traces
Working only from the four supplied materials — the slow-trace export, the service map, the customer complaint log, and the infrastructure health readings — examine why the slow…
- Distributed Tracing
- Performance Analysis
- Tempo
Open coursework - AnalysisBeginnerNew
Flatten the Datadog Bill for a Stockholm Gaming Studio
Working only from the materials provided, audit Stagelight Games' observability spend and produce a defensible plan to flatten it. Use the metric inventory export to rank the to…
- Cardinality Control
- Datadog
- Cost Optimization
Open coursework - DesignBeginnerNew
Design Structured JSON Logging for a Healthcare Rails Monolith
Working only from the three materials provided, design and propose a structured-logging migration for the Rails monolith. Study the current logger configuration (provided code m…
- Structured Logging
- Loki
- Phi Redaction
Open coursework - AnalysisIntermediateNew
Open-Source License Audit and 60-Day Remediation Plan for Lumen Observability
Work only from the four items in provided_materials. Start with the dependency inventory (the 'Lumen dependency inventory' dataset), which lists every open-source package, its d…
- Oss Licensing
- Sbom
- Supply Chain
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- DesignIntermediateNew
Design an Upstream Contribution to a CNCF Service-Mesh Project
Using the internal fork dossier (case-file) for the business context, the prior rejection feedback, and the targeted roadmap area, design an upstream contribution that a careful…
- Oss Contribution
- Rfc Design
- Pr Etiquette
Open coursework - DesignBeginnerNew
Design a Sustainable Governance Model for a Burnt-Out Open-Source Project
Working only from the provided materials — the Project Health Snapshot (m1), the issue-and-contribution activity log (m2), the anonymized community chat excerpts (m3), and the f…
- Governance Models
- Maintainership
- Issue Triage
Open coursework - DesignIntermediateNew
Design a SLSA-Aligned, Signed Release Pipeline for an Apache Project
Working only from the materials provided—the project dossier, the current release-pipeline module, the SLSA v1.0 specification, the slsa-github-generator project, the Sigstore d…
- Supply Chain
- Slsa
- Sigstore
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 Multi-Level Feedback Queue Scheduler in xv6
Fork the xv6-riscv repository and implement MLFQ in proc.c with 3 priority queues, per-queue time slices (10ms / 20ms / 40ms), priority demotion on slice exhaustion, and a 100ms…
- Operating Systems
- Scheduling
- C Programming
Operating Systems - 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 - AnalysisIntermediateNew
Design a Custom Page-Replacement Policy for a Tier-1 Cloud Provider Simulator
Use the provided simulator (Python harness wrapping a C++ page-cache model) and the team's 3 anonymized workload traces (web-cache, key-value store, batch analytics). Implement …
- Memory Management
- Page Replacement
- Benchmarking
Operating Systems - CodeIntermediateNew
Build a User-Space File System with FUSE for a Storage Startup
Build a FUSE driver (your choice of Rust + fuser crate or Go + bazil/fuse) that proxies POSIX operations to the startup's existing S3-compatible REST API (mock provided). Suppor…
- File Systems
- Fuse
- Rust Programming
Operating Systems - AnalysisBeginnerNew
Audit a Linux Distribution for Setuid Binary Risk
Mount the provided base image (Ubuntu 22.04 LTS derivative) and inventory all setuid + setgid binaries. For each, classify into 4 buckets: legitimately needed, replaceable with …
- Os Security
- Linux Administration
- Setuid Analysis
Open coursework - CodeSeniorNew
Port a Microkernel's Fast Message Path from x86-64 to RISC-V
Starting from the representative fast-path module and its behavioral specification in the provided materials, re-implement the synchronous fast message path for RISC-V 64-bit (t…
- Microkernels
- Ipc
- Risc V
Open coursework - CodeSeniorNew
Build a Unikernel for a Privacy-Focused VPN Provider
Choose either MirageOS or Unikraft as the unikernel framework. Build an image running a minimal WireGuard data plane (existing OCaml or Rust WireGuard reference implementation i…
- Unikernels
- Virtualization
- Wireguard
Advanced Operating Systems - DesignSeniorNew
Design OS-Level Cache Side-Channel Mitigations for a Multi-Tenant Cloud
Using the de-identified disclosure record (the case file) and the three published attack papers provided in the materials, characterize each of the three attacks — Flush+Reload,…
- Os Security
- Side Channels
- Virtualization
Open coursework
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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
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