Computer Science
Site Reliability & Observability Challenges
Site Reliability & Observability challenges put you on the hook for keeping production healthy. You'll build the fundamentals — Application Monitoring, Dashboard Reading, and Performance Analysis — and instrument services with OpenTelemetry instrumentation, Prometheus & Grafana, then define what "healthy" means through Service Level Objectives and SLO / SLI definition.
From there you'll handle the harder edges — Incident command, On-call runbooks, Multi-region failover, and Chaos engineering — the way reliability teams actually operate under pressure. Each challenge you solve earns a verified credential you can share with recruiters.
- 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 - AnalysisSeniorNew
Diagnose Clock Skew in a HFT Order Matching System
Receive anonymized PTP grandmaster + slave logs (nanosecond resolution, 30 days, 3 cabinets) plus a synthetic order-flow generator. Identify the drift pattern (likely candidate:…
- Logical Clocks
- Ptp Time Sync
- Cpp Programming
Distributed Systems - AnalysisIntermediateNew
Tune OpenMP Performance on a Memory-Bound Genomics Pipeline
Profile the existing pipeline at 1, 4, 8, 16, 32, 48, 64 threads using Intel VTune + Linux perf. Identify the bottlenecks (likely candidates: NUMA-unaware memory allocation, fal…
- Openmp
- Numa Awareness
- False Sharing
High-Performance and Scientific Computing - CodeBeginnerNew
Observability Injection: Distributed Tracing via Sidecars
Enable Envoy tracing with the OpenTelemetry tracer in Istio MeshConfig. Configure a Tempo backend with a Grafana frontend. Verify W3C tracecontext propagation across all 26 serv…
- Distributed Tracing
- Opentelemetry
- Envoy
Service Mesh and Microservices Networking 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
- 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 
DesignBeginnerNewDesign a Canary Deployment Strategy for Corso Nove Checkout
Using the incident postmortem (incident-postmortem), the platform architecture spec (platform-architecture-spec), the per-service reliability targets (slo-targets-brief), and th…
- Flagger
- Argo Rollouts
- Canary Deployment
Open coursework- CodeIntermediateNew
Instrument Network Telemetry for an ISP's Backbone
Receive the backbone topology (12 routers across 4 PoPs, mix of Cisco IOS XR + Juniper Junos), the current SNMP-based monitoring stack, and 4 weeks of customer-complaint tickets…
- Network Telemetry
- Gnmi
- Kafka
Advanced Computer Networks - DesignIntermediateNew
Instrument a Model Monitoring Stack from Scratch
Pick the priority product (recommend the customer-service RAG assistant, around 40k queries/day). Define monitoring signals: input drift (Evidently/NannyML), output quality (LLM…
- Model Monitoring
- Data Drift Detection
- LLM Evaluation
ML Engineering and Production ML - Browse challenges
Explore role
Product Manager
Ship product that solves real user problems. Combine user research, prototyping, and stakeholder alignment to turn ambiguous briefs into measurable wins — the role at the centre of modern software teams.
- DesignIntermediateNew
Design a Zero-Downtime Multi-Region PostgreSQL Migration for an EdTech Platform
Using the infrastructure inventory (infra-inventory), the database schema sample (schema-subset), the workload metrics (workload-metrics), and the service-level brief (sla-brief…
- Blue Green Deployment
- Logical Replication
- Postgresql
Open coursework - DesignSeniorNew
Multi-Region Failover for an Enterprise RAG Service
Design and prototype: (1) a primary-region deployment of the RAG service (vector DB + LLM inference + retrieval API), (2) a passive secondary region with replicated vector store…
- Multi Region Architecture
- Disaster Recovery
- Infrastructure As Code
Cloud Computing for Data and ML - DesignIntermediateNew
Observability for a Microservices Payments Platform
Design the observability architecture: OpenTelemetry traces from 38 services into Tempo, structured logs via Loki, RED (rate, errors, duration) metrics via Prometheus, SLOs defi…
- Observability
- Opentelemetry
- Slo Design
DevOps and Secure Deployment - PresentationBeginnerNew
Run an Incident-Response Tabletop for a Healthtech On-Call Team
Design 3 tabletop scenarios with realistic timeline injects (every 5-10 minutes, new info arrives). Run the tabletop hybrid (in-person + remote) with the 8 on-call engineers + 2…
- Incident Response
- Tabletop Exercises
- Incident Command System
Site Reliability Engineering 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
- 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 - AnalysisIntermediateNew
Tune Database Consistency for a Ride-Hailing Match Engine
Working only from the materials provided, analyse why the matching glitch appears under load and argue for a consistency policy per query class. Start from the cluster topology …
- Consistency Models
- Cassandra
- Distributed Tracing
Open coursework - DesignIntermediateNew
Design Parallel I/O for a Climate-Simulation Data Pipeline
Analyze the current I/O pattern: each MPI rank writes its own file via serial HDF5 (the classic anti-pattern). Design a single shared file using parallel HDF5 + MPI-IO with coll…
- Mpi Io
- Parallel Hdf5
- Lustre Filesystem
High-Performance and Scientific Computing - 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 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
- Ab Testing
ML Engineering and Production ML - AnalysisBeginnerNew
Define SLOs and Error Budgets for a Real-Time Trading API
Pull 90 days of API latency + error data per endpoint from Prometheus (anonymized exports provided). Propose Service Level Indicators (SLIs) for 3 services × 2 SLI types (availa…
- Slo Definition
- Error Budgets
- Sli Design
Site Reliability Engineering
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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