Engineering & Technology
Software Engineering Challenges
Real software-engineering projects on Ewance — design, build, and ship features against production-shaped constraints, not toy exercises. Solve them to build a portfolio of verified, recruiter-checkable proof you can do the work — not just describe it.
Recommended challenges
- 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 - DesignBeginnerNew
Organize a Distributed Team Across 4 Timezones
Audit the current state via 8 interviews (4 in SF, 2 in Warsaw, 2 in Bangalore). Design 4-5 squads each owning a domain end-to-end (not split across timezones for handoff). Buil…
- Team Management
- Distributed Teams
- Communication Design
Software Project Management - DesignIntermediateNew
Design an Idiomatic REST + Webhooks API for a Logistics SaaS
Read the team's draft + the public APIs of 3 reference logistics platforms (anonymized, briefing pack provided). Author a 5-page API design guideline covering URL structure (nou…
- API Design
- REST
- Openapi
Software Design and Design Patterns - DesignSeniorNew
Migrate a 600K-LOC Monolith to a Modular Monolith
Run static dependency analysis on the monolith (using Packwerk + custom Ruby AST scripts, both available) to surface the current implicit modules and the worst cross-module depe…
- Large Scale Codebases
- Modular Monolith
- Static Analysis
Advanced Software Engineering 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
- StrategyIntermediateNew
Risk Register and Budget for a Regulated Mobile Banking Launch
Read the launch brief (28 pages) and the regulatory inventory (12 obligations). Build a top-25 risk register categorized (technical, security, regulatory, vendor, operational) w…
- Risk Management
- Regulatory Planning
- Scheduling
Software Project Management - CodeIntermediateNew
Build an Event-Sourced Inventory System for a Warehouse
Design the event model: 12-15 events covering the warehouse lifecycle. Implement using EventStoreDB (or Kafka + a snapshotting projection layer) in Go or C#. Build at least 3 re…
- Event Sourcing
- Cqrs
- Eventstoredb
Event-Driven Architecture - DesignIntermediateNew
Design an Event-Driven Reporting Pipeline for an Enterprise BI Team
Map the 9 source systems by extraction approach: CDC where possible (Debezium for SAP HANA + MES databases), event hooks where the source supports them (Salesforce streaming API…
- Change Data Capture
- Kafka
- Debezium
Enterprise and Business Software Engineering - StrategyBeginnerNew
Code Review Bootcamp for an Early-Stage Mobile Team
Read the team's last 100 merged PRs (export provided) and tag the 10 worst review threads (rubber-stamp, bikeshed, missing context). Draft a 4-page code-review guideline coverin…
- Code Review
- Team Coaching
- Process Design
Software Construction - 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.
- DesignIntermediateNew
Design Schema Evolution for a Multi-Tenant Event Platform
Design a schema-evolution model covering: schema-registry topology (per-tenant subjects vs shared), compatibility modes per topic class (strict vs forward-only vs none), tenant-…
- Schema Evolution
- Kafka
- Schema Registry
Event-Driven Architecture - StrategyBeginnerNew
Strategy Brief on Layer-2 Choice for a Web3 Gaming Studio
Survey the three L2 categories with 2026-current numbers: per-transaction cost at expected game throughput (around 50 TPS sustained, 500 TPS event spikes), finality latency (mat…
- Layer 2 Protocols
- Blockchain Protocols
- Research
Blockchain and Decentralized Systems Engineering - 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 - AnalysisBeginnerNew
Rescue a Stalling Scrum Team at a Series-B HealthTech
Review 8 hours of recorded ceremonies and 3 sprints of Jira data (story sizing, carry-over rate, cycle time per story, blocker tags). Diagnose the top 3 root causes (likely cand…
- Scrum
- Agile Metrics
- Retrospectives
Agile Methods and Practices Get recognized by recruiters and employers.
Credentials are blockchain-anchored via LearnCoin — tamper-evident, portable, link-shareable on LinkedIn and beyond.
Why Ewance
- CodeBeginnerNew
Add a Test Harness to an Untested Open-Source CLI
Fork the repo (test mirror provided), set up Vitest with coverage and a CI workflow that fails under 75 percent on the targeted modules. Write characterization tests first (asse…
- Unit Testing
- Integration Testing
- Test Coverage
Software Construction - PresentationBeginnerNew
Requirements Validation Workshop for a Government Permits Portal
Convert the 12 main flows in the requirements document into concrete executable scenarios (think Gherkin: Given / When / Then) with realistic data (anonymized real permits). Wal…
- Requirements Validation
- Executable Scenarios
- Gherkin
Requirements Engineering - CodeIntermediateNew
Supply-Chain Hardening: SLSA-Aligned Build Pipeline for an Apache Project
Audit the project's current release pipeline (GitHub Actions, release-script). Map the current state against the SLSA v1.0 requirements (source, build, provenance, dependencies)…
- Supply Chain
- Slsa
- Sigstore
Open Source Contribution and Maintainership - CodeIntermediateNew
Repository + Unit-of-Work Refactor on an EF Core Codebase
Read the data-access patterns across the 5 bounded contexts (Payroll, Timesheets, Benefits, Org, Reporting) and tag the 12 worst N+1 incidents from the last quarter's traces. Au…
- Repository Pattern
- Unit Of Work
- Design Patterns
Software Design and Design Patterns - 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 - ResearchBeginnerNew
Stakeholder Interviews for a Hospital EHR Replacement
Run 38 structured interviews (45 min each) using a question protocol covering daily workflows, top-3 pain points, and red-line constraints (e.g., 'must not add clicks per chart'…
- Stakeholder Analysis
- Requirements Elicitation
- User Interviews
Requirements Engineering - DesignIntermediateNew
Migrate a RabbitMQ Topology to Kafka for a Healthcare SaaS
Analyze the current RabbitMQ topology + 30 days of message volume data. Map each queue to a Kafka topic with the right partition key (likely patient_id, encounter_id, or clinic_…
- Kafka
- Rabbitmq
- Message Broker Migration
Event-Driven Architecture - CodeIntermediateNew
Refactor a Big-Ball-of-Mud Java Servlet Application
Week 1: install JUnit 5 + Testcontainers harness, write characterization tests for the 2 target workflows (PolicyIssue + ClaimSubmit) reaching at least 80 percent branch coverag…
- Refactoring
- Characterization Testing
- Legacy Systems
Software Evolution and Maintenance - PresentationIntermediateNew
Run a Cross-Team Retrospective After a Failed Launch
Design a 3-hour structured retrospective using either Liberating Structures or Norm Kerr's 'Prime Directive' framing (assume people did the best job possible with what they knew…
- Retrospectives
- Facilitation
- Incident Analysis
Agile Methods and Practices - CodeSeniorNew
Implement a Proof-of-Stake Consensus Mechanism in Rust
Read the Casper FFG paper (Buterin + Griffith, 2017) and design a simplified PoS implementation in Rust: 21 validators, 32-slot epochs, two-phase finality (justify, then finaliz…
- Consensus Algorithms
- Blockchain Protocols
- Rust
Blockchain and Decentralized Systems Engineering - CodeIntermediateNew
Apply Hexagonal Architecture to a Payments Microservice
Design the settlement domain in pure Kotlin (no Spring imports, no framework annotations). Define ports for: payment-network adapter (one inbound per network — SEPA, Faster Paym…
- Hexagonal Architecture
- Ports And Adapters
- Kotlin Programming
Domain-Driven Design - CodeIntermediateNew
Debug a Race Condition in a Real-Time Collaboration Service
Build a deterministic load-test harness (k6 or Playwright) that reproduces the corruption within 3 attempts on a clean local stack. Capture traces with OpenTelemetry to localize…
- Debugging
- Concurrency
- Load Testing
Software Construction
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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
Earn a verified credential.
Step 06
Add it to LinkedIn with one click.
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