🚀 Engineering Procedures

Engineering Excellence

Standardized procedures and best practices for BidScript development

🔀 Pull Request Process

graph TD
    A[Create Feature Branch] --> B[Develop Changes]
    B --> C[Run Local Tests]
    C --> D{Tests Pass?}
    D -->|No| E[Fix Issues]
    E --> C
    D -->|Yes| F[Open Pull Request]
    F --> G[Automated Checks]
    G --> H{CI/CD Pass?}
    H -->|No| I[Fix CI Issues]
    I --> G
    H -->|Yes| J[Peer Review]
    J --> K{Review Approved?}
    K -->|Changes Requested| L[Address Feedback]
    L --> J
    K -->|Approved| M[Merge to Main]
    M --> N[Auto-Deploy to Staging]
    N --> O[Production Release]

    style A fill:#e3f2fd
    style M fill:#42a5f5
    style O fill:#1976d2

🔀

Pull Request Workflow

1

🌱 Create Branches

Use clear naming conventions: feature/, bugfix/, hotfix/

git checkout -b feature/user-authentication

2

📝 Open Pull Request

Clearly associate with related tasks or issues using GitHub linking

3

🤖 Automated Checks

Ensure code passes automated testing, linting, and security scans

4

👥 Peer Review

Conduct thorough code reviews focusing on quality, security, and maintainability

5

🔀 Merge & Rebase

Merge approved PRs using rebase or squash to maintain history clarity

🛠️ Infrastructure Configuration

graph TB
    subgraph "Development Environment"
        DevDocker[Docker Containers]
        DevHot[Hot Reloading]
        DevDebug[Debug Config]
        DevMock[Mock Services]
    end

    subgraph "Staging Environment"
        StageProd[Production-like]
        StageAuto[Auto Deploy]
        StageTest[Integration Tests]
        StageMonitor[Monitoring]
    end

    subgraph "Production Environment"
        ProdHA[High Availability]
        ProdScale[Auto-scaling]
        ProdMonitor[Full Monitoring]
        ProdDR[Disaster Recovery]
    end

    subgraph "Azure Infrastructure"
        AzureApp[Container Apps]
        AzureDB[PostgreSQL]
        AzureRedis[Redis Cache]
        AzureStorage[Blob Storage]
        AzureMonitor[Application Insights]
    end

    DevDocker -.-> StageProd
    StageProd -.-> ProdHA

    StageAuto --> AzureApp
    ProdHA --> AzureApp
    AzureApp --> AzureDB
    AzureApp --> AzureRedis
    AzureApp --> AzureStorage
    AzureApp --> AzureMonitor

    style DevDocker fill:#e3f2fd
    style StageProd fill:#90caf9
    style ProdHA fill:#1976d2

Infrastructure as Code

Use Terraform and Azure Resource Manager templates for all infrastructure provisioning. Store configurations in version control alongside application code.

📊 Reliability & Performance Monitoring

graph TB
    subgraph "Monitoring Stack"
        AppInsights[Application Insights]
        Grafana[Grafana Dashboards]
        Alerts[Alert Manager]
        Logs[Log Analytics]
    end

    subgraph "Performance Metrics"
        ResponseTime[Response Time<br/>< 200ms]
        Uptime[Uptime<br/>99.9%]
        ErrorRate[Error Rate<br/>< 0.1%]
        Throughput[Throughput<br/>1000+ req/s]
    end

    subgraph "Alert Levels"
        Critical[Critical<br/>Response > 5s]
        Warning[Warning<br/>CPU > 80%]
        Info[Info<br/>Memory > 70%]
    end

    AppInsights --> ResponseTime
    AppInsights --> Uptime
    AppInsights --> ErrorRate
    AppInsights --> Throughput

    Alerts --> Critical
    Alerts --> Warning
    Alerts --> Info

    style Critical fill:#bbdefb
    style Warning fill:#90caf9
    style Info fill:#e3f2fd

📈 Performance Metrics

Response Time < 200ms

Uptime 99.9%

Error Rate < 0.1%

Throughput 1000+ req/s

🚨 Alerting Thresholds

• Critical Response time > 5s
• Warning CPU usage > 80%
• Info Memory usage > 70%
• Critical Error rate > 1%

📌 Data Operations

🔍 Pre-Change Validation

✓ Verify data accuracy and integrity ✓ Review data transformation logic ✓ Validate against business rules ✓ Test in staging environment

💾 Backup & Recovery

✓ Create point-in-time backup ✓ Verify backup integrity ✓ Document rollback procedures ✓ Test restoration process

🚢 Production Deployment

graph LR
    subgraph "Pre-Deployment"
        A[Code Review Approval]
        B[Automated Tests Pass]
        C[Security Scan Clean]
        D[Performance Benchmarks]
    end

    subgraph "Deployment Process"
        E[Blue-Green Deployment]
        F[Health Checks]
        G[Gradual Traffic Shift]
        H[Real-time Monitoring]
    end

    subgraph "Post-Deployment"
        I[Smoke Testing]
        J[Performance Validation]
        K[Error Rate Monitoring]
        L[User Acceptance]
    end

    A --> E
    B --> E
    C --> E
    D --> E

    E --> F
    F --> G
    G --> H

    H --> I
    I --> J
    J --> K
    K --> L

    L --> M[Deployment Complete]

    style A fill:#e3f2fd
    style E fill:#90caf9
    style I fill:#64b5f6
    style M fill:#1976d2

Rollback Strategy

Always maintain a tested rollback strategy. Database migrations should be backward compatible, and application deployments should support instant rollback.

✅ Testing Strategy

graph TB
    subgraph "Unit Tests"
        UT1[Component Logic]
        UT2[Pure Functions]
        UT3[Utility Methods]
        UT4[API Endpoints]
        UTCov[Coverage: 80%+]
    end

    subgraph "Integration Tests"
        IT1[API Contracts]
        IT2[Database Operations]
        IT3[External Services]
        IT4[Component Interactions]
        ITCov[Coverage: 60%+]
    end

    subgraph "E2E Tests"
        E2E1[User Journeys]
        E2E2[Business Workflows]
        E2E3[Critical Paths]
        E2E4[Cross-browser Testing]
        E2ECov[Coverage: Key Flows]
    end

    UT1 --> IT1
    UT2 --> IT2
    UT3 --> IT3
    UT4 --> IT4

    IT1 --> E2E1
    IT2 --> E2E2
    IT3 --> E2E3
    IT4 --> E2E4

    style UT1 fill:#e3f2fd
    style IT1 fill:#90caf9
    style E2E1 fill:#1976d2

🕵️‍♂️ Code Review Standards

🎯 Quality Criteria

• Code follows established patterns
• Functions are small and focused
• Variables have descriptive names
• Complex logic is documented
• Error handling is comprehensive

🔒 Security Checklist

• Input validation implemented
• Authentication/authorization checked
• Sensitive data properly handled
• SQL injection prevention
• XSS protection in place

⚡ Performance Review

• Database queries optimised
• Caching strategy considered
• Large datasets handled efficiently
• Resource cleanup implemented
• Memory leaks prevented

📑 Incident Response

graph TD
    A[Alert Triggered] --> B{Severity Level?}

    B -->|Critical| C[Immediate Response<br/>5 minutes]
    B -->|High| D[Quick Response<br/>15 minutes]
    B -->|Medium| E[Standard Response<br/>1 hour]
    B -->|Low| F[Next Business Day]

    C --> G[Initial Investigation]
    D --> G
    E --> G
    F --> G

    G --> H[Form Response Team]
    H --> I[Implement Fix]
    I --> J{Fix Successful?}

    J -->|No| K[Escalate & Retry]
    K --> I

    J -->|Yes| L[Monitor Stability]
    L --> M[Document Actions]
    M --> N[Post-Mortem Analysis]
    N --> O[Incident Closed]

    style C fill:#bbdefb
    style D fill:#90caf9
    style E fill:#64b5f6
    style F fill:#e8eaf6
    style O fill:#1976d2

🚨

Detection

• Automated monitoring alerts
• User-reported issues
• Health check failures
• Performance degradation

🔍

Investigation

• Gather relevant logs
• Identify affected systems
• Determine impact scope
• Form incident response team

🛠️

Resolution

• Implement immediate fix
• Monitor for stability
• Communicate status updates
• Document actions taken

📚

Post-Mortem

• Root cause analysis
• Timeline reconstruction
• Lessons learned
• Process improvements

📞 On-Call Excellence

📋 Responsibilities

• Monitor system health 24/7
• Respond to critical alerts within 15 minutes
• Escalate complex issues appropriately
• Document all incidents thoroughly
• Maintain communication with stakeholders

🚨 Response Times

Critical 5 minutes

High 15 minutes

Medium 1 hour

Low Next business day

🔄 Branch Management

gitgraph:
    options:
        showBranches: true
        showCommitLabel: true
    commit id: "Initial"
    branch staging
    branch feature/user-auth
    checkout feature/user-auth
    commit id: "Add login"
    commit id: "Add validation"
    checkout staging
    merge feature/user-auth
    commit id: "Integration test"
    checkout main
    merge staging
    commit id: "Release v1.2.0"
    branch hotfix/security-fix
    checkout hotfix/security-fix
    commit id: "Security patch"
    checkout main
    merge hotfix/security-fix
    commit id: "Hotfix v1.2.1"

graph TB
    subgraph "Branch Strategy"
        Main[main<br/>Production-ready code]
        Staging[staging<br/>Integration testing]
        Feature[feature/*<br/>Active development]
        Hotfix[hotfix/*<br/>Emergency fixes]
        Release[release/*<br/>Release preparation]
    end

    subgraph "Workflow Rules"
        Rule1[All PRs require review]
        Rule2[Tests must pass]
        Rule3[No direct commits to main]
        Rule4[Clear commit messages]
        Rule5[Semantic versioning]
    end

    Feature --> Staging
    Staging --> Main
    Hotfix --> Main
    Release --> Main

    Main --> Rule1
    Main --> Rule2
    Main --> Rule3
    Main --> Rule4
    Main --> Rule5

    style Main fill:#d4edda
    style Staging fill:#fff3cd
    style Feature fill:#e3f2fd
    style Hotfix fill:#f8d7da