Deploy CPaaS RCS Platform on DigitalOcean -- 2

Expanded Statement of Work — RCS Public API & Connector Platform
1. Performance SLAs (Benchmark-Oriented)
The system must be architected to meet enterprise CPaaS-grade performance expectations comparable to major providers.

• API Throughput Target (Baseline):
- Sustain minimum 500–1,000 send requests/sec under normal load.
- Burst handling up to 3,000 TPS with graceful queuing (no message loss).

• Queue Processing SLA:
- Campaign enqueue latency: < 200 ms per batch.
- Worker dequeue + dispatch latency: < 1 second under steady load.

• Delivery Pipeline SLA:
- Status callback processing: < 2 seconds end‑to‑end.

• Horizontal Scaling Expectation:
- Architecture must allow stateless API scaling.
- Queue workers must scale independently.
- Database read/write contention mitigation strategy required.

• Reliability Targets:
- Zero message loss guarantee with idempotent retry logic.
- Queue durability with persistence verification.

• Monitoring Metrics:
- TPS tracking
- Queue lag
- Worker throughput
- API response time
- Failure rate alerts

2. DevOps Handover Checklist
Freelancer must provide full operational transparency and deployment readiness.

Infrastructure & Deployment:
• Production and staging environment setup
• CI/CD pipeline documentation
• Environment variable templates
• Rollback strategy documentation

Queue & Messaging:
• Dragonfly queue configuration guide
• Worker scaling instructions
• Failure recovery procedures

Database:
• Migration scripts
• Backup & restore process
• Indexing strategy documentation

Monitoring & Observability:
• Logging configuration
• Alert setup guidance
• Dashboard metrics explanation

Security:
• API authentication mechanism
• Rate limiting configuration
• Firewall and access rules summary

Documentation:
• Architecture diagram
• API usage guide
• Deployment runbook

3. Testing & Load Validation Clauses
Freelancer must demonstrate system resilience under simulated production conditions.

Functional Testing:
• API validation against all documented endpoints
• CRM connector verification
• Delivery status webhook validation

Load Testing:
• Sustained throughput test ≥ 1,000 TPS
• Burst load simulation
• Queue backlog stress scenario
• Worker failure simulation

Reliability Testing:
• Retry logic validation
• Idempotency verification
• Database failover simulation

Reporting:
• Load test results document
• Observed bottlenecks
• Optimization recommendations

4. Maintenance & Warranty
Freelancer shall provide post‑delivery support to ensure production stability.

Warranty Period:
• Minimum 30 days bug‑fix coverage after delivery

Scope of Warranty:
• Critical bug fixes
• Queue processing failures
• API reliability issues

Exclusions:
• Feature expansion
• Infrastructure cost issues
• Third‑party outages

Support Expectations:
• Response within 48 hours for critical issues
• Patch delivery timeline agreement

5. Milestone Payment Structure
Payment must be tied to verifiable deliverables.

Milestone 1 — Architecture & API Framework
• Base Jio API integration scaffold
• Queue pipeline operational

Milestone 2 — CRM Connectors
• At least two connectors functional
• Webhook pipeline validated

Milestone 3 — Load & Reliability Testing
• Performance benchmarks demonstrated
• Queue stress validation complete

Milestone 4 — Deployment & DevOps Handover
• Production deployment complete
• Documentation delivered

Milestone 5 — Acceptance & Warranty Activation
• Final validation
• Warranty period begins