API v2 Migration with Deprecation

For Executives (60 second read)

Status: ✅ Complete

Business Impact:

• 200ms latency improvement: Faster user experience drives engagement and retention
• 99.9% uptime achieved: Enterprise SLA compliance unlocked, reducing churn risk
• System modernized: Scalable foundation for future product expansion

What Changed:
API infrastructure upgraded to v2. Legacy endpoints phased out on schedule.

Customer Impact:
Zero downtime migration. Users experience faster performance immediately.

Next Steps:
Engineering monitoring performance metrics. No action required from leadership.

For Engineering (5 minute read)

API v2 Migration: Complete

Technical Summary:
Successfully migrated from v1 to v2 API architecture. All production traffic now running on v2 infrastructure.

Performance Improvements:

• Latency: Reduced median response time by 200ms (from ~450ms to ~250ms)
• Uptime: Achieved 99.9% availability throughout migration period
• Throughput: Maintained during cutover with zero dropped requests

Implementation Details:

• Deployed v2 endpoints alongside v1 (dual-stack)
• Gradual traffic migration using feature flags
• Deprecated legacy v1 endpoints (sunset timeline: 30 days)

Monitoring & Rollback:

• Active monitoring on Datadog dashboards (API v2 Performance, Error Rates)
• Rollback plan validated and tested
• No rollback needed - all metrics green

Deprecated Endpoints:
Legacy v1 endpoints will return 410 Gone after 30-day sunset period. Client libraries updated. Documentation reflects v2 as canonical.

Next Sprint Considerations:

• Remove v1 compatibility layer (scheduled for Sprint 24)
• Optimize caching layer for additional latency gains
• Expand v2 coverage to remaining internal services

Runbook: [Link to API v2 Migration Runbook]

For Sales (2 minute read)

What Your Customers Get:
Our platform just got significantly faster and more reliable.

Key Benefits:

• 2x faster response times: 200ms improvement means snappier user experience
• 99.9% uptime: Enterprise-grade reliability unlocked for all customers
• Modern infrastructure: We’re positioned for rapid feature development

Talking Points:
✅ “We’ve upgraded our API infrastructure for industry-leading performance”
✅ “200ms faster means your team saves time on every action”
✅ “99.9% uptime backs our enterprise SLA commitments”

Competitive Advantage:
Most competitors still running legacy API architectures. We’re now measurably faster and more scalable.

Customer Availability:
Live now. All customers automatically benefiting from improvements.

Demo Tips:
Emphasize speed when demonstrating workflows. Compare before/after if you have metrics from previous demos.

Objection Handling:

• “How does this affect our integration?” → Zero impact. Fully backward compatible during transition period.
• “Is there downtime?” → No. Zero-downtime migration completed.

For Support (3 minute read)

What Changed for Customers:
Backend API upgraded to v2. Customers will notice faster performance across the platform.

Customer-Facing Impact:

• Faster loading: Pages and actions respond ~200ms quicker
• More reliable: 99.9% uptime means fewer disruptions
• No action needed: Automatic upgrade, zero customer effort

Common Questions & Answers:

Q: “Why is the app faster today?”
A: We upgraded our backend infrastructure for better performance. You’re now experiencing 200ms faster response times across all features.

Q: “Do I need to update anything?”
A: No action needed. The improvements are automatic and backend-only.

Q: “Are my integrations still working?”
A: Yes. All integrations remain fully compatible. We maintained backward compatibility during the migration.

Q: “I’m seeing errors with [legacy feature]”
A: Some older API endpoints have been deprecated. Please share the specific error message and we’ll provide the updated endpoint or workaround.

Known Issues:

• Legacy v1 endpoints: Will show deprecation warnings for 30 days, then return 410 Gone errors
• Workaround: Customers using legacy endpoints should migrate to v2 (documentation provided)

Escalation Path:
If customers report performance degradation or errors mentioning “v2” → escalate to Engineering immediately via #eng-api-v2 Slack channel.

Documentation:

• [API v2 Migration Guide for Customers]
• [v1 to v2 Endpoint Mapping]
• [Troubleshooting Common Migration Issues]

Troubleshooting Tips:

1. Check if customer is using legacy v1 endpoint (look for “/v1/” in error logs)
2. Direct them to v2 equivalent endpoint in migration guide
3. Verify their API client library is up-to-date (v2 support required)