Communication

How to build Zoom

Video conferencing platform with meetings, webinars, virtual backgrounds, recording, and breakout rooms.

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Features (10)

HD video conferencing

Screen sharing

Virtual backgrounds

Breakout rooms

Meeting recording (cloud/local)

Waiting room

Chat during meetings

Webinar mode

Calendar integration

End-to-end encryption

User Stories (5)

As a host, I can schedule and start video meetings

As a participant, I can join with video/audio and share my screen

As a host, I can create breakout rooms for small groups

As a host, I can record meetings to the cloud

As an admin, I can manage organization-wide settings

Suggested Tech Stack

ReactC++Node.jsPostgreSQLRedisWebRTCAWSKubernetesKafka

Non-Functional Requirements

Category	Requirement	Target
Performance	Video latency	< 150ms glass-to-glass for 1080p video
Scalability	Meeting size	Up to 1000 participants in webinar mode
Availability	Uptime SLA	99.99% — meetings are time-critical
Security	Encryption	E2E encryption option, AES-256-GCM for media
Compliance	Enterprise	HIPAA, SOC2 Type II, FedRAMP compliant

Release Milestones

MVPVideo Meetings

1:1 video callsGroup meetings (up to 100)Screen sharingChat

v1.0Enterprise

Recording (cloud)Breakout roomsWaiting roomVirtual backgroundsCalendar integration

v2.0Platform

Webinars (1000+)Zoom Phone (VoIP)Zoom Apps marketplaceAI companion (summarize)Whiteboard

Acceptance Criteria

Meeting starts within 3 seconds of clicking Join with video/audio ready

Screen share renders at 30fps minimum with < 200ms delay

Breakout rooms support automatic or manual assignment with timer

Recording is available for download within 5 minutes of meeting end

Success Metrics

Meeting join success rate: > 99.5%

Average meeting quality score: > 4/5

Enterprise retention: > 95% annual

Peak concurrent meetings: handle 300K+ simultaneously

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Non-Functional Requirements

Category	Requirement	Target
Performance	Video latency	< 150ms glass-to-glass for 1080p video
Scalability	Meeting size	Up to 1000 participants in webinar mode
Availability	Uptime SLA	99.99% — meetings are time-critical
Security	Encryption	E2E encryption option, AES-256-GCM for media
Compliance	Enterprise	HIPAA, SOC2 Type II, FedRAMP compliant