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Case Study

Payday Chat

A real-time, members-only network for online business founders.

The Problem

Founders needed a private, high-signal place to network, build teams, and scale revenue — not another noisy public feed. Payday Chat is invite-only and built around real-time collaboration.

My Role

Built solo with AI-assisted development — Flutter client, NestJS API, data model, real-time layer, and deployment.

Highlights

  • Real-time messaging with presence and live events over WebSockets
  • One NestJS API powering both a Flutter mobile app and a web client
  • PostgreSQL domain model with Redis for caching and pub/sub fan-out
  • NGINX gateway, Stripe payments, and OAuth authentication

Stack

FlutterDartNestJSPostgreSQLRedisNGINXStripe

Constraints

  • Invite-only product — auth and access control had to be correct from day one.
  • One backend, two clients (Flutter + web) — schema and contracts had to be shared, not duplicated.
  • Realtime is a feature, not a nice-to-have — presence and live events must survive reconnects.

System Architecture

Clients
Flutter Mobile App
Web App
Gateway
NGINX
API
NestJS REST
WebSocket Gateway
Data
PostgreSQL
Redis (cache + pub/sub)
External
Stripe
OAuth

Key Trade-offs

The decisions worth defending — what I chose, what I turned down, and why.

Realtime transport

Chose

WebSockets with Redis pub/sub fan-out

Rejected

Long-polling or third-party realtime SaaS

Predictable latency, no per-message vendor cost, and Redis already in the stack for caching — one fewer moving part.

Mobile client framework

Chose

Flutter (single codebase for iOS + Android)

Rejected

Native Swift + Kotlin clients

Solo build — two native clients would have doubled the surface area and slowed iteration on the API.

API style

Chose

REST + dedicated WebSocket gateway

Rejected

GraphQL subscriptions

Simpler operational story, easier to cache at the NGINX layer, and the realtime channel stays an explicit, observable component.

What I'd Do Differently

An honest retrospective — the stuff I'd change with more time, more users, or a second pass.

  1. 1Introduce contract tests between the NestJS API and the Flutter client earlier — a few breakages were caught only at runtime.
  2. 2Move long-lived sockets to a dedicated process so API deploys don't drop client connections.
  3. 3Add structured event versioning from day one instead of retrofitting it once the schema started moving.

Technical Deep-Dive

Architecture, specifications, and implementation details.

Payday — Production Readiness Checklist

Purpose: Verify that every feature, system, and integration is fully working before opening Payday to real paying members. This checklist is the single source of truth.

How to use:

  • Work top to bottom
  • Every item must be checked ✅ or explicitly waived with a reason documented
  • A waived item must have a follow-up date set
  • This document must be signed off by the lead engineer before go-live

Last reviewed: _______________
Signed off by: _______________
Go-live date: _______________


#SECTION 1 — Infrastructure & Docker

##1.1 Containers

  • All 6 containers start cleanly from fresh: docker compose down -v && docker compose up -d
  • payday-api container is running and healthy
  • payday-postgres container is running and healthy (pgvector/pgvector:pg16 image)
  • payday-redis container is running and healthy
  • payday-nginx container is running and healthy
  • payday-mailhog container replaced with real SMTP in production (mailhog removed)
  • payday-portainer secured with strong password or removed from production
  • All containers set to restart: always in production compose file
  • No dev-only volume mounts (.:/app) in production image
  • Production Dockerfile uses target: production (not development)

##1.2 Networking

  • All containers on payday-network bridge (172.20.0.0/24)
  • PostgreSQL port 5432 NOT exposed to public in production
  • Redis port 6379 NOT exposed to public in production
  • Only ports 80 and 443 exposed via Nginx
  • UFW firewall active: only 22, 80, 443 open (+ 1935 if streaming)
  • Docker socket not mounted in API container

##1.3 SSL / HTTPS

  • SSL certificate obtained (Let's Encrypt via Certbot or equivalent)
  • Certificate covers api.yourdomain.com
  • HTTPS enforced — HTTP redirects to HTTPS (301)
  • SSL certificate auto-renewal configured (cron job)
  • Strict-Transport-Security header present in Nginx config
  • Certificate expiry monitored (UptimeRobot or equivalent)

##1.4 Nginx

  • Production Nginx config (nginx.prod.conf) active (not dev config)
  • Rate limiting zones active: 100 req/min general, 10 req/min auth
  • WebSocket proxying working (/socket.io/ with Upgrade headers)
  • /uploads/ static file serving working
  • gzip compression enabled
  • Security headers set: X-Frame-Options, X-Content-Type-Options, X-XSS-Protection

##1.5 Server & Backups

  • Server sized appropriately: minimum 2 vCPU / 4 GB RAM for launch
  • Disk space: minimum 80 GB SSD
  • Database backup script (ci/db-backup.sh) tested and running on cron
  • Backup retention: 30 days minimum
  • Backup restore validated: ran ci/db-restore-validate.sh on a backup file — all checks pass
  • Backup files stored off-server (S3 or equivalent)
  • Log rotation configured on all containers (max-size, max-file limits)

#SECTION 2 — Database

##2.1 Schema

  • All 23 tables created (run \dt in psql — verify full list)
  • pgvector extension loaded: SELECT * FROM pg_extension WHERE extname='vector'
  • pg_trgm extension loaded
  • uuid-ossp extension loaded
  • All enums created (auth_provider_enum, membership_tier_enum, etc.)
  • All indexes created (run \di — check against 05_Indexes_and_Performance.sql)
  • IVFFlat index on member_profiles.embedding exists
  • All triggers active (\dT+ in psql — verify set_updated_at, recalculate_reputation, etc.)
  • All 12 default channels seeded

##2.2 Data Integrity

  • Reputation trigger tested: INSERT into reputation_eventsmember_profiles.reputation_score updates automatically
  • Comment count trigger tested: create comment → parent post comment_count increments
  • Resource rating trigger tested: add rating → resources.avg_rating recalculates
  • Soft delete working: deleted posts have deleted_at set, not hard-deleted
  • Foreign key constraints in place (test by attempting to insert orphan records)

##2.3 Performance

  • log_min_duration_statement=500 configured (slow query logging)
  • Connection pool: DB_POOL_MAX=20 confirmed
  • Test home feed query under load — responds under 50ms
  • Test member discovery query with filters — responds under 80ms
  • No DB_SYNC=true in production

##2.4 Seed Data

  • All @example.com test users removed from production database
  • Admin account created with a strong password (not the default seed)
  • Default channels present and active
  • No lorem ipsum content visible to real users

#SECTION 3 — Authentication & Authorization

##3.1 JWT

  • JWT_ACCESS_SECRET is 64+ characters, randomly generated
  • JWT_REFRESH_SECRET is 64+ characters, different from access secret
  • Access token expires in 15 minutes
  • Refresh token expires in 30 days
  • Refresh token rotation working: old token invalid after refresh
  • Max 5 refresh tokens per user (multi-device)
  • All tokens revoked on logout-all

##3.2 Registration & Login

  • Registration creates users record + member_profiles record
  • Slug auto-generated and unique
  • Welcome email queued and delivered (check SMTP logs)
  • Email verification token sent
  • Email verification link works and sets email_verified = true
  • Login returns access + refresh tokens
  • Login fails with wrong password (401)
  • Account lock: 5 failed attempts → locked 15 minutes → correct message shown
  • Account lock resets after successful login

##3.3 Password Reset

  • Forgot password sends reset email (check SMTP logs)
  • Reset token expires (configurable, default 1 hour)
  • Password reset link works and updates password hash
  • Old tokens invalidated after password reset
  • Weak passwords rejected (min 8 chars, uppercase, number, special char)

##3.4 Google OAuth

  • GOOGLE_CLIENT_ID and GOOGLE_CLIENT_SECRET set in production .env
  • Redirect URI registered in Google Cloud Console: https://api.yourdomain.com/api/v1/auth/google/callback
  • Google login flow completes end-to-end
  • New Google user: users + member_profiles created automatically
  • Returning Google user: existing account found by provider_id
  • Google user can update their profile (no password required)

##3.5 Apple Sign-In

  • APPLE_CLIENT_ID, APPLE_TEAM_ID, APPLE_KEY_ID, APPLE_PRIVATE_KEY set in .env
  • Service ID registered in Apple Developer Console
  • Redirect URI registered: https://api.yourdomain.com/api/v1/auth/apple/callback
  • Apple requires HTTPS — SSL certificate confirmed
  • Apple login flow completes end-to-end
  • Apple user's name stored on first login (Apple only sends name once)
  • Returning Apple user: existing account found by provider_id

##3.6 Guards & Role Enforcement

  • @Public() endpoints work without JWT
  • Protected endpoints return 401 without valid JWT
  • Expired access token returns 401
  • Admin routes return 403 for non-admin users
  • Moderator routes return 403 for regular members
  • @RequireTier('pro') routes return 403 for Starter users
  • @RequireTier('elite') routes return 403 for Pro users
  • Elite features (Deal Rooms) return 403 for Starter/Pro users

#SECTION 4 — Member Profiles & Discovery

##4.1 Profiles

  • Profile creation works on registration
  • All profile fields updatable via PATCH /members/me
  • Avatar upload works (multipart form, max size enforced)
  • Cover photo upload works
  • Avatar processed by media:process-image BullMQ job (resized to 400x400)
  • Slug generation: unique, URL-safe, auto-increments on collision
  • Profile view count increments on GET /members/:id
  • Verified badge visible on verified profiles
  • Availability status badge visible in directory
  • Social links stored and returned correctly

##4.2 Connections

  • Connection request sends notification to addressee
  • Connection accepted/rejected updates status correctly
  • Accepted connection: both users appear in each other's connections list
  • Blocked user: cannot send messages, connection requests, or see profile
  • Connection count visible on profile
  • PATCH /members/connections/:id with status: accepted works

##4.3 Member Discovery

  • Directory loads with default sorting (reputation DESC)
  • Filter by niche works
  • Filter by skills (array overlap) works
  • Filter by revenue stage works
  • Filter by availability works
  • Filter by isVerified works
  • Full-text search on name + tagline + bio works
  • Pagination works (page 1, page 2, etc.)
  • Response time under 80ms on filtered queries

##4.4 AI Match Suggestions

  • OPENAI_API_KEY set in production .env (or fallback mode confirmed working)
  • Embedding generated for new member on profile create/update
  • embeddings:generate BullMQ job processes successfully
  • pgvector IVFFlat index active on member_profiles.embedding
  • GET /members/suggested returns 10 members ranked by similarity
  • Results exclude: self, already connected, blocked users, inactive users
  • Results cached in Redis at matches:{userId} for 24 hours
  • Cache invalidated on profile update
  • Weekly embeddings:refresh-all cron job scheduled and tested
  • Fallback (no OpenAI key): skill-overlap suggestions returned instead of error

##4.5 Leaderboard

  • GET /members/leaderboard returns top 20 by reputation
  • Week and month filters work
  • Results cached in Redis leaderboard:all / leaderboard:week for 1 hour
  • Leaderboard updates when reputation events are inserted

#SECTION 5 — Community Feed

##5.1 Channels

  • All 12 default channels present (General, Wins, Paid Ads, E-commerce, Agency Life, Copywriting, Investing, Hiring, Tech & Tools, Mindset, Deal Room, Introductions)
  • GET /feed/channels returns active channels
  • Posts can be created in a specific channel
  • Posts without channelId appear in main feed

##5.2 Posts

  • Text post creates and appears in feed
  • Image post: file upload works, media_urls stored
  • Video post: upload works, duration validated
  • Link post: link_preview data populated
  • Poll post: poll_data stored correctly
  • Document post: PDF upload works
  • Posts appear in home feed for connections
  • Posts appear in channel feed for channel members
  • Announcements (is_announcement: true) appear for all members
  • Post edit works within 30-minute window, blocked after
  • Soft delete: deleted_at set, post hidden from feed
  • view_count increments on post view
  • Pinned posts appear at top of feed (admin only)

##5.3 Comments & Reactions

  • Comment creates as post with parent_id set
  • comment_count on parent post increments (trigger)
  • Threaded replies (comment on comment) work
  • All 6 reaction types work: fire, rocket, clap, money, heart, lightbulb
  • Reacting twice with same type = toggle off (idempotent)
  • reaction_counts JSONB updated correctly on react/unreact
  • Real-time post_reacted Socket.io event emitted after reaction
  • Reaction count visible in feed without page reload

##5.4 Saved Posts

  • POST /feed/posts/:id/save toggles save (save + unsave)
  • GET /feed/saved returns user's saved posts
  • Saved post still visible even if author is no longer a connection

#SECTION 6 — Direct Messaging & Deal Rooms

##6.1 Conversations

  • 1:1 DM creates conversation between two users
  • Creating DM with existing conversation partner returns existing conversation (no duplicates)
  • Group chat creation works with 2+ participants
  • Group chat name and avatar settable
  • Deal Room creation works (Elite tier only — tested with Pro → 403)
  • Inbox ordered by last_message_at DESC
  • unread_count visible per conversation in inbox

##6.2 Messages

  • Text message sends and appears for both participants
  • File upload sends: image, PDF, spreadsheet (multipart, 50MB limit enforced)
  • File type restrictions enforced (no .php, .exe, .sh, etc.)
  • Reply-to (quoted message) works — reply_to_id stored
  • Message soft-delete: deleted message shows "Message deleted"
  • Read receipts: read_by array updated when recipient views
  • last_message_preview updated on conversation after send
  • Message history loads newest-first with cursor pagination

##6.3 Real-Time Messaging (Socket.io)

  • new_message event received instantly by all conversation participants
  • typing_start event broadcasts to other participants
  • typing_stop event broadcasts (or auto-stops after 5s)
  • message_read event fires when recipient opens conversation
  • Client joins conversation:{id} room after opening conversation
  • Messages delivered to offline user via push notification (queued)
  • Socket.io connection authenticated via JWT on handshake
  • Invalid JWT on handshake → socket disconnected immediately
  • Redis adapter active for multi-instance pub/sub (DB 4)

#SECTION 7 — Opportunities Board

##7.1 Posting Opportunities

  • All 5 opportunity types work: full_time, freelance, partnership, revenue_share, jv
  • Starter tier → 403 on POST /opportunities (Pro+ required)
  • Compensation JSONB stores correctly for each type
  • skills_required array stores and filters correctly
  • Expiry date sets expires_at, cleanup job expires at midnight
  • opportunity_count increments on member_profiles for poster
  • Opportunity visible in directory immediately after posting

##7.2 Applications

  • Application creates with cover_letter and portfolio_urls
  • Duplicate application returns 409 Conflict
  • Closed/expired/filled opportunity returns 400 on apply
  • Poster receives in-app notification on new application
  • Poster can view all applications for their listing
  • Application status updates work: reviewing, accepted, rejected
  • Applicant notified when status changes
  • Applicant can view all their submitted applications

##7.3 Cleanup

  • cleanup:expire-opportunities cron runs daily at 2am
  • Expired opportunities show status: expired in listings
  • Expired opportunities excluded from default GET /opportunities response

#SECTION 8 — Events & Masterminds

##8.1 Event Creation

  • All event types work: virtual, in_person, hybrid, mastermind, webinar
  • Starter tier → 403 on POST /events (Pro+ required)
  • max_attendees enforced (RSVP blocked when full)
  • Free events (is_free: true) work without Stripe
  • Paid events (is_free: false) require Stripe checkout (implementation TBD)
  • Timezone stored and returned correctly
  • Stream key auto-generated on event creation (UUID, stored as events.stream_key)

##8.2 RSVPs & Notifications

  • RSVP creates event_attendees record
  • RSVP increments events.attendee_count
  • Second RSVP call cancels RSVP (toggle)
  • RSVP confirmation email queued and sent
  • Event reminder notification queued for 1 hour before starts_at
  • Reminder delivered via: in-app notification + email

##8.3 Live Streaming (RTMP)

  • tiangolo/nginx-rtmp container added to production docker-compose.yml
  • Port 1935 (RTMP ingest) open in firewall
  • OBS/Streamyard can connect to rtmp://yourdomain.com:1935/live/{streamKey}
  • Stream key verification endpoint working: POST /events/verify-stream-key
  • Invalid stream key rejected (403) — no unauthorized streams accepted
  • HLS output available: http://yourdomain.com:8080/hls/{streamKey}/index.m3u8
  • PATCH /events/:id/go-live sets status to live and emits event_started Socket.io event
  • event_started event received by all RSVPed attendees in event:{eventId} room
  • Stream URL included in event_started payload
  • Live event chat: attendees can send messages via send_event_chat Socket.io event
  • event_chat event broadcast to all room members
  • viewer_count emitted every 30 seconds to event room

##8.4 Event Completion & Recording

  • PATCH /events/:id/complete sets status to completed
  • recording_url stored when provided
  • All RSVPed attendees notified when recording is available
  • media:combine-hls BullMQ job merges HLS segments → MP4 (if self-hosted recording)
  • Replay available at events.recording_url in event detail

##8.5 Cleanup

  • cleanup:archive-events cron runs daily at 2am
  • Events past ends_at automatically set to completed if still live

#SECTION 9 — Resource Library

##9.1 Uploads & Approval

  • All 8 resource types work: template, sop, course, playbook, swipe_file, script, tool, other
  • Starter tier → 403 on POST /resources (Pro+ required)
  • File upload stores in uploads/resources/
  • New resource has is_approved: false — NOT visible in library until admin approves
  • Admin can approve resource via admin dashboard
  • Approved resource appears in library

##9.2 Discovery & Ratings

  • Library filterable by: type, niche, skill_level, tags, is_free
  • Full-text search works on title + description
  • Download count increments on resource download
  • Rating submission: 1–5 stars + optional review text
  • Duplicate rating returns 409 (one rating per user per resource)
  • resources.avg_rating and rating_count auto-updated by trigger

#SECTION 10 — Reputation & Leaderboard

##10.1 Reputation Events

  • profile_complete (+50): fires when onboarding_completed set to true
  • first_post (+25): fires on first post creation
  • post_got_10_reactions (+100): fires when reaction_counts total reaches 10
  • post_got_50_reactions (+250): fires at 50 reactions
  • connection_made (+20): fires when connection accepted
  • opportunity_posted (+75): fires on opportunity creation
  • opportunity_filled (+150): fires when opportunity status set to filled
  • event_hosted (+200): fires when event marked completed
  • resource_uploaded (+50): fires on resource upload
  • member_referred (+100): fires when referred user activates
  • content_removed (-50): fires on moderation removal action
  • All events append-only (no UPDATE or DELETE on reputation_events)
  • member_profiles.reputation_score auto-updates via PostgreSQL trigger

##10.2 Badges

  • Badge assignment works via admin dashboard
  • Badges visible on member profiles
  • Badges visible in member directory cards
  • Unique constraint: one badge type per user

##10.3 Leaderboard

  • Weekly leaderboard resets correctly on Monday
  • Monthly leaderboard resets on 1st of month
  • All-time leaderboard sorted by reputation_score DESC
  • User's own rank visible on leaderboard
  • Cache TTL: 1 hour (Redis leaderboard:all)

#SECTION 11 — Notifications

##11.1 In-App Notifications

  • All 12 notification types trigger correctly (see 12_Notifications_Module.md)
  • Notifications saved to notifications table
  • GET /notifications returns paginated inbox
  • meta.unreadCount in response reflects actual unread count
  • Mark single notification read: PATCH /notifications/:id/read
  • Mark all read: POST /notifications/read-all
  • Real-time delivery: notification Socket.io event to user:{userId} room
  • Notification visible without page refresh

##11.2 Email Notifications

  • Welcome email: delivered on registration
  • Email verification: link works and verifies account
  • Password reset: link works and is single-use
  • Event confirmation: delivered on RSVP
  • Event reminder: delivered 1 hour before event
  • Generic notification email: delivered for enabled notification types
  • All emails rendering correctly (not in spam — test with mail-tester.com)
  • From address is a verified sending domain (SPF, DKIM, DMARC configured)
  • Unsubscribe link present in all marketing/notification emails
  • Unsubscribe flow works and updates preferences

##11.3 Notification Preferences

  • Default preferences created for new users
  • GET /notifications/preferences returns full preferences object
  • PATCH /notifications/preferences updates preferences
  • Disabled email preference: notification saved to DB but no email queued
  • Disabled in_app preference: notification not saved, not delivered via socket

##11.4 BullMQ Email Queue

  • email queue processing in EmailProcessor
  • Failed jobs retry 3 times with exponential backoff
  • Failed job does not crash the application
  • Bull Board queue monitor accessible (at /api/v1/queues or via admin)

#SECTION 12 — Payments & Subscriptions

##12.1 Stripe Setup

  • Stripe account is live (not test mode) in production
  • All 3 products created in Stripe Dashboard: Starter ($29), Pro ($79), Elite ($197)
  • Price IDs copied to production .env: STRIPE_STARTER_PRICE_ID, STRIPE_PRO_PRICE_ID, STRIPE_ELITE_PRICE_ID
  • STRIPE_SECRET_KEY is sk_live_... in production
  • Webhook endpoint registered in Stripe Dashboard: https://api.yourdomain.com/api/v1/payments/webhook
  • STRIPE_WEBHOOK_SECRET copied to production .env
  • Stripe Customer Portal enabled and configured in Dashboard
  • Stripe Radar (fraud detection) enabled

##12.2 Checkout Flow

  • GET /payments/plans returns all 3 plans with correct prices
  • POST /payments/checkout { tier: 'pro' } returns checkoutUrl
  • Stripe Checkout page loads and accepts test cards
  • Successful payment → Stripe sends customer.subscription.created webhook
  • users.membership_tier updates to pro after webhook processed
  • User receives membership update notification
  • Failed payment → invoice.payment_failed webhook handled
  • Failed payment: subscriptions.status = 'past_due', email sent

##12.3 Billing Portal

  • GET /payments/billing-portal returns Stripe portal URL
  • Portal URL redirects to Stripe billing page
  • User can cancel subscription from portal
  • Cancellation → customer.subscription.deleted webhook
  • Post-cancellation: users.membership_tier downgraded to starter
  • Downgraded user loses Pro/Elite feature access immediately

##12.4 Webhook Reliability

  • Raw body middleware active in main.ts (rawBody: true)
  • Stripe signature verified on every webhook call
  • Invalid signature → 400 Bad Request returned
  • Webhook endpoint is @Public() (no JWT auth)
  • Idempotent: duplicate webhook events don't double-apply tier changes
  • Webhook processing tested with Stripe CLI: stripe listen --forward-to localhost/api/v1/payments/webhook

#SECTION 13 — Admin & Moderation

##13.1 Membership Applications

  • Application form works (if separate from registration — collect business details)
  • Application appears in admin queue: GET /admin/applications
  • Admin can approve application → user account created + welcome email sent
  • Admin can reject application → rejection email sent
  • Admin can waitlist application
  • Reviewer notes stored on each application decision

##13.2 Content Moderation

  • GET /admin/moderation-queue returns flagged content
  • Users can report a post (creates moderation queue item)
  • Users can report a message (creates moderation queue item)
  • Admin can remove content: post soft-deleted, reporter notified, poster notified
  • Admin can warn user: notification sent + logged in moderation_logs
  • Admin can suspend user: users.status = 'suspended', access blocked
  • Admin can ban user: users.status = 'banned', all tokens revoked
  • All admin actions logged in moderation_logs with moderator ID

##13.3 Analytics

  • GET /admin/analytics returns: DAU, MAU, totalMembers, newMembersThisWeek
  • Post count today, messages this week visible
  • Revenue this month visible (from Stripe or subscriptions table)
  • Churn rate calculated

##13.4 Broadcast

  • Admin can send broadcast to: all members, or by tier (starter/pro/elite)
  • In-app broadcast: notification delivered to all target users
  • Email broadcast: email queued for all target users
  • Broadcast visible in notification center

#SECTION 14 — Real-Time (Socket.io + Redis)

##14.1 Connection

  • Socket.io server starts on same port as HTTP (3000)
  • Nginx upgrades /socket.io/ path to WebSocket correctly
  • JWT verified on socket handshake — invalid token disconnects socket
  • User joins user:{userId} room on connect
  • User presence set in Redis on connect: presence:{userId} = 'online'
  • Presence expires after 5 minutes without heartbeat

##14.2 Room Management

  • join_conversation joins conversation:{id} room (verified by participation)
  • join_event joins event:{eventId} room (verified by RSVP)
  • Unauthorized room join denied
  • Room membership persists across reconnects

##14.3 All Events Tested

  • new_message delivered instantly in conversation room
  • message_read fires when conversation opened
  • typing_start and typing_stop broadcast to other participants
  • notification delivered to user:{userId} room
  • presence_update broadcasts on connect and disconnect
  • new_post emitted to feed:{channelId} room on post creation
  • post_reacted emitted after reaction toggle
  • event_started emitted to event:{eventId} room when event goes live
  • event_ended emitted when event marked complete

##14.4 Redis Pub/Sub Adapter

  • @socket.io/redis-adapter configured (Redis DB 4)
  • Multi-instance test: message sent via instance A received on client connected to instance B
  • Pub/sub client and sub client created correctly (separate Redis connections)

#SECTION 15 — Security Final Verification

##15.1 Secrets & Environment

  • .env is in .gitignore — no secrets in version control
  • JWT_ACCESS_SECRET ≥ 64 characters
  • JWT_REFRESH_SECRET ≥ 64 characters, different from access secret
  • COOKIE_SECRET ≥ 32 characters
  • All secrets generated with openssl rand -hex 32
  • BCRYPT_SALT_ROUNDS=12 confirmed
  • No console.log statements logging passwords, tokens, or PII

##15.2 API Security

  • ValidationPipe with whitelist: true, forbidNonWhitelisted: true active globally
  • HttpExceptionFilter active globally (no stack traces in prod error responses)
  • SWAGGER_ENABLED=false in production
  • No sensitive data in error messages returned to clients
  • SQL injection: all queries use TypeORM repository pattern (parameterized)
  • XSS: user-generated HTML content sanitized before storage
  • CSRF: checked for all state-changing endpoints
  • Helmet.js security headers active

##15.3 Run Automated Checks

  • ./ci/healthcheck.sh — all checks pass
  • ./ci/release-gate.sh — all gates pass (exit code 0)
  • ./ci/db-restore-validate.sh backup_file.sql.gz — all checks pass

#SECTION 16 — Compliance

  • Terms of Service live at public URL
  • Privacy Policy live at public URL
  • Age gate on registration (18+ confirmation required)
  • Consent checkboxes: ToS, Privacy Policy (required), Marketing email (optional)
  • Consent timestamps stored in users table
  • DELETE /members/me/account full GDPR erasure flow tested
  • GET /members/me/data-export returns all user data as JSON
  • Email unsubscribe link in all notification emails
  • Unsubscribe flow tested end-to-end
  • Stripe: only Stripe IDs stored — no card data anywhere in DB
  • "Do Not Sell" language in Privacy Policy
  • Apple Sign-In implemented (required for iOS app if any social login used)
  • App Store Privacy Labels completed (when mobile app submitted)

#SECTION 17 — Monitoring & Observability

  • GET /health endpoint returns { status: "ok" } with DB + Redis info
  • Uptime monitor configured (UptimeRobot or equivalent), alert on downtime
  • Container crash alerts configured (Portainer alerts or Docker health check alerts)
  • docker compose logs accessible and structured (JSON format)
  • PostgreSQL slow query log active (log_min_duration_statement=500)
  • Log rotation configured on all containers
  • Cron jobs verified running: backup, leaderboard refresh, cleanup, embedding refresh
  • Test ci/healthcheck.sh gives clean output

#SECTION 18 — Final Sign-Off

##Feature Completeness Checklist

FeatureSpecAPIDBTestsProd Ready
Member Onboarding & Verification
Member Profiles
Discovery & Networking
AI Match Engine
Community Feed
Channels
Direct Messaging
Deal Rooms (Elite)
Real-Time Socket.io
Opportunities Board
Events & Masterminds
Live RTMP Streaming
Resource Library
Leaderboard
Reputation System
Admin Dashboard
Content Moderation
Notifications (In-App)
Notifications (Email)
Stripe Subscriptions
Google OAuth
Apple Sign-In
JWT Auth
Member Tier Gating
GDPR Erasure
Data Export
Docker Infrastructure
CI Scripts (backup, health, gate)

##Final Approval

Lead Engineer:          ________________________   Date: __________

Product Manager:        ________________________   Date: __________

Security Review:        ________________________   Date: __________

Go-Live Approved:  ☐ YES   ☐ NO — Reason: _________________________
~ End of Document ~