01 — Splash

⚡

NexQueue

AI-First Multi-Vertical Platform

AVEOSOFT

Marketplace · Immigration · Real Estate

02 — Developer Login

9:41

●●●

Welcome Back

✉️

🔐

🔑

SSO / Magic Link

Enterprise login available

→

01 — Queue Dashboard

app.example.com/notification-queue

Notification Queue — Live Monitor

1,284

Enqueued Today

47

Pending

12

Failed

99.1%

Success Rate

All Jobs

Pending

Failed

Completed

📧

Email — Welcome to Marketplace

ZeptoMail · user@example.com · 09:31 AM

Sent

📱

SMS — Immigration Case Update

Twilio · +1-555-0192 · 09:28 AM

Pending

🔔

Push — New Property Match Alert

OneSignal · device_id_a3f2 · 09:12 AM

Failed

📧

Email — Invoice #INV-2041

ZeptoMail · buyer@market.io · 09:05 AM

Sent

3 retries exhausted on JOB-00847 — manual review needed

02 — Enqueue Notification

app.example.com/notification-queue

Enqueue New Notification

Email

SMS

Push

👤

📝

🗂️

Priority Queue (skip to front)

Schedule for later (cron / delayed)

03 — Job Detail & Retry

app.example.com/notification-queue

Job #JOB-00847 — Failed

🔔

Push — Property Alert · OneSignal

Target: device_a3f2xx · user_id: u_4421 · Failed after 3 retries

09:12

Enqueued

Triggered by listing match engine

09:12

Attempt 1 — Failed

OneSignal error: device token expired

09:17

Attempt 2 — Failed

Retry backoff 5s · Same error

09:27

Attempt 3 — Failed

Retry backoff 30s · Max retries reached

Status: FAILED · Dead Letter Queue

01 — Case Overview

9:41

●●●

Immigration Cases

38

Active Cases

5

Expiring Soon

12

Docs Pending

3

Approved

All

H-1B

Green Card

OPT/STEM

Spouse

🗂️

Priya Mehta — H-1B Transfer

Case #IMM-2041 · I-129 Submitted

In Review

🗂️

Carlos Rivera — Green Card

Case #IMM-2038 · PERM Filed

Pending

⚠️

Wei Zhang — OPT Extension

Case #IMM-2035 · Expires in 14 days

Urgent

2 cases need document upload

Dashboard

Queue

Verticals

Workers

Account

02 — Case Detail & Timeline

9:41

●●●

Priya Mehta — H-1B Transfer

📋

Case #IMM-2041

Employer: TechCorp Inc. · Attorney: Jane Doe, Esq.

Case Progress65%

Jan 15

Petition Initiated

I-129 packet prepared & filed

Feb 02

USCIS Receipt

Receipt #EAC2500123456

Feb 28

RFE Issued

Additional evidence requested by USCIS

Mar 18

RFE Response Filed

Supporting documentation submitted

Dashboard

Queue

Verticals

Workers

Account

01 — Seller Dashboard

9:41

●●●

My Marketplace

24

Active Listings

$8,420

Revenue MTD

91%

Fulfillment

4.8★

Rating

Listings

Orders

Payouts

Reviews

📦

Ergonomic Desk Chair Pro

SKU-4421 · $349 · 8 in stock

Active

📦

Standing Desk Electric

SKU-4418 · $699 · 2 in stock

Low Stock

📦

Monitor Arm Dual Mount

SKU-4409 · $129 · 0 in stock

Out

Dashboard

Queue

Verticals

Workers

Account

02 — Orders & Stripe Payouts

9:41

●●●

Orders & Stripe Payouts

💳

Stripe Connect Balance

Available: $2,140.00 · Pending: $680.00

🛒

Order #ORD-8821

Standing Desk Electric · alex@email.com

$699

🛒

Order #ORD-8819

Ergonomic Chair × 2 · sara@co.io

$698

✅

Payout #PAY-441

Transferred Mar 18 · Chase ****4421

$1,200

Monthly Payout Threshold82%

Dashboard

Queue

Verticals

Workers

Account

01 — Property Listings

9:41

●●●

Real Estate Listings

For Sale

For Rent

Commercial

New Dev

aerial city map of Austin TX with clustered property pins in indigo and green across neighborhoods like Rainey St, South Congress, Mueller

🏠

2408 Rainey St, Austin TX

3bd / 2ba · 1,850 sqft · $645,000

🏢

Downtown Condo Unit #1204

2bd / 2ba · 1,100 sqft · $2,800/mo

AI Match: 94% fit for your search criteria

Dashboard

Queue

Verticals

Workers

Account

02 — Property Detail & AI Valuation

9:41

●●●

2408 Rainey St — Detail

modern single-family home exterior with large floor-to-ceiling windows, manicured front lawn and mature oak trees, Austin TX suburban street

$645K

List Price

3/2

Bed/Bath

1,850

Sq Ft

2019

Year Built

📍

Rainey Street District

Walk Score 88 · Bike Score 92

🏦

Est. Mortgage

$3,210/mo at 6.8% · 30yr fixed

Dashboard

Queue

Verticals

Workers

Account

01 — Upstash Redis Queue Health

app.example.com/worker-job-monitor

Upstash Redis — Queue Health

3

Active Workers

47ms

Avg Latency

2,041

Jobs Today

0

Dead Queue

email-queue

sms-queue

push-queue

dead-letter

email-queue throughput72%

sms-queue throughput45%

push-queue throughput88%

⚙️

Worker #1 — email-processor

Cloudflare Worker · Last heartbeat 4s ago

Healthy

⚙️

Worker #2 — sms-processor

Render Service · Last heartbeat 12s ago

Healthy

All systems nominal

02 — Dead Letter Queue Review

app.example.com/worker-job-monitor

Dead Letter Queue — Manual Review

4 jobs in dead letter queue

💀

JOB-00847 — Push / OneSignal

Failed 3× · device token expired · user_id: u_4421

Retry

💀

JOB-00831 — Email / ZeptoMail

Failed 3× · domain unverified · to: dev@startup.io

Retry

💀

JOB-00819 — SMS / Twilio

Failed 3× · invalid phone +1-555-0000

Discard

💀

JOB-00801 — Push / OneSignal

Failed 3× · app uninstalled · user_id: u_3309

Discard

03 — Notification Delivery Log

app.example.com/worker-job-monitor

Notification Delivery Log — Neon DB

All

Email

SMS

Push

Errors

✅

Email Sent — Case Update IMM-2041

ZeptoMail · priya.mehta@email.com · 09:31 AM

200ms

✅

SMS Sent — OTP Verification #8841

Twilio · +1-555-0192 · 09:28 AM

310ms

❌

Push Failed — Property Alert

OneSignal · device_a3f2 · 09:12 AM

Error

✅

Email Sent — Invoice INV-2041

ZeptoMail · buyer@market.io · 09:05 AM

180ms

✅

Push Sent — New Message Alert

OneSignal · device_b8c1 · 08:55 AM

95ms

Logs retained 30 days · Stored in Neon PostgreSQL

Feature Stack & Deliverables

Complete overview of confirmed features, deliverable items, and technical architecture for NexQueue.

🏗️

Tech Stack

Next.js App RouterUpstash RedisNeon PostgreSQLStripe ConnectTwilio + OneSignalZeptoMail

⚡

Core Technologies

▲

Next.js App Router — Full-stack framework with API routes, SSR & edge functions

🗄️

Upstash Redis — Serverless Redis for job queues, retry logic & rate limiting

🐘

Neon PostgreSQL — Serverless Postgres for notification logs & status tracking

💳

Stripe Connect — Marketplace payouts, escrow & subscription billing

📱

Twilio + OneSignal — SMS delivery and cross-platform push notifications

📧

ZeptoMail — High-deliverability transactional email service

📦

V1 Deliverables Checklist

Notification Queue System with Upstash Redis (email, SMS, push channels with priority lanes)
API endpoint POST /api/notifications/enqueue with Zod payload validation
Worker processors for ZeptoMail, Twilio, OneSignal with 3× exponential backoff retry
Neon DB schema: notification_jobs table (status, attempts, channel, payload, logs)
Dead letter queue handling with manual retry endpoint and admin UI
Queue health dashboard: live worker status, throughput metrics, delivery logs
Immigration Case Portal with USCIS timeline tracker and document upload
Marketplace Seller Dashboard with Stripe Connect payout integration
Real Estate listing portal with AI-powered property match scoring
Modular folder structure: /lib/queue · /lib/notifications · /workers · /app/api

🔧

Architecture Layers

API Layer

Next.js App Router

POST /api/notifications/enqueue · GET /api/queue/status · POST /api/queue/retry · Vertical APIs: /api/immigration · /api/marketplace · /api/real-estate

Queue Layer

Upstash Redis + BullMQ

email-queue · sms-queue · push-queue · dead-letter-queue · priority lanes · scheduled/delayed jobs · concurrency controls

Worker Layer

Cloudflare Workers / Render

email-processor (ZeptoMail) · sms-processor (Twilio) · push-processor (OneSignal) · exponential backoff: 5s → 30s → 120s

Data Layer

Neon PostgreSQL

notification_jobs · case_files · marketplace_listings · real_estate_properties · delivery_logs · user_profiles

Auth & Payments

NextAuth.js + Stripe Connect

GitHub OAuth · Magic Link email · Role-based access (admin / agent / buyer / seller) · Stripe Connect marketplace payouts · webhook handlers

NexQueue

NexQueue & Login

NexQueue

Notification Queue

Immigration Case Portal

Marketplace Listings

Real Estate Portal

Worker & Job Monitor

NexQueue

Feature Stack & Deliverables

Tech Stack

Core Technologies

V1 Deliverables Checklist

Architecture Layers