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Client case studyCommunication Infrastructure
Bulk Email Platform
Scalable mailing engine with campaign builders and delivery tracking reports.
Headline results
- Volume
- 1.2M / mo
- Cost savings
- 60% saved
- Delivery rate
- 98.4%
The project in 5 images
5 summary slides
01Overview
The project at a glance
A private communication platform enabling marketing agencies to coordinate subscriber lists, edit templates, and launch large campaign dispatches.
- Type
- Client case study
- Category
- Communication Infrastructure
Tech stack
- React
- Node.js
- Redis
- MongoDB
- Tailwind CSS
02The challenge
What wasn't working
Standard cloud options charged premium tiers as subscriber lists expanded, introducing strict throttling limits on transactional mails.
The brief
A marketing client faced high subscription costs on standard SaaS platforms while needing custom template structures.
03The solution
How it was built
Built a private email delivery infrastructure utilizing queue workers and local campaign templating engines.
Node.js dispatchers pull contacts from MongoDB databases, feed campaigns to a Redis queue buffer, and call SMTP servers in multi-threaded batches.
- InterfaceReactTailwind CSS
- APIs & logicNode.js
- DataMongoDB
- Infra & asyncRedis
04Key features
What it does
- 01In-app drag-and-drop campaign template constructor.
- 02Subscriber listing segmentation with smart dynamic tags.
- 03Mailing analytics tracking clicks, bounces, and unsubscribes.
- 04Automatic queue retry mechanisms to minimize delivery errors.
05Results
What changed
Saved the client 60% in subscription fees and achieved a steady 98.4% delivery rate across 1.2 million monthly dispatches.
Next step
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