A
t Mailin.
ai, we're building the next generation of email infrastructure and outbound automation. Our platform powers high-volume outbound campaigns for businesses that rely on reliable, scalable email delivery.
We're looking for a Senior Full-Stack Engineer who can take ownership of building a production-grade email sequencing platform comparable to Instantly, Smartlead, Apollo, or Lemlist—designed for scale, reliability, and exceptional user experience.
This isn't a maintenance role. You'll architect, build, and ship core platform capabilities that send millions of emails while maintaining industry-leading deliverability.
What You'll Build
You'll own major parts of our outbound automation platform, including:
Email Campaign Engine
- Multi-step email sequences
- Campaign scheduling and business hours
- Smart follow-up automation
- Conditional branching based on opens, replies, clicks, bounces,
and custom events
- Campaign throttling and rate limiting
- Queue-based email processing
Lead & Contact Management
- CSV and API imports
- Lead segmentation and tagging
- Custom fields and dynamic variables
- Duplicate detection
- Personalization engine