# Backend Engineer (.NET) – WhatsApp/WABA at Sent

- Company: Sent
- What the company does: One API for all messaging channels. Send SMS, WhatsApp, and RCS messages with automated routing, compliance, and formatting. Start building today. Backed by Bessemer.
- Company website: https://www.sent.dm/
- Type: Startups
- Level: Mid level
- Location: Kosovo
- Work setup: On-site
- Posted: 2026-04-24
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/sent/af18a693-fd89-4ad5-bffe-7b447cf67494
- Page: https://www.1752.vc/careers/jobs/sent-backend-engineer-net-whatsapp-waba/

## About the role

Sent is building the messaging infrastructure that powers how businesses communicate with their customers. We provide a unified API for SMS, WhatsApp, iMessage, and RCS, making it simple for developers to reach people across multiple messaging channels. Following our recent Series A funding, we're growing rapidly and building the future of business messaging.

## What they're looking for

- 3+ years of professional experience with C# / .NET / ASP.NET Core building production backend services
- Hands-on experience with the WhatsApp Business Platform (WABA), WhatsApp Cloud API, or WhatsApp Business APIs
- Experience working with WhatsApp messaging workflows, including webhooks, message templates, delivery statuses, and messaging events
- Strong experience designing, building, and maintaining RESTful APIs
- Strong understanding of asynchronous systems, webhooks, queues, retries, and event-driven architectures
- Solid knowledge of relational databases, including schema design, efficient queries, and data integrity

Tags: Engineering