Engineering Blog

Mar 11, 2025

Email Deliverability Best Practices | A Developer's Guide to Avoiding the Spam Folder

A technical guide designed for software developers, including technical requirements and best practices ensuring product-to-user emails reach the inbox.

6 min read

Feb 19, 2025

Auth.js Magic Link: Custom Email Provider + Code Samples (2025)

Learn how to use a custom email provider for sending Auth.js magic link emails. Step by step guide with code examples for Node.js, Next.js and TypeScript.

8 min read

Feb 11, 2025

Send Custom Notifications from Supabase - With Example (2025)

Send custom Email, SMS, In-App and other types of notifications from Supabase with one library. Including code example using TypeScript and Supabase Edge Functions.

12 min read

Jan 30, 2025

A2P 10DLC Registration: The Ultimate Developer's Guide (2025)

A practical guide to A2P 10DLC for developers at SaaS or startup companies wanting to send SMS to US. Step-by-step instructions and Twilio setup included.

20 min read

Aug 10, 2024

Hidden Scalability Bottlenecks In User Notifications

This article covers the not-so-obvious bottlenecks that cause scalability issues in the Notification Service of your software, along with easy-to-implement remedies.

10 min read

Jul 25, 2024

Building a Notification Service: Top Technical Mistakes

Sending product-to-user notifications looks easy. But this blog post lists software teams' critical technical mistakes when implementing their notification service.

12 min read

Jul 25, 2024

Notification Service Design | The Ultimate Guide with Diagrams

The essentials for designing a full-featured Notification System to send product-to-user notifications at scale for less. Compatible with AWS, Azure, and GCP.

22 min read

Jul 25, 2024

Serverless Notification Service Design in AWS - with diagrams

In this article, we design a fully Serverless Notification Service using AWS to send product-to-user notifications. Fully scalable, extensible, with minimal cost.

12 min read

Jul 25, 2024

Top Non-Technical Mistakes With Your Notification Service

This article discusses the common mistakes that engineers make when building their own notification service; Mistakes that are easy to resolve with a little help.

12 min read

Jul 25, 2024

Ultimate Guide on Notification Services - A Technical Overview (2024)

Do you need a 3rd-party notification service? In this article, we review the challenges of a typical notification project and review the viable solutions.

15 min read

Feb 5, 2024

The Developer's Guide to Google Bulk Sender Requirements

A step-by-step technical guide for developers and SaaS companies that want their email notifications to comply with Google's and Yahoo's new bulk sender policies.

17 min read

Jun 8, 2022

How to prevent AWS SES review and suspension

Developers may find their AWS SES account banned even if they never sent any spam. Follow these best practices to prevent your SES from being reviewed and suspended.

18 min read

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Engineering

Email Deliverability Best Practices | A Developer's Guide to Avoiding the Spam Folder

Auth.js Magic Link: Custom Email Provider + Code Samples (2025)

Send Custom Notifications from Supabase - With Example (2025)

A2P 10DLC Registration: The Ultimate Developer's Guide (2025)

Hidden Scalability Bottlenecks In User Notifications

Building a Notification Service: Top Technical Mistakes

Notification Service Design | The Ultimate Guide with Diagrams

Serverless Notification Service Design in AWS - with diagrams

Top Non-Technical Mistakes With Your Notification Service

Ultimate Guide on Notification Services - A Technical Overview (2024)

The Developer's Guide to Google Bulk Sender Requirements

How to prevent AWS SES review and suspension

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