Field notes · topic
3 posts on Backend.
One click on Send, six hops, five DNS records and a handshake in plain text.
You press Send and a second later it lands on the other side of the world. Here is the whole journey: SMTP, the servers it passes through, and the DNS records (MX, SPF, DKIM, DMARC) that decide whether it reaches the inbox or the spam folder.
gRPC and Protocol Buffers in plain words, and where REST still wins.
Why services inside a system often talk gRPC instead of JSON over HTTP, what a .proto file gives you, and where REST still fits.
From polling to WebSockets: the whole story, with diagrams.
How the web went from asking "anything new?" over and over to one open, two-way connection. The tricks that came before, how a WebSocket actually works, and when you should and should not use one.
Tell me what eats your team's week. I'll tell you what I'd automate first.
Start a project Remote · PrimeX Meta, Dubai · teams across time zones