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Dusko Licanin
Full-Stack Engineer — Production SaaS in 8–12 Weeks
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Dusko is ready for their next project!
How do you keep one tenant's support email out of another customer's inbox?
Resend's inbound webhooks hand you a parsed message, but threading and routing stay yours. I keyed it off a per-tenant inbound address and stitched replies with In-Reply-To. Attachments needed their own...
Everyone debates which rate-limit algorithm to use. That's almost never what causes the outage.
Token bucket or sliding window barely matters next to the bucket key. Key on IP and a whole office behind one NAT shares a budget. The limiter also has to run after auth, or you're...
When password resets land in spam, everyone blames the email provider. It's almost always the DNS.
SPF, DKIM, and DMARC are the three records that fix it. Sending from a subdomain like mail.yourapp.com keeps a bad reputation from poisoning your root domain.
The whole checklist is...
Most teams reach for multi-region long before a user feels latency.
Triggers are data-residency law and a paying region past the latency budget, not vanity. Under ~150ms added latency a Supabase read replica usually wins, and going multi-region early sinks you on egress costs.
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We treated GDPR as a legal checklist until the first deletion request landed. Then it was an engineering problem.
What worked was wiring erasure and subject-access flows into the schema itself, plus a data inventory that maps every table to a sub-processor. About two weeks once...
