Mario Kostelac (@mariokostelac) — Developer tools / infra on X (Twitter)
Mario Kostelac is a Developer tools / infra creator on X (Twitter) in the 1K–2K follower range, publishing for ML engineers and developers building production ML systems, mainly at AI startups and fintech companies. Profile last checked 2026-07-07.
| Field | Value |
| --- | --- |
| Platform | X (Twitter) |
| Handle | @mariokostelac |
| Followers | 1K–2K |
| Category | Software · Developer tools / infra |
| Audience function | developers |
Profile bio
⚡️ Productionalizing Machine Learning @fin_ai
What this creator posts about, and who reads it
Recurring topics: Productionalizing ML models, AI coding tools and automation, Kubernetes and AWS infrastructure, Team hiring in AI, Fintech ML applications
Audience: ML engineers and developers building production ML systems, mainly at AI startups and fintech companies
Audience read from this creator’s own recent posts, not from platform-declared categories. It is our reading, and it can be wrong.
Recent content samples
Such a good move for Wasp. I remember I was pushing them to do it years ago (5 to be more precise), but the tech just wasn't there. 👏👏👏
This is the reason I was super busy last few months. We were building our own models for Fin. Btw my team is hiring. If you think this TTFT drop is not impressive, come, join, and help us bring it further down.
This setup we have beats the best engineer in spelunking what happened on our kube cluster. And reports issues to aws automatically.
It's here, you don't need to wait 6-12 months. I've written 0 lines manually this year. And yes, I shipped a lot.
See the original post on X (Twitter)
Where this creator sits in the wider pool
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