Mario Kostelac (@mariokostelac) on X (Twitter)

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Mario Kostelac is a 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.

Observed facts (from the public profile):

Profile bio

⚡️ Productionalizing Machine Learning @fin_ai

What this creator posts about, and who reads it (AI-inferred)

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

Provenance: inferred by AI from public content, not stated by the creator — confidence 0.40 · read from 8 recent posts · updated 78 days ago.

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 (what the inference above was drawn from)

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)

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