Umar

Product & AI Engineer. I build production-grade systems, not just wrappers. Bridging full-stack (Next.js, FastAPI, Postgres) with applied AI and autonomous work

[Umar @shadowofumar]

If you validate LLM tool calls with Pydantic, don't just reject the bad ones.

Send the validation error back to the model as the next message: which field failed and why.

Most of the time the second attempt is correct. Cap it at one or two retries, then fail loudly.

[Umar @shadowofumar]

Building AI products for Nigerian users taught me this:

Nobody wants to download your app.

But everyone has WhatsApp open all day.

If your users live in chat, your product should too. The interface people never close beats the one they forget to open.

[Umar @shadowofumar]

@zachteramura Let’s connect bro 😎

[Umar @shadowofumar]

Let’s connect maybe we might build something great 😌

[Darius Pop @tyd3n_]

BUILDERS ONLY.

If you’re actually building something right now, let’s #connect.

[Miracle Nnamdi @Miracle_NNnn]

💬 Pitch your startup

Drop your link below 👇

Let's see what you are building today

#BuildInPublic

[Umar @shadowofumar]

@lalitnamdev_ Let’s connect bro 💪🏾

[Light Silver @lightsilver323]

you never know who might DM you

drop your project URL

[Umar @shadowofumar]

Very valid question but at the end it comes to the app’s purpose what do y’all think?

[Gaus @Gaus450]

Why build a mobile app first when a web app can reach everyone?

[Umar @shadowofumar]

@Miracle_NNnn But lunching in all of these dosent guarantee anything

[Umar @shadowofumar]

@shakhzod1001 Damn and I just paid for max plan

[Umar @shadowofumar]

Damn and I just subscribed for Max

[Shakhzod Karimov @shakhzod1001]

🚨 claude users !!

Codex IS COOKED !!

Claude is giving away Claude Pro for 1 year for FREE.
In just MINUTES.

Hurry and get it now.

[space @spacedevin]

Promote ur website or app URL

What are you building right now?

[Umar @shadowofumar]

@suraj_sharma14 Amazing stuff

[Suraj Sharma @suraj_sharma14]

I made a private group for builders.

698+ people are already inside.

What you get:
- Hackathons, grants and accelerators before everyone else
- 0% equity funding and visa programs, the ones I post here first
- AI tools and free credits worth claiming
- Remote jobs and internships
- Builders shipping the same stuff as you

Just opportunities, every week.

Want in? Reply "builder" and I'll send the link 👇

[Umar @shadowofumar]

Orbit is in beta.

If you freelance or juggle multiple projects, I'd love you to use it free for 2 weeks and tell me honestly what's broken.

Reply "orbit" and I'll DM you the link.

[Umar @shadowofumar]

Every freelance dev I know runs their business on the same "system":

Deadlines scattered across client WhatsApp chats and memory.

So instead of building another dashboard, I built Orbit: a project manager you just text on WhatsApp.

How it works under the hood 🧵

[Umar @shadowofumar]

Stack:
FastAPI
PostgreSQL + pgvector (Supabase)
Gemini
Groq Whisper
WhatsApp Cloud API
Paystack

Biggest lesson: the best interface for a productivity tool might be the one people never close.