Kashif Umar

Senior backend developer.
Thinking about systems, architecture & AI.
Learning in public. No hype.
Movies and Football.

[Kashif Umar @kashif_umar]

Most developers think experience means knowing more tools.
Real experience is knowing:
– what not to build
– when simple beats clever
– why systems fail
I’m relearning modern architecture & AI from first principles.
No hype. Just clarity.

[Kashif Umar @kashif_umar]

Good developers are afraid of being wrong.

Senior engineers have been wrong so many times they've built a system for it.

The skill isn't knowing the right answer.
It's making the best call with incomplete information — and changing it when you learn more.
#SoftwareArchitecture

[Kashif Umar @kashif_umar]

Most developers perform competence long before they have it.

Performance is exhausting — you spend more energy managing perception than actually learning.

Saying "I don't know" in rooms where you feel pressure to know is the fastest feedback loop there is.

#SoftwareEngineering

[Kashif Umar @kashif_umar]

The best use of AI isn't code generation.

It's thinking out loud with something that never gets tired of the conversation.

The value isn't the output — it's what the conversation reveals about your own thinking.

#AIEngineering #SoftwareArchitecture

[Kashif Umar @kashif_umar]

23 years building software for other people.

This one's mine.

If you freelance on Upwork — try it. If you know someone who does — share it.

Completely free. No account. Your data never leaves your device.

#BuildInPublic #Upwork #SoftwareEngineering

[Kashif Umar @kashif_umar]

Just shipped my first ever browser extension. 🚀

UpTrack — free for Upwork freelancers. Hides jobs you've already reviewed so every search shows only fresh listings.

Chrome → https://t.co/ZkTKupAyDa

Edge → https://t.co/19qvXWaXXd

Firefox → https://t.co/k16Ytwf6Qb

[Kashif Umar @kashif_umar]

Upwork shows you the same jobs every search. No way to mark a listing as reviewed. You waste time re-reading cards you already decided against.

UpTrack fixes that automatically. One click. Three statuses — Bid Done, Skip, Check Later.

Every future search — only fresh listings.

[Kashif Umar @kashif_umar]

"Proven elsewhere" feels safer to decision-makers than "proven here."

Even when the evidence — sitting right in front of them — says otherwise.

This is why companies hire externally over strong internal candidates.
And why their best people quietly start looking elsewhere.

[Kashif Umar @kashif_umar]

I wrote about developers waiting 4 certainty that never comes.
Then realized I was describing myself.
23 years in. Still learning to move before I feel ready.
The certainty you're looking for only comes after the decision. Never before.
#SoftwareEngineering #SoftwareArchitecture

[Kashif Umar @kashif_umar]

Legibility is an architectural decision — not an accident.

Write code for someone capable who has zero context.

That's almost always who inherits your code.

#SoftwareEngineering #BackendDevelopment

[Kashif Umar @kashif_umar]

7 years ago I built a unified auth gateway for all company systems.
Management shelved it.
Last year they hired an external developer to build the same thing.
That system is now in use.
It still has bugs.

The quality of an idea has very little to do with whether it gets adopted.

[Kashif Umar @kashif_umar]

The faster I can solve a technical problem, the less patience I have for people still figuring it out.

Not outwardly. But internally.

Experience doesn't automatically make you a good guide. Sometimes it makes you a worse one.

#SoftwareEngineering #AIEngineering

[Kashif Umar @kashif_umar]

https://t.co/t3LtZWAfkb

[Kashif Umar @kashif_umar]

Knowing what to leave alone is not passivity.

It's the hardest form of discipline in a craft that rewards action.

The mess that looks like it needs fixing is often load-bearing.

#SoftwareEngineering #BackendDevelopment

[Kashif Umar @kashif_umar]

In 2017 my manager gave me 2 days to build first module of a system.
I took 2 weeks to get the architecture right.
That system is still running today. 720+ routes. 450+ API endpoints. Nobody afraid to touch it.
The 2 days would have shipped a module.
2 weeks shipped a system.

[Kashif Umar @kashif_umar]

Before every AI-assisted feature, ask one question:

"If the AI is wrong, what happens?"

Most teams evaluate AI on the upside.
Architecture is mostly about designing for when things don't work.

#AIEngineering #SoftwareArchitecture

[Kashif Umar @kashif_umar]

The worst thing you can do when dropped into an unfamiliar broken system is start reading code.

You'll get lost. Every time.

Follow the data, not the code.

#BackendDevelopment #SoftwareEngineering

[Kashif Umar @kashif_umar]

Good developers are afraid of being wrong.

Senior engineers have been wrong so many times they've built a system for it.

The skill isn't knowing the right answer.
It's making the best call with incomplete information — and changing it when you learn more.

#SoftwareEngineering

[Kashif Umar @kashif_umar]

AI can write the code.

Only your team can own it.

"Who is responsible for this when it goes wrong?" is the question most teams skip before merging AI-generated code.

#AIEngineering #SoftwareArchitecture

[Kashif Umar @kashif_umar]

A good PR review is a conversation about the system's future.

Not a judgement of the developer's present.

Most reviews get this backwards.

#SoftwareEngineering #BackendDevelopment

[Kashif Umar @kashif_umar]

@Govindtwtt The language doesn't matter much. The failure experience does.

[Kashif Umar @kashif_umar]

@Govindtwtt Good list. I'd add one thing above all of it: learn how systems fail, not just how they work.

You can know every item on this list and still struggle in production if you've never debugged a replication lag, chased a memory leak, or traced a cascading failure across services.