Why we built this.
We're Navian AI. We build Navian Pulse, a real-time decision engine for banks. It scores each event in under a millisecond and decides, in that moment, whether to let money move.
When a payment is about to leave someone's account, Pulse is the thing that says yes or no. So a bug here isn't an annoyance — it's a wrong answer on a real person's money.
We built Pulse the way the fastest teams build now: we leaned heavily on generative AI to write the code.
That's how a small team ships something this ambitious, this fast.
But AI can't sense the failures that only appear when timing and bad luck line up — a crash mid-write, two things colliding, a number quietly wrong. They pass every normal test and surface only in production.
So we built tools that make those failures reproducible. A failing run becomes a seed. Feed the seed back and you get the exact same failure — every run, every machine, until it's fixed.
And here's the part that makes it work: none of this costs a token. You don't write a hundred thousand tests — you write one, and the simulator runs it a hundred thousand ways, each from a different seed.
The AI writes the code. The simulator generates the chaos — for a fraction of a second of CPU, and not one token.
Where a team hand-writes fifty tests, our simulator runs hundreds of thousands of distinct failure scenarios in minutes.
Fifty tests find the bugs you thought of. Hundreds of thousands find the ones you didn't.
If AI writes 10× the code, you have to test it 1,000× harder — and now you can, because the testing scales for nothing.
None of this is specific to banks. The moment AI writes a meaningful share of your code, the bottleneck moves from writing it to proving it holds up. So we're open-sourcing the tools we built for ourselves — starting with navian-dst.
We built these because we needed them. We're sharing them because you probably do too.
I built these tools so our own small team could ship 10× more with generative AI — and still trust every decision under a bank's load. Now I'd like to help other teams get there: real productivity gains from AI, without inheriting the failures that come with them.
If that's what you're working on — scaling your own development team with AI — reach me directly.
Talk to the founder → contact@navian.ai