Apps, shipped fast

We build web and mobile apps for early-stage startups

Work we take on

MVPs with a deadline

Investor demo in six weeks, launch in eight. We scope tight, ship working product each milestone, and don't disappear between meetings.

Rescue jobs

The last developer ghosted, the codebase is a mess, and something still needs to ship. We come in and tell you what's actually salvageable.

Real AI features

Not another chat box bolted onto a SaaS. Workflows, pipelines, and agents that do real work.

How it works

1
First call
Short, no deck, no pitch. We figure out whether this is a fit.
2
Written scope, fixed price
You get a clear milestone one with a fixed price before anyone writes code.
3
A product in two weeks
By Friday of week two, your MVP is live and you're clicking through it.

No multi-month discovery. No surprise invoices.

What we've built

B6 Cloud

Productivity platform. Notion-like editor, kanban board, policy management workflows. Acquired by Atlassian.

Denis, Founder

“Eternity Cat was our founding engineering team. Two years later, Atlassian's team went through the codebase during diligence and came back with a short list of nitpicks.”

Minimo

Marketing automation platform. Email builder, visual workflow editor, a dozen of integrations. Hundreds of active users daily.

Andrea, Founder

“Eternity Cat built the first version of Minimo. Three years in, they're still the team I call when we hit something our in-house developers can't solve quickly.”

Mileva

A government-facing platform for Serbia's licensed building managers. They file documents with the state, buy and renew licenses, and pay fees directly through the system.

Milosh, building manager

“Before Mileva, half my week was couriering documents between the ministry, the bank, and twelve buildings. Now I'm running more buildings with less admin.”

Mospromstroy

ERP for a construction company running multi-million-dollar projects. On-time delivery went up 25% after rollout.

Alexey, CTO

“We tracked a 25% lift in on-time delivery after the rollout. On projects this size, that's the difference between a quarter in the black and a quarter in the red.”