We tell clients that agentic development lets us ship roughly ten times faster than a conventional build. It's a large claim, and large claims usually deserve suspicion. So here is the mechanism, in plain terms — because the 10x is mechanical, not magic.
Where the time used to go
On a conventional build, a senior engineer spends most of the week on work that is necessary but not hard: boilerplate, CRUD endpoints, schema migrations, wiring, the test suite, the fortieth variation of a form. It is the bulk of the hours and almost none of the difficulty. The genuinely hard decisions — the data model, the security boundary, the failure modes — get whatever time is left over.
Where it goes now
Coding agents are very good at exactly the work that used to eat the week. Given a clear specification and a senior engineer reviewing every step, an agent writes the boilerplate, the migrations, and the tests in hours. The senior engineer's week now goes to the decisions that carry the risk. The ratio inverts.
The 10x isn't the agent typing quickly. It's a senior engineer no longer spending four days a week on work that was never hard.
Why the quality goes up, not down
This is the part people don't expect. Faster usually means sloppier. Here it is the opposite, for one reason: writing tests is no longer the bottleneck. When a thorough test suite costs an afternoon instead of a week, every change ships with one. Review works the same way — an agent can be told to check its own work against the specification, the edge cases, and the audit requirements before a person ever sees it.
We hold the bar higher than we did in 2022, not lower. For software that runs a regulated operation, that is the whole point. Speed that costs you reliability is not a saving.
What it doesn't change
Agentic development does not replace knowing what to build. The hard parts are still hard — the data model still has to be right, the security boundary still has to hold, and an agent pointed at a vague specification produces a great deal of confident, wrong code. The judgement is still the job. There is simply far more of the senior engineer's week available to spend on it.
That is the honest version of the 10x. Not a trick, and not a tool you bought — a change in where experienced people spend their hours. We build our own software this way, and we build yours the same way.