HarnessersENFRTalk to a Human
Your codebase
Before · vibe-codedAudit & FixesAfter · Harnessed

Fast with AI.
Robust with Humans.

A collective of senior developers you can actually talk to. You tell us your needs, we analyse your codebase, fix what's fragile and build a custom AI harness around it. You keep shipping at AI speed.

Talk to a HumanWe don't charge tokens.
01 · The problem

Problems
we solve.

You built your project fast. Now you are alone with it.

Something broke.

You ask the AI to fix it, it tells you it's done, and something else breaks the next day.

It's bigger than you can hold.

Too many files, too many decisions, no one to check with. Every change feels like a gamble, and it's only you and a terminal that agreed to everything.

AI was supposed to save you time.

It moved fast. But you already had plenty on your plate before this project even started. Can you really keep this up?

02 · What we do

Services
we offer.

01AuditWe read every file, hand you a plain-language, prioritised report, then go through your needs and questions in a live session. Written by a person, for a person.€1,000Within a weekexcl. VAT
02FixesSecurity, architecture, maintainability. We offer fixes, by an engineer who knows your stack.QuotedAfter the audit
03Custom harnessA safety net built for your repo. Keep shipping at AI speed, without compromising the rest of your project.QuotedOnce it's sane
04Fractional engineeringWe ship changes ourselves, inside the harness. A senior you can call, without the full-time hire.Day rateMonthly
03 · The collective

We are
the harnessers.

Seasoned engineers, plus a broad network of professionals. Available for you, for real.

Portrait of Clément
Clément Bresson

ESSEC Business School alumni. Self-taught developer. 12 years as an engineer.

LinkedIn ↗
Portrait of Augustin
Augustin Riedinger

Télécom Paristech alumni. Supporting web craftspeople for over 12 years.

Portfolio ↗LinkedIn ↗
The network

A vast network drawn from leading business and engineering schools. Not in-house? We know who to call.

On demand
24+years of experience
4M+lines of code
100+codebases
04 · Taking calls

Talk to
a Human.

Tell us what you need. We'll come back with the answer that best fits your situation.

Or write to hello@harnessers.dev

har·ness/ˈhɑː.nəs/ · noun

1.A set of straps that holds something securely: a climber to the rope, a horse to the cart. So it can move without falling or getting hurt.

2.The checks, tests and guardrails around a codebase that let AI work with maximum efficiency over time.