Human and machine — the best of both worlds
AI development with human accountability
forty² (our AI agent) develops around the clock, and experienced engineers stand behind the work. Faster, at a fixed price, without agency hourly rates — and you can always see what's happening.
First assessment within 24 hours. No strings attached.
Why forty²
Five reasons to choose us
Why clients have us build for them — instead of hiring traditional developers.
Verified fixes and features often shipped the same day — not in the next sprint. The agent works in parallel, around the clock.
A team that delivers reliably. No sick days, no onboarding, no bench costs — the same performance week after week.
A fixed price per feature or a clear monthly budget. Predictable and easy to plan — no nasty surprises.
Regular written reports and a direct chat with the team. You always know what's being worked on.
A human contact who is accountable — not an anonymous bot. Your code stays your code, NDA included.
From idea to result
How we work
Three steps from idea to a running result. No recruiting, no onboarding, no bench costs.
Tell us what you have in mind
In the chat right here on this page, by email or in a call. We ask the right questions and tell you honestly whether and how it can be done.
Plan, quote, go
You get a concrete plan with milestones and a clear fixed-price quote. Once you approve, implementation starts — often the same day.
Transparent through to handover
Regular reports, a direct chat with the team and real meetings with your human contact. Nothing is signed off until it runs.
The principle
Why hybrid?
We won't tell you AI replaces developers. It doesn't. But the combination of the two changes how fast and how transparently software gets built.
AI agent What the agent takes on
- Implements several tasks in parallel, around the clock
- Researches, tests, migrates, documents every step
- Writes regular progress reports
- Replies in the chat, even at night and on weekends
Human What the humans take on
- Prioritisation and alignment, together with you
- Collaboration with your existing developers
- Meetings, contract and accountability
- The head on the line: not an anonymous bot, one contact person
Behind forty² are Stefan Kreuter, an experienced software engineer and consultant with projects for corporations and startups across the DACH region, and Urs Merkel, managing director of soft.fact GmbH. The agent goes by the name forty². Together they are the team you hire.
Results
How we back this up
Real projects, anonymised. We're happy to name references in a direct conversation.
AI recruiting system
A system that finds, approaches and hands over candidates — for companies of any size. Ongoing development and operation across several production instances, verified fixes within hours, regular client reports.
Coaching platform with an AI core
An AI coach with real memory: it knows you from the first message and keeps the context across sessions. A guided onboarding with tappable answer cards gets you started, and it understands you better with every conversation.
Energy management system for commercial sites
An EMS for a battery-storage manufacturer: battery control, integration of sensors and meters, live dashboards and peak shaving — in production at real sites.
What we offer
What you can hire us for
Feature or bugfix
A clearly scoped feature for your existing system — or we find and fix the bug that's holding you back. Fixed price, defined outcome, fast delivery.
A brand-new project
From idea to launch: an MVP, an internal tool or a platform. Infrastructure and operations included.
Ongoing development
Your product keeps evolving continuously. A dedicated contact person, regular reports, a monthly budget with a fixed price per feature.
Good to know
Frequently asked questions
Does the AI replace your developers?
No. The agent speeds up implementation enormously, and our team of AI and our experts works together with your existing developers. Humans carry the responsibility. That combination is exactly the product.
How fast does it really start?
First assessment within 24 hours. After your go-ahead, implementation often starts the same day, because no recruiting and no team ramp-up are needed.
What about my code and my data?
Your code stays your code. On request we work directly in your repositories, and we sign an NDA. Your data is never used to train AI models.
Who assures quality?
We do. Automated tests and verified deployments back every change: sign-off happens on the running system, not on paper.
What does it cost?
Always a fixed price. We clarify the scope up front, then you get a quote per feature, bugfix or project. Alternatively we agree on a monthly budget within which features are delivered. Every feature has a fixed price, one to two iterations included. You pay for results, not for attendance.
How do we communicate during the project?
Direct chat with the team (including the agent itself), regular written reports, and video meetings with your human contact.
Tell us what you want to build.
The chat goes straight to us. You'll get an honest assessment within 24 hours.