01
Domain logic & workflows
Your business logic, cleanly translated into software.
Custom rules, calculations and workflows that map complex processes reliably and stay easy to evolve.
We buildSaaS & platforms
We develop, extend and stabilise complex products -senior-ledand withownershipinstead of billable hours.
app.devbld.comlive
Revenue+12%
€0k
Users+3%
0.0k
Conversion+0.6%
0.0%
Revenue trend
0108152230
AuthPayAPI
$✓
Proven under real-world demands
B2B SaaSComplex product logicHigh-traffic platforms
live0+daily visitorsOn an international platform
0+ yearsLong-term technical partner
0+Complex integrations shipped
Trusted by product teams & founders
- LohnLab
- 10FastFingers
- beglaubigt.de
- Mental Royale
- Lohnkonzepte
- Spixler
AI accelerates development. Experience decides what works long-term. DEVBLD. builds complex SaaS and platform products that can keep evolving long-term and are designed with technical rigor.
Services
Make the rightnext move.
Clarify what matters. Build what lasts. Scale with confidence.
Path 1 · Product Clarity
Clarity before code.
For ideas, features and AI-built prototypes that need a clear path forward. We turn assumptions into a prioritised scope, technical direction and realistic next step.
Best for: Validated ideas, major features or AI-built prototypes with unclear scope, feasibility or effort.
Typical outcomes
- prioritised MVP or feature scope
- technical assessment of what exists
- architecture and stack recommendation
- risks, gaps and open questions
- rough effort estimate
- recommendation for a build sprint or retainer
Timeline
1-2 weeks
Format
Workshop + written recommendation
What we build
What turns aprototype intoa product.
From domain logic to real time: we build the systems that carry your SaaS long-term - designed around real users and real business processes.
02
Roles, permissions & tenants
Secure access that matches your structures exactly.
Granular permissions and tenant separation for customers, teams and organisations - even with sensitive data.
03
Billing & subscriptions
Billing that fits your business model.
Subscriptions, usage-based plans, payment flows and invoices - flexible from your first customer to scale.
04
APIs & integrations
Your systems, reliably connected.
Robust interfaces and data flows to DATEV, CRM, payment, analytics and custom third-party systems.
05
Documents & signatures
Documents your product creates itself.
Dynamic PDFs, templates, approvals and digital signatures - automated from your product data.
06
Performance & real time
Your platform stays fast as usage grows.
Performance optimisation, live data and real-time communication for high load and demanding interactions.
Our stack
- Next.js
- React
- TypeScript
- Node.js
- PostgreSQL
- Supabase
- Stripe
- Vercel
✦How we work
Fast where it helps.Deliberate where it matters.
We combine product clarity, thoughtful architecture, senior-led delivery and continuous improvement - so speed today does not become friction tomorrow.
01Clarify
Start with the decisions that matter.
We align on users, outcomes, scope and risks - so everyone knows what to build, what not to build and what success looks like.
02Architect
Design the foundation before complexity grows.
We translate product goals and business logic into architecture, data models and workflows built for the current release - and what comes next.
03Build & launch
Ship production-ready software.
Senior engineers build in small, testable increments - with security, deployment and observability included from the start.
04Evolve
Improve with real-world evidence.
After launch we use product data, user feedback and operational signals to prioritise what comes next and keep the system reliable.
30 min · no commitment · directly with a senior engineer
Selected work
Connected
Worldwide
Cologne10FastFingers
01 / 02
“My go-to partner for MVP development. 100% recommended!”
Christian
10FastFingersThe team delivers fast, thinks along and turns ideas into market-ready products in an astonishingly short time.
The studio
Senior expertise.Clear ownership.
Direct collaboration, consistent standards and clear responsibility - from the first decision to continuous development.
Nils
Founder · Product & Engineering Lead
Turns product goals into architecture, business logic and production-ready software - and owns the technical decisions from first scope to launch.
ProductArchitectureFull-stack
Lena
Founder · Operations Manager
Keeps priorities, communication and delivery aligned - so projects move forward with clarity, consistency and minimal coordination overhead.
DeliveryPlanningClient operations
Anton
Full-Stack Engineer
Ships features from the data model to the interface - tested, documented and built so the next developer can pick them up without a handover call.
Full-stackIntegrationsCode quality
Pascal
Frontend Developer
Builds interfaces that feel fast and hold up on every device - from the design handoff through motion, accessibility and the last five percent of polish.
InterfacesMotionAccessibility
Product Growth Partner
Retainer packages
Fixed monthly product capacity for existing SaaS and platform products - with clear prioritisation and direct technical leadership.
Monthly
Starter
from €4,500per month
Entry
Reliable product capacity for ongoing development and stabilisation.
Included
- ✓fixed monthly capacity
- ✓clear prioritisation
- ✓ongoing feature development
- ✓bug fixes & stabilisation
- ✓monthly review
Monthlypopular
Growth
from €8,500per month
Best pace
More pace and direct technical leadership for products with steady growth.
Included
- ✓everything in Starter
- ✓expanded capacity
- ✓direct technical leadership
- ✓performance optimisation
- ✓API integrations
- ✓technical roadmap
Monthly
Scale
customper month
Enterprise
Dedicated capacity for products with high frequency and multiple workstreams.
Included
- ✓everything in Growth
- ✓dedicated team setup
- ✓multiple workstreams
- ✓refactoring & scaling
- ✓prioritised support
First step
Production-Readiness-Check
€1,200one-off · 2 days
Your product runs - the question is whether it holds. In two days we review the places where prototypes break under real load and tell you in writing what has to happen before the next growth step.
Start a retainer within 60 days and the full €1,200 is credited against month one. All prices net.
Book the check$ devbld check --production
- data model & domain logic
- tenancy & permissions
- authentication & sessions
- security & dependencies
- reliability & operations
- written short report
- risk register with severity and effort
- recommendation: extend or rebuild
- 45-minute readout call
$git log --graph
mainnext: your-product
Ready to build your product?
Tell us briefly about your idea - we'll turn it into a clean, scaling product.