Architecture under real constraints
When regulation, existing platforms, and production operations must be considered at the same time.
Engineering Studio · Frankfurt am Main
Software architecture.
Lead engineering.
Technical ownership for complex software projects — from architecture through implementation, together with existing teams.
// complexity
Where Entwicklerherz creates the most leverage.
In initiatives that combine technical depth, clear decisions, and production delivery.
Modernization without dogma
When an evolved system must change without reflexively rebuilding what already works.
The critical technical path
When the reliable core for further delivery is missing — with or without AI.
// from decision to production
How Entwicklerherz contributes.
Three forms of clearly bounded technical ownership.
System and architecture clarification
Clarify options, risks, and system boundaries until a sound decision can be made.
Critical Systems Engineering
Build the technical core that the existing team can safely continue from.
Technical leadership
Guide critical decisions and make technical risks visible early.
// assert
Great software is built where regulation, real users and production load collide — not in a lab. Not in a workshop. Not in a slide deck.
Architecture is a decision, not a diagram.
Most systems don’t fail because of technology — they fail because of architecture decisions made too late or too vaguely. Cut early, scale later.
Legacy is not a dirty word.
Systems that have been running for years have proven they deliver value. The art is to evolve them — not to throw them away.
Code is evidence, not activity.
Concepts only count when they can be implemented. We build the decisive parts ourselves and test decisions against working software.
More output does not replace understanding.
AI accelerates development. The faster software is produced, the more important judgment, system understanding, and clear ownership become.
Projects
Experience from real systems
DZ BankKBM
Lead developer and software architecture
Architecture and full-stack engineering for core components of a digital advisor and customer portal.
AngularKafkaOpenShiftGraphQL
Event-driven · CQRS · Real-time portfolio reconciliation
Deutsche PostRentenservice
Software architecture and backend engineering
Event and integration architecture for 2.3 million cases per week.
Spring BootKafkaKubernetes
2.3M cases/week · CDC Streams · Zero-downtime deploys
Working model
Understand. Decide. Build.
Entwicklerherz connects system understanding, architecture, and implementation. Technical responsibility follows the critical path into production.
Journal
Thinking from practice
June 202612 min
Responsibility doesn't scale
Output can be parallelized, understanding can't. Why organizations are quietly converting responsibility into risk right now — and why it only surfaces when something breaks.
June 202611 min
Your profile isn't yours. Not yet.
When execution proves nothing anymore, how does anyone still recognize you? On professional identity you've rented — and the one decision that's left to you.
March 202612 min
Reviewing AI Code Is a Different Job.
AI code looks clean. But whether it fits the system can't be seen in the diff — only when you know what to check against.
Studio
How this becomes collaboration
Entwicklerherz works deliberately small and senior. Architecture and implementation stay under one responsibility. For larger initiatives, we work directly with existing teams and selected specialists.
Code firstDecisions are tested against working software.
AI as a toolAI amplifies the work. Judgment and responsibility remain human.
Own itYou build it, you run it. No handover doc has ever resolved an incident.
Proven in our own products
Own Product
D³ — Decision-Driven Delivery
An open framework that governs software through decisions instead of tasks.
Open FrameworkDecision Mapmigratable from Scrum
Five modes · decisions over tickets · openly documented
To the frameworkOwn Product
openworkid
An open standard, reference platform, and MCP server for portable professional identity.
JSON-LDMCPSSRSchema.orgMagic-Link
Open standard · portable by design · MCP from day one
Read the case studyFacing a technical decision with consequences beyond the next ticket?
Tell us about the system, the constraint, and the decision that needs clarity. An initial conversation will show whether Entwicklerherz can make a meaningful contribution.
Send a project inquiry