01qualified
The right fit
- Complex, proprietary business logic
- GDPR-sensitive industries, MedTech, healthcare, ESG, or ERP contexts
- Legacy systems needing senior modernization
- Founders who need a peer-level senior technical partner
Senior-led Custom Software DevelopmentBerlin · DACH / EU
We build B2B web apps, mobile apps, ERP workflows, and legacy modernization projects. We translate proprietary business logic into secure, scalable systems with GDPR-sensitive architecture and zero agency bloat.
One senior lead engineer owns architecture, technical decisions, and production-ready code. Project coordination is added according to scope when stakeholders, compliance, or delivery model need additional control.
8+ yrs seniorGDPR-sensitiveDACH · DE / CH / ATDE · EN · ES
10+Production projects
Web · Mobile · BackendCustom software delivery
Business logic -> clean codeRequirements translated precisely
DACH / EUDelivery and collaboration
What we do
From architecture audit to production-ready custom software.
Senior-led software engineering for B2B web apps, mobile apps, backend systems, legacy modernization, and GDPR-sensitive operating models. Every service reduces technical risk, creates decision clarity, and moves toward reliable delivery.
Budget orientation, not a price list: effort depends on domain logic, integrations, data model complexity, number of platforms, compliance constraints, and operational responsibility. Discovery and audits typically start from €6k; production-grade custom development usually starts from €20k after technical scoping. A binding fixed price only makes sense after scope, risk, and acceptance criteria are clear.
Build
Enterprise Web Applications & Platforms
We build workflow-heavy enterprise platforms around existing processes, databases, and approvals. For portals, internal operations systems, dashboards, and regulated B2B workflows that must stay auditable and maintainable.
Build
High-Performance Mobile Apps (iOS & Android)
We build mobile apps for field service, healthcare, regulated workflows, and productive B2B usage. Not just app UI, but the mobile operating layer: offline data, backend integration, device features, store release, and lifecycle maintenance for iOS and Android.
Build
Backend & API Development
We build backend and API architecture for systems where business logic, data integrity, and stable contracts matter more than framework speed. Clearly separated, tested, and documented for internal continuation.
Scale
GDPR-Compliant Cloud Infrastructure
We make existing applications safer to deploy and operate: clear environments, controlled access, documented data residency, backup/restore paths, and a handover your team can maintain.
Build
GDPR-Compliant Software Development
We build GDPR-sensitive software for B2B, healthcare, platform, and internal workflow systems. Privacy is planned as a system requirement: data flows, roles, auditability, deletion paths, hosting decisions, and technical handover.
Observability
CI/CD Observability for Build, Test & Deploy
We make pipeline problems queryable: builds, tests, deployments, runners, commits, and logs become a diagnostic model that helps engineering teams find regressions, flaky tests, and slow jobs faster.
Custom software references
Custom software systems that improve real business operations.
Selected production systems across B2B web app development, mobile app development, ERP workflows, healthcare software, sustainability reporting, and legacy modernization. Each case shows our senior engineering contribution: architecture, implementation, migration, modernization, or technical responsibility.
Detailed architecture notes and technical deep dives are available where disclosure permits.
Proof cases for custom software:
CCF · PCF · 3602024 - Present
Sustainability · ESG / CSRD1
ESG Custom Software — CCF, PCF and 360-Degree Audits
SystemMulti-tenant web app for sustainability reporting
Impact metric
CCF · PCF · 360-degree audits
Before
Audit, product, and company-footprint data was distributed, hard to govern, and difficult to reproduce.
After
A central Angular/Firebase platform documents client, audit, and footprint data with access control, emissions factors, and reporting dashboards.
ERP · 3D Scan2019 – 2024
MedTech · Global Orthopedics2
Medical ERP Software — Orthopedic Catalog and 3D Scan Orders
SystemMedical ERP for orthopedic products and custom orders
Impact metric
Scan-to-order workflow
Before
Product orders, patient data, dimension sheets, files, and order status were difficult to connect operationally.
After
A central .NET/Angular platform connects catalog, 3D scan upload, patient records, dimension-sheet data, status management, and exports.
Offline PWA2022 – Present
Renewable Energy3
Field Service PWA — Offline Appointments, Tasks and PDF Protocols
SystemProgressive Web App for field service, solar installation and scheduling
Impact metric
offline field sync
Before
Appointments, tasks, photos, notes, and acceptance protocols were difficult to coordinate with unstable field connectivity and the existing SQL database.
After
An Angular/.NET PWA connects user login, roles, teams, offline entries, auto-sync, sync indicators, and signed acceptance protocols with the extended SQL database.
Strategic Fit
Senior-led software engineering for complex, business-critical systems.
For companies that do not need agency resources, but senior-led architecture, GDPR-sensitive delivery, and defensible technical decisions.
02not a fit
Not the right fit
- Very small MVPs or delivery scopes under €20k
- Generic landing pages or simple CMS sites
- Projects where the lowest day rate matters more than technical responsibility
- Teams mainly looking for short-term implementation without architecture clarification
Risk-controlled delivery
How uncertain domain logic becomes reliable software.
Every phase reduces uncertainty: understand first, decide second, build third. You get clear control points, visible progress, and a complete handover.
01
Architecture Workshop & Logic Mapping
We analyse domain logic, data flows, compliance constraints, and integrations directly with decision makers.
Output
Technical roadmap, risk matrix, and prioritised scope
No templates — only project-specific architecture decisions.
02
Foundation & Decision Architecture
The Lead Architect defines system boundaries, data model, security model, and technical guardrails.
Output
Architecture blueprint, backlog, and reliable project plan
GDPR, maintainability, and scalability are clarified before build.
03
Senior Build & Transparent Sprints
Implementation in focused iterations with sprint demos, technical decisions, and direct access to the senior engineer responsible for the system.
Output
Production-ready features, tests, and traceable decisions
No account-manager filter, no junior handoffs.
04
Code Handover & Operational Readiness
We hand over code, documentation, credentials, deployment paths, and open technical decisions.
Output
Full IP transfer, technical documentation, and operating setup
No vendor lock-in — your team can keep moving.
Team & delivery model
Senior engineering at the core. Project coordination by scope.
Kodeline is built around two specialised roles: senior engineering and project coordination. Depending on scope, you work directly with the lead engineer or with additional project-management support. No account-manager layer, no quiet handoff to junior teams.
Lead Software Architect & Senior Developer
Andres Garzon
B.Sc. Informatik (TU Berlin) · 8+ years senior production engineering
Owns the technical substance of each engineering engagement: architecture decisions, production code, and the translation of complex domain logic into maintainable systems.
Role in delivery
- Software architecture and technical decisions
- Production code across web platforms, backend systems, and mobile apps
- Code quality, maintainability, and technical risk
Project Coordination & IT Project Management
Alexander Korres
IT-System-Management Specialist · 4+ years enterprise project coordination
Supports engagements where scope, stakeholder communication, budget clarity, or compliance coordination need additional control.
Role in delivery
- Scope, roadmap, and stakeholder communication by project model
- Project structure, budget clarity, and decision rhythm
- GDPR coordination and transparent delivery for more complex setups
“Production code stays with the senior engineer. Project coordination is added where scope, stakeholders, or compliance need additional control.”
Buyer questions
Questions serious buyers ask before technical commitment.
Most software risk appears before the first line of code is written: ownership, compliance, budget clarity, handover, and maintenance. These are the questions serious buyers usually ask first.
How do you ensure GDPR compliance in software projects?
Compliance is designed into the architecture from the start: EU data residency, privacy-by-design flows, encryption, audit logs, and deletion concepts. We treat GDPR as a system requirement, not a post-launch patch.
What budget is realistic for a senior-led custom software project?
As budget orientation: discovery and technical audits usually start at €6k. Senior-led custom engineering usually starts around €20k after scoping and scales with system complexity, integrations, compliance, and delivery scope. A reliable fixed price is only possible once scope, assumptions, risks, and acceptance criteria are clear.
Can you take over an existing codebase or legacy system?
Yes. We regularly take over unstable or aging systems, audit the current architecture, identify critical paths, and define a modernization sequence that reduces production risk instead of increasing it.
Who owns the source code, credentials, and infrastructure?
You do. We deliver code, deployment paths, documentation, and credentials so the system remains transferable. The goal is ownership clarity, not vendor dependency.
Do you only work directly with end clients?
No. We work across direct, agency, and partner engagements. What matters is clear architecture ownership, scope control, and technical quality.
Next step
Ready to architect custom software?
Start with a focused fit call: scope, constraints, budget corridor, risk, and decision path. Architecture analysis is handled in a paid discovery or audit phase before a binding fixed price makes sense.
Start your project
Tell us about your business logic.
We respond within one working day. The first call qualifies scope, constraints, budget corridor, risk, and fit. Architecture decisions are handled in a paid discovery or audit phase; fixed pricing follows only after reliable scope clarification.