# IT strategy & due diligence Target pictures, technology decisions and technical due diligence – including for private equity investors and their portfolio companies. ## Technologies and methods - **Architecture & methods:** Microservices, Event-driven architecture, Multi-tenancy, Domain-driven design, Hexagonal architecture, Saga & outbox, Idempotency & resilience, Feature flags, Monorepos, Web crawling & scraping, Constraint optimisation (OR-Tools), arc42 & C4, Mermaid, Scrum, ITIL - **Law & compliance:** GDPR/BDSG, Schrems II, DDG, TDDDG, UWG, BFSG (accessibility), DORA, ISO 27001, EU AI Act, Audit logging ## Industries - Private equity: Technical due diligence and modernising and scaling the IT of portfolio companies. ## Four phases with clear deliverables - Phase 1: Analysis. System landscape, dependencies and regulatory frame as a solid baseline. - Phase 2: Design. Target picture, architecture and delivery plan with milestones, risks and compliance controls. - Phase 3: Delivery. Iterative, automated and measurable – together with your teams. - Phase 4: Handover. Stable operations, complete documentation and enabled teams. All twelve services are listed in the [services](https://www.klein.business/en/services/) overview; a short [request](https://www.klein.business/en/contact/) is enough for a first conversation. ## Frequently asked questions ### How does a collaboration start? With a short [request](https://www.klein.business/en/contact/). We reply within two working days with a proposal for a no-obligation first conversation. Last updated: 2026-11-11 --- Source: