I help companies design, migrate, and operate reliable cloud and on-premise infrastructure — with deep expertise in Linux, PostgreSQL, Oracle DB, and enterprise architecture.
I am Jaroslav Langpaul, an independent IT consultant and cloud architect based in the Czech Republic. I specialise in designing scalable enterprise architectures, cloud migrations, and database optimisation for mid-size and large organisations.
With a passion for open-source technologies and a pragmatic, vendor-neutral approach, I deliver solutions that are robust, cost-efficient, and built to last. My core stack includes Linux (RHEL/Debian/Ubuntu), PostgreSQL, Oracle DB, and major public cloud platforms.
From initial architecture design to hands-on implementation and long-term support — I cover the full lifecycle of enterprise IT.
Design and implementation of cloud-native and hybrid architectures on AWS, Azure, and GCP. Includes HA, DR planning, and cost optimisation.
In-depth Linux system administration, hardening, automation, and performance tuning for RHEL, Debian, and Ubuntu environments.
PostgreSQL and Oracle DBA services — schema design, query optimisation, high availability, backup strategies, and migrations between platforms.
TOGAF-aligned EA consulting: business capability mapping, IT strategy alignment, and technology roadmap creation for large organisations.
End-to-end migration of legacy workloads to the cloud — assessment, planning, lift-and-shift or re-architecting, and post-migration optimisation.
Infrastructure security audits, hardening guides, ISO 27001 and GDPR alignment, and implementation of zero-trust network principles.
A selection of the technologies I work with day-to-day on client projects.
What my clients say about working with me.
Practical articles on cloud architecture, Linux, and databases — replace these with links to your real posts.
A practical guide to PgBouncer, connection pooling strategies, and kernel parameter tuning.
A vendor-neutral comparison covering cost, compliance, and operational maturity for Central European organisations.
SELinux, auditd, firewalld, and CIS benchmark alignment — everything you need before going live.
Have a project in mind or need an expert second opinion on your architecture? I'm available for consulting engagements, workshops, and long-term partnerships.