About team

David Lakatos

Experience

2024-now
CEO/Co-Founder/DevSecOps Engineer; sysagnostic

I assist our customers to reduce their license & operational costs by implementing & supporting free and open source cloud solutions.

AWS, OpenTofu, Java, Eclipse Temurin, Wildfly, AlmaLinux, Debian, OpenLDAP

2021-now
Senior IT Consultant; Great-IT

Solution architect and lead consultant of software development and DevOps projects. Mentoring junior colleagues. Certain projects require my business analyst skills to achieve customer satisfaction.

Java, Java EE, Linux, Oracle Weblogic, WLST, Oracle Service Bus, Python, Thales HSM, UML, JMeter, MySQL, OpenJDK, Kubernetes, PowerShell, Docker, Bash, Git, GitHub

2017-2021
IT Consultant; Great-IT

Customer-facing consultant, mentored junior engineers.

JMeter, Java, Oracle, MySQL, Kubernetes, Docker, Git, GitHub, SOAP, Java Enterprise Edition, Maven, Jenkins, WebLogic, POSIX, WLST, Oracle Fusion Middleware

2016
Software Engineer; Cloudera

Release engineer of the Cloudera Distributed Hadoop ecosystem. Our team assured good patch quality for the platform.

Java, Git, Jenkins

2015-2016
IT Technology Consultant; SAP

Cloud implementation engineer at SAP doing SuccessFactors component installation. My responsibilities included writing Chef cookbooks to standardize the process.

System Architecture, Git, Chef, POSIX, Suse, SUSE Linux Enterprise Server (SLES), OpenSuse, Linux

2012-2015
IT Consultant; Webvalto

JavaEE based Oracle Fusion Middleware solutions engineer and educator.

Java, Linux, Service-Oriented Architecture (SOA), System Architecture, Oracle, Databases, Java Enterprise Edition, WebLogic, POSIX, WLST, Oracle Fusion Middleware

2012
Software Developer Intern; Alerant

I worked at Alerant Ltd. during my MSc studies as a system integrator intern. The corporation utilizes Oracle products only (SOA, JavaEE) for integrating Hungarian TELCOs’ enormous IT systems.

Java, Service-Oriented Architecture (SOA), SOAP, Java Enterprise Edition, Maven, Jenkins, WebLogic

2009
Technical Support Associate; Aspectis

Provided support for video servers on CentOS, MySQL databases and various hardware components. Provided support for video servers on CentOS, MySQL databases and various hardware components.

CentOS, MySQL, Computer Hardware, Hardware Diagnostics

Languages

English
Full Professional Proficiency

Certificate in Advanced English, Cambridge University (Level C1, Type C)

Hungarian
Native

Certifications

2025
Enterprise OAuth 2.0 and OpenID Connect; Udemy
2024
AWS Certified Solutions Architect – Associate; Amazon Web Services Training and Certification
2022
LFCE: Linux Foundation Certified Engineer; The Linux Foundation
2021
CKS: Certified Kubernetes Security Specialist; The Linux Foundation
2021
CKA: Certified Kubernetes Administrator; The Linux Foundation
2019
CKAD: Certified Kubernetes Application Developer; The Linux Foundation

Certification ID: CKAD-1900-001845-0100

Education

2012-2014
MSc, Computer Science Engineer; Budapest University of Technology and Economics

fault tolerant engineering, verification of critical system

Supporting error propagation modeling with Java PathFinder

2008-2012
BSc, Computer Engineer; Budapest University of Technology and Economics

generic computer science bachelor course

Java EE based social network development


Author's posts

Migrating production Java applications to Eclipse Temurin

Migrating production Java applications to Eclipse Temurin

Free and open-source software not only reduces operational costs, but reduces strategic and legal liabilities as well. Oracle’s Hotspot JDK is the perfect example where liabilities exclusively originate from the vendor’s behavior and its product’s non-FOSS nature.

Read more
Cost-efficient disaster recovery strategy

Cost-efficient disaster recovery strategy

We tend to design business-critical systems to deal with extraordinary situations: natural disasters, human-induced incidents/accidents near data centers, or even acts of war targeting compute infrastructure. These occasions happen randomly from the designer’s perspective, so we need to have redundancies in place all the time to be able to deal with the fallout.

Read more
Just-in-time - Part 2

Just-in-time - Part 2

In Part 1 of this blog post series, we discovered how the Java platform relates to others in terms of compilation and execution, we compared compilation strategies, and identified hot code in Java bytecode. Let’s continue the journey by exploring Java’s JIT internals.

Read more
Just-in-time - Part 1

Just-in-time - Part 1

Great solutions are like essential civil engineering infrastructure elements: drinking water pipes, concrete foundations or electrical substations. If it works great, you can forget about its existence. The Java platform and its just-in-time (JIT) code compiler is very much like a civil engineering marvel. From time to time we forget about it and how important of a role it plays when it comes to Java software execution performance… until it breaks down.

Read more
AWS re:Invent 2024 re:Cap

AWS re:Invent 2024 re:Cap

Amazon once again introduced hundreds of new features for their public cloud platform, Amazon Web Services. Sysagnostic attended a re:Cap meetup, which is an event based on the original re:Invent 2024. The re:Cap was organized by SnapSoft, and took place in the SnapSoft headquarters. As our company focuses on cost-efficient solutions, this article hand-picks two topics related to cost efficiency that were mentioned during the 2024 re:Cap meetup or during the AWS re:Invent event.

Read more
How it's made: static website running on AWS

How it's made: static website running on AWS

We have to live with our decisions; no matter if they are good or bad. This post is a showcase of our company focus: cost-effectiveness. Let me show you how we designed our website infrastructure, explain the decisions we made, how they will hopefully benefit us in the long run.

Read more