Jacek Weiss
IT Analyst at Tata Consultancy Services
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolJacek Weiss is an experienced IT analyst and infrastructure engineer with 12+ years operating Windows Server, Citrix, VMware, MS Clusters and SQL environments for international customers following ITIL practices. Based in Hamburg, he combines deep hands-on support (2nd/3rd line) and change management with design and documentation skills gained across large clients like NXP and multiple Atos engagements. He also writes software—contributing backend improvements to the widely used Vert.x project (notably TLS/SNI trust-management enhancements) and device bindings for openHAB—bridging systems administration and application-level engineering. Comfortable across scripting and languages (Java, Python, Swift, Rust-in-progress, Bash), he often implements practical fixes that reduce operational friction. Colleagues rely on him for clear runbooks, incident root-cause work, and coordinating cross-regional transitions. His blend of production stability focus and open-source contributions makes him valuable where reliability and secure connectivity matter.
13 years of coding experience
11 years of employment as a software developer
Master of Science, Automation and Computer Science, Master of Science, Automation and Computer Science at II Liceum Ogólnokształcące
English, Russian, Polish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (16)
javas10
mtls10
tls1210
vertx10
reactive10
tls1310
java10
libtls10
jvm9
netty9
openhab8
embedded8
concurrency8
sys8
apidoc7
Programming languages (7)
Github contributions (5)
openhab/openhab1-addons
Aug 2013 - Feb 2017
Add-ons for openHAB 1.x
Role in this project:
Back-end Developer
Back-end DeveloperContributions:252 commits, 47 PRs, 16 pushes in 3 years 6 months
Contributions summary:Jacek made significant contributions to the Tinkerforge binding, primarily focused on adding support for new devices and refining existing functionalities. They implemented support for the BrickletIndustrialQuadRelay, the OLED and LED strip Bricklets, the Bricklet Hall Effect, and the Bricklet Dual Button. The user was also responsible for a number of bug fixes and implemented a revised approach to handle switch and dimmer controls for the devices.
openhab
eclipse-vertx/vert.x
Sep 2017 - Oct 2017
Vert.x is a tool-kit for building reactive applications on the JVM
Role in this project:Back-end Developer
Back-end DeveloperContributions:7 commits, 3 PRs, 27 comments in 17 days
Contributions summary:Jacek primarily contributed to improving the TLS (Transport Layer Security) and SNI (Server Name Indication) support within the Vert.x framework. They added new functionalities to manage trust options with SNI, including supporting custom trust manager mappers. Their work involved creating test cases to validate the SNI implementation and related trust store configurations, which enhance the security and flexibility of Vert.x applications. Additionally, the user modified and refactored the existing codebase to provide more control over trust management.
jvmvertxjavanettyreactive
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