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Alex Katlein

Principal Software Engineer

Works remotely from Wien

  • 48.2083
  • 16.3725
  • Suggested rate 1.000 € / day
  • Experience 7+ years
Propose a project The project will begin once you accept Alex's quote.

This freelancer will be available again on 1/8/2023

Until 1/8/2023

Propose a project The project will begin once you accept Alex's quote.

Location and workplace preferences

Wien, Österreich
Remote only
Primarily works remotely


Project length
≥ 6 months


Freelancer code of conduct signed
Read the Malt code of conduct

Verified email



  • English

    Native or bilingual

  • German

    Native or bilingual


Skills (33)

Alex in a few words

Years of experience engineering products for major banking institutions, multi-media companies, and e-commerce giants.

I help each of my team-mates achieve greater things in their own regard, and lead the team to success!

Delivering a great product with the least amount of issues is my passion, tell me what you want, give me what I need, and I will create something amazing for you!


ready2order GmbH

Digital & IT

Lead Architect

Vienna, Austria

August 2022 - Today (7 months)

Driving the technological transformation of the product to reach a bright and scalable future!

Closely working together with the CTO and other C-Level leadership on both operational and organizational topics to improve technological standards, organizational structures, and development processes.

Additionally fulfilling some hiring manager duties by helping design job offers, identifying organizational needs, conducting technical interviews, and being the single point-of-contact for the technical part of the application process.

FourEnergy GmbH

Digital & IT

Senior Software Engineering Consultant

Remote (Vienna, Austria)

January 2022 - June 2022 (5 months)


- Senior Software Engineer and Architect at Otto GmbH & Co KG (Hamburg)

OpenValue GmbH

Digital & IT

Senior Software Engineering Consultant

Vienna, Austria

January 2021 - December 2021 (11 months)

Engineering microservices for the cloud (AWS), connecting them via Kafka, and making sure they're secure.

All this while gathering experience leading and coaching a cross-functional team including motivated new-comers, experienced developers, and just top-notch coding machines!

- Team Lead, Lead Infrastructure Architect, and Security Specialist at Fiatwise Software AG (Vienna)

ByteSource Technology Consulting GmbH

Digital & IT

Senior Software Engineering Consultant

Vienna, Austria

January 2018 - December 2020 (2 years and 11 months)

Full-Stack application development for the JVM, Node.js, and browsers. Engineering microservices and designing infrastructure on AWS or on-premises. Customers from varied fields like banking and multi-media. Interacting with people from lots of different countries.

- Lead Engineer at Raiffeisen Bank International A.G. (Vienna)
- Senior Engineer and Architect at Joyn GmbH (Munich)

Shark GmbH, Business Consulting & IT-Solutions

Software Publishing

Software Engineer

Vienna, Austria

January 2015 - December 2017 (2 years and 11 months)

Transpiler development for PL/I, HLASM, etc. to Java, C#. Maintenance work and new development of in-house Full-Stack applications on the JVM. Some SysAdmin activities and on-premises infrastructure maintenance. First six months also included consulting work on-location at the customer's office.

- Software Engineer and Test Engineer at PVA (Vienna)

Österreichisches Bundesheer (Austrian Armed Forces)

Infantry Soldier

Vienna, Austria

July 2014 - December 2014 (5 months)

Honor Guard in the 3rd Guard Company

Shark GmbH, Business Consulting & IT-Solutions

Software Engineer

Vienna, Austria

March 2014 - July 2014 (4 months)

Optimization of arithmetic operations in runtime libraries for transpiled PL/I code