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Coding with Holger

Coding with Holger

By Holger Steinhauer
A podcast about all things coding, freelancing and all the stuff going on
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Communities with Olimpiu Pop & Nicola Corti
It's episode 20, everyone! And such a round number calls for a special topic! Guess what, we found one: Communities This episode also is a first guest wise as we have two guests: Olimpiu Pop and Nicola Corti. Our guests and Holger speak about their journeys, learnings and advice about founding, organizing and running communities. All three have their fair share of experiences as they are involved in several Meetup groups and other communities like Java Advent. This episode is full of references. Here are the promised links: Java Advent - Java Users Group Transylvania FOSDEM Kotlin DevRoom 2022 Google Developers Group (GDG) Pisa Virtual Kotlin User Group Kotlin User Group (KUG) Berlin Gopher Advent Linux Day (Linux Tag) Java Pub House Podcast Last, but definitely not least, if you want to get in touch with Nicola, check out his GitHub profile, Twitter profile, his Podcast "The Developer's Bakery" and his blog And Olimpiu is on the interwebs as well. Here are his LinkedIn profile, his Twitter profile and here is his InfoQ profile
March 29, 2022
Java with Martijn Verburg
Guess what, I finally got to have a chat about Java! The amazing Martijn Verburg came on stage, and we spoke about All Thing Java. So tune in to learn about the Java Ecosystem and terms like TCK, JVM, JDK and many, many more terms. Here are the links we promised during the episode: Quarkus, RedHats "twist" on the Eclipse Micro Profile Eclipse MicroProfile, the new player on the Java EE block Project Loom Project Valhalla Project Panama Wanna get in touch with Martijn? You can find him on Twitter as @karianna and on GitHub, as well as @karianna
January 29, 2022
Go with Bill Kennedy
Welcome to this fantastic episode about the Go language. Bill Kennedy joins me this time, and we have a great chat about the history of Go, why he loves the language so much, how community works, the cloud... Too many things to put in here. So check it out. Buffalo is one of the web frameworks Bill mentions. The other one is Beego Bill's Twitter handle is @goinggodotnet. For the Golang Slack invite, head over to and his email is
December 29, 2021
Ruby with Manuel Meurer
You are in for a treat. I got Manuel Meurer from Uplink to speak about his journey with Ruby and Ruby on Rails. And we had a fantastic conversation with a great look into the good and the not-soo-good-for-Ruby sides of things. Curious and want to get in touch with Manuel? No worries, check out his website or join us on Uplink via and ping him on Slack
November 29, 2021
Android Development with Márton Braun
After the Kotlin episode, what could better fit than one about Android development?! I invited Márton Braun for this occasion, and we had a great chat about all things Android development. Want to get in touch with Márton? Check out his website or find him on Twitter with his handle zsmb13 Wanna get on the Kotlinlang slack? Get your invite here
October 30, 2021
Kotlin with Marcin Moskala
Finally. This is an episode I was really looking forward to. It is all about Kotlin. The incredible Marcin Moskala joins me to speak about my current programming language of choice. Marcin is a passionate software developer and entrepreneur. His training platform KtAcademy provides a variety of different courses. He is also the author of books like Effective Kotlin from which he publishes parts for free on KtAcademy and Twitter. Alongside our chat about Kotlin we also dive into the topic of technology hypes or "waves" as Marcin puts it. As always, here are the promised links: The TIOBE Index Kt Academy Workshops Kotlin Coroutines Book JavaScript Od Podstaw (Polish) book
August 29, 2021
Product Management with Samir Mathew
Did you ever wonder what a Product Manager does? Well, wait no more. Samir Mathew is here to help us out Samir and I talk about what Product Management is, what a product manager does and that there are so many ways of getting into "product". As always, here is a list of links to topics we mentioned in the interview or promised to link here... Product Owner Wikipedia paragraph Product Manager vs. Product Owner Blog post "Product Owner vs Product Manager: Who is the Boss?" Minimal Viable Product (MVP) Wikipedia on Minimal Viable Product Product requirements document (PRD) Wikipedia on PRD PSD2 Wikipedia on PSD2 Requirements Engineering (RE) Wikipedia on RE Product Design Wikipedia on Product Design Want to get in touch with Samir? Head over to Samir's LinkedIn profile
June 29, 2021
The .net Platform with Florian Gamper
Florian Gamper is back! And he came back to talk about a platform I never really found my connection to. But Florian loves everything Microsoft and especially the .net platform. So join us on this first episode about the various (web) development platforms. We explore how Florian approaches and builds projects with a high focus on the business challenge at hand. Here are links we mention during the episode: IIS - Internet Information Services Wikipedia entry about Microsoft's IIS API - Application Programmable Interface Wikipedia article A nice, comprehensive video on what APIs are GraphQL Wikipedia article about GraphQL The "official" website for GraphQL WASM - WebAssembly Wikipedia article about WebAssembly Mozilla's documentation Getting started with .net core Microsoft's main .net landing page The "Get Started" guide by Microsoft Visual Studio landing page As always, if you like what you hear, give us a good rating on your podcast platform of choice and tell your friends about us. Feedback is always welcome - send us an email to or contact us on Twitter or LinkedIn
May 30, 2021
Editors & IDEs with Trisha Gee
Welcome back to Coding with Holger! What are IDEs? What are editors? What's the difference? And what the heck is a Developer Advocate? These and much more questions around the topics editors and IDEs are answered in this episode. And who would be better to speak about this other than the amazing Trisha Gee?! Wanna get in touch with Trisha? Head over to her Twitter account and her website.
April 28, 2021
ARM and other CPUs with Gordon Bobic
Gordon Bobic is back! This time we speak about ARM, what it is, why it is different to what we usually find in our hardware and much more. Here are some links to the things we mentioned on the show:   iPod Flea - Apple Ad Parody   Macbook Air Ad Parody   Linus Torvalds and large memory pages   Redsleeve Linux Enjoy the episode. We are happy to get your feedback! Mail it to or get in touch on Twitter or LinkedIn.
March 29, 2021
CTO with Florian Gamper
Florian Gamper joins me and we talk about the life and challenges of a Chief Technology Officer. During the episode, Florian mentions the annual pay survey from Golem. Here is the link to one: He also mentions the Blazor framework. If you want to read more, start here: If you wanna get in touch with Florian, check out his LinkedIn Profile
February 28, 2021
Open Source Development With Johannes Tigges
Happy new year! We are finally back. Thank you for bearing with us and be prepared for more episodes coming up this year. This time Johannes Tigges joined me, back in July 2020, to talk about Open Source, Open Source Software and more Open Source $things. Johannes and I had some "German moments", meaning we used some German terms and couldn't come up with a proper translation. So, if you are really interested, here is an post-said-translation-attempt: Laufakte (aka Handakte) "Reference File" Aktenlage "state on record" (there does not seem to be an official translation) Zulieferer Supplier As always, here are the promised and useful links from/for the episode: Heinz Nixdorf Museum RFC 1925 - "There is always something" OpenSSL Heartbleed AutoSpotting >a href=""> InnerSource Commons Creative Commons Creative Commons - CC by SA Read The Docs Gnu Public License (GPL) Blackduck Clearly Defined Open Source Software (OSS) Review Toolkit CDDL
January 29, 2021
Quality Assurance (QA) with Afua Apraku
We are so happy that we got Afua Apraku on the line to talk about QA, testing and how to work as a team. This episode will give you a lot of insides on what QA actually is, how testing fits into it, what kind of testing and environments we usually deal with in projects and how we as a team do successful projects. Want to get in touch with Afua? No problem head over to her LinkedIn profile
June 29, 2020
Relational Databases with Gordan Bobic
Join me and the fabulous Gordan Bobic when we explore relational databases, the role of a DBA and experience me learning the great term "PHP hammer". Gordan runs Shattered Silicon and has more than 20 years of experience in the field of programming, operating systems and databases in particular. As we touch on many topics, here are the promised pointers and some points to start your follow up research on: What is SQL: And what is a RDBMS: DDL and DML:, What are joins: What are database indexes: Cartesian product: When your security becomes a ladder 😈: ENUM: What is an ORM: Wanna get in touch with Gordan? The easiest way is to ping him on LinkedIn If you want to get in touch with us, hit us at
May 29, 2020
UI/UX with Milena Lolli
What is the difference between UI and UX? Should you have one designer doing both or one each? What is UI, and what is UX anyway? These are just a few questions I discussed with the incredible Milena Lolli. To get in touch with Milena, head over to her LinkedIn profile or check out her Twitter feed. Into games? Then her Twitch channel is just for you! Last but not least: Sorry for the keyboard and mouse clicks. Milena's boyfriend was working hard during the interview, and we realised too late that the microphone catches that. I promise to improve on that!
April 29, 2020
Be Your Boss with Wasilij Korotchenko
Wasilij Korotchenko from Hero Consulting joins me this time to talk about what it means to be a freelancer and that having a company is more demanding than we might have thought so far. Join us on a discussion around who might be better cut out to be a freelancer and who might even think of starting a company. Here is the sweet little search hack, Wasilij mentions while we were discussing the topic of finding clients: "Kotlin" AND ("Manager" OR "CTO" OR "Head of IT" OR "Engineering Lead") Do you want to get in touch with Wasilij? Connect with him on LinkedIn: and his company's website is Wasilij's projects: Honest Recruiter Podcast Bosh Gamer Wasilij is currently sorting the distribution and links, keep an eye on his LinkedIn profile and I'll send them out on our social media accounts :)
March 29, 2020
Data Science with Andreas Bollig
This time Dr Andreas Bollig joins me and we talk about all things Data Science. If you want to get in touch with Andreas, check out his LinkedIn profile: and his new website Interested in the mentioned Python podcasts? Check them out here: Heard about the (probably) XKCD comic? Turns out, it wasn't XKCD (but there is always a high chance it is). BUT, being a data scientist, Andreas found it anyways. Here you go Then we spoke about the pitfalls hidden in data, for example with names. Here is a good article looking at it: Want to dig deeper and look into the mentioned sources? Here are the links: (We mentioned Safari Books in the episode and this is called "O'Reilly Online Learning" now) (HackerNews) (My guilty pleasure, hoarding MEAPs) (The testing framework Andreas mentioned) Little errata: The first iPhone was released in 2007 and not in 2009. We got this wrong somehow, sorry. 
March 15, 2020
Full-Stack Development with James Mahy
In episode 3, we dive into full-stack development and what it means to be a full-stack developer. Joining me, in the first interview episode ever on this podcast, is James Mahy. He is doing full-stack development for a long time now, and we talk about how he got there and what benefits it has to understand everything from infrastructure, over backend technologies up to frontend tech. We also talk about his great work on SoSa and why he is building it If you are interested in James' code, have a look at his SoSa GitHub Organisation. And the best way to reach out to him is via LinkedIn Last but definitely not least, a massive shout out to Bradley Parsons. He created the music for my podcast. If you want to learn more about him or want to hire him, have a look at his website: Errata When James and I discuss the "good old times" with the C64 I use the word Quellcode twice. Sorry for that. This is how we Germans say "source code".
January 29, 2020
From Backends and Frontends
We talk a lot about frontends and backends, but what are these things actually? Using the example of an online food order service, I try to explain exactly that and give a small overview of different languages and tech stacks each of them can be implemented in. What is your take on it? Did I miss something? Let me know!
December 29, 2019
A short introduction
I love tech, I love coding and I love sharing knowledge. So the question was: Why don't I have my own podcast?  Well, this changes now. I will share my knowledge about tech, coding, freelancing and all the other things related with you on here and will bring interesting interviews with people I highly respect and trust.  So stay tuned, give feedback and always keep on coding.
December 02, 2019