# David Pichsenmeister

> Investor, Sr Software Engineer @ Slack, ex-Founder

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/davidpichsenmeister

## Work Experience
### Senior Software Engineer @ Slack
Jan 2021 – Present | San Francisco, California, United States

### Software Engineer @ Slack
Jan 2020 – Jan 2021 | San Francisco, California, United States

### Partner Engineer @ Slack
Jan 2019 – Jan 2020 | San Francisco, California

### CTO & Product Manager, Co-founder @ oratio – Connecting Businesses and Customers on Messengers
Jan 2015 – Jan 2018
oratio is a customer communication platform enabling businesses to communicate with their customers on existing messaging platforms such as Facebook Messenger, Viber, Twitter DM, Telegram or Kik.

* Developed a customer service messaging platform for businesses started in 2015, supporting WhatsApp, Facebook Messenger, and Telegram at a time where they didn’t have APIs yet
* Designed a microservice architecture with microservices written in Scala, NodeJS, Typescript, and PHP
* Managed development and product. Led an international & distributed team of 7 people
* Worked with the Facebook Messenger team on a Handover Protocol to improve and ensure inter-connectivity between 3rd party apps for pages
* Designed a REST API for developers to build integrations for our platform
* Grew our MRR from $200 to $20k in 16 months

### Organizer @ ChatbotConf
Jan 2016 – Jan 2017 | Vienna
ChatbotConf was the first European and second largest chatbot conference worldwide for two years in a row with 400-500+ attendees each which was taking place in Vienna, Austria with speakers from leading companies like Facebook, Slack, Viber, Google, Microsoft, and more.

### Lead Developer / CTO @ SmartHires (YC S14)
Jan 2014 – Jan 2015 | Vienna / San Francisco
SmartHires created a candidate sharing network between 400 top companies, including Zenefits, Slack, Pinterest and Asana.

* Built an initial version of a candidate sharing network from concept to launch in less than 6 weeks based on Laravel/PHP and AngularJS.

### CTO, Co-Founder @ orat.io - pro & contra discussions
Jan 2014 – Jan 2014 | Berlin / Vienna
orat.io - pro & contra discussion was a platform where users could discuss various topics in a structured way. Additionally publisher and blogger could integrate these discussion style in their website as a discussion plugin.

* Developed and managed a JavaScript website widget for publishers to increase comments of site visitors by an average of 700%, used by 200+ publishing websites, funded by one of Germany’s biggest online publisher: Axel Springer
* Improved a monolithic PHP website to a service oriented architecture developed in PHP, Scala, and Typescript with automated testing, continuous integration, and continuous deployment

### Full Stack Software Developer @ Freelancer
Jan 2010 – Jan 2014 | Vienna, Austria
* Built web services and webapps for various clients using GWT, Java, Scala, TypeScript, and AngularJS
* Developed a rudimentary 3D image reconstruction framework based on OpenCV and C++ 
* Designed the software architecture of an IoT enabled charging device for electric vehicles, using Android, Java, and Spring
* Designed and build the software infrastructure of an IoT cloud enabled charging device for electric vehicles by developing an distributed cloud backend using Spring and Java, and an Android client app as communication interface


## Education
### Bachelor's Degree in Software Development and Business Management
Technische Universität Graz


## Contact & Social
- LinkedIn: https://linkedin.com/in/pichsenmeister
- Portfolio: https://pichsenmeister.com

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Source: https://flows.cv/davidpichsenmeister
JSON Resume: https://flows.cv/davidpichsenmeister/resume.json
Last updated: 2026-03-29