I've always been fascinated by building things and turning ideas into something real, which is what drew me to mobile apps back in 2010. Since then, my own apps have surpassed 15 million downloads, and I've had the chance to work with companies of all sizes, from early-stage startups to well-established businesses.
I'm free now and looking for an Android lead or senior role, remote or around Katowice, Kraków or Wrocław. Email me, or find me on LinkedIn and GitHub.
Dropbox
Android tech lead, Nov 2023 – present
- Led Android monetization: subscription flows, paywalls, upsell prompts, user segmentation and experiments on pricing, plans and billing periods.
- Built AI-agent workflows that took real work off the team, like reviews, investigations, test runs, code coverage and monitoring.
- Was part of the on-call rotation for revenue incidents, working with the incident manager and other teams to find and fix problems fast.
- Built media and preview features with Media3, like Live Photos and folder playback.
UNUM
Android tech lead, Jun 2020 – Jul 2023
- Built the Android app from scratch for a social media planning tool, as part of a three-person team at a US startup.
Ryanair
Android developer, Jul 2016 – Jun 2020
- Joined as one of the first three Android developers and helped grow the team to 11.
- Led the main app's move to clean architecture, from MVC/MVP to MVVM and from AsyncTask to RxJava. The app has since passed 50 million downloads.
- Built internal apps for staff along the way.
BLStream
Senior software engineering specialist (Android), Feb 2013 – Jul 2016
- Built a secure browser and email client for enterprise and government customers, which was the company's most important project at the time.
Own apps
Jul 2011 – present
- Health apps with more than 15 million downloads, led by Blood Pressure, which is rated 4.3 by more than 56,000 people.
- Built, shipped and monetized them on my own on Google Play and the App Store.
- Run them with AI-agent workflows for crash triage, review replies, turning user feedback into issues and store listings in more than 30 languages.
Tieto
Junior software engineer, Jun 2011 – Jan 2013
- Built software for Nokia Siemens Networks.
Wytwórnia Filmów Fabularnych
Computer graphics interface developer, Jul 2010 – Mar 2011
- Wrote the C++ interface and kinematics for a motion-control camera rig.
MSc in automatics and robotics, Wrocław University of Technology, 2011.
Interactive version: klimaszewski.mobi · machine-readable: resume.json · llms.txt