Hi, I’m Waldemar - a Scala & Big Data engineer from Warsaw with 15+ years of commercial experience in banking, fintech and the public sector.
This is my tech blog: software development and everything around it - tools, hardware, operating systems and the way we work.
Outside of work I’m a father and a motorcyclist ;)
Scala is the best JVM language out there, and it has been my main language for over 10 years. It runs on the JVM, in web browsers and natively. Lately I spend my open source time on Scala tooling for HOCON configuration files.
TLDR: From 5 September to 11 October 2026, I logged 5.73 billion tokens, mostly cached context; 11 October is partial. Subscriptions give me a huge discount against API prices; cheap Chinese models lower what I will pay for delegated work. Claude remains worth a premium as my trusted orchestrator.
I extracted the usage with:
npx ccusage -s 2026-09-05
All models: 5.73 billion tokens
Category Total Reported total tokens 5,726,005,355 Costs priced by ccusage $1,344.89 DeepSeek actual spend $17.38 Report valuation plus DeepSeek spend $1,362.27 Output tokens 35,054,182 Uncached input...
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Met Scala - my main language ever since.
Software developer in banking, fintech and the public sector.
You can request my CV by email - it includes my phone number. You can also find me in the Scala Poland community.
Job offers are welcome. The best first message tells me about the project, the team and the tech stack.