JarekOnTech's profile picture. I build apps and make stuff happen. Google Developer Expert / Android

Jarosław Michalik

@JarekOnTech

I build apps and make stuff happen. Google Developer Expert / Android

You'll get the best feedback from your users. But what if you don’t have any? (or you’re too scared to talk to them)? > Record a screencast of your app > Upload it to Gemini 2.5 (via AI Studio) > Add a prompt: “act as an unhinged user, explain what you see in the app and…


When I start working on a new feature... > fire up my assistant (Claude, in my case) > prompt: “act as an event storming coach (...) ask me questions (...) create a process map in Mermaid” > discuss, iterate > you get a process map - it goes into docs and provides context for…


Building EngageUp.io day 37. User acquisition path (experiment): - I’m promoting the "roast your reel" page - user gets a few metrics and basic analysis - "want more? Create an account!" After creating an account, all metrics are visible + the ability to add your…

JarekOnTech's tweet image. Building EngageUp.io day 37.

User acquisition path (experiment):
- I’m promoting the "roast your reel" page
- user gets a few metrics and basic analysis
- "want more? Create an account!"

After creating an account, all metrics are visible + the ability to add your…
JarekOnTech's tweet image. Building EngageUp.io day 37.

User acquisition path (experiment):
- I’m promoting the "roast your reel" page
- user gets a few metrics and basic analysis
- "want more? Create an account!"

After creating an account, all metrics are visible + the ability to add your…
JarekOnTech's tweet image. Building EngageUp.io day 37.

User acquisition path (experiment):
- I’m promoting the "roast your reel" page
- user gets a few metrics and basic analysis
- "want more? Create an account!"

After creating an account, all metrics are visible + the ability to add your…

LLMs have STRONG confirmation bias. When asked "is this good?" they start looking for reasons why something IS GOOD. But if you ask... "Find ALL problems in this code. Be RUTHLESS." Suddenly the same model, in the same conversation, will spit out a list of 15 potential bugs,…


Side Project Lifecycle: Day 1 - This will be the next Facebook! 👉 Just finished your fifth rewatch of The Social Network. 👉 Buy a domain (so cool, so cheap!) 👉 Plan to quit your job 👉 Check how to set up a company in Cyprus Excitement lvl 10^6. Day 7 - "Maybe I should do…


A data science agent popped up in Google Colab. 👉 Upload your CSV 👉 Agent reads the file 👉 Explores data 👉 Conducts analysis 👉 Creates reports with charts All within Jupyter Notebook—view and tweak every step. Accelerated video: March Stripe data analysis took about 3…


thank you for nothing

JarekOnTech's tweet image. thank you for nothing

Coding with @cursor_ai feels like magic.


Signs You're Writing "Smart" Code 👉 You can't explain it simply to a colleague 👉 It requires extensive comments to understand 👉 You're using advanced language features unnecessarily 👉 You're solving problems you don't have yet What else?


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