Engineering @EF | React Native
Boston, MA
Joined November 2012
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Pinned Tweet
Visualizing every BlueBike ride in 2025:
- 📆 Select a day and scrub through time
- 🔬 Zoom in on specific rides to see details
- 📊 See how many rides are active at any given time
ride.ericzeiberg.com
Reminds me of the guy who tried to make a model to predict flight delays in Europe in order to farm delay compensation vouchers
Wow, my daughter just text me that the airline asked for 5 volunteers to get off the plane for $1200 free lodging and a free flight tomorrow. The problem was Weight on the plane. A family of 5 took that amazing deal.
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Eric Zeiberg retweeted
OH MY GOODNESS 😱
UCONN LEADSSSS UNBELIEVABLE
#MarchMadness
Thinking of introducing a cool UI/UX pattern into your app?
Look at the leaders in the space (like AirBnb on mobile, or Netflix on desktop / TV)
If they don’t do it, it means they’ve probably run a test and found that it isn’t effective!
No need to reinvent the wheel
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Let me open the match view from here by tapping on the game and this is perfect. Another common Apple sports W
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Eric Zeiberg retweeted
Great report! For those who want to see a visual representation of how folks get around on @RideBluebikes, I built a tool:
replay.ericzeiberg.com
This + wrapping everything in useCallback or useMemo
tbh coding agents are still net-bad at real frontend tasks
❌ figma to code
❌ React.useEffect
❌ complex interactions / flows
❌ animations
❌ web performance
❌ responsive design
❌ ARIA
❌ drag and drop
❌ virtualized lists
❌ async data fetching
❌ mobile gestures
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Eric Zeiberg retweeted
Word of the day: Sneckdown
After a snowstorm, cars will naturally carve out the paths that they actually need
The space they’re not using can be reimagined for something more useful!
Eric Zeiberg retweeted
Visualizing every BlueBike ride in 2025:
- 📆 Select a day and scrub through time
- 🔬 Zoom in on specific rides to see details
- 📊 See how many rides are active at any given time
ride.ericzeiberg.com
Powered by @vercel, @openstreetmap, Deck GL, OSRM
Thanks to @RideBluebikes for the data!
Blog post coming soon with more details on how I built this
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In an era where LLMs are allowing devs to write more and more code, I feel like @github should be prioritizing fixing the clunky dinosaur that is their PR + code review feature set, especially for large changsets…
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Wrote a blog post about how the @EF engineering team handles the unique challenge of maintaining multiple mobile apps from one codebase. Check it out below!
eftech.com/blog/posts/multi-…
Very cool concept! @Pragmatic_Eng reported recently that Meta has begun to roll out a similar concept internally, known as "trajectories"
a mockup: doing PR reviews by seeing a programmers chain of prompts!
it also encourages devs to be deliberate with how they instruct llms as they become more capable, and poor human instructions + context ends up being the reason why code doesn't work
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