mtejo
mtejo on Hacker News
Ive been running with this little ongoing project of making little nintendo ds games with rust.
I put together a pretty basic portal clone. I think its pretty cool to see it come together, animations, level creation, portal jumps.
The basic hardware on the ds makes 3d pretty approachable. Ive found opengl overwhelming in the past. It seems like a fun platform to make games on, but idk if there is any active ds homebrew communities. Anyway sharing because i thought it was cool, hard to find anyone that seems to be to interested. I thought about getting a 3ds but they are surprisingly expensive now
Posted by
mtejo on Friday February 27, 2026 @10:42AM
from the matthewtejo.substack.com dept.
I did see that but the readme kind of scared me off.
With enough effort yeah. Since it can use all of libnds all of the input, displays, memory regions are available to use.
Posted by
mtejo on Wednesday February 18, 2026 @02:37PM
from the matthewtejo.substack.com dept.
Posted by
mtejo on Tuesday February 03, 2026 @10:48AM
from the matthewtejo.substack.com dept.
Wrote a short blog post about my experience working on Anthropic's public performance interview question.I really wrote it too, AI only helped with the code lol
I was curious how type checkers work for python, so I started making my own toy one.
Github repo has a link to what I plan to make a series of blog posts I started writing about it
https://github.com/tejom/python-type-check
Thanks for checking it out! I think with a lot of good data there is some cool stuff like that you could figure out. There is a pretty busy spot, that is fun but a bit of a trek. I wanted to find out for my self when the best time to go there might be. Turns out the camera might be to low res.
Hah I never have a thing to show off.... yay unemployment?
I made a little thing to count and track how many people are surfing on surfline's webcams to learn a bit about ml/ai, computer vision and deploying these things. I think its neat, and the data is fun in a nerdy way. Not sure what to do with it now. Its been cool, I had to get my own dataset together for it to work.
Check it out at and click around dp52hy5y2zsyt.cloudfront.net
I haven't committed enough to it to buy a domain.
Hey, Wrote about some work I did a couple years ago at Twitter. Thought people might be interested in hearing a little bit about how some things work there. I shared something about Twitter infra before and that was the feedback I got. So I hope this is interesting too!
Posted by
mtejo on Wednesday March 08, 2023 @07:30PM
from the matthewtejo.substack.com dept.
twitter runs its own datacenters and has teams to support that. Since its not in a cloud the company runs all their own internal platform stuff you would get on something like aws. that is a large engineering effort. theres also the andorid and ios app, more teams. elon tweeted out a picture for tweet or timeline reads i think. each square is basically a team with an oncall rotation. this is off the top of my head, there's plenty more not visible stuff happening
Thanks! There was a lot in that and I didn't follow it closely. Honestly that always confused me about the dc failing prep. Like I get that it would be a good idea to have a documented plan but at the same time, we did lose a whole DC and figured out how to recover(not that it was that easy) Im not sure having a cold boot prep plan would have helped that much. The things that failed that I dealt with personally during that event, I don't know if I would have foreseen. The site went on afterwards so it didn't seem to be existential.
Hah fair point, I was trying to write for a more general audience. Part of blogging for me is to improve my written communication skills. Appreciate this!
lol dont worry, nothing compared to how bad the anonymous internet can be anyway!
Yeah there was a few teams trying to make it happen
The company was moving off it. I wish I could find a twitter eng blog about it. Interesting there's a bunch of not directly from twitter sources about the decision though.
Over the summer, Yeah there is three but I didn't think the 3rd was really running yet. It was kind of just there with some small things dripping in.
Thanks I agree, I think small issues can build up over time, itll be interesting to see what happens. Wish I could see the future post mortem docs from the outages
haha I'll go fix that. sorry :(
Thanks! Yeah the other guy is right
Hey, sorry for the new account, i just like to try my best to keep my online identity separate. this for better or for worse has my real name on it. Hope this is interesting!
Posted by
mtejo on Monday November 21, 2022 @10:20PM
from the matthewtejo.substack.com dept.