HNHacker News
TopNewBestAskShowJobs

ylhert

921 karma · joined April 14, 2014

YC Badge: 0xde1bcd16db70a3feb2368d170271a6eff4cd5da0
submissionscomments
ylhert··on Ask HN: Who is hiring? (January 2026)
Opendoor (https://www.opendoor.com) | In Person | San Francisco, CA | Full-time

We're hiring engineers across the stack at Opendoor. We're building technology to simplify residential real estate - making it easier to buy and sell homes. Our engineering challenges span everything from marketplace dynamics and pricing models to complex operational workflows and integrations with industry systems. If you're interested in applying technology to modernize a massive, traditional industry, we'd love to hear from you. yan at [our domain].com :D

ylhert··on Ask HN: Who is hiring? (December 2025)
Opendoor (https://www.opendoor.com) | In Person | San Francisco, CA | Full-time We're hiring engineers across the stack at Opendoor. We're building technology to simplify residential real estate - making it easier to buy and sell homes. Our engineering challenges span everything from marketplace dynamics and pricing models to complex operational workflows and integrations with industry systems. If you're interested in applying technology to modernize a massive, traditional industry, we'd love to hear from you. yan at [our domain].com :D
ylhert··on Show HN: OCR Arena – A playground for OCR models
We've got like 10 LLM arenas but nothing for OCR yet, really hope this takes off!
ylhert··on Ask HN: Who is hiring? (November 2025)
Opendoor (https://www.opendoor.com) | San Francisco, CA | Full-time We're hiring engineers across the stack at Opendoor. We're building technology to simplify residential real estate - making it easier to buy and sell homes. Our engineering challenges span everything from marketplace dynamics and pricing models to complex operational workflows and integrations with industry systems. If you're interested in applying technology to modernize a massive, traditional industry, we'd love to hear from you.

yan at [our domain].com :D

ylhert··on The Death of NYC Congestion Pricing
The fundamental piece you are missing with your logic is that the negative externalities of driving a car are massive and not borne by those making the choice to drive. This leads to people choosing to drive a car at a rate that is much higher than the optimal balance for society. The best way to control for these negative externalities (risks to pedestrians, noise, pollution, congestion) is with a tax. In the US, we subsidize car usage in an eye watering and incredibly unfair way, which results in overuse of cars. If public policy were to better reflect the actual costs of driving a car, few would be able to afford it or choose it over other options
ylhert··on Why you've never been in a plane crash
The cognitive dissonance people have around this issue is astonishing. We are willing to ground the 737MAX fleet when a few people get a (surely terrifying) open air flying experience; but 44,000 people are killed on the road in the US _every_ year (and rising!) and very few people seem to care. In most age cohorts, death by car is the largest killer. In the US you have a 1 in 107 chance of dying in a car crash in your lifetime. Even simple and completely reasonable measures to reduce these insane numbers are seen as some kind of tyrannical affront to ones freedom (see the current CA measure to add speed limiters).

The car industry, car culture, and car centric thinking in the US and much of the world is totally out of control.

ylhert··on YouTube TV, which costs $73 a month, agrees to end "$600 less than cable" ads
It's wild to me how much Youtube TV costs and yet they still serve you tons of ads. Coming from youtube premium where occasionally I have to skip through a preroll ad, I forget how much you are bombarded with ads while watching traditional TV. The fact that you have to pay the princely sum of $73/month on top of that boggles my mind. I canceled when they raised the price from $35/month and I'll never go back at these prices...
ylhert··on In California, Car Buyers Are Choosing Electric over Gasoline in Record Numbers
There are a number of reasons why battery swapping is not feasible in the real world, among them: - Batteries age differently from one another, so swapping would only be fair if you had a similarly aged battery that had a similar number of miles & charge cycles on it - Batteries need to be taken care of (like not using the last 10% at each limit of the battery). some people take really good care of their batteries, others don't. I would never want some random battery swapped into my car, as I've taken really good care of my car's battery - Batteries are structurally built into the vehicle, and making them easily removable would make a lot of the engineering more difficult - Batteries could become commoditized so that they fit in any car, but right now there are tons of different shaped & sized batteries, so it would be really hard to build the tooling to support all these different cars & battery types
ylhert··on Lessons by 3blue1brown
3blue1brown gives me hope that there are a few Michael Jordan level teachers out there, and youtube/the internet will allow us to find those people and reward them appropriately
ylhert··on An ode to that “coffee friend”
Coffee friend here! This is the way! When people get me coffee or coffee paraphernalia as a gift, they tend to fall into a number of traps:

- Not understanding my nuanced preferences and getting me something I know about and don't like

- Not appreciating how to choose a good product (for example, with beans, an old roast date of more than 30 days means sad & stale coffee)

- Getting me something I like but I already have

In many cases I of course smile and am polite, and of course I am truly grateful for the thought, _but_ there is a level of disappointment which I have to hide because it saddens me to be wasteful, and I don't like putting on a performance. There are very few if any coffee things that I like but don't have, and are at a gift level price point (<$100). For consumables like filters and beans I have nuanced preference and it's unlikely that you'll happen to choose something that I like, but very likely that you'll choose something I know I don't like.

From this experience as a recipient, I have learned to be very careful about the gifts I give to others. I steer clear of things in the realm of someones passions, and try to share something I know and love. For example, I don't give whiskey lovers whiskey, or whiskey glasses, because I don't know what kind of whiskey they like, and I'm likely to give them something they know and don't like! So often times I'll use my superpower of knowing a lot about coffee to give the whiskey lover a high quality coffee that they would probably have more difficulty finding or choosing themselves. A great conversation can ensue where I can share why I think that coffee is great and interesting, and why I think they'll enjoy it.

Conversely, when Whiskey person wants to get me a gift, I would much prefer they give me a whiskey they like and think is great, and explain it's merits to me. I don't know much about whiskey, so it's easy to wow me and I love learning about it from friends who do!

ylhert··on Too many Americans live in places built for cars – not for human connection
The car has done so much damage to our world and most people are completely blind to it. Obesity, climate change, isolation/loneliness, excess deaths/injuries from collisions, out of control housing costs, can all be tied back in a major way to car centric society. And yet people will defend their car and the "convenience" of it like their life depends on it, and force it down the throats of everyone around them. Boggles the mind.
ylhert··on College Was the Biggest Mistake of My Life
I don’t think 4 year college will ever go away, especially for great academic students. That said, the argument is that the cultural pendulum has swung far too much towards pressuring everyone, regardless of their life goals, into attending a 4 year college. There are so many great alternatives, especially if you don’t want to be a doctor/lawyer/ etc. as a society, we should elevate blue collar jobs and career paths, and not elevate the cultural value placed on 4 year degrees (esp from random non prestigious private schools). Most blue collar jobs (plumbers/electricians) are interesting, enjoyable, and fruitful work (150k+), but in the US many people look down on these careers and steer their children away from them.
ylhert··on College Was the Biggest Mistake of My Life
I agree for the most part, but I don’t think many of these creative endeavors are helped by college (and the costs/debt it brings). In fact, there is a counter argument that perhaps there would be more successful creatives if we did not push everyone to go to college and take on lots of debt; they would have more time, energy, and money that they could more directly apply towards the pursuit of those creative dreams
ylhert··on Letter from Union Pacific to LA District Attorney re: train thefts, safety [pdf]
> UP can increase their investment in securing their trains and property

Not sure what more they can do, considering the fact that they go so far as to weld these container shut now.

ylhert··on From Node to Ruby on Rails
Preach! I do not understand this criticism at all. Rails scales just fine, in a web app it's the DB that's the bottleneck 99% of the time. Sure, the ORM can get you into hot water easily if you do dumb things (or just don't pay enough attention to N+1's etc), but one should be using the ORM wisely and deliberately, rather than living ignorantly of what's happening behind the scenes.
ylhert··on From Node to Ruby on Rails
I understand the "too much Magic" criticism of Rails from novices & intermediate Rails developers, but once you reach a sufficient level of mastery, I think this goes away.

After using Rails every day for 12 years I know pretty much all the ins and outs, and what is "magic" to others is just the robust tooling I love. Just like any tools, they are overwhelming and daunting when you don't know how to use them, but once you become proficient with them, they make your life so much easier. While it might be difficult when the "magic" doesn't do exactly what you want for your edge case, when you have a sufficient level of mastery, it's easy to find a way to adapt/modify/override the tooling and make it do what you want. Further, many times the tooling is there to keep you from doing things you probably should not be doing, and this kind of strict, opinionated, best practice enforcing philosophy has gotten me out of trouble at times, and I think it makes it much easier for engineers to move between Rails codebases and start being productive even faster.

I've done plenty of Node/JS/React and I honestly do not understand how people can prefer to use these stacks over Rails. For full stack web dev, Rails is such a pleasant place to work every day.

ylhert··on Apple Makes Magic Keyboard with Touch ID Available for Purchase
I wonder if we'll ever see 3rd party support for Touch ID - it'd be amazing to have touch ID in a mechanical keyboard!
ylhert··on Ask HN: Who is hiring? (June 2021)
Proton | Backend, Frontend | Remote | Fulltime / Flextime We’re a digital distributor for electronic music labels, artists, and DJs. Distro platforms like Proton help deliver music to other platforms like Beatport, Spotify, or YouTube who sell, stream, or monetize music. Over 2000 music labels trust Proton to power their catalog, with over 1M streams daily on Spotify alone. Learn more about us in the links below,

Infrastructure Engineer (PHP, Docker): https://docs.google.com/document/d/1AP6D0qmWw5Ewdi59OHBi60eY...

API Engineer (Rails): https://docs.google.com/document/d/1RAwGEic9qHqe5eTUmCRsKRcR...

ylhert··on History of Techno
I agree completely - techno is hypnotic and almost by design is meant to be heard and not listened to, and I find this really helps me maintain focus/flow while working. No vocals, ear catching melodies, or overdone chord progressions that try to grab your attention. Techno is my go to work music for this reason!
ylhert··on Cycling is more important than electric cars for reaching net-zero cities
nearly every one of your concerns is addressed by this wonderful youtube channel - "Not Just Bikes": https://www.youtube.com/channel/UC0intLFzLaudFG-xAvUEO-A
ylhert··on Silicon Valley exodus: Bay Area tech companies leaving for Texas
there is a lot of evidence to suggest that high housing costs cause homelessness
ylhert··on Silicon Valley exodus: Bay Area tech companies leaving for Texas
I totally agree and I think property taxes are way more fair and equitable for a society than income taxes. Usually we tax behaviors we want to curb. Income taxes disincentivize people from earning more, whereas property taxes are a consumption tax. In my mind this makes way more sense, and there's good data to suggest property taxes are the best/most efficient way to gain needed revenue for a city but do the least "damage" to economic prosperity
ylhert··on Tech elites leaving San Francisco threaten Silicon Valley's supremacy
Agree, and a lot of those events were 60-80 years ago. I doubt that the amazing innovation and clever governance that allowed these events to happen (or cultivated them) would be possible today
ylhert··on Tech elites leaving San Francisco threaten Silicon Valley's supremacy
What about other municipalities/areas who have great universities and contributed to WW2? There are many examples of areas with similar initiatives and prestigious universities but have not reaped the same outsized rewards over the past 60-80 years as SFBA. So I would posit that it is more luck than execution, and thus qualifies as a resource curse
ylhert··on Tech elites leaving San Francisco threaten Silicon Valley's supremacy
Tech in SFBA reminds me of the Resource curse (https://en.wikipedia.org/wiki/Resource_curse). SFBA did nothing special to attract the wealth of technology companies, they effectively got lucky with Shockley/Fairchild/Traitorous 8 and the boom in technology that followed. It seems the local gov't have squandered an opportunity to truly capitalize on the gift they were given, and perhaps even done their best to jeopardize these resources.
ylhert··on Ask HN: If you could work remote where would you live?
Weed is basically legal in Barcelona. It’s not quite as legal as California, per say, but there are shops you go to (membership required) which sell over the counter
ylhert··on Coronavirus Declared Pandemic by World Health Organization
Does anyone know how many times the WHO has declared Pandemics in its history?
ylhert··on California passes bill that classifies gig economy workers as employees
From the bill:

  (c) The misclassification of workers as independent contractors has been a significant factor in the erosion of the middle class and the rise in income inequality.
It really irks me that they can posit this in legislation without supporting data. It seems like a dubious claim, at best.
ylhert··on The open-office trend is destroying the workplace (2014)
Peopleware advocates the 3-5 person office, and has some great research to back it up
ylhert··on [dead]
My mom moved from Los Angeles to Switzerland about 5 years ago. She is very happy, makes good money, and plans on retiring there. I visit regularly and while it's a bit boring for young people, it's a beautiful, civilized country filled with well educated, tolerant people. If I raise a family I would prefer to do it there!
Page 1 of 3Next →