How Uber Handles TRILLIONS of Transactions

[@CodingWithLewis]

EDIT: Chiming in! The animations ARE NOT AI Generated! All were done using 3D software :) Thank you for 600,000 subs! This is by far the most ambitious video we have made! Thanks so much for letting me do this as a job. What content would you like to see?

[@0y0.s]

Waiting for yt awards

[@Faizan29353]

Lesgoo, (im a newsub , not even a month old but this is one of those channels which will help In my CS degree and self learning Dev journey if i don't go into Uni)

[@Captainmactavish28]

Make more of these. That was awesome

[@0y0.s]

@@Captainmactavish28 fr

[@ryansumbele3552]

more system design videos like this one

[@cocoasulphur]

I heard that a great deal of Uber's success actually came down to their map feature. Apparently, the inspiration was from James Bond - specifically the movie Goldfinger, where James Bond has to track Goldfinger's car. He has a map feature on the dashboard of his Aston Martin, which shows his tracked target as dot that moves along. Psychology says that people don't like waiting very much, but if they know exactly how long they need to wait, they feel better doing so. Uber really found a gap in the market and went for it.

[@CodingWithLewis]

James Bond does it again

[@cocoasulphur]

@@CodingWithLewis And to think, James Bond never even went to Oovoo Javer

[@nonefvnfvnjnjnjevjenjvonej3384]

i mean really the reason they grew is because they were cheaper than cabs due to vc money and cabs used to scam people.

[@Sammysapphira]

This is really odd, nor is it particularly a genius insight. Uber didn't invent tracking on maps.

[@YoKKJoni]

theres the same trick with ppl and elevators.. if ppl complain about long waiting times.. just put a mirror in front of them . that will keep them busy until the elevator arrives

[@gabrielfono844]

As backend engineer, I truly love this video.

[@444Yielding]

Legit

[@arwildo]

This is master piece, the story telling, the animation, the tech, the way you deliver, good job man 👏👏

[@ajaviles13]

Dude, this video is amazing not only from a storytelling POV but also the in-depth detail! Your animation / video editor killed it!

[@chiroyce]

oh my god i cant even begin to imagine how the code for this must've been, thousands or even millions of lines spread throughout thousands of services and systems all for a car ride 🤯

[@manishJ2910]

the worst part is not no of lines but the flow of the functions and their calls

[@johntu7484]

A “simple ride” hides massive engineering complexity once you multiply features, geographies, real-time demands, safety checks, compliance, and scale to millions of users daily. It’s not just about lines of code; it’s about coordinating dozens-if not hundreds-of specialized services to ensure that from the moment you tap “Request,” everything works seamlessly (and near instantaneously!) until you arrive at your destination. So yes-thousands upon thousands of services and millions of lines of code might seem extreme for ordering a car, but that’s what it takes to keep the experience as smooth, fast, and reliable as possible at a global scale.

[@FizWiz91]

My favourite scene was the one about migrating data from DynamoDB to the new LedgerStore database. It was so fascinating to watch. Great work Lewis!

[@johntu7484]

Huge Scale: Financial data is particularly sensitive; any mistake is costly. Watching them handle hundreds of billions of transactions with near-zero downtime is impressive. Complex Yet Seamless: The “behind the scenes” orchestration is intricate (multiple services, checkpoints, shadow writing), but from a user’s perspective, the transition is almost invisible. Reliability & Trust: It showcases how much engineering effort goes into ensuring no transaction is ever lost, highlighting Uber’s dedication to payment integrity-crucial for drivers and riders. That’s why that segment of the video is so compelling: it demonstrates top-notch engineering balancing massive scale, real-time demands, and unwavering data accuracy.

[@lukmanalghdamsi3189]

youtubers like you are way waaaay better than most colleges professors

[@dripps.]

crazy animations

[@CodingWithLewis]

That's the goal

[@ianmoore5502]

That can't really be it...can it?

[@cheapdramas313]

i liked it 2

[@Tibo11]

@@CodingWithLewis the 3d animations seem ai generated and some completely meaningless to me

[@djangbahevans1]

​@@Tibo11felt AI generated to me too.

[@dorian3017]

I'm not gonna lie... I've been vaguely interested in programming for years, but I never felt that interested to the backend side of things. This video changed that. Great quality, and great for a visual learner. Thank you 🙏!

[@rajavenkatesh5669]

This is the first ever video I’m watching from your channel and man …. The production quality blew me away .. good job man. Subscribed🎉

[@normb9785]

Lewis you took this to the next level!!! Love the animation, SFX and the storytelling. This one really grabbed my attention

[@boulama]

one thing for sure is that Uber knows how to name technical stuff. Because Shadow writer is so cool. And your animations are on point to illustrate that. 7:48

[@combatcraz2254]

This video was on a whole new level!!! I can’t believe that you improved so much!!

[@jcnykvrn]

The animations are really sick, so well made for someone who has just intermediary knowledge in dbs this is super helpful...

[@lztverygood]

bro your video is so high quality, the content + the animation, congrates!

[@bari-qb4og]

This editing style is the best I think I've seen in my life

[@metaphoricallyspeaking]

Have watched your videos for such a long time. Somehow, I wasn't subscribed?! Sorted that. Also - one of the best videos you've ever made. Great animations and interesting topic. Nailed it!

[@sunilprajwal5419]

I learned more from this video than from many college lectures.

[@realisticlevel2553]

Liked the script, the pace, the tone, and the technical details. However as other have said, the animations were too much and made it sometimes hard to follow as they were too distracting. However, I appreciate the rest, and the time that went into it. Just subbed!

[@raomotorsports]

Yo the editing and animations are top shelf

[@touchwithbabu]

Educating, Engaging and Entertaining :) Great work mate!

[@timothynwanwene4378]

This is the one of the most informative and useful information you have shared. Thanks.

[@Faizan29353]

The Animations Are really cool on this one dude

[@antonopaco]

First time to see your work. I'm impressed how you story tell things. Good job!

[@nickcolleran9212]

I died at the beginning when you said “a Lyft from one place to another”. Even though it clearly wasn’t intentional it still made me giggle

[@ItsZarif]

Amazing video and explanation. The ledger system is actually a great idea even for caching and keeping transactions data updated since we would only need to update calculations in a forward method vs traditional updates would cause a cache invalidation. Append only speeds up reusing older caches for new values a lot easier.

[@sarthaknirgude]

Story telling and animation is amazing 🙌

[@sebastianbotez]

Great content and animations. Congrats for the hard work and dedication 💪🏽🔥

[@ItsD3vil]

6:47 Holy Sh*t! The quality of these videos is going crazy!

[@BangladeshiUser-k4w]

Thank you very much for this quality content. I've seen many videos on how big tech companies are scaling their projects. But there are no quality video on how to do it by yourself, or I couldn't find one. I'd like to request you to make a video on how you would scale a PHP project with MySQL database. That video might cover, how you would tune your MySQL config, php-fpm pool, nginx worker, linux itself for handling files, cache leverage, slave db etc. Overall preparing a project for being production ready to handle huge traffic with low latency. That would be a great video. If you make your mind to create such video, I can't wait to see it. Best wishes ❤

[@wisdomelue]

i totally enjoy your engineering analysis videos💯

[@Smartlinuxcoder1]

Babe wake up, Lewis just cooked

[@sherlock.person]

Nah this Editing Style is low-key fire. Btw you edit these yourself?

[@CodingWithLewis]

Myself and Will :) @cocoasulphur

[@sherlock.person]

@CodingWithLewis Nah you do all that while doin programmin. I can't even only do programming lmao. Even though I hate Python developers, you shall be the one I respect.

[@abhilashp5123]

It is High-key fire.

[@sherlock.person]

@@abhilashp5123 Lol

[@sherlock.person]

@@abhilashp5123 Frfr

[@mukiibipeter07]

I had to move from PHP to node+express. That was a violent transition. But now feels peaceful

[@anaschaibi1459]

Great explanation and animation keep up the good work!

[@conroybogle3713]

Yes, thanks to Uber for donating their process. Great video. Deserving of the animations.

[@444Yielding]

This was a friggin great overview on the large scale topic of managing data.

[@CDHDeveloper]

Very well done Lewis, even compared to your usual grand presentations.

[@felixcalderon7258]

This was very enjoyable to watch! Subbed for sure!!

[@AkarshitJoshi]

Don't know which one was better the animation or the explanation ❤‍🔥

[@ngobenimsesenyaneplatius9862]

Brilliant work by the Uber Engineers because when you deal with Uber data volumes you're in your own league

[@lannyjr1042]

Fun fact: public blockchain are triple entry ledgers.

[@AmirparsaDD]

I love these formats

[@tomasbaron8465]

This is amazing. It’s tru, we take it for granted. What an amazing approach ❤

[@yanndjoumessi7130]

The narration was so interesting. I read the article once but was not really able to grab it

[@marma6937]

One of the best video on KZbin

[@DrMorax]

High quality content as always

[@jeddbinas]

It's amazing how so much goes into this type of stuff that end consumers take for granted. Just mind-blowing

[@AnonymousAccount514]

I love it when you say: The Shadow Writer

[@madukomablessed4712]

Your animations are golden!!! A new subscriber found in me!!!

[@madukomablessed4712]

If you could make these level of animations for data videos, I’ll definitely appreciate

[@dominuskelvin]

You are giving Darknet Diaries vibes and I love it buddy 😍

[@davideaton6876]

Great video I love your channel Lewis. Thank you for the awesome content. Years ago I got to experience “upsizing“ an Access database to SQL Server. Good times.

[@markkelvinpineda3949]

Amazing content, hope to see more of this :)

[@pyhead9916]

I took voluntarily took two accounting courses in college and never regretted it!

[@sathvikvutukuri9179]

Man crazy animations, need one more video on how you did it

[@bdbeats-rv4uf]

Another great video keep going man!

[@programmershourya]

I wanna see behind the scenes of you making videos and probably teaching how do you make such cool videos

[@matt.stevick]

very good topic and well done. uber is a an impressive company, it’s very difficult to operate in a tough competitive industry. i wish them the best.

[@shaunfurtado7368]

Great video❤. And the quality and animations are awesome, can we get a video of this animation workflow sometime. Would love to see it.

[@web-dev-zargo]

AMAZING VIDEO!!!!!

[@ismailalfiyasin2714]

7:11 to synronize two same table at deffrent database i think uber come with expesive approch, why not if once the asynronuse process fail he put that data somewhere and assign some worker to check to there if there data in there they just retry to insert it to the new database, ofcors this is not complete what if otherwise happend so old database need same mekanizm to ensure two database have the data

[@lexNwimue]

Great stuff, man. Awesome!

[@㘭]

Who in the world does your animations?? Fire 🔥🔥🔥🔥

[@nikhilrizal3729]

Keep it up the effort ❤❤

[@gtleshow]

Their innovative solutions are really paving the way for seamless transactions at this scale. It's impressive how they’re staying ahead of the curve with real-time processing and security. Major respect to the tech team making it all happen behind the scenes! 🔥👏

[@SabedCode]

Can You explain how one backend and database can work seamlessly with web, mobile, and desktop applications, *React for web, Flutter for mobile apps, React Native for desktop, Django as the backend, and MongoDB as the database?

[@hotfirefly]

In large-scale applications, you rarely hit the actual database directly due to the massive volume of data. Instead, they use technologies like Kafka to stream data, and often employ distributed databases because a single database cannot handle the load.

[@ncba]

Lol this reminds me of how OpenAI described their technology before DeepSeek was unveiled,take a somewhat complex concept, adding dramatic music, and making it seem like an extraordinary breakthrough beyond the reach of existing technology

[@neymik6827]

The visuals are fancy but not clear, sometimes may lead to confusion, better add some labels or work on narration

[@ismailalfiyasin2714]

People complaint about animation, but i think animation on point, animation show literaly what he is talking about

[@camilordofficial]

great video, thanks man!

[@nacherel714]

This video felt very hypnotic to watch

[@12345abcd_qwerty]

nice traditional design the challenge lies in the creating a system which is consistent and efficient.

[@tshiamomotshabi9862]

This is interesting and crazy at the same time. So many layers and building blocks behind the product. I imagine the team is quite steep 😅

[@soul_slayer707]

ur vids are really great but this 3d animation, luv it

[@damnnn.]

subscribed for animations and technology talks.

[@anakinskywalker192]

Time to give your video editor a raise

[@frankkuipers2024]

I like this video, love that you made a video about backend structures wich I am trying to learn right now

[@anam-0077]

the fact, migrating big database in production is so challenging.

[@johntu7484]

While the Goldfinger reference makes a great story-and certainly captures the imagination-the core reason it worked is that real-time location tracking solved a very real user pain point: the anxiety and frustration of waiting for a ride in the dark. It just so happened that James Bond showed us, decades earlier, how cool that could look.

[@shis10]

Amazing video 🙌🏻

[@kautilyapodagatlapalli6128]

Love the animations!!!

[@stachowi]

Production quality is crazy

[@TheStRaX_]

W editor to be honest.

[@keinaanabdi6821]

As an Uber driver The example of $18 going to the driver and $2 to Uber really hurts my gut! These day $7-8 goes to driver and $13-12 goes to Uber

[@lakshman587]

Animations were next level!!

[@quirkyquester]

Your video is gold

[@naaziz-ytyt]

Awesome 👍 animation 🎉🎉

[@feyroozcode]

How lewis handle billions animation in 13 munutes 😂

[@alexruiztagle476]

THE QUALITY IS INSANE HOLYYY

[@depresty]

This the quality i want to watch

[@nofx714]

this makes me think if uber struggled to transfer their databases, how do these big international banks do it? Where money is their biggest concern, Ive had many times where funds are missing from my bank account, only for me to call the bank to figure it out.

[@ismailalfiyasin2714]

The simple answer just never ever migrate to another database, migrate database cost lot of effort and thought and last but not least headache, specially if you have really big data like bank companys, if money lose happened like you deposited money to your bank account and they money does not come in to your account the developer will check on your ledger this is the history like evey changes on your balance will store in here. Fun fact this video is all bout ladger 😅😂

[@alexisriviere4541]

I clicked on this vidéo to understand how to manage big data, like trillions for example. Well at 11:40 you start talking about it but you never really explained how to handle such a huge amount of index, I'ld have like some stuff about load-balancing, and other tech used :( . Except from that the quality of the video is great and it's a good introduction to big data management.

[@ralphwealth163]

love this videos, can you do more videos in this direction

[@gpshangari]

Of course a company no one has ever heard of will give the Uber system design as an interview question

[@stergiosdikos]

Underrated account

[@johntu7484]

Uber’s story is a masterclass in high-scale financial systems engineering: designing for immutability and correctness, handling enormous data migrations carefully, and employing a flexible, multi-tiered indexing strategy to ensure queries remain efficient at truly massive transaction volumes. It’s an important reminder that once you scale to billions of transactions, every detail of data integrity and migration must be carefully considered-particularly for anything involving money, audits, or compliance.

[@nikolaaa7180]

I like the animations!

[@yassine-sa]

The animations are all fun and cool, but I think they're getting in the way of information transfer by oversimplifying concepts, use them carefully please, even though the more you add the cooler the video looks and the more views you'll get

[@bot64397]

Yeah I couldn’t comprehend them. A 2D graph is clearer.

[@benjaminrichards4709]

I liked the animations, the video is clearly not intended as purely educational content, you can go to the articles for that.

[@yassine-sa]

@benjaminrichards4709 Okay, I thought it was educational; that's why I commented. And no, there are a lot of amazing educational videos, articles aren't the only way, albeit they are probably better if you are more serious about learning.

[@codewrangler]

Great video, 🎉, does anyone think that their system is over-engineered?