Most successful project... What is success?

My first computer at 8 years old was a Commodore64. There was no internet yet, so I used the manual to learn about BASIC and assembly, sound and sprite registers, and created a pretty elaborate RPG. Mostly text, some sprite art, soldered some eeprom cartridges, optimized the code. Spent almost a year on it. An enthousiast magazine picked up on it, revised, QA'ed & published the game, sold a little over 10k samples. I got ƒ0.25 per sale, and I was completely overwhelmed how much candy one could buy for ƒ2500 ($2k corrected for inflation).

More recent:
I was employee #3 at my current company, started when it was worth nothing and the website redirected to a set of Google Forms containing all the logic. I wrote a large part of the first, monolithic backend.

Now there's teams in a dozen countries, and an estimated revenue of a quarter billion.

So obviously my current "project" is more successful.

Still, my current job sucks, the company turned into a desolate passion-free wasteland full of soulless fake hipster zombies and managers who seem to derive sexual pleasure from holding extremely ineffective meetings, endlessly rubbing their calendars together in their bureaucratic orgy of ineptitude.

So, I'm more proud of my C64 game.

The ""operating system"" of questionable quality I hacked together from scratch and alcohol

Most successful? Well, this one kinda is...

So I just started working at the company and my manager has a project for me. There are almost no requirements except:
- I want a wireless device that I can put in a box
- I want to be able to know where that device is with enough accuracy to be able to determine in which box the device was put in if multiple boxes were standing together

So, I had to make a real time localization system. RTLS.
A solo project.

Ok, first a lot of experiments. What will the localization technique be? Which radio are we going to use?
How will the communication be structured?

After about two months I had tested a lot, but hadn't found THE solution. So I convinced my manager to try out UWB radio with Time Difference Of Arrival as localization technique. This couldn't be thrown together quickly because it needed more setup.

Two months later I had a working proof of concept. It had a lot of problems because we needed to distribute a clock signal because the radio listeners needed to be sub-nanosecond synchronous to achieve the accuracy my manager wanted. That clock signal wasn't great we later found out.

The results were good enough to continue to work on a prototype.
This time all wired communication would be over ethernet and we'd use PTP to synchronize the time.

Lockdown started.

There was a lot of trouble with getting the radio chip to work on the prototype, ethernet was tricky and the PTP turned out to be not accurate enough. A lot of dev work went into getting everything right.

A year and 5 hardware revisions later I had something that worked pretty well!
All time synchronization was done hybridly on the anchors and server where the best path to the time master was dynamically found.

Everything was synchronized to the subnanosecond. In my bedroom where I had my test setup I achieved an accuracy of about 30cm in 3d. This was awesome!

It was time to order the actual prototype and start testing it for real in one of the factory halls.

The order was made for 40 anchors and an appointment was made for the installation in the hall.

Suddenly my manager is fired.

Oh...
Ehh... That sucks. Well, let's just continue.

The hardware arrives and I prepare everything. Everything is ready and I'm pretty nervous. I've put all my expertise in this project. This is gonna make my career at this company.

Two weeks before the installation was to take place, not even a month after my manager was fired, I hear that my project was shelved.

...
...

Fuck

"We're not prioritizing this project right now" they said.

...

It would've been so great! And they took it away.
Including my salary and hardware dev cost, this project so far has cost them over €120k and they just shelved it.

I was put on other projects and they did try to find me something that suited me.

But I felt so betrayed and the projects we're not to my liking, so after another 2-3 months I quit and went to my current job.

It would've so nice and they ruined it.
Everything was made with Rust. Tags, anchors, RTLS server, web server & web frontend.

So yeah, sorry for the rambling.

There are a couple:

A system that updates user accounts to connect them into our wifi system by parsing thousands of processing files written in Clojure. The project was short lived and mainly experimental, It has complete test cases and the jar generated from it is still purring silently on the main application. It was used to replace an $85k vendor application that made no fucking sense. The code has not been touched in 2 years and the jar is still there. The dba mentioned the solution to the vendor, the vendor tried buying it from me, but being that it belongs to the institution nothing was touched, still, it got the VP's attention that I can make programs that would be bought for that level, it caught his attention even more when I showed him the codebase and he recognized a Lisp variant (he is old, and was back in the day a Fortran and Cobol developer)

A small Python categorical ML program that determines certain attributes of user generated data and effectively places them on the proper categories on the main DB. The program generates estimates of the users and the predictions have a 95% correctness rate. The DBA still needs to double check the generated results before doing the db updates. I don't remember how I coded it because I was mostly drunk when I experiment on the scenario. It also got the attention of the VP and director since the web tech manager was apparently doing crazy ML shit that they were not expecting me to do, it made them paranoid that I would eventually leave for a ML role somewhere, still here, but I want more moneys!!

A program that generates PDF documentation from user data, written in Go, Python and Perl (yes Perl) I even got shit from the lead developer since I used languages outside of their current scope of work. Dude had no option but to follow along with it :P since I am his boss

Many more. I am normally proud of my work code. But my biggest moment is my current ntural language processing unit that I am trying to code for my home, but I don't have enough power to build it with my computers, currently, my AI is too stupid, but sometimes it does reply back to my commands and does the things I ask it to do (simple things, opening a browser, search for a song etc) but 7 times out of ten it wont work :P

Honestly my midterm project from college. It was never a production project just supposed to go into my portfolio. Who knew that building a functional social media app in 3 months in a language you never knew is actually SO IMPRESSIVE to people that it alone gets you an internship and a job.

A system to build note-taking systems. tatatap dot com.

It’s the most successful for a few reasons: it got launched, people find it useful, but most importantly it’s been fun and continues to be fun to work on.

I think the fun-to-make factor is massively underestimated as a success indicator. Working on the right product (whatever that means) that is unenjoyable is like using an amazing computer with a broken keyboard. It’s never going to work.

Sure, with any project there’s annoying stuff, but it’s the trend overall. Is the core functionality fun to work on?

In the case of Tap the core component is a notation parser, open sourced called sowhat, github dot com/tatatap-com/sowhat

That was super fun to make and learn about lexing and parsing. It’s pretty far along but there’s still a lot I’m planning to add.