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Ask HN: What are you working on? (February 2025)

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351–360 of 922 posts

Re: Ask HN: What are you working on? (February 2025)

#351

I'm working on Botnet of Ares [0], an incremental hacking game where you exploit millions of devices in order to evolve a superintelligent AI. [0] https://tiniuc.com/botnet-of-ares/

This looks cool, will be following along! Were you inspired at all by Endgame: Singularity?

Not precisely, but I think my roommate in high school played that game quite a bit! If you sign up for my newsletter you'll get some info about the games that directly influenced Botnet of Ares.

Re: Ask HN: What are you working on? (February 2025)

#352

I'm a long-time FreeCAD user, and one of my annoyances is that long-running operations lock up the entire UI and can't be aborted. This is particularly annoying if you realise you made a mistake, but have no way to go back and correct it without waiting for the operation to complete first. Or you kill FreeCAD but then you don't get to save your work. So for my first contribution to FreeCAD I'm working on fixing this.…

Always awesome to see new freecad devs chiming in. Thank you for your efforts, I bet a lot of people are reading your comments and nodding in approval, waiting for freecad to enter its heyday.

Re: Ask HN: What are you working on? (February 2025)

#353

I'm working on valuation models for wholesale electricity trading of flexibility assets (batteries, basically). Currently I'm restructuring a big chunk of the code for readability, trying to apply good refactoring practices (work in small bits). After a lot of frustrating experiences with Python linear optimization DSLs, I'm thinking of writing my own at some point as a side-project :)

Awesome, I did something similar a while ago. What's your motivation? F

Re: Ask HN: What are you working on? (February 2025)

#355
Finishing off the last bugs in my free puzzle game called Kombi, before it goes live on Steam.

Made in Love2D, mostly because it's limited in its simplicity (good for creativity) while still allowing me to make something usable. That, plus I love Lua, which is how the project event got started - just me wanting to mess around with the language. From then on it quickly spiraled out of control - 2 weeks to make the core logic of the game, 2 months to create a basic UI library from scratch, just because.

Re: Ask HN: What are you working on? (February 2025)

#356
I made a Python library that can be used to simulate the combined effect of financial patterns (e.g. salary, inflation, investment gains, etc) over time so you can plan your finances better. It's currently on my GitHub and I'm looking for new things to add to it :) https://github.com/TimoKats/pylan

Re: Ask HN: What are you working on? (February 2025)

#357
I discovered the world of specialty coffee last year, fell into the rabbit hole and am now building a coffee journal and bean tracking app called Coffee Library (https://apps.apple.com/us/app/coffee-library/id6664071528?uo...).

Probably the best way to develop your taste and understand the spectrum of different coffees available is to do comparative tasting aka try a small number of coffees in parallel to compare and contrast. I was having trouble finding tasting sets so I started freezing a little portion of every coffee bag I bought to create a collection for doing these tastings at home.

I needed something to keep track of them all (as well as my tasting notes in general) so instead of using a spreadsheet I built a full app for it. The app supports NFC-tagged containers which I've found to make my workflow a whole lot easier.

I also set up an online store to sell the NFC-equipped single-dosing tubes: https://store.coffeelibrary.app Planning on adding more containers that work well with the app in the future.

Re: Ask HN: What are you working on? (February 2025)

#358
post #357

I discovered the world of specialty coffee last year, fell into the rabbit hole and am now building a coffee journal and bean tracking app called Coffee Library ( https://apps.apple.com/us/app/coffee-library/id6664071528?uo... ). Probably the best way to develop your taste and understand the spectrum of different coffees available is to do comparative tasting aka try a small number of coffees in parallel to compare a…

This is awesome. I was considering building something very similar, but great to see it already exists.

How are you building the app? The interface makes me think it's native SwiftUI?

Re: Ask HN: What are you working on? (February 2025)

#359
I'm still working on DocSpring [1], originally launched on Hacker News in October 2017 under the name "FormAPI." It's a PDF generation API with a template editor UI for setting up fields on PDF forms. It makes it easy to turn complex tax and immigration forms into simple type-safe APIs with strong validations.

I've been having a lot of fun with AI agents lately. Have tried a lot of them - Cline, Roo Code, Windsurf, and finally settled on Cursor now with Claude 3.5 sonnet. It's been a big boost for my productivity.

AI helped me write a synchronous API proxy in Go that I'm almost ready launch. One of the main challenges with Ruby on Rails is that it's terrible at handling long-lived HTTP requests. Especially a lot of them at the same time. So our PDF generation API was forced to be asynchronous and our customers need to poll for status updates (or set up webhooks.)

This new synchronous subdomain will handle all the polling logic for you, so you can just make an HTTP request, wait a few seconds (or longer), and receive a link to a PDF that's ready to download. Even with AI, it was still very difficult and took many weeks to get it right. Challenges included security, load testing, data races, concurrency, and setting up reliable, secure infrastructure with an internal load balancer. I learned a huge amount about both Go and Kubernetes. But it's almost done and I should be launching in the next day or two.

After that, I'm finally launching support for template versioning. This will allow you to pin your API requests to a published version, so you can keep making changes to a draft version without affecting production. It's long overdue so I'm excited to get this launched as well.

Also working on a side project from time to time: VisualCI [2]. We have a lot of PDF integration tests that use image diffs, and some browser tests where I compare screenshots. So this is a tool I've wanted for a long time, and the paid services I've found can be a bit pricy. I'm going to try to build a very simple MVP that just does what we need, and maybe others will find it useful too.

[1] https://docspring.com

[2] https://visualci.com

Re: Ask HN: What are you working on? (February 2025)

#360

I'm building a tool for uni students to study more effectively and have less stress for their exams. This is done with the study techniques retrieval practice(practising remembering to make recall easier, spaced repetition(schedule reviews for long term memorization, concrete examples. Most of this is done with ai generated flashcards and simple ai explanations. This week I will finish the exam generation feature. ht…

Looks cool! Any luck finding paying customers yet?
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