Options market-making. I trained a custom volatility model on historical data, built a passive delta hedge MM, render a synthetic underlying price from many market data sources, and a number of other interesting elements. It has been really fun to get back to my trading systems roots after 12 years as a startup CTO selling to enterprise clients and managing teams and managers. Now I just manage a bunch of Fable and Opus claude code sessions and a handful of high-performance servers. Opus makes a lot of ignorant mistakes and then explains them in great detail, but if I spend lots of time in Plan mode and then bash my head against the wall enough, we get there. Fable mostly gets it right and communicates effectively; what a relief! Still need to give Astra a try. I still feel ahead of the models on context, but am getting outpaced in many other ways. It's a very fun collaboration!
Ask HN: What are you working on? (September 2026)
971–980 of 1001 posts
Re: Ask HN: What are you working on? (September 2026)
#972Me and my wife (then my girlfriend) have written "realistic" space sci-fi in Finnish for over 20 years. Now with AI we are finally able to translate our stories to English. The quality starts to be there. There are a lot of small languages in the world, and translation used to be extremely expensive. And there is never too much good space sci-fi. (We don't write space battles or wars. Our style is slower and bit more…
Have you published any of these stories online? I'd love to read some!
Things are kind of under construction...
We would like to publish our stories in book-on-demand format.
This is one of our early translation tests. I publish it here for a while for you: https://media.nimbus.fi/tero/for_hackernews/sleeping_childre... Please don't expect it to stay there forever.
It has the same heroine that is in our debut book: https://fi.wikipedia.org/wiki/Nimbus_ja_t%C3%A4hdet Every short story has the same main characters visiting an another star and an another world.
Here's some of the local space that I generated from Gliese/Hipparcos dataset some 20 years ago. I'm trying to port our original LightWave starmaps to Blender: https://media.nimbus.fi/tero/nimbus/local_space.png
We should probably write a blog (blag) post about the hurdles of translating from a small (and not so well supported language) to English. Luckily my wife is way better in English than I am.
Re: Ask HN: What are you working on? (September 2026)
#973https://meet.rank.rocks - a climbing app that uses Elo-like rating system for ranking climbers and determining route difficulty. And it’s totally free & open - anyone can add gyms, crag, create competition events, etc.
Re: Ask HN: What are you working on? (September 2026)
#974I've been working on a voxel game engine called Bonsai for ~10 years. Probably the most interesting thing about it at the moment is the editor. The world, and most things in it, are represented as collections of SDFs. More accurately, they're density fields, but, potato-tomato. Bonsai has undergone a large rewrite over the last couple years that's nearing completion. A world edit is defined as a bunch of SDF paramete…
The draw distance thing is insane. I would love to see some ridiculously scary-huge landscapes!!
Re: Ask HN: What are you working on? (September 2026)
#975Greetings friends! I have been joyfully working on a native iOS app called Sanctum. I really built this for myself and use it multiple times a day (https://apps.apple.com/us/app/sanctum-the-voice-journal/id67...)
Sanctum is a voice journal, think Obsidian but for voice notes. I am really honing in on data sovereignty, privacy, 1 click to record and self organization of notes / ideas.
While this isn't anything revolutionary, or technically difficult, I do think I've landed on a form factor and stack that is in my opinion not served by current products. So much so that I just simply had to build it myself. Sanctum was born out of an Obsidian plugin that I built and have been maintaining for about 2 years called Scribe and it's been a wonderful way to really hone in on a more full fledged agentic development process for a full stack experience.
The stack is simple
- For transcription I am using AssemblyAI - they have solid terms, 24hr retention and no training
- LLM inference is running inside a TEE using redpill.ai, it's slow af but as private as I could find.
- For cloud backup I am using full E2E encryption with Backblaze for storage
- Endpoints and the like are AWS lambdas, DynamoDB for billing storage, Supabase for auth
Anyway, something I am most definitely curious on is if people are recording their thoughts, what they are using (either a cobbled together solution or a product) and what value they feel they've been getting from it!
Re: Ask HN: What are you working on? (September 2026)
#976[dead]
Re: Ask HN: What are you working on? (September 2026)
#977projects per year in "Ask HN: What are you working on?" year projects avg/month ---- -------- --------- 2008 123 10.2 2009 104 8.7 2010 666 55.5 2011 86 7.2 2012 46 3.8 2013 389 32.4 2014 146 12.2 2015 104 8.7 2016 471 39.2 2017 456 38.0 2018 242 20.2 2019 246 20.5 2020 882 73.5 2021 837 69.8 2022 363 30.2 2023 425 35.4 2024 2122 176.8 2025 6220 518.3 2026 6093 677.0 (Jan-Sep) Top five topics per year (% of that year…
What's interesting (and kind of sad) here is that while AI drastically increased product count, more than 50% are now composed of dev tools and AI Some kind of golden shovels situation. I wish there were more games, personal apps, and open hardware – more fun stuff that became affordable due to AI
If you think about and use AI all the time, you’ll inevitably think of AI projects. Like that website indiehackers is mostly filled with ideas that market to other indiehackers
Re: Ask HN: What are you working on? (September 2026)
#978Re: Ask HN: What are you working on? (September 2026)
#979https://shopspec.io/ ShopSpec is a deterministic parametric furniture generator (bookshelves, cabinets, shop carts, leg-and-rail frames, multi-carcass composites) that encodes real woodworking intelligence and outputs shop-ready artifacts. Most recently, introduced the concept of value engineering by sweeping across dimensions to batch evaluate candidates that ranks based on sheet purchases. Also have in beta an MCP…
This is amazing, I may use it for a built-in pantry i'm planning to build. In my use case, I end up with one side at an angle, is there a way to support that?
In a recent project the countertop contractor digitally measured the walls, even ones that look square weren't, not a 90 degree corner to be found! You should build cabinets as squared boxes and level them when installing. The trim work that surrounds it will hide gaps, etc.
Generally if there is space because of odd angled walls there really isn't any advantage to trying to use it. You're talking square inches of drawer/cabinet space, it really doesn't matter as far as usable space is concerned. Its a huge hassle to try and build cabinets that are not square - things like how do you screw/nail parts and not have the screw/nail blow out a finished side? It can be done, but should it?
Re: Ask HN: What are you working on? (September 2026)
#980Simple recommendation app that asks 10+ AI models for the top options for whatever you’re looking for, and it pools the results to give you the overall top three: https://top3.best/ I mainly built it to explore which areas have model consensus and which have diversity of opinion.
I've wanted something like this! Thanks