StefanJVA
@stefanjva.bsky.social
8+ years building enterprise software (Airbus, Red Bull, Eventim).
ML engineer since 2020.
Quit my job to live my dream as an indie hacker
ML engineer since 2020.
Quit my job to live my dream as an indie hacker
I often get lost in researching something and how to do it in the best possible way instead of just doing it.
Anyone else has this Problem? What can we do against it?
Anyone else has this Problem? What can we do against it?
January 17, 2026 at 5:46 PM
I often get lost in researching something and how to do it in the best possible way instead of just doing it.
Anyone else has this Problem? What can we do against it?
Anyone else has this Problem? What can we do against it?
"Premature optimization is the root of all evil" - Donald Knuth
Stop optimizing code that doesn't exist yet.
Stop perfecting features nobody asked for.
Stop building infrastructure for scale you don't have.
Build it. Ship it. See if anyone cares. THEN optimize.
Stop optimizing code that doesn't exist yet.
Stop perfecting features nobody asked for.
Stop building infrastructure for scale you don't have.
Build it. Ship it. See if anyone cares. THEN optimize.
January 16, 2026 at 6:16 PM
"Premature optimization is the root of all evil" - Donald Knuth
Stop optimizing code that doesn't exist yet.
Stop perfecting features nobody asked for.
Stop building infrastructure for scale you don't have.
Build it. Ship it. See if anyone cares. THEN optimize.
Stop optimizing code that doesn't exist yet.
Stop perfecting features nobody asked for.
Stop building infrastructure for scale you don't have.
Build it. Ship it. See if anyone cares. THEN optimize.
gpt-oss-120b is so insanely cheap and fast...
January 15, 2026 at 6:53 PM
gpt-oss-120b is so insanely cheap and fast...
Standard keyboards are hilariously unergonomic:
Your strongest fingers (thumbs) share ONE key while your weakest (pinkies) constantly stretch for Shift, Ctrl, Tab...
Spent months on custom layouts. Now I'm back to normal.
Lesson: muscle memory > perfect layout
Your strongest fingers (thumbs) share ONE key while your weakest (pinkies) constantly stretch for Shift, Ctrl, Tab...
Spent months on custom layouts. Now I'm back to normal.
Lesson: muscle memory > perfect layout
January 14, 2026 at 5:20 PM
Standard keyboards are hilariously unergonomic:
Your strongest fingers (thumbs) share ONE key while your weakest (pinkies) constantly stretch for Shift, Ctrl, Tab...
Spent months on custom layouts. Now I'm back to normal.
Lesson: muscle memory > perfect layout
Your strongest fingers (thumbs) share ONE key while your weakest (pinkies) constantly stretch for Shift, Ctrl, Tab...
Spent months on custom layouts. Now I'm back to normal.
Lesson: muscle memory > perfect layout
How I Use AI to Learn from Experienced Programmers :
Find high-quality open source projects → clone in Cursor → ask AI to break down the architecture
Then drill into specific implementations and design decisions
Keep projects in separate windows. Forces you to understand what you're learning
Find high-quality open source projects → clone in Cursor → ask AI to break down the architecture
Then drill into specific implementations and design decisions
Keep projects in separate windows. Forces you to understand what you're learning
January 13, 2026 at 6:39 PM
How I Use AI to Learn from Experienced Programmers :
Find high-quality open source projects → clone in Cursor → ask AI to break down the architecture
Then drill into specific implementations and design decisions
Keep projects in separate windows. Forces you to understand what you're learning
Find high-quality open source projects → clone in Cursor → ask AI to break down the architecture
Then drill into specific implementations and design decisions
Keep projects in separate windows. Forces you to understand what you're learning
Coding Tipp #3: If you want to create a awesome peace of software, write it twice
January 12, 2026 at 5:21 PM
Coding Tipp #3: If you want to create a awesome peace of software, write it twice
Probably an unpopular opinion, but i think that Vim key bindings still rock.
I think i would not recommend anyone to learn them these days because AI can edit the code 100x faster anyway. But since i build the muscle memory ages ago i will probably use them till the day i die.
I think i would not recommend anyone to learn them these days because AI can edit the code 100x faster anyway. But since i build the muscle memory ages ago i will probably use them till the day i die.
January 10, 2026 at 5:46 PM
Probably an unpopular opinion, but i think that Vim key bindings still rock.
I think i would not recommend anyone to learn them these days because AI can edit the code 100x faster anyway. But since i build the muscle memory ages ago i will probably use them till the day i die.
I think i would not recommend anyone to learn them these days because AI can edit the code 100x faster anyway. But since i build the muscle memory ages ago i will probably use them till the day i die.
Coding Tipp #2: If you have to use comments in your code -> refactor it until you don't
January 10, 2026 at 2:16 AM
Coding Tipp #2: If you have to use comments in your code -> refactor it until you don't
Lots of people are switching to TanStack Start recently. Anyone has experience with it? Is it worth checking out?
January 9, 2026 at 4:53 AM
Lots of people are switching to TanStack Start recently. Anyone has experience with it? Is it worth checking out?
Hot Take: If your SaaS has no dark mode, i will be much less likely to use it
January 8, 2026 at 4:20 AM
Hot Take: If your SaaS has no dark mode, i will be much less likely to use it
When you are coding with AI its extremely helpful to give the models a way to check if the code is working out or not.
Example:
Example:
December 26, 2025 at 5:16 PM
When you are coding with AI its extremely helpful to give the models a way to check if the code is working out or not.
Example:
Example:
Never tracked user engagement before. Evaluated a few solutions and settled on PostHog.
Session replay is cool. You can watch exactly what users did on your site. Plus heatmaps, error tracking, LLM tracking, and anonymous cookie-less tracking.
Session replay is cool. You can watch exactly what users did on your site. Plus heatmaps, error tracking, LLM tracking, and anonymous cookie-less tracking.
December 25, 2025 at 7:53 PM
Never tracked user engagement before. Evaluated a few solutions and settled on PostHog.
Session replay is cool. You can watch exactly what users did on your site. Plus heatmaps, error tracking, LLM tracking, and anonymous cookie-less tracking.
Session replay is cool. You can watch exactly what users did on your site. Plus heatmaps, error tracking, LLM tracking, and anonymous cookie-less tracking.
Coding tipp #1: Simple code always wins.
December 24, 2025 at 7:20 PM
Coding tipp #1: Simple code always wins.
I built this cool looking animation for my landing page. Didn't know how easy and fast this is.
December 23, 2025 at 6:39 PM
I built this cool looking animation for my landing page. Didn't know how easy and fast this is.
Life hack for cheap people: min-max all the free AI tiers.
Chat: ChatGPT, Claude, Mistral, Gemini, Perplexity
Code: Codestral, v0, Bolt, Lovable
Is it ridiculous? Yes. Does it work? Also yes. 🤫
Chat: ChatGPT, Claude, Mistral, Gemini, Perplexity
Code: Codestral, v0, Bolt, Lovable
Is it ridiculous? Yes. Does it work? Also yes. 🤫
December 22, 2025 at 6:21 PM
Life hack for cheap people: min-max all the free AI tiers.
Chat: ChatGPT, Claude, Mistral, Gemini, Perplexity
Code: Codestral, v0, Bolt, Lovable
Is it ridiculous? Yes. Does it work? Also yes. 🤫
Chat: ChatGPT, Claude, Mistral, Gemini, Perplexity
Code: Codestral, v0, Bolt, Lovable
Is it ridiculous? Yes. Does it work? Also yes. 🤫
Why is no one talking about boring stuff like paying taxes, dealing with legal stuff etc?
December 21, 2025 at 11:37 AM
Why is no one talking about boring stuff like paying taxes, dealing with legal stuff etc?
People with successful business are often big on X. But What comes first?
Are they big on X because they have business success?
Or do they have business success because they are big on X?
Are they big on X because they have business success?
Or do they have business success because they are big on X?
December 20, 2025 at 8:46 AM
People with successful business are often big on X. But What comes first?
Are they big on X because they have business success?
Or do they have business success because they are big on X?
Are they big on X because they have business success?
Or do they have business success because they are big on X?
Over the past month, I compared the Cursor and Antigravity
Verdict: No big differences. Both are essentially just VSCode clones with AI features.
Antigravity has free credits. That's probably its biggest advantage.
However Cursor seems a bit more mature and offers more models.
Verdict: No big differences. Both are essentially just VSCode clones with AI features.
Antigravity has free credits. That's probably its biggest advantage.
However Cursor seems a bit more mature and offers more models.
December 19, 2025 at 7:16 PM
Over the past month, I compared the Cursor and Antigravity
Verdict: No big differences. Both are essentially just VSCode clones with AI features.
Antigravity has free credits. That's probably its biggest advantage.
However Cursor seems a bit more mature and offers more models.
Verdict: No big differences. Both are essentially just VSCode clones with AI features.
Antigravity has free credits. That's probably its biggest advantage.
However Cursor seems a bit more mature and offers more models.
The best way to learn how to code:
1. Find something you genuinely want to build
2. Start coding immediately
3. If you hit something you don't understand: Search for a tutorial or discuss with you favorite LLM. Take your time to learn/understand it. Go back to 2. instantly.
1. Find something you genuinely want to build
2. Start coding immediately
3. If you hit something you don't understand: Search for a tutorial or discuss with you favorite LLM. Take your time to learn/understand it. Go back to 2. instantly.
December 19, 2025 at 5:16 PM
The best way to learn how to code:
1. Find something you genuinely want to build
2. Start coding immediately
3. If you hit something you don't understand: Search for a tutorial or discuss with you favorite LLM. Take your time to learn/understand it. Go back to 2. instantly.
1. Find something you genuinely want to build
2. Start coding immediately
3. If you hit something you don't understand: Search for a tutorial or discuss with you favorite LLM. Take your time to learn/understand it. Go back to 2. instantly.
git checkout -b "feature/say-thank-you"
git push --set-upstream bsky "feature/say-thank-you"
git push --set-upstream bsky "feature/say-thank-you"
December 19, 2025 at 11:33 AM
git checkout -b "feature/say-thank-you"
git push --set-upstream bsky "feature/say-thank-you"
git push --set-upstream bsky "feature/say-thank-you"
I build a calendar agent with full read/write access to all connected events.
But how to continue? It can do almost anything:
- Retroactively fill timesheet for invoices
- Plan future events
- Summarize month, compare weeks, find inconsistencies, etc
But how to continue? It can do almost anything:
- Retroactively fill timesheet for invoices
- Plan future events
- Summarize month, compare weeks, find inconsistencies, etc
December 19, 2025 at 11:24 AM
I build a calendar agent with full read/write access to all connected events.
But how to continue? It can do almost anything:
- Retroactively fill timesheet for invoices
- Plan future events
- Summarize month, compare weeks, find inconsistencies, etc
But how to continue? It can do almost anything:
- Retroactively fill timesheet for invoices
- Plan future events
- Summarize month, compare weeks, find inconsistencies, etc
Hi all at bluesky 👋
December 19, 2025 at 11:21 AM
Hi all at bluesky 👋