Engineering lead. Building micro-products and small tools. Writing about high-performing teams, architecture, and pragmatic AI adoption.
Amsterdam, The Netherlands
Joined November 2009
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That's why I'm hyped to share launches.uicomet.com - Your one-stop shop for curated product discoveries.
Build static pages, highlight code, and sync database views.
bongo.build
Compiles Markdown and templates, bundles scripts with Rolldown and styles with LightningCSS.
diffs.com/highlights
WebAssembly syntax highlighting with Shiki-compatible output and incremental tokenization.
github.com/nyacg/pagedb
Experimental Rust database on R2, with live queries through one Durable Object.
varun retweeted
First Clef, now Clairic.
Clef picks from options you give it. Clairic extracts values from a receipt photo, a support email, or a CSV of daily counts.
You get typed answers with confidence scores in one forward pass, without generating output tokens.
Use them ahead of an LLM and you can keep the raw input away from the model writing the reply. It gets the extracted values, not the original email.
Great work by @michellechen and the Workers AI team. In preview now, with open weights coming soon.
a brand new model paradigm! introducing 𝚌𝚕𝚊𝚒𝚛𝚒𝚌: a system one model for extracting, computing, estimating, and predicting values from unstructured inputs.
blog.cloudflare.com/clairic-…
github.com/tomjohndesign/wha… has been a nice tiny tool that I reach out frequently when working with agents
varun retweeted
New review guideline from Apple
developer.apple.com/app-stor…
Things can lead to ban
- Tricking the review process or hiding dormant code
- Buying fake reviews or manipulating chart rankings
- Copying other developers' UI, icons, or brand names
Four self-hosted and privacy-first tools for retaining ownership of your stack:
rustrak (github.com/rustrak/rustrak)
Single-binary, self-hosted observability suite compatible with Sentry SDKs for errors, tracing, and logs
petal.live
Lightweight remote pair programming with selective app sharing, low-latency control, and a self-hosted relay option
pulseos.finance
Local-first personal finance platform that runs transaction categorization and natural-language ledger queries on on-device LLMs
orq.ai
LLM gateway that enforces organization policies, token spend limits, MCP controls, and full audit logs before requests leave your perimeter
varun retweeted
We just open-sourced Void!
I love many things about Void, like using Vite and deploying on Cloudflare, but my favorite is that it's built on Hono.
I've been wondering how to build full-stack apps with Hono in the AI era. Void is the answer!
blog.cloudflare.com/deploy-w…
varun retweeted
we're finally getting a company that knows how to present their benchmarks
Happy JevDay!
But before announcements we have to talk philosophy…
The needs of early adopters / tinkerers / dreamers are quite different from what is needed for extremely stable infrastructure.
For the Jev release, we erred on the latter, but this release is for the former - with a gate so people can opt-in to the danger zone!
varun retweeted
TanStack Start 1.0 is officially stable! 🎉
A full-stack web framework for React and Solid, already used to build millions of apps, from Fortune 500 companies to your favorite tools and weekend projects.
tanstack.com/start
varun retweeted
Found this gem on reddit
Merge multiple internet connections for a single download
Meet Plexo - github.com/anmolkapil/plexo/
Four infrastructure tools for moving AI agents into production
archify.si
Compiles codebases and system descriptions into interactive architecture maps directly inside coding agents (Claude Code, Cursor)
mecatl.dev
Cloud-native runtime for hosting agents on Kubernetes with permission gates, sandboxed environments, and event logs
hindsight.vectorize.io
Persistent cross-session memory service that models agent recall, facts, and observations beyond raw chat history
steel.dev
Cloud browser infrastructure providing managed Puppeteer/Playwright sessions via API for web automation
varun retweeted
It should be impossible for AI to make a bad UI.
Tell your agent today: "Install and set up github.com/gholtzap/lintappl… in this project"
varun retweeted
I built Vio, a tiny Mac dictation app powered by Cactus Compute's Needle engine
Hold ⌥Space, speak, release to paste. Super fast, with ultra-low memory use. Runs on your Mac, with no big models to download
Free and open source: github.com/apvarun/vio
varun retweeted
apvarun/vio from @apvarun
Vio is a macOS menu-bar app for local speech-to-text dictation. Hold ⌥Space, speak, and release to paste into the app you're using.
Transcription runs on your Mac's CPU with the 16.9 MB Whistle model and Needle engine, without server calls or telemetry.
github.com/apvarun/vio
I built Vio, a tiny Mac dictation app powered by Cactus Compute's Needle engine
Hold ⌥Space, speak, release to paste. Super fast, with ultra-low memory use. Runs on your Mac, with no big models to download
Free and open source: github.com/apvarun/vio
varun retweeted
How to get an app removed 101.
1. Big OTA updates.
2. Refund rate > 4%.
3. Fake discounts, abandon checkout.
4. Copycat 1:1 another app.
5. Repeated low quality submissions.
6. Privacy & data violations & MMPs.
7. Circumventing Apple fees.
8. Manipulating & fake reviews.
9. UGC with no moderation.
10. Excessive ads.
11. Excessive permissions / tracking.
All of my iOS apps were removed and the account is in pending termination.
It's been almost 3 weeks, I have contacted support about 5 times now, they say they don't have any visibility and can't help.
I have not evaded the review process.
If you have a contact at apple, I'd be very grateful.
If your account was suspended, please DM me any insights you have into what will happen.
I'll appreciate any retweets too!
@RevenueCat
varun retweeted
It has never been a tougher time to build a product which you are not personally dogfooding every single day
A few newer builder tools I came across this week:
roomote.dev
a single-tenant cloud coding agent that works from your repo and returns PRs with live previews
ledge.sh
Markdown notes where code blocks run in place, including on an SSH server
github.com/0xpili/simplified…
an LLM skill + checker for short, controlled technical docs
indexmysite.app
submit and track indexing for product, docs, and comparison pages via web app, CLI, API, or MCP
varun retweeted
Alsjeblieft allen, werkt als een zonnetje; stamppot.dev
