William Saar Profile
William Saar

@saarw

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Freelancer | Backend and data engineering for Spotify and Candy Crush, helped build SF-based appsec startup, financial trading tech @javamissionctrl

Stockholm + Remote
Joined October 2012
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@saarw
William Saar
1 month
Sovereign Al is a hot topic, so I built a RAG agent that lets you compare OpenAl's GPT-4o Mini with models you can host yourself in a simulated recruitment agency scenario. Try the demo and reach out if you need to build Al or data engineering solutions!.
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@saarw
William Saar
1 day
Good summary of how LLM providers approach training data.
@davisblalock
Davis Blalock
2 days
While I briefly have no employer, let me tell you what's really happening with AI companies training on public data: [1/n].
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@saarw
William Saar
1 day
Interesting paper from Nvidia on why a selection of small language models may be better than large generalist models for agentic systems. Also provides a road map for extracting small model subsystems from agents relying on large models.
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@saarw
William Saar
4 days
Great to see mass-market software migrating to memory-safe languages.
@fb_engineering
Engineering at Meta
4 days
Ever wondered what it takes to modernize systems at massive scale? Tune in to the latest Meta Tech Podcast where we discuss a bold project to rewrite decades-old C code in Rust and how it will transform a central messaging library shared across Messenger, Facebook, Instagram, and
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@saarw
William Saar
4 days
Interesting learnings on building AI agents for the enterprise market.
@BrendanFalk
Brendan Falk
5 days
Over the last 3.5 months, we've worked very closely with many Global 2000 ($5B+ revenue) companies and deployed several custom AI agents. Here are the most unexpected learnings:.
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@saarw
William Saar
5 days
RT @dbreunig: As your context bloats, you hit different failure modes. These failures hit agents hardest because they operate in exactly t….
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@saarw
William Saar
6 days
AI can drive massive developer demand in Europe once governments figure out that its now feasable to build and replace foreign-controlled software. Past attempts to adopt Linux stalled, but AI-development means it's a lot cheaper to address gaps and build homegrown solutions.
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@saarw
William Saar
7 days
Android needs an app permission for audio. Some apps interrupt audio playback of other apps even when the app itself isn't playing any sounds. Bet they would behave better if users could revoke their audio permissions.
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@saarw
William Saar
9 days
Good overview of the state of the streaming data ecosystem. Reach out if you need help building data pipelines with Kafka, Flink, or Google Dataflow! . (or maybe one of the newer contenders?).
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@saarw
William Saar
10 days
Good summary of some of the problems apps that use LLMs need to manage.
@karpathy
Andrej Karpathy
10 days
+1 for "context engineering" over "prompt engineering". People associate prompts with short task descriptions you'd give an LLM in your day-to-day use. When in every industrial-strength LLM app, context engineering is the delicate art and science of filling the context window.
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@saarw
William Saar
10 days
Seeing Claude Code search the web to work on a task and wondering how sustainable that is as AI chats increasingly replace web searches.
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@saarw
William Saar
11 days
Good article on why you may want MCP as a layer over your APIs for use by AI assistants. My tool SpecToMCP helps you get started by generating MCP servers from API specs
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@saarw
William Saar
14 days
RT @_avichawla: Finally! A RAG over code solution that actually works (open-source). Naive chunking used in RAG isn't suited for code. Th….
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@saarw
William Saar
15 days
Big fan of Cursor, but VS Code isn't the best IDE and there seems to be better code AIs out there. Going to give Intellij IDE with Claude Code a shot to see if better disparate components can compete with Cursor's integration advantages.
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@saarw
William Saar
18 days
At the Nordics kickoff for the Agentics Foundation to track what's new with AI agents
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@saarw
William Saar
19 days
Started the same cross-platform desktop app with a UI that integrates a native lib in 3 different GUI frameworks and can't say I'm convinced by the dev experience, perf, future support, and maintainability of any of them. Might dig up JavaFX to see what it looks like these days.
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@saarw
William Saar
20 days
RT @BdKozlovski: With a (one-time) budget of ~$42,000, you can configure a 3-broker Kafka cluster with HW capable of 56 GB/s of sequential….
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@saarw
William Saar
20 days
AI being good at UI dev but bad at environment setup might lead to a new kind of cross-platform development. Frameworks like React Native require more environment setup, so it makes sense with UI specs that AI can build using native UI kits with Rust libs for shared functionality.
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@saarw
William Saar
21 days
@QwQiao
qw
22 days
news of walmart and amazon exploring stable coins made visa mastercard paypal go down 5%
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@saarw
William Saar
21 days
Languages that prevent or force handling of null pointers in the type system do provide meaningful stability improvements.
@copyconstruct
Cindy Sridharan
21 days
Full report for yesterday’s Google outage. - not feature flagging a new code path.- null pointer crashing a binary when reading empty fields from Spanner.- remediation causing a thundering herd as there was no exponential backoff.- which required manual throttling to recover from
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@saarw
William Saar
22 days
RT @simonw: Anyone building "agentic" systems on top of LLMs needs to take this principle into account every time they design or implement….
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