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David Callies

@dcallies.bsky.social
67 followers 41 following 58 posts

Open Source Trust & Safety Software Engineer

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Reposted by David Callies
austin (e/accordion 🪗) @thebadcode.com · 24/07/2026
that’s just unsolvedslop. you only like it because its pressing outward against the boundaries of human knowledge
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David Callies @dcallies.bsky.social · 14/05/2026
Everyone knows what they say about he who fights with monsters, but I desperately need to know the fate of he who fights with robots. For a friend.
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Reposted by David Callies
Emelia @thisismissem.social · 04/05/2026
Okay so – with a big caveat that we still need to write a lot more documentation – between the @roost.tools team, @dcallies.bsky.social and myself we've managed to ship a new documentation site for ThreatExchange / HMA: facebook.github.io/ThreatExchan...
facebook.github.io
ThreatExchange
Trust & Safety tools for working together to fight digital harms.
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David Callies @dcallies.bsky.social · 28/01/2026
Stumbling onto Hubrid's "Cosmic Punk" album has been the first Spotify algorithm W for me in 2026.
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Reposted by David Callies
Bluesky Safety @safety.bsky.app · 25/11/2025
We're announcing a new partnership with StopNCII.org to prevent non-consensual intimate imagery (NCII) from spreading on Bluesky. While NCII hasn't been frequent on our platform, these incidents are devastating for victims and preventing them is a top safety priority. 1/4
stopncii.org
Stop Non-Consensual Intimate Image Abuse | StopNCII.org
StopNCII.org is operated by the Revenge Porn Helpline which is part of SWGfL, a charity that believes that all should benefit from technology, free from harm.
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Reposted by David Callies
Juliet Shen @julietshen.online · 29/10/2025
🚨 IT'S FINALLY PUBLIC 🚨 I am very, very, very proud of this launch and am so excited to finally share it with everyone! @roost.tools has worked with OpenAI over the past few months to open source a reasoning model that is fine-tuned for Trust & Safety use cases.
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Reposted by David Callies
hailey @hailey.at · 10/04/2025
turns out that with facebook's pdq hashing algorithm, you can hash every image that goes through the firehose. minimal cpu required. fun stuff! then just throw pgvector on top and boom
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David Callies @dcallies.bsky.social · 19/02/2025
I accidentally wandered into owning facebook/ThreatExchange and feel like an imposter, but these last few months we've had the most external contributors that I can remember. I opened #1761 with the intent of doing it myself, but before I started someone else put up a PR. I think this is good?
github.com
[hma] Add the ability to GET the signals from a content_id · Issue #1761 · facebook/ThreatExchange
Problem to solve: After getting a match hit, we want to inspect the actual hash that we matched. However, you can't get, we only have the content_id Getting signal_type requires an extra query on t...
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Reposted by David Callies
Juliet Shen @julietshen.online · 10/02/2025
gotta give a shoutout to HMA (hasher-matcher-actioner, aka Open Media Match) developed by great folks like @dcallies.bsky.social that built an open source safety foundation to grow! Everyone benefits from having access to this kind of technology and a rising tide WILL lift us all.
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David Callies @dcallies.bsky.social · 11/12/2024
Oh noes! All of my forms of communication share common failure points! Even WhatsApp has failed me. Wife: "Are we just going to have to shout at each other?" Me: "Yes, as the cavemen did."
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David Callies @dcallies.bsky.social · 17/11/2024
Hello world! I've made a halfhearted attempt in the last year to use threads - www.threads.net/@dcallies, so I've created a new social media account to make a halfhearted attempt to use that too!
threads.net
David Callies (@dcallies) • Threads, Say more
108 Followers • 3 Threads • I work on making the internet safer by enabling platforms and non-profits to work together to fight harm. See the latest conversations with @dcallies.
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