Mark Harwood @elasticmark
Ex @elastic. Search guy. Currently working on @andorsearch m.youtube.com/channel/UC_Ci-… Joined January 2014-
Tweets2K
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Followers1K
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Following353
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Likes3K
Blue skies and bowls
Hey @ionos_help_uk - why are you charging long-term customers like me more than double that of new customers for the same server and terms? This kind of “loyalty penalty” is banned now in some industries. Is charging the same rate too much to ask?
Significant term identification. Clustering. Pure JavaScript working with a simple json file of news headlines.
Honoured to join the lineup of search experts interviewed in this series. We talk myths, “OR is mORe,” and how vectors should be treated like plasticine, not porcelain. Thanks Itamar and Zevi! pulse.support/top-voices/mar…
My talk on “emergent facets” at this week’s Search and AI Meetup youtu.be/U1RGTMesCq0
A fragrance of sorts…
Couple of @GoPro stills from today.
Only a week to go until the next London Search & AI Meetup and we're filling up! Come along and hear @elasticmark and Kapil Kumar (Roko) talk about Emergent Facets & Improving Search Relevance Using CrossEncoders and LLMs meetup.com/search-and-ai-…
Very happy to announce that the always entertaining @elasticmark will be our second speaker at the London Search & AI Meetup on July 1st: "Emergent Facets: Generating Specialized Filters from Search Results" - sign up today! meetup.com/search-and-ai-…
We're back with another London Search & AI Meetup on 1st July at Just Eat! meetup.com/search-and-ai-… Our first talk is from Kapil Kumar of Roku on "Improving Search Relevance Using CrossEncoders and LLMs"- 2nd talk to be announced soon. We'll also have time for Q&A and networking
Tag, drag, discover: How LLMs can create useful, instant filters from raw text youtu.be/mQPKLciQIHU
I wanted to share what I learned from Tantivy's "Search Benchmark, the Game", so I set up GitHub pages and wrote two blogs, on general observations on the benchmark jpountz.github.io/2025/05/12/ana… and how it helped drive performance improvements in Lucene jpountz.github.io/2025/04/12/why…
A genuine work email I received one time: “Company policy requires you to undertake security training. To take the course visit [site I’d never heard of] and install the browser plugin.” I replied “No. Did I pass?”

David Pilato 🇺🇦... @dadoonet
6K Followers 2K Following developer | evangelist @elastic 📧 DM opened. DJ 4 times a year, just for fun! 🎧 https://t.co/1OtWJ8PzAy
Jo Kristian Bergum @jobergum
19K Followers 1K Following CEO https://t.co/sYmUNgPBq8 - The retrieval engine for agents.
Philipp Krenn @xeraa
5K Followers 726 Following 🎩 of DevRel & Developer 🥑 @elastic Tweets about Elasticsearch, Kibana, search, observability, security — optimized for relevance DMs are open
Elastic @elastic
64K Followers 177 Following Elastic is The Search AI Company. We bring together the precision of search and the intelligence of AI to accelerate results that matter.
Charlie Hull @FlaxSearch
2K Followers 837 Following The Search Juggler: helping you build amazing AI & search apps. Also hachyderm dot io slash @flaxsearch & @thesearchjuggler.bsky.socialDoug Turnbull @softwaredoug
4K Followers 778 Following Search at Daydream; ex @Reddit, @Shopify & @o19s; Books: Relevant Search & AI Powered Search Find me at 🦋
Dave Snider @enemykite
20K Followers 537 Following System design @xata. Alum of @elastic, @giantbomb. Mastodon: https://t.co/Vj3WQq0LOb Bsky: https://t.co/oGsWhxyanG
Tudor Golubenco @tudor_g
1K Followers 945 Following CTO @xata, Postgres at scale. Ex-@elastic and co-founder @packetbeat. Dadops. He/him.
Elizabet Oliveira �... @elizabet_dev
7K Followers 800 Following A designer who codes aka Design Engineer @clickhouseDB. Mostly posting at https://t.co/jNgtETPdO0
Mark Walkom @warkolm
1K Followers 628 Following open source, gardening, bbq, metal, rfs. https://t.co/sBkMnjtiLI, https://t.co/fSIS2Tbgm6 wiradjuri country
tylerhannan @tylerhannan
2K Followers 2K Following Distributed Systems. Music. ClickHouse formerly Macrometa, Hasura, Fauna, Elastic, Basho, etc. Ik woon in Amsterdam.
Dmitry Kan @DmitryKan
1K Followers 694 Following Host of Vector Podcast: https://t.co/XuA7zOLP97 Director of Search, @aiven_io
popuku @popuku777
0 Followers 23 Following
Ruth mary @Ruthmary135635
25 Followers 601 Following
LYDIA BRIAN @lydiabrian70
1 Followers 276 Following Strong, soft, and beautifully ❤️🔥TRANS 🏳️⚧️ ⚧️ Glowing in my authenticity this is me, and I love her 😍 follow me back here old account got hacked
Allele Security Intel... @alleleintel
735 Followers 664 Following Allele Security Intelligence is an independent company specializing in Information Security research.
@Ashton White @Whitbackup1
5 Followers 153 Following
Bhut @Age_Corn
79 Followers 1K Following Data skeptic data scientist.Normcore ML.LP Enthusiast.Retweets not necessarily agreement.
Ashley Montana @ashmontana63630
8 Followers 201 Following
Elon @Elon189700
60 Followers 2K Following
Puck! @puhcko
3K Followers 2K Following Hekas Hekas Este Bebeloi. I am an information superpredator.
Joel Washington @joelwashington
1K Followers 5K Following Founder, Modern Talent (tech talent recruiting), Zero/Level (sold, ~$50m), Shift (went public, hit $1b rev & valuation). Fmr Pres., Belong SPAC (NASDAQ:BLNG)
Scaleborg @scaleborg
5 Followers 421 Following
Ayushman chahar @wokeAyu7717
23 Followers 691 Following
Steve Chambers @4thWaveStevie
2K Followers 2K Following Workflow automation with app building and generative AI. Also a commercial driver in a bib.
Doc @ChristianSomora
65 Followers 699 Following
John Mark @jmsuhy
334 Followers 781 Following software developer / enterprise architect, free software advocate, entrepreneur, and amateur angler. foss - founder of DozerDB, co-founder of ONgDB
S◎lanaSummer @solana_summer
39 Followers 2K Following
Sarth (Noise | Groove... @noisegroove
503 Followers 489 Following Composer and Builder of the Burlap App - Continuum Fingerboard, Kyma, Ableton Live - Lou Reed, Metallica, Robert Wilson, Lucibel Crater
Sren @sren1337
20 Followers 205 Following
jason liu @jxnlco
43K Followers 2K Following independent ai consultant, a16z scout, creator of instructor prev. @stitchfix @meta
Tim @Tim68095872
12 Followers 460 Following
A Thing for Code @AThingforCode
15 Followers 479 Following Software Engineer, Java Cheerleader I tweet in Indonesian and English
Susan Stones @susanstones79
2 Followers 107 Following private life🤫 free to air, loving person, easy going, love nature and I'm open to learn new things 💯
Harry Eron @HarryEron
21 Followers 42 Following
Taylor Pass @PassT10935m
653 Followers 3K Following
Braveen @BraveenX
0 Followers 19 Following Software Dev | Building with AI & Python | Startups & Side Projects | Sharing code, thoughts & coffee-fueled builds
Josh Devins @joshdevins
504 Followers 229 Following Father, Software Engineer, ML and data type. Long COVID since Dec 2021.
Searchplex @searchplex
32 Followers 88 Following Searchplex specializes in Search Technology and AI consulting. We offer comprehensive services tailored to businesses that rely on search technology.
Bryon Kucharski @bryonkuchML
116 Followers 894 Following Search & LLMs at @Gartner_inc | MS from @manningcics | BS from @WITEngineering
Emily J @Emily91231
382 Followers 6K Following
Qavi Tech @qavitech
18 Followers 34 Following We are group of professionals who realizes the importance of relevant search and performance for online businesses. We help our clients improve their search and
Isla Bella @Isla100036
105 Followers 3K Following Wanderlust soul, Sincere Heart and a Genuine Smile
Emily @Emily57857821
451 Followers 270 Following Beauty is not just about appearance, but also a reflection of inner confidence and health.
🇺🇸Margaret🇺�... @Margaret_Brin
3K Followers 6K Following 🚫Bots 🚫Porn 🚫Crypto 🚫Shopping cards Enjoyed my entire time in CA! Speaking mechanically (self-mockingly)
Scarlett Johnsson @ScarlettJo57908
5 Followers 332 Following actress and singer lifestyle Lover of all
Xocu @franchxa1
208 Followers 4K Following LA FILANTROPIA és LA CRIDA🕊️🦉🪽 ἀγάπη 😘โปรดติดตามตอนต่อไป Que vol dir amor segona 🧬
ethan steininger 🔎 @ethansteininger
640 Followers 1K Following indexing the world @mixpeek • prev search @mongodb • likely outside • tikkun olam
Ash Varsani @ash1234v
296 Followers 4K Following
David Pilato 🇺🇦... @dadoonet
6K Followers 2K Following developer | evangelist @elastic 📧 DM opened. DJ 4 times a year, just for fun! 🎧 https://t.co/1OtWJ8PzAy
Jo Kristian Bergum @jobergum
19K Followers 1K Following CEO https://t.co/sYmUNgPBq8 - The retrieval engine for agents.
Elastic @elastic
64K Followers 177 Following Elastic is The Search AI Company. We bring together the precision of search and the intelligence of AI to accelerate results that matter.
Erik Bernhardsson @bernhardsson
47K Followers 3K Following Building @modal when I'm not posting banger stuff about infra and AI
Charlie Hull @FlaxSearch
2K Followers 837 Following The Search Juggler: helping you build amazing AI & search apps. Also hachyderm dot io slash @flaxsearch & @thesearchjuggler.bsky.socialDoug Turnbull @softwaredoug
4K Followers 778 Following Search at Daydream; ex @Reddit, @Shopify & @o19s; Books: Relevant Search & AI Powered Search Find me at 🦋
@berlinbuzzwords@flos... @berlinbuzzwords
3K Followers 778 Following A conference on storing, processing, streaming, and searching large amounts of digital data | #bbuzz | June 09-11, 2024 | @[email protected]
Elizabet Oliveira �... @elizabet_dev
7K Followers 800 Following A designer who codes aka Design Engineer @clickhouseDB. Mostly posting at https://t.co/jNgtETPdO0
Mark Walkom @warkolm
1K Followers 628 Following open source, gardening, bbq, metal, rfs. https://t.co/sBkMnjtiLI, https://t.co/fSIS2Tbgm6 wiradjuri country
ted_dunning - @bsky.t... @ted_dunning
9K Followers 215 Following Member of Apache Software Foundation, committer on many projects, Fellow at HPE. I am headed off to find some blue sky come find me at @bsky.tdunning.com
tylerhannan @tylerhannan
2K Followers 2K Following Distributed Systems. Music. ClickHouse formerly Macrometa, Hasura, Fauna, Elastic, Basho, etc. Ik woon in Amsterdam.
OpenSearchProj @OpenSearchProj
2K Followers 268 Following OpenSearch is a community-driven, open source search and analytics suite. Join the conversations at: https://t.co/8yvpGCdtPJ
Dmitry Kan @DmitryKan
1K Followers 694 Following Host of Vector Podcast: https://t.co/XuA7zOLP97 Director of Search, @aiven_io
Avi Chawla @_avichawla
51K Followers 142 Following Daily tutorials and insights on DS, ML, LLMs, and RAGs • Co-founder @dailydoseofds_ • IIT Varanasi • ex-AI Engineer @ MastercardAI
Better Auth @better_auth
13K Followers 0 Following The most comprehensive authentication framework for TypeScript.
Josh Devins @joshdevins
504 Followers 229 Following Father, Software Engineer, ML and data type. Long COVID since Dec 2021.
Clerk @ClerkDev
30K Followers 130 Following Clerk is a complete suite of embeddable UIs, flexible APIs, and admin dashboards to authenticate and manage your users.
Alex Garcia @agarcia_me
2K Followers 1K Following software engineer who likes data a lot, open for freelancing! • he/him/his
jason liu @jxnlco
43K Followers 2K Following independent ai consultant, a16z scout, creator of instructor prev. @stitchfix @meta
Leonie @helloiamleonie
15K Followers 679 Following I do Machine Learning at @weaviate_io and write about it on the Internet | Google Developer Expert (Kaggle)
turbopuffer @turbopuffer
6K Followers 2 Following search every byte 🔍 {vector, full-text} search engine built from first principles on object storage. 10x cheaper, scales to 1T. powers Notion, Cursor, Linear
Simon Willison @simonw
117K Followers 6K Following Creator @datasetteproj, co-creator Django. PSF board. Hangs out with @natbat. He/Him. Mastodon: https://t.co/t0MrmnJW0K Bsky: https://t.co/OnWIyhX4CH
ethan steininger 🔎 @ethansteininger
640 Followers 1K Following indexing the world @mixpeek • prev search @mongodb • likely outside • tikkun olam
typesense | @typesense
15K Followers 71 Following • Open Source alternative to Algolia + Pinecone • Easier-to-use alternative to Elasticsearch • Blazing Fast, In-Memory Search Engine ⚡🔍 No PhD required
Leaflet @LeafletJS
29K Followers 1K Following Leaflet, an open-source JavaScript library for mobile-friendly interactive maps 🍃🇺🇦
Jon Yablonski @JonYablonski
6K Followers 351 Following Senior Product Designer. Author of Laws of UX. Creator of Humane by Design.
Andreas Eriksen @andreer
229 Followers 189 Following He/him. Dad and husband. I work at https://t.co/aVBqOzwwD1. My main hobbies are sailing, mountain/road biking, and creating an ultra low power personal computer.
Halvar Flake @halvarflake
44K Followers 3K Following Choose disfavour where obedience does not bring honour. I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected]
John Berryman @JnBrymn
3K Followers 453 Following AI/LLM consulting @ https://t.co/eHP9wX6uvy Author x2: https://t.co/kLQmgXYBrU, https://t.co/51YodoVZ0F Formerly Eventbrite, GitHub (code search and Copilot)
vespa.ai @vespaengine
3K Followers 6 Following https://t.co/abkb8IjPSH - the open source platform for combining data and AI, online. Vectors/tensors, full-text, structured data; ML model inference at scale.
The past time woman @Thepasttimew
32K Followers 12K Following "By viewing the old we learn the new." ~ Artist
Anthropic @AnthropicAI
645K Followers 35 Following We're an AI safety and research company that builds reliable, interpretable, and steerable AI systems. Talk to our AI assistant @claudeai on https://t.co/FhDI3KQh0n.
OpenRouter @OpenRouterAI
55K Followers 308 Following Discover and use the latest LLMs. 500+ models (incl. 50+ free), explorable data, private chat, & a unified API. https://t.co/qJG5mKrigL
Nicolay Gerold @nicolaygerold
1K Followers 616 Following senior engineer @AmpCode @sourcegraph podcast @howaiisbuilt ventures @aisbach
Terrastruct @terrastruct
456 Followers 0 Following Terrastruct is a diagramming tool specialized for software architecture. We're changing the way software is documented. https://t.co/41fG6K7273
David Hope @hopedj
310 Followers 343 Following Stock analytics, Dad to two severely autistic girls and Englishman in New York 🎶 views are my own.
udio @udiomusic
37K Followers 0 Following Generative music maker. Make your music. Discord https://t.co/4deihzV5gN Reddit r/udiomusic
Dan Courcy @DSCourcy
148 Followers 638 Following
Grayson Perry @Alan_Measles
192K Followers 614 Following artist, broadcaster, transvestite, lecturer, worshipper of teddy bears, telly addict, likes being on two wheels
The Sopranos Club @TheSopranosClub
136K Followers 66 Following We are the leading account on ‘X’ for The Sopranos talking points, polls, fresh info etc… If you have any content ideas for my posts, please DM me 👍
Theo - t3.gg @theo
246K Followers 4K Following Full time CEO @t3dotchat. Part time YouTuber, investor, and developer
ESchwaa @ESchwaa
2K Followers 6K Following Chief AI Officer. Intelligent Adaptive Software (IAS) Ai will change everything 💙 Chelsea.
Spotify For Developer... @SpotifyPlatform
18K Followers 2K Following Official Twitter account for the Spotify Developer Platform. Helping developers build apps on top of Spotify. Learn more at https://t.co/RzSxzZlC8R
Orama @OramaSearch
1K Followers 11 Following The open-source product answer engine. Full-text, vector, and hybrid search on any JavaScript runtime! 🔎 +9.5k ⭐ For support: https://t.co/i4br8Hn3Y7
@[email protected]... @jorgelbg
642 Followers 755 Following Odd mix between SRE and DevOps @Trivago_Tech, Observability & search. Apache #Nutch PMC, @TheASF member, #PerfMatters! #Solr/#Elasticsearch fan. #DevOps. 🇨🇺🇩🇪 📊
Dr Julia Ebner @julie_renbe
19K Followers 4K Following Leader of the Violent Extremism Lab @CSSC_Oxford, University of Oxford. Co-ED @isdglobal. Bestselling Author and Speaker. Views my own.
Vernon Reid @vurnt22
70K Followers 11K Following Guitar can take you far; from Brooklyn To The Sky...!
Joseph Moon @iamjosephmoon
1K Followers 4K Following ceo @oxy_int. entrepreneur, investor, scientist, writer, and musician in pursuit of meaning | prev: harvard, mit, & various startups
The Lens @TheLensOrg
1K Followers 158 Following A public benefit project of the npo Cambia, serving global patent and scholarly knowledge as a public good to inform science- and tech-enabled problem solving
The Exploding Heads @Exploding_Heads
95K Followers 320 Following Anthony Richardson & Mark Davison Sports Horn https://t.co/wLmiFAg7qg Buy us a coffee! https://t.co/ffdfGwUGHa explodingheadsproductions@gmail
UNKLE @unkleofficial
42K Followers 703 Following Original Headz - Since 1992 Brand new mixtape 'Rōnin II' - PRE-ORDER NOW
Jon Marshall @jon_marshall_
147 Followers 819 Following Advertising, photography, playing bass, surfing and plaid shirts. https://t.co/8va2LpnJnr
The Hives @TheHives
50K Followers 3K Following Listen to the new album, “The Hives Forever Forever The Hives” 👇