Martin Kleppmann @martin.kleppmann.com Associate Professor at @cst.cam.ac.uk, researching decentralised systems and security protocols. Advisor to the Bluesky team. Wrote “Designing Data-Intensive Applications” (O’Reilly). he/him
Neo Kim @systemdesign.one I Teach You System Design • 400K+ Audience
Join 170K+ Subscribers → https://newsletter.systemdesign.one/welcome
Fight for the Future @fightforthefuture.org 👊 Battling techno-fascism with our Internet-savvy blend of attention-grabbing activism and mass mobilization.
https://www.fightforthefuture.org/2026
LimaCharlie @limacharlie.io Security tools and infrastructure on-demand. Use LimaCharlie to automate and manage security operations at scale.
Center for Cybersecurity Policy and Law @cyberseccenter.bsky.social Since 2017, CCPL has combined policy expertise with convening power to bring industry leaders & policymakers together to better manage security threats.
https://www.centerforcybersecuritypolicy.org/
Black Hat @blackhatevents.bsky.social The world's premier Technical Cybersecurity Conference Series
Darin Pope @darinpope.bsky.social 
Viktor Farcic @vfarcic.bsky.social 
zeu @zeu.dev software engineer, developer educator @ twilio.com 🇵🇭🇺🇸🏳️🌈
http://zeu.dev - tangled.org/zeu.dev - http://github.com/zeucapua
stream: https://twitch.tv/zeu_dev - https://stream.place/zeu.dev
Randall Munroe @xkcd.com 
Sam Stepanyan @securestep9.bsky.social OWASP London Chapter Leader. #OWASP Global Board Member. OWASP #Nettacker Project Leader. #AppSec Consultant, #CISSP. Follow me on Twitter/X and Mastodon https://twitter.com/securestep9 https://infosec.exchange/@securestep9
MikeTalonNYC @miketalonnyc.bsky.social Professional Nerd - have been known to do security things. Partly Cloudy. Work from home astronaut. Posts are my own and don't represent anyone but me (and that's probably a good thing).
OpenUK @openuk.bsky.social The UK organisation for the business of open tech - engaging community to create a cohesive voice, impacting law and policy, whilst building open tech skills.
Kur3us @kur3us.bsky.social hacker | infosec | red team | appsec | pentest | cloud | CTF | husband | father | usafveteran | oscp | layerone ctf | toorcon ctf | #badgelife
Go @golang.org Go will make you love programming again. We promise.
https://go.dev/
Stephen Augustus (he/him) @auggie.dev Black.
#opensource governance: @kubernetes.io, @openssf.org, TODO Group
Office of the CTO, Bloomberg — Opinions are my own
Bio and links: https://whois.auggie.dev/
Formerly @stephenaugustus (Twitter), @justaugustus@hachyderm.io (Mastodon)
@madhavjivrajani.bsky.social @madhavjivrajani.bsky.social Systems @ UIUC | Helping Maintain The Kubernetes Project | GopherCon Co-Chair | ♥️ Theory + Systems | Views are my own.
Hannes Mühleisen @hannes.muehleisen.org I like databases and boats. Co-creator of @duckdb.org, Co-Founder and CEO DuckDB Labs.
Fernando Meyer @fernandomeyer.com LabHacker platform engineer and musician;
I'm drawn to hard problems, abstractions, and music;
I build code, hardware, and systems meanwhile overthinking with pen and paper until they’re simple. ps: I have more notebooks than is socially defensible.
Alex Xu @bytebytego.bsky.social Follow me for system design & book-writing tips. | Author of the bestselling book series: ‘System Design Interview’ | Join 350,000+ Readers: blog.bytebytego.com
Reuben Bond @rbn.bsky.social Distributed Systems & databases person. Works at Microsoft on Orleans & Aspire
Timo Reimann @timoreimann.bsky.social Systems Engineer working @ Cloudflare
Twitter: @timoreimann
James Munnelly @munnerz.bsky.social Kubernetes @ Apple | cert-manager maintainer | previously @ Jetstack
David Crawshaw @crawshaw.io ceo exe.dev, tailscale co-founder, programmer
tiffany jernigan 🐦🔥 @tiffanyfay.dev 👩💻🥑 @grafana.bsky.social
☸️ #cncf ambassador
💻 ex- vmware, amazon, intel, docker
🎓 electrical engineering georgia tech
💭 opinions:mine
📸 instagram.com/tiffanyfayj
🇺🇸 seattle, wa
🔗 linktr.ee/tiffanyfay | tiffanyfay.dev
Mark Russinovich @markrussinovich.bsky.social CTO of Microsoft Azure, author of novels Rogue Code, Zero Day and Trojan Horse, Windows Internals, Sysinternals tools. Opinions are my own.
Murat (Distributolog) @muratdemirbas.bsky.social Distributed systems,Database systems, Lightweight formal methods, TLA+
https://muratbuffalo.blogspot.com/
Jepsen @jepsen.mastodon.jepsen.io.ap.brid.gy Breaking distributed systems, one fault at a time.
[bridged from https://mastodon.jepsen.io/@jepsen on the fediverse by https://fed.brid.gy/ ]
Phil Eaton @eatonphil.bsky.social on software infrastructure @theconsensus.dev.
theconsensus.dev
Sergiu Gatlan @serghei.bsky.social Cybersecurity/tech reporter @BleepingComputer / serghei.ro
J. A. Guerrero-Saade (JAGS) @jags.bsky.social VP of Intelligence and Security Research, Senior Technical Fellow (AI) @ SentinelOne.
Distinguished Fellow and Adj Professor @ Hopkins SAIS Alperovitch Institute. Three Buddy Problem Co-Host. LABScon Founder, Cyber Paleontologist, Fourth-Party Collector.
Chris Wysopal @weld.bsky.social Gray haired gray hat. Co-founder Veracode. Former L0pht security researcher. Builds tools to find and fix vulnerabilities in code at scale.
GrapheneOS @grapheneos.org Open source privacy and security focused mobile OS with Android app compatibility.
https://grapheneos.org/
Electronic Frontier Foundation @eff.org We're the Electronic Frontier Foundation. We're a nonprofit that fights for your privacy and free speech online. Find all of EFF's social media accounts at eff.org/social.
Taz Wake @tazwake.bsky.social DFIR & Threat Hunting Professional | SANS Course Author - FOR577 Linux IR Class | Certified SANS instructor | Incident Responder | I have no access to DMs.
Andrew Case @attrc.bsky.social Volatility Core developer, Dir. of Research Volexity, LSU Cyber
jamesejr @jamesejr.com Security Engineer @ Discord. Detection & Response Engineering. Previously @ Cloudflare.
Technology, food, travel, and photography. https://jamesejr.com
Matthew Green @matthewdgreen.bsky.social I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
Heather Adkins @argv.bsky.social VP Security at Google. Co-Chair Cybersafety Review Board, Co-Author Building Secure and Reliable Systems. r00t. Medieval historian.
Dan Conn @danconn.dev Staff Platform Security Engineer by day, bad musician by night. Also Hacker, Coder, Runner, Feminist.
5x Marathon Runner, 2x HM, 2x 10k🏃
Personal Acc.
https://danconn.dev
David Buchanan @retr0.id reverse engineering, cryptography, exploits, hardware, file formats, and generally giving computers a hard time
Fedi: @retr0id@retr0.id
Macroblog: https://www.da.vidbuchanan.co.uk/blog/
Lisa Forte @lisaforte.bsky.social Cyber security, climbing, caving and diving! 💜
p(👻) @0x0.boo Security. People matter most.
Black Hills Information Security @bhinfosecurity.bsky.social Specializing in pen testing, red teaming, and Active SOC. We share our knowledge through blogs, webcasts, open-source tools, and Backdoors & Breaches game.
blackhillsinfosec.com & poweredbybhis.com
Ciaran Martin @ciaranm.bsky.social Calm the FUD down
DEF CON @defcon.bsky.social The world’s premier hacker conference. Serving the global hacker community since 1993.
Defcon.org
Forum.defcon.org
Defcon.social
OWASP® Foundation @owasp.org We improve the security of apps with community-led open source projects, 260 local chapters, and tens of thousands of members worldwide. Famous for OWASP Top 10
DC151 @dc151.org Regular Leeds gathering for hackers, makers & people interested in security & tech | Meets every 2nd Wednesday | Disorganised by @glenn.pegden.com, @laurawhit.bsky.social and @roachy.net
* No longer affiliated with DEFCon Groups *
BSides London @bsideslondon.bsky.social 📅 13 Dec 2025 | 📍 Novotel London West
Grassroots-driven security conference.
Built by the local InfoSec community, for the community.
Web: https://BSides.London
X/Twitter: https://x.com/BSidesLondon
#BSidesLDN2025
WIRED @wired.com For Future Reference.
Sign up for our newsletters: https://wrd.cm/newsletters
Find our WIRED journalists here: https://go.bsky.app/Boj9b5E
sysengineer @sysengineer.dev I do not give Facebook permission to print anything off my computer
Graham Cluley @grahamcluley.com Award-winning #cybersecurity keynote speaker, writer, podcaster | Host of multi-award-winning @smashingsecurity.com podcast.
❤️ #DoctorWho, #Beatles, #Chess
He/him
🌐 https://grahamcluley.com
🎙️ https://www.smashingsecurity.com
Kenn White @kennwhite.bsky.social cryptography • neuro • cloud • biscuits
ORD-DCA-NYC-BCN ✈️
kennwhite@mastodon.social
dell cameron @dell.bsky.social Sr. writer @wired.com:
Surveillance & coptech
Signal: dell.3030
InfoSteph (92%) @stephandsec.com She/Her. Cybersecurity Educator & Engineer. Writer. Keynote Speaker. LinkedIn Learning Author (150K+ learners). Neurospicy (ADHD). Sharing insights to inspire growth and connection. Black and proud.
Stephandsec.com
Phillip Wylie @phillipwylie.bsky.social Offensive Security Professional | Phillip Wylie Show Podcast Host | The Pentester Blueprint coauthor | TribeOfHackers Red Team | https://linktr.ee/phillipwylie
Alyssa Miller 🦄👩✈️ @alyssam-infosec.com Hacker, CISO, and commercial pilot. Certified Bluesky Elder. Author and International Speaker, Chief advocate of #DoBetterBeBetter
Compassion and empathy are traits in short supply but necessary to make this world a better place.
alyssasec.com
UK_Daniel_Card @mrr3b00t.bsky.social 
Lady Cyber Rosie 🧚♀️ @ladycyberrosie.bsky.social th4ts3cur1ty.company Magical Genie Person 🧚♀️
Former/Recovering Cyber Security Recruiter
BSides Lancashire Founder
Responsible adult for BSides Leeds
Supporter of the Infosec community
Working Parent
Lock Down Your Life @lockdownyourlife.com Privacy Architect/Online Safety Strategist/#OSINT Investigator • 🔞 21+NSFW 🌶 She/Her
All My Links: https://beacons.ai/lockdownyourlife
Paylinks, wishlist, Spicy 👇🏻
https://linktr.ee/lockdownyourlife
Bitquark @bitquark.io 🥷 British hacker and coder
✨ Space and language nerd
🎩 Black Hat EU review board
🐈 Neurodivergent. Poly. He/him.
🛠️ https://github.com/bitquark
SeanWrightSec @seanwrightsec.com Principal Application Security Engineer focused on all things #AppSec. Occasionally dabble in my own research. Also keen gamer and aspiring photographer.
Alexander Martin @alexmartin.bsky.social Journalist covering cybersecurity and intelligence. UK Editor at The Record from Recorded Future News. Dad of two.
🏠 Sheffield
📧 alexander.martin@therecord.media
📱 Signal: AlexanderMartin.79
Marcus Hutchins @malwaretech.com threads.com/@malwaretech
https://linkedin.com/in/malwaretech
https://marcushutchins.com
Glenn Pegden @glenn.pegden.com Good Guy Hacker, Dad, App Sec / Vuln Man / Pentest specialist and leader, conference organiser, volunteer, speaker and attendee, retro gamer, Blackburn Rovers and Leeds Knight fan ….. hacker
http://Glenn.pegden.com/findmeon
Tib3rius @tib3rius.bsky.social Web App (mostly) Hacker | Cybersecurity Educator | Content Creator | Ex-Brit | Links: http://linktr.ee/tib3rius (he/him) 🇺🇸 A mostly unserious person. @therealc3rul34n.bsky.social is bae 🥰
Łukasz @maldr0id.bsky.social Military-grade reverse engineer @ Google, working on Android malware
Got mistaken for a member of Project Zero once.
Everything here is my own opinion
he/him ✨🌈🦄
Jack Rhysider @jackrhysider.bsky.social Creator of Darknet Diaries.
Verification: https://twitter.com/JackRhysider/status/1675298532406984707
shenetworks @shenet.works Networking • Hacking • Hacking Networks (she/her)
shenet.works
Pwnallthethings @pwnallthethings.bsky.social Just thinking out loud.
Jane Manchun Wong @wongmjane.com 
LiveOverflow 🔴 @liveoverflow.bsky.social wannabe hacker... he/him
🌱 grow your hacking skills https://hextree.io
Daniel Cuthbert @dcuthbert.bsky.social Ageing hacker, long time documentary photographer. Black Hat Review board. Now sitting on numerous government cyber security boards so I guess that means I’ve grown up right?
d0nut @d0nut.dev 🦀 Rust + Security 🔑
garethr @garethr.bsky.social VP Product @snyksec. @openpolicyagent Conftest maintainer. Developer, designer, product. Open source geek. Devops Weekly. @gdsteam alum. he/him.
TomNomNom @tomnomnom.com Computer booper and food enthusiast. He/him.
Sarah Cecchetti @sarah-cecc.bsky.social Head of standards and innovation at Beyond Identity (Series C). Founder, IDPro. Identity and access management nerd.
Tim Cappalli @timcappalli.me 🔐 #passkeys 🪪 verifiable digital credentials
🏒 bruins ⚾️ sox 🚆 urban mobility 🍉
cars ruin cities
Passkeys Developer 🔑🧑💻 @passkeys.dev The official home for passkeys.dev on Bluesky/ATP!
We'll be posting a whole lot about #passkeys and #webauthn!
Brian Pontarelli @voidmain.bsky.social Founder of FusionAuth. Founder of CleanSpeak. Coding for 35 years. Bootstrapped entrepreneur for 16 years. Critical thinker.
Dan Moore @mooreds.com Sr. Director, CIAM Strategy & Identity Standards at @fusionauth.io . Hangs out on HN too much. Author of "Letters to a New Developer", contributor to "97 Things Every Cloud Engineer Should Know". Writes at http://ciamweekly.com
Matt Burgess (WIRED) @mattburgess1.bsky.social Security writer @wired.com
Cybercrime, privacy, surveillance, and more.
Signal: mattburgess.20 | Email: matt_burgess@wired.com
Tim McNamara @timclicks.dev Trainer and consultant on the Rust programming language. Author of Rust in Action. Team climate. Walkable neighbourhoods are nice, actually.
Signal: @timclicks.01
Sebastián Ramírez @tiangolo.com Creator of @fastapi.tiangolo.com, Typer, SQLModel, Asyncer, etc 🚀
From 🇨🇴 in 🇩🇪
Open Source, APIs, and tools for data/ML 🤖
Building @fastapicloud.com ⚡️
Mr. Fresh™️ 📡 @mrfresh.bsky.social satcom systems engineer | guitarist | film & media composer @ sftfmusic.com | coding in #Python James 1:12 | modern electronic music fan vibesnscribes.com
Jacob Coffee @scriptr.dev Director, Engineering @ The PSF (thoughts my own)
@pypi.org, @pycon.us, @python.org, all the fun Python things
- Helping maintain @Litestar.dev, r/Python, and other fun things
- Serial starter of unfinished projects
- Foodie
Armin Ronacher @mitsuhiko.at Creator of Flask • earendil.com ♥︎ writing and giving talks • Excited about AI • Husband and father of three • Inhabits Vienna; Liberal Spirit • “more nuanced in person” • More AI content on https://x.com/mitsuhiko
More stuff: https://ronacher.eu/
Mahdi Yusuf @mahdiyusuf.com Sr. Engineering Manager @ Apple. Distributed Systems and Data. Previously @ 1Password.
Homelabs, databases, and basketball.
✍🏾 @architecturenotes.co
Architecture Notes @architecturenotes.co engineering notes about software architecture from your favourite corps by engineers for engineers.
Charles @charles.dardaman.com AI | Hacking | Security | Malware | Founder/CTO (acq.) | CS PhD @UT_Dallas
Seth Larson @sethmlarson.dev Python core developer, Security & Fellow of Python Software Foundation (@python.org) 🐍 Minnesoootan, he/him, #Python, #opensource, #security #retrogaming
🌐 https://sethmlarson.dev
Marlene @marlene.bsky.social Pythonista, explorer living in London atm, AI & Python at Microsoft🐍✝️✨
Real Python @realpython.com Online #Python Training & Expert Community: Tutorials, Video Courses, Books, Quizzes...and More! Join 1M+ Pythonistas at http://realpython.com
Stephen Gruppetta @stephengruppetta.com Constantly looking for simple ways to explain complex things…
Here you'll find:
• Python
• Narrative Technical Writing
• Track & Field Athletics
Links in the pinned post below
stephengruppetta.com
Amanda Brock @amandabrock.bsky.social CEO @OpenUK, open source stuff - Advisory, Policy, Keynote, Writer, Exec Producer State of Open Con. Slave to #kittendundee AuDHD
LOPUG (London Platforms User Group) @lopug.bsky.social Our user group brings together people who are developing and using internal platforms to share their experiences.
Follow us at https://www.linkedin.com/company/london-platform-user-group-lopug
DevOpsDays London @devopsdays.london DevOpsDays London 2025 coming soon...
https://devopdays.london
Paula Kennedy @paulalkennedy.bsky.social Founder & COO @ syntasso.io building kratix.io | Ex-VMware, Pivotal, CloudCredo | Co-organiser: @kcduk.bsky.social, @devopsdays.london, @lopug.bsky.social | Pronouns: She / her
Sonya Moisset @sonyamoisset.bsky.social Staff Security 🥑 || 5x GitHub 🌟 || ☁️ OpenUK Security Advisory Board Member || ✍️ 5x Top contributor for freeCodeCamp || 🪲 TryHackMe room creator || 🏆 #TechWomen100 || 🛡️ Top 30 Women of Influence in Cyber