Test Double @testdouble
Great software is made by great teams. We build both. 💚 @[email protected] testdouble.com Columbus, OH Joined October 2011-
Tweets1K
-
Followers2K
-
Following225
-
Likes656
Itching to problem solve after all of those #RailsWorld talks, but trying to figure out where to start? Request a no-strings-attached, virtual pairing session with our experienced software devs or product managers for after you get back from travels.
When a wide range of things aren't working or didn't scale effectively, you hit trade off decisions. To make an effective business case for budgeting you need to ensure you're advocating for the right things. Our pragmatic and actionable assessments help you do just that.
Double agents representing at Rails World: @leequarella, Pier-Luc Faucher, and Mike Bowman. Come say hello, and find out how nice our double agents are. (And unlike agentic agents, conversations on challenging code won’t go off the rails.) #RailsWorld
Python type safety lightbulb moment: mypy = compile-time safety Pydantic = runtime safety Helped a client shift domain knowledge from heads → codebase with this combo. link.testdouble.com/5075d7 No more "wait, what does this field contain?" moments 🎯 #python #pydantic
Your velocity problem isn't a headcount problem. It's an unclear requirements problem. A technical debt problem. A tooling problem. Hiring more developers to work around broken processes just amplifies the chaos. link.testdouble.com/b38160
Imagine Lord Business stops obsessing over story points. They talk about impact and ask better questions. Data informs decisions—instead of controlling people. It's time we stop measuring what's easy—and start measuring what matters. link.testdouble.com/3ff648
When you work with constraints instead of fighting them, you discover some pretty cool ways to solve problems.
Taking a prescriptive AI agentic prompt approach pigeonholes the model into a path. Don't miss out on AI agents' greatest strength—explorability! @_joedupuis shares a double loop model for iteration. link.testdouble.com/c668f9
To think differently about your problems, you not only need to look at things from a different angle—you need to look at different *things*
Let's update your software systems bit by bit—no need to throw everything out and start from scratch. Give us a holler if you want to talk more about what that means for you, your team, and your codebase.
TFW nothing works, everyone is frustrated with everything, and you don't know what to fix or where to start. Our technical and product assessments uncover root causes and prioritize real fixes we can help you with, not slide deck solutions. Give us a holler to find out more.
From "don't make mistakes" to "let's manage them better" is a journey. One mindset leads to burnout and blame. The other leads to automation, better processes, and actually sustainable software delivery. Guess which one works? link.testdouble.com/d41e49
C# myths that need to end: ❌ Windows-only ❌ Enterprise-only ❌ Slow startup ❌ Vendor lock-in Modern .NET runs everywhere, compiles to native binaries, and has an open-source ecosystem. Patrick Coakley discusses how it has evolved. link.testdouble.com/5f1e10
🔍 Observability doesn't need a big overhaul Gabriel turned months-long debugging sessions into quick wins with: → Structured logging → Simplified queries → Stakeholder dashboards In the end, the biggest challenge was knowledge transfer. Full story: link.testdouble.com/1bcb38
CEO & Co-founder Todd Kaufman talked with E.N.G. Media about: 🤔 Legacy systems are misunderstood 🧨 Avoid a complete rewrite 🤩 Great software consultants 🤖 Unique approach to AI tooling 🏗️ 100% employee-owned company youtube.com/watch?v=HPXzNW…
Scaling engineering without scaling problems. It's common to equate scaling with churning out features. Instead understand the human element behind blockers. Iterative improvements compound instead of problems for better technical and business outcomes. link.testdouble.com/1751ee
Running into problems with your legacy system? We'll help fix it up, not just slap on another bandaid. Iterative improvements can help your team create value for the wider business. And automated test suites can make it easier to maintain the codebase long into the future.

Drew Bragg @DRBragg
1K Followers 774 Following Senior Engineer @ Podia Not from Oklahoma Podcast: https://t.co/KFZq7sIzce DRBragg on most things
Collin @collin_jilbert
3K Followers 1K Following Does Ruby things @gorails, @hatchboxio, and @jumpstartrails | Skateboarder | Drummer | Co-editor @therubyradar
Andrew Mason @andrewmcodes
5K Followers 2K Following 👨🚀 Senior Ruby on Rails 🏗️ Product Developer ➡️ @podia 🎙 co-hosting @remote_ruby & @rubyforall 📥 @therubyradar for the latest in the Ruby community 💎🌵⌨️
Jeremy Smith @jeremysmithco
2K Followers 3K Following Product-focused Rails dev • Building: https://t.co/VB5nnSmEz2 • Studio: https://t.co/ZrmGeEnhcI • Co-host: @indierails • Run: https://t.co/X0kD85uiQf • Prev. organizer: @blueridgeruby
glennjamin @GlennHarmonJr
597 Followers 1K Following Father | Husband | Cyclist | Jack of all trades
Jason Karns @jasonkarns
859 Followers 328 Following PGP: https://t.co/NAp876Hc3G @[email protected] #ragesad
schwad @schwad_rb
3K Followers 1K Following rubyist | job: @shopify | former: @chef | opinions: mine | https://t.co/CFg1l78KLe
Lucian Ghinda @lucianghinda
5K Followers 3K Following Product Engineer, Ruby on Rails Developer Curator of @shortrubynews Trainer at https://t.co/XFRrJeCJ6K
Adekola Oluseye @AdekolaOlu94705
40 Followers 838 Following
PamelaCronin @0L7Pp3sn9W987C4
35 Followers 2K Following
Ben Roesch @bcroesch
266 Followers 162 Following Co-Founder/CTO @CultivateLabs. Builder of @arcanalysis, the Analyst Research Companion and @raif_ai, a Ruby/Rails engine for LLM apps
MerrySam @0DK9Kfut3f61ojL
324 Followers 4K Following
Bing Dai @bing_dai
320 Followers 1K Following
Corrina Savage @corrina94165
1K Followers 7K Following What's past is Prologue-WS Commercial Helicopter Pilot, IFR, CFI Retired Navy, Workout Enthusiast
Matt Tarantino 👨�... @MattTarantino
479 Followers 872 Following 👨🏻💻 Staff Ruby on Rails SWE turned DevOps Tech Lead ⚙️ AWS Certified 💻 Tech Enthusiast
Rhiannon Payne | Acti... @rhiannon_io
3K Followers 2K Following Founder @SeaFoamMedia 🌊 | Marketing for https://t.co/aTNVNCEhq4 💎 | Author of @RemoteWorkEra 📖 | Prev: @RubyCentralOrg @Remote | 麗奈
Mr Sergei Sergeev @sserzant
139 Followers 449 Following Infra Engineer | ex Head of QA | ex Test Automation Lead | Python Azure K8s Grafana | ex-Skype Agile Transformation Team | rt ≠ agreement |
maax @MaxTech993
5 Followers 286 Following
Jane @Jane62046277272
2 Followers 133 Following
Marz Drel @marzdrel
144 Followers 702 Following
German Velasco @germsvel
3K Followers 340 Following 💧Elixir and 🔥 Phoenix consultant (see https://t.co/kTbNt4SJc5) 🎥 Short tips https://t.co/CqhBJEf2SE 🎙 @elixir_friends
Alex Ringberg @Ringbergdev
0 Followers 27 Following
Melody Cox @MelodyC558982
687 Followers 8K Following
Shoteat @ShoteatVvAk
28 Followers 993 Following
mathyas @m4thyasp
7 Followers 178 Following Software Engineer @ Shopify New Yorker in Toronto Mostly talking to myself
David @pd96dev
306 Followers 5K Following
Dak @dakdevs
2K Followers 6K Following swe @mercury • director of tech @itstechnight • partner @thewebteamco • pickleball noob • posts are my own personal views and opinions
Clyde Frog @ClydeFrog532206
0 Followers 32 Following
JOSEPH BUDDE @mooncatVO
48 Followers 409 Following
Michael Foltz @mfoltz
116 Followers 433 Following Information Technology Professional, Father, Husband, Geek and love golf.
Shawn Bales @BalesShawn
42 Followers 222 Following Glory to Jesus Christ who is able to do immeasurably more than all we can ask or imagine!
Kotlin Dave (Lucas) @KotlinDave
16 Followers 168 Following Senior Software Engineer focused on Server Side Solutions + #Kotlin Enthusiast + Mentor + Trainer
Fernando Barroso @FerBarroso95
308 Followers 1K Following AMDG | husband + dad | nibbio - founder + CEO
Daniel Bergholz @danielbergholz
2K Followers 1K Following The JS to Elixir guy. Making tech education free and accessible on https://t.co/PNA06mKdZ2
Christoph Hanazeder @CHanazeder
145 Followers 2K Following #CTO #pneumatictubesystems currently Learning @elixirlang and Erlang
ahmed rouizi @AhmedRouizi
416 Followers 6K Following
Simon Drey @szydre
356 Followers 2K Following Manager, Author, AI, Ecology, Economy, Design, Architecture
Will @wrwillrosa
0 Followers 210 Following
Emily @emilyevelyn1995
13 Followers 621 Following
lopezcodes @lopezcodes
17 Followers 369 Following Developing in Ruby on Rails for 2 years. Proud member of the community, excited about the latest updates and innovations. #RubyOnRails
Code Nautics @codenautics
22 Followers 300 Following We build custom mobile apps and websites. Visit our website for live projects!
deadmansec (ran by ne... @deadmansec
2 Followers 69 Following We're the digital shadows, the silent guardians, the watchful protectors. Need to hide your secrets in plain sight? We're your guys. Just don't ask how we do it
rogafeSquare @rogafe_sec
150 Followers 3K Following backend dev. Be smart about your OPSEC, think things through They found DPR, they'll come find you - Dual Core
Douglas S. Andrade @douglasandrade
991 Followers 4K Following Brazilian in Canada, Mineiro, father of three amazing kids, warrior of the good fight. 🦋: @dsandrade.bsky.social 🐘: https://t.co/u5BbF5nYVB
Gregory @gregoryfm
351 Followers 2K Following
Dementor H @dementor_h
182 Followers 1K Following
WHL @wanghailei
186 Followers 1K Following a designer / programmer / artist / entrepreneur, who has 40+ Savile Row bespoke suits and 500+ boxes of cigars // ex design director of IDEO
Mike Bowman @mbowman2
96 Followers 445 Following
Tim Ottinger @tottinge
32K Followers 727 Following Technically adept, practical, a good communicator, ethical, and committed to team development and personal growth. @IndustrialLogic & @ModernAgile.
Kent Beck 🌻 @KentBeck
183K Followers 829 Following Programmer, coach coach, artist, pokerist, singer/guitarist. Learning to be me. Chief Scientist at Mechanical Orchard. Mastodon: @[email protected]
Jason Karns @jasonkarns
859 Followers 328 Following PGP: https://t.co/NAp876Hc3G @[email protected] #ragesad
Noel Rappin @noelrap
4K Followers 876 Following Staff Engineer at Chime. Co-author of Programming Ruby. Author of Modern Front End Development for Rails. Also, https://t.co/Zt5cNRNXIt to find me. (He/Him)
Doc Norton @DocOnDev
9K Followers 720 Following #Agile and #Leadership #Coach Blogger: https://t.co/V65DVbpGov Author: https://t.co/KT8G7KZTCN Also: @[email protected]
RubyConf @rubyconf
17K Followers 148 Following Since 2001, RubyConf has been the annual gathering of Ruby enthusiasts from around the world to network, enjoy talks, and gain insights from industry leaders.
We Do TDD @WeDoTDD
1K Followers 4K Following https://t.co/2DzYmJmMOF: Tracking companies, teams, coaches & crafters who practice Test Driven Development.💬 Join our Slack:https://t.co/0vAWtd3dWn; 🤑Support: https://t.co/HFcaktd2gf
Dave Schinkel @DaveSchinkel
826 Followers 3K Following https://t.co/L8jZfabdxY LC Hockey Media: https://t.co/GYKiSstKQk TDD TV: https://t.co/0NKlb8LAKx Dimecasts: https://t.co/YMIrO4HAzb
Evergreen Journal by ... @EvergreenJourn
736 Followers 308 Following Chronicling the people, companies, and innovations of the Evergreen movement.
Alyssa @alycit
1K Followers 1K Following Creative girl & Lover of people. Engineer @stitchfix, @codemash board & speaker co-chair, Former @Devbootcamp Chicago instructor (RIP)
WNB.rb @wnb_rb
990 Followers 156 Following A Ruby community for women and non-binary people! We host meetups, interview prep groups, bookclubs, CFP working groups and so much more! https://t.co/1kD7vynEmF
josephmarty @josephmarty
25 Followers 36 Following
Daniel Huss @Daniel_N_Huss
13 Followers 62 Following https://t.co/hNUldFrNXj Aspiring technomancer. Experienced communicator.
Colleen Leonard @ccle... @_colleenleonard
133 Followers 173 Following adhd-fueled dabbler | people + code | skates a lot technical recruitment @testdouble
Women Techmakers @WomenTechmakers
131K Followers 675 Following @Google's global program dedicated to helping women thrive in tech through visibility, community, & resources.
AnitaB.org @AnitaB_org
50K Followers 6K Following We are no longer active on this platform. You can learn more about joining us at GHC here: https://t.co/pqQLOYbStv. Stay connected with us on LinkedIn and Instagram!
PowerToFly @powertofly
12K Followers 984 Following Helping highly skilled professionals advance their careers & helping companies become places where they can thrive. Email us at hi@powertofly.
Shireen Hafeez @deafkidscode
2K Followers 2K Following Founder of DEAF KIDS CODE, Believer, #a11y, The Digital Age is the Great Equalizer, Cultivating human potential.
Black Girls Code @BlackGirlsCode
115K Followers 3K Following Inspire, educate, and launch one million Black girls in tech by 2040.
Women in Technology @WITWomen
162K Followers 460 Following Not-for-profit organization aimed at providing #WomenInTech with #networking and professional development opportunities
BlackCodeCollective @blkCodeCollctve
9K Followers 245 Following We're a community of black devs supporting our skills, careers, & curiousity. Join us! Donate: https://t.co/SHwFEj9psJ
Out in Tech @OutInTech
7K Followers 780 Following 🏳️🌈Uniting LGBTQ+ tech. Become a member today and join 40k+ members worldwide. It's 100% FREE.
Latinas in Tech @latinas_tech
7K Followers 547 Following LiT is a global community where Latina tech professionals and allies build the capabilities, connections, and confidence to thrive. https://t.co/HPvWtH130K
Women Who Code @WomenWhoCode
316K Followers 3K Following WWCode Summit at TechFutures Oct. 7-9 Get 🎟️ at https://t.co/ToXlNzohMe ⚡️WWCode is BACK! ⚡️500K+ technologists, 147+ Countries, leveling up our skills #wwcode
/dev/color @devcolororg
12K Followers 592 Following The most powerful network of Black software engineers around. https://t.co/nSbvfK2uFr
Reliable Web Summit @ReliableSummit
199 Followers 192 Following Reliable Web Summit - Quality, Scalability, Testing | August 2021 | Online
ben @bnchdrff
622 Followers 1K Following
kt @a_sleepy_sheepy
233 Followers 85 Following Software engineer. Women's hockey fanatic. Pronouns she/her. Avatar by @zombielesbean
Jesse O'Brien @jesseobrien_
2K Followers 606 Following Programmer, I love Rockets and Aerospace, Family, Music, Gaming, 3D Printing. Views are my own. Enamoured with @ladycarni 🥰 Double Agent @testdouble
Aaron Frerichs @aaron_frerichs
276 Followers 527 Following Senior Software Consultant at Test Double. I nerd out over Linux, Rails, and coding of almost any kind. Views expressed are my own. he/him
Nicholas Henry @nicholasjhenry
392 Followers 17 Following
Pete Heard @pteheard
4K Followers 62 Following Precious Metals Investor, Exited BTC in 2021 and bought GDXJ 🚀 been waiting patiently for pay day.
Meagan Waller 💎�... @meaganewaller
529 Followers 1K Following senior software consultant @testdouble 👩🏻💻 ruby & js✨ lifts up heavy things and puts them down 🏋🏻♀️ diet coke driven developer 🤙🏻 she/her ☀️ 🐕🐾
Jessie Puls @jessiepuls
155 Followers 277 Following
Jamie Phelps @jxpx777
997 Followers 207 Following He/him. “Smartsure and cocksure” —@hotdogsladies Consultant @TestDouble; formerly @1Password
Tom Nightingale @thetnightingale
190 Followers 1K Following Kiwi in Canada. Double Agent @testdouble
Daniel Flynn @dflynn15
269 Followers 556 Following @testdouble lets me dev things, pretend minimalist, ☕ addict, proud Hokie, and love my wife @kelceyflynn. I fork repos and then nuke their code.
Stephen Vance @StephenRVance
294 Followers 224 Following Husband, adventurer, Agile coach, technical author, presenter, cyclist, reader, part-time dog walker
Rob Vitaro @robvitaro
74 Followers 151 Following Rob Vitaro is a Christian, husband, father, writer, programmer, artist and generally all around nice guy.
Camilo (@cam@hachyder... @camdotbio
630 Followers 807 Following Software Developer | writing long-lived maintainable code i won't hate | 💻 🎻 🐶 | he/him/his | #MiamiTech since '88 for you SUCKAS https://t.co/sTeyvmd1jz
Cathy Colliver @CathyColliver
871 Followers 866 Following Marketing & MBA. Arts & news geek. Student of history. Raising little men to respect women. Former CJ Editorial Board. She/her. @[email protected]
Joé Dupuis @_joedupuis
47 Followers 121 Following Senior Software and DevOps consultant at Test Double
Van Anderson @van_anderson
15 Followers 35 Following
Josh Klina @jj_klina
101 Followers 370 Following [email protected] - I'm found and trying to get lost. Pixels, machines, craftsmanship, humanities, love.
Nathan Vanderlaan @N_Vanderlaan
78 Followers 174 Following VP of Engineering / Software Engineer / Former Architect