Coding isn't holding you back. Product work is.
Introducing Modem, your dev team's auto-triage PM.
It listens to user signals 24/7, finds problems before you do & does the work you're slow at – filing tickets, pinging teammates, closing the loop.
Sign up today at @modemdev
🧑💻 Engineering managers:
😬 If every deploy makes your team nervous, the problem isn’t confidence — it’s tooling.
🧗 Feature flags turn production into a controlled environment, not a cliff edge.
https://t.co/ZDq5EymzOO
#FeatureFlags#SoftwareEng#EngManager by @markcallen
⏱️ Every hour your engineers spend maintaining a homegrown feature flag system
🏗️ Is an hour they’re not building features users actually pay for.
DIY flags aren’t free.
🐢 They’re paid for in lost velocity, focus, and morale.
https://t.co/tRbOGmtvDy #FeatureFlags#SoftwareEng #EngManager by @markcallen
✅ The era of smashing the big green deploy button and praying is over.
When AI writes code, you don’t launch it wide.
You wrap it in a feature flag.
Ship to prod.
Turn it on for 3 people.
Watch it breathe.
Then roll it out.
This is how AI code survives production. 🏕️
https://t.co/f8Zyqs3DxC #FeatureFlags #SoftwareEng #EngManager by @markcallen
👾 Engineering teams don’t slow down because of code
🐌 They slow down because every deployment is treated like a launch
🏎️ Feature flags fix that
👯♂️ Decouple deploy from release → ship faster, fear less, validate sooner
🔥 If you’re still shipping big-bang style… you’re burning velocity
https://t.co/MAe9rpCUEa
#FeatureFlags #SoftwareEng #EngManager by @markcallen
The real data is brutal:
• 30% of engineering time lost to DIY flag maintenance 🚧
• 73% of flags never removed 🔒
• Thousands of hours per year navigating flag technical debt and bloat 🫃
Homegrown feature flags aren’t “lightweight.” They’re a slow bleed. 🩸 🩸 🩸
https://t.co/tRbOGmtvDy #FeatureFlags #SoftwareEng #EngManager by @markcallen
🔁 The modern dev loop (or cycle 😉) isn’t write → test → ship anymore.
It’s:
🤖 generate → 🏁wrap behind feature flag → 🚀 deploy → 🍰 test on a tiny slice → 🛼 roll out
🏃💨 That loop is why AI-driven teams ship faster without lighting prod on 🔥🚒.
https://t.co/f8Zyqs3DxC #FeatureFlags #SoftwareEng #EngManager by @markcallen
⚔️ Most teams think they have a product/engineering alignment problem.
🏁 Really, they just don’t have feature flags.
🎚️ Flags turn launches into decisions, not deployments—PMs own timing, engineers own flow, and everyone sleeps better. https://t.co/MAe9rpCUEa
#FeatureFlags #SoftwareEng #EngManager by @markcallen
🤖 Introducing AI-powered Feature Flagging! DevCycle now provides a hosted MCP server to allow you full control over your 🚩 across @cursor_ai@windsurf@claudeai and @code https://t.co/zCmN4w7UQS
Building @DevCycleHQ MCP server started off as one of my favourite hackathon projects we've ever done. But it took a lot of iteration to go from “it works” hackathon code to production-ready code. Here’s what we learned along the way (thread):