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Crackr

Get unstuck on LeetCode & AI problems — live 1:1 sessions with ex-FAANG engineers

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Crackr pairs junior devs and AI engineers with ex-FAANG experts for live 1:1 coaching sessions. Get unstuck on LeetCode, debug your RAG pipeline, or nail your system design interview. Sessions are led by engineers with experience at Google Brain, OpenAI, and Anthropic.

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Features

  • Live 1:1 sessions with ex-FAANG engineers
  • LeetCode rescue, system design coaching, and AI debugging help
  • Fast scheduling and focused one-problem sessions
  • General coding interview support plus RAG and LLM workflow troubleshooting

Use Cases

  • Interview prep for junior developers stuck on LeetCode-style problems
  • System design interview coaching for mid-level engineers
  • RAG pipeline debugging and LLM workflow troubleshooting for AI engineers
  • Live technical coaching when self-serve tools are not enough

Comments

We built Crackr for developers and AI engineers who are blocked on one problem and need a senior human right now, not another generic tutorial. Feedback on the positioning and best use cases is welcome.

nice. it would be good to have mentorship program too

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Tech, AI, Bitcoin, RSI. My own opinions.

I like the positioning around getting unstuck on one specific technical problem instead of offering generic interview prep. Live 1:1 help from senior engineers could be especially valuable for RAG debugging, system design, or LeetCode issues where tutorials don’t cover the exact blocker. Curious whether sessions are matched by specialty, like AI infra, backend, or interview prep.

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Founder of JustCC.to. AI scheduling assi...

What's the typical session structure when someone's stuck on an AI/ML problem specifically? LeetCode has a clear template (problem -> constraint -> solution), but AI debugging feels more open-ended - interested in how mentors scope a 1:1 there.

The niche focus here is strong solving real engineering blockers in real time is far more valuable than generic coding advice. Having access to experienced engineers for debugging architecture, AI pipelines, or tricky interview problems could save developers hours of frustration.

Interesting app we want more polished version

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Comments

We built Crackr for developers and AI engineers who are blocked on one problem and need a senior human right now, not another generic tutorial. Feedback on the positioning and best use cases is welcome.

nice. it would be good to have mentorship program too

custom-img
Tech, AI, Bitcoin, RSI. My own opinions.

I like the positioning around getting unstuck on one specific technical problem instead of offering generic interview prep. Live 1:1 help from senior engineers could be especially valuable for RAG debugging, system design, or LeetCode issues where tutorials don’t cover the exact blocker. Curious whether sessions are matched by specialty, like AI infra, backend, or interview prep.

custom-img
Founder of JustCC.to. AI scheduling assi...

What's the typical session structure when someone's stuck on an AI/ML problem specifically? LeetCode has a clear template (problem -> constraint -> solution), but AI debugging feels more open-ended - interested in how mentors scope a 1:1 there.

The niche focus here is strong solving real engineering blockers in real time is far more valuable than generic coding advice. Having access to experienced engineers for debugging architecture, AI pipelines, or tricky interview problems could save developers hours of frustration.

Interesting app we want more polished version