Prove your engineering skills — don't just talk about them
Practice real-world problems. Get structured feedback. Track your growth. Share your designs.
Build in public. Get forks and stars on your designs.
Publish your HLD/LLD solutions, share a public link, and let others fork your design. It’s the fastest way to prove architecture thinking — not just code.
The Problem
LeetCode exists for coding problems
But it's just algorithms. Not real machine coding.
Educative / Hello Interview exist for system design
But they're theoretical. Not hands-on practice.
No platform exists for end-to-end machine coding problems
The gap that actually matters for real engineering interviews.
All platforms are scattered. No real skill check. Too generic.
That's where BondIn comes in.
Developer Playground
End-to-end machine coding, LLD, and system design with real skill evaluation.
AI Interviewer
Real-time skill assessment with structured feedback on your problem-solving approach.
What BondIn Actually Does
Two ways to prove your engineering skills
Developer Playground
Real problems
System design, LLD, and machine-coding scenarios inspired by real interviews.
Structured evaluation
Clear feedback on trade-offs, design choices, and correctness — not vague scores.
Progress you can see
Track how your thinking improves across problems and time.
AI Interviewer
Real-time assessment
Practice with AI interviewers trained on FAANG company standards.
Structured feedback
Get detailed analysis of your problem-solving approach, code quality, and communication.
Company-specific practice
Practice with questions from top tech companies tailored to your skill level.
How It Works
Pick a real engineering problem
Choose from system design, LLD, or machine coding problems inspired by real interviews.
Solve it in the playground
Work through the problem with our interactive tools and AI assistance.
Get feedback & improve
Receive structured evaluation and actionable insights to level up your skills.
That's it.
For Experts
Monetize your engineering expertise
Help engineers prove their skills by offering mentorship, code reviews, and guidance on real-world problems. Build your reputation while earning from your expertise.
Schedule 1:1 Sessions
Offer personalized mentorship and code review sessions to engineers solving real problems.
Keep 94% of Earnings
Just 6% commission — significantly better than industry standards.
Multiple Revenue Streams
Earn through sessions, digital products, and courses.
Featured Courses
Awesome courses created by our expert mentors