Your Ultimate Preparation Hub
at Architect Level
60,000+
Engineers learning DSA, AI & DevOps with Prince Singh
From free DSA sheets and AI Engineering roadmaps to 1:1 mentorship with a practising AI Architect — everything you need to break into top tech companies.
1.2K+ Followers
@PrinceSinghHub
68K+ Followers
@PrinceSingh
10K+ Subscribers
@princesinghcse
68K+ Liked
Total YouTube Videos
120K+ Views
Total YouTube Views
DSA · AI Engineering · System Design One Platform
Six structured paths from DSA fundamentals to production AI systems built and taught by a practising AI Architect. Free forever, no paywalls.
STRUCTURED DSA SHEETS
Curated Problems, Progressive Learning
150 carefully structured problems across 3 sprints - from basic math and logic to real interview challenges. Built for students who want a clear, zero-to-interview-ready path without the noise.
AI ENGINEER ROADMAP
Zero to Production AI in 2026
Built by a practising AI Architect. 17 phases, 51 hands-on projects - Python, LLMs, RAG pipelines, AI Agents, Fine-tuning with LoRA, and MLOps. The most complete AI Engineering roadmap anywhere, covering what teams actually ship in production.
PATTERN-BASED DSA
Recognize Patterns, Solve Any Problem
Stop memorizing solutions - start recognizing patterns. Sliding window, two pointers, BFS/DFS, trees, graphs, dynamic programming - organized so your brain builds real intuition for FAANG-level interviews.
1:1 EXPERT MENTORSHIP
Guidance From an AI Architect & SDE
Book a session with Prince Singh - AI Architect, Founding Engineer - for DSA roadmap reviews, AI career strategy, mock interviews, resume feedback, and real advice from someone actively building at the frontier.
FREE RESOURCES HUB
DSA, AI, DevOps & System Design Guides
Hand-picked YouTube videos, in-depth blog articles, and guides on DSA, AI Engineering, DevOps, and System Design - 100% free, no paywalls. Quality tech education should be accessible to every engineer regardless of background.
COMMUNITY & SUPPORT
1,00,000+ Engineers Learning Together
Join the fastest-growing community of engineers learning DSA, AI, DevOps, and SDE skills together. Share progress, ask questions, and stay consistent - you're not on this journey alone.
The Man Behind It
Tier 3 College.
10+ Remote Jobs, AI Architect.
Hey! I'm Prince Singh. I came from a Tier 3 college with no senior, no network, no roadmap. Just raw hunger to figure it out.
I cracked 10+ remote SDE jobs not because I was the smartest in the room, but because I built the right systems, followed the right patterns, and never stopped shipping.
Today I build production AI systems LLMs, RAG pipelines, Multi-Agent architectures at a Founding Engineer level. And I teach everything I know on Preparation Street, for free.
DSA, AI Engineering, DevOps, System Design the exact roadmap I wish someone had given me when I was starting out.
1,00,000+ engineers already on this journey. Come build with us.
@princesinghcse
|10K+ subscribersDSA, AI Engineering, DevOps & System Design free for everyone
Prince Singh
|68K+ followersAI Architect · Founding Engineer · Building Preparation Street

100K+
Community
40K+
Sessions
4.98/5
Rating
Hustlers that turned around
their careers & became Coders
1,00,000+ Learners!
and growing every day
Anand
Prince is a wonderful person. He listened to all my requirements very carefully without any interrupt. He then suggested a career option which was most relevant to my current situation, closest to reality. He is one gem and he is the best if you want either career or technical guidance
mentorship/Guidance
Sourav Upadhyay
The mentorship session really helped me gain clarity on my path. I not only got answers to my doubts but also understood how to properly use available resources and start working on meaningful projects in Python and AI/ML. What I appreciated the most was how patiently the mentor guided me through the parts where I used to get stuck while following tutorials. It was a very motivating and direction-setting experience for me. Thank you for this amazing mentorship Prince Bhaiya ❤️🙏🙇
mentorship/Guidance
Aman Goyal
Great Session, It looked like he wanted to help me out and not just end the session after 30 mins. If you want a clear Idea on How to improve in DSA or How to become a better SWE then I highly recommend Prince.
mentorship/Guidance
NAGEN BISWAL
Prince is an exceptional mentor and a highly skilled engineer. His deep clarity across various fields sets him apart, and he has cleared all my questions. He not only addressed all my doubts but also provided insightful suggestions and practical solutions that exceeded my expectations. His guidance has been truly valuable. If you’re looking for a knowledgeable mentor who offers real, hands-on learning experiences, I highly recommend booking a session with Prince on Topmate. You won’t be disappointed!
mentorship/Guidance
Anshu Kushwaha
I totally agree with this sheet; it's really very helpful. When I started DSA, problem-solving was tough for me, but after going through this sheet, my confidence grew, and my problem-solving skills improved significantly. Thank you so much, bhaiya! ❤️✨
Programming Street - 150
Hamzah Ali
This is a life-changing resource! I started DSA thanks to Prince, and I've been consistent for two months now. The guidance has been invaluable. I'm now looking forward to making a switch to development roles. Thank you for everything, bhaiya!
Programming Street - 150
Rishabh Jain
This sheet is a game-changer for beginners. It helped me improve my logical thinking, and I was able to solve problems more confidently. The explanations are clear, and the resources provided are top-notch. Keep up the great work!
Programming Street - 150
Abhishek Kumar
The 150-sheet DSA guide was amazing! It really boosted my problem-solving approach. College teaches advanced concepts like 3D arrays, but this guide helped me get the basics right. Thanks a ton, bhaiya!
Programming Street - 150
Mohd Kamran
This resource is extremely helpful, especially for students from non-CS backgrounds like me. It's a perfect starter pack before diving into advanced DSA topics. I'm eagerly waiting for more DSA content like this. Thank you, Prince!
Programming Street - 150
Muzammil
He is clear and very very friendly, gave me a clear path. After talking to him, I think I am in right path with few modifications. Hope to see you soon prince. Highly recommend..!
mentorship/Guidance
RITIKA SEHGAL
This Topmate mentor is truly exceptional! Prince made me feel comfortable, thoroughly understood where I lacked in DSA preparation, and offered invaluable advice on landing a job. His sense of humor and inspiring journey as a recent 2024 Tier 3 graduate make him incredibly relatable and motivating. I've met several mentors before, but none understood me as well as he did. He boosted my confidence and provided practical strategies. Highly recommended for anyone seeking genuine guidance and support. Just go for his mentorship; you won't regret it!
mentorship/Guidance
Tushar Uthane
Spent best time, most informative 20mins of my life amazing guidance got a clear path for my future.
mentorship/Guidance
Prince Verma
Prince bhaiya give me clarity about my future in a very kind and friendly way he is just like a big bro...big bro from another mother
mentorship/Guidance
Rahul Thakur
It was a great conversation with Prince. He has given me a clear understanding of my query and a clear roadmap for DSA, including where I should star. His answers were straightforward. I would love to connect again with some progress. He also reviewed my resume and suggested some amendments in resume. Thanks Prince
mentorship/Guidance
Darshan R
He treated me as a friend and guided me towards my goal step by step. Cleared my doubts regarding placements with at most patience. Such a great mentor to present and future developers. Thank you bhaiya/sir
mentorship/Guidance
John Paul
I just listened to what I needed to hear & it helped. As a troubled IT professional, Prince made me realize that it's okay for things to go wrong & good things take time. He also assisted me in guiding through remote jobs & how I should focus on improving my skills.
mentorship/Guidance
Shashaank
Big thanks to you brother for offering free DSA resources! Their help has been invaluable in clarifying concepts and improving my skills. Highly recommended!
mentorship/Guidance
Suraj Maurya
Even if it cost 10000, it’s worth more than that.
mentorship/Guidance
Ankan Das
Bhaiya gave his number and asked me to feel free to message him. He is generous and helpful.
mentorship/Guidance
Satyam Singh
You're such an amazing person. You understand and guide me in such a way that I can't forget for my whole life. Just one more thing... Thank you from the bottom of my heart 🙏❤️
mentorship/Guidance
Bheesha Kumari
He has a very different way of mentoring than most people, guiding in a very realistic manner considering your situation. Very helpful and insightful session!
mentorship/Guidance
Ashes Khan
He understands your points deeply and gives you valuable feedback, also guiding you properly on what to do at this phase. His guidance is really helpful.
mentorship/Guidance
Shipra Kushwaha
He is very friendly😄, the way he explains every minute detail is amazing. I am very glad that I joined the session. He gives his precious time without taking any money, huge respect to you Prince!
mentorship/Guidance
Ruchika Das
It was a wonderful session. I was able to ask all the queries I had. All the doubts that I was having were cleared. I'm truly thankful for all the advice, and I believe it will help me a lot in my work. Thank you so much for the guidance, and wishing you all the best.
mentorship/Guidance
Anand
Prince is a wonderful person. He listened to all my requirements very carefully without any interrupt. He then suggested a career option which was most relevant to my current situation, closest to reality. He is one gem and he is the best if you want either career or technical guidance
mentorship/Guidance
Sourav Upadhyay
The mentorship session really helped me gain clarity on my path. I not only got answers to my doubts but also understood how to properly use available resources and start working on meaningful projects in Python and AI/ML. What I appreciated the most was how patiently the mentor guided me through the parts where I used to get stuck while following tutorials. It was a very motivating and direction-setting experience for me. Thank you for this amazing mentorship Prince Bhaiya ❤️🙏🙇
mentorship/Guidance
Aman Goyal
Great Session, It looked like he wanted to help me out and not just end the session after 30 mins. If you want a clear Idea on How to improve in DSA or How to become a better SWE then I highly recommend Prince.
mentorship/Guidance
NAGEN BISWAL
Prince is an exceptional mentor and a highly skilled engineer. His deep clarity across various fields sets him apart, and he has cleared all my questions. He not only addressed all my doubts but also provided insightful suggestions and practical solutions that exceeded my expectations. His guidance has been truly valuable. If you’re looking for a knowledgeable mentor who offers real, hands-on learning experiences, I highly recommend booking a session with Prince on Topmate. You won’t be disappointed!
mentorship/Guidance
Anshu Kushwaha
I totally agree with this sheet; it's really very helpful. When I started DSA, problem-solving was tough for me, but after going through this sheet, my confidence grew, and my problem-solving skills improved significantly. Thank you so much, bhaiya! ❤️✨
Programming Street - 150
Hamzah Ali
This is a life-changing resource! I started DSA thanks to Prince, and I've been consistent for two months now. The guidance has been invaluable. I'm now looking forward to making a switch to development roles. Thank you for everything, bhaiya!
Programming Street - 150
Rishabh Jain
This sheet is a game-changer for beginners. It helped me improve my logical thinking, and I was able to solve problems more confidently. The explanations are clear, and the resources provided are top-notch. Keep up the great work!
Programming Street - 150
Abhishek Kumar
The 150-sheet DSA guide was amazing! It really boosted my problem-solving approach. College teaches advanced concepts like 3D arrays, but this guide helped me get the basics right. Thanks a ton, bhaiya!
Programming Street - 150
Mohd Kamran
This resource is extremely helpful, especially for students from non-CS backgrounds like me. It's a perfect starter pack before diving into advanced DSA topics. I'm eagerly waiting for more DSA content like this. Thank you, Prince!
Programming Street - 150
Muzammil
He is clear and very very friendly, gave me a clear path. After talking to him, I think I am in right path with few modifications. Hope to see you soon prince. Highly recommend..!
mentorship/Guidance
RITIKA SEHGAL
This Topmate mentor is truly exceptional! Prince made me feel comfortable, thoroughly understood where I lacked in DSA preparation, and offered invaluable advice on landing a job. His sense of humor and inspiring journey as a recent 2024 Tier 3 graduate make him incredibly relatable and motivating. I've met several mentors before, but none understood me as well as he did. He boosted my confidence and provided practical strategies. Highly recommended for anyone seeking genuine guidance and support. Just go for his mentorship; you won't regret it!
mentorship/Guidance
Tushar Uthane
Spent best time, most informative 20mins of my life amazing guidance got a clear path for my future.
mentorship/Guidance
Prince Verma
Prince bhaiya give me clarity about my future in a very kind and friendly way he is just like a big bro...big bro from another mother
mentorship/Guidance
Rahul Thakur
It was a great conversation with Prince. He has given me a clear understanding of my query and a clear roadmap for DSA, including where I should star. His answers were straightforward. I would love to connect again with some progress. He also reviewed my resume and suggested some amendments in resume. Thanks Prince
mentorship/Guidance
Darshan R
He treated me as a friend and guided me towards my goal step by step. Cleared my doubts regarding placements with at most patience. Such a great mentor to present and future developers. Thank you bhaiya/sir
mentorship/Guidance
John Paul
I just listened to what I needed to hear & it helped. As a troubled IT professional, Prince made me realize that it's okay for things to go wrong & good things take time. He also assisted me in guiding through remote jobs & how I should focus on improving my skills.
mentorship/Guidance
Shashaank
Big thanks to you brother for offering free DSA resources! Their help has been invaluable in clarifying concepts and improving my skills. Highly recommended!
mentorship/Guidance
Suraj Maurya
Even if it cost 10000, it’s worth more than that.
mentorship/Guidance
Ankan Das
Bhaiya gave his number and asked me to feel free to message him. He is generous and helpful.
mentorship/Guidance
Satyam Singh
You're such an amazing person. You understand and guide me in such a way that I can't forget for my whole life. Just one more thing... Thank you from the bottom of my heart 🙏❤️
mentorship/Guidance
Bheesha Kumari
He has a very different way of mentoring than most people, guiding in a very realistic manner considering your situation. Very helpful and insightful session!
mentorship/Guidance
Ashes Khan
He understands your points deeply and gives you valuable feedback, also guiding you properly on what to do at this phase. His guidance is really helpful.
mentorship/Guidance
Shipra Kushwaha
He is very friendly😄, the way he explains every minute detail is amazing. I am very glad that I joined the session. He gives his precious time without taking any money, huge respect to you Prince!
mentorship/Guidance
Ruchika Das
It was a wonderful session. I was able to ask all the queries I had. All the doubts that I was having were cleared. I'm truly thankful for all the advice, and I believe it will help me a lot in my work. Thank you so much for the guidance, and wishing you all the best.
mentorship/Guidance
Farhan Ali
The meeting was outstanding and insightful. I appreciated his friendly demeanor and how he understood my questions, addressing them according to my needs. It was truly helpful and preferable for me.
mentorship/Guidance
Anshu kushwaha
I totally agree with this sheet its really very helpful bhaiya. 🙌🏻 Jab main DSA start kra tha to bahoot mushkil ho rhi thi problem solving me and after that jab maine sheet kra then confidence level ke saath saath av meri probelm solving bhi improve ho rhi h. Thanks a lot bade bhaiya ❤️✨
Programming Street - 150
Hamzah Ali
Bhaiya you are my life changer aapke vaise DSS start kiya maine abhi tak main 2 mahine se abhi main Abhi Tak Main consistent hun
Programming Street - 150
Ankit Kumar Shahi
It's just great it really improved my problem solving approach; it's just great
Programming Street - 150
Mohd Kamran
This is very very useful sheet for those students who is not from CS background and doing MCA like me , before starting proper DSA it is starter pack which must take everyone.
Programming Street - 150
Harsh
Amazing sheet for beginners
Programming Street - 150
Priya Suresh Chauhan
Currently in 3rd year Computer engineering As I have not completed yet but still doing it. It helps to give motivation and seat for next hours😌. Thanks a lot bhaiya for doing lot for us. Sach bolu tho aapke liya thanks bhi kaam hai😊. I want to meet onces in a life. Chalo placement ke baad jarur🤗
Programming Street - 150
Rishabh Jain
It was great for beginners perspective. It helped me improve my logic.
Programming Street - 150
Gaurav Soni
The sheet is very helpful for the initials of DSA problem solving
Programming Street - 150
Mayank Bajaj
Such as amazing and interactive community
Programming Street - 150
Abhishek Kumar
150 sheet wad good i have learned a lot..and found even finding gcd is not as that easy as we think .. And in college they r trying to teach 3d array instead of helping students to solve these basic stuffs first ..thnks a lot 🛤️for this
Programming Street - 150
Yash Paliwal
It is really helpful for my problem solving skills , now I am getting logic easily.
Programming Street - 150
Rohan Parihar
I just started exploring this content. Keep it up, good work
Programming Street - 150
Rajesh
Questions are good for beginner
Programming Street - 150
Simran Garg
Overwhelming by receiving such an extraordinary sheet of all the required important questions!
Programming Street - 150
Pratham Shinde
Your way of staring the session and creating a friendly environment is very great! Great communication with you brother! Loved your thoughts and heads off to your struggle! Keep growing & motivating!
mentorship/Guidance
Rihan Mulani
He provided concise, effective guidance on optimizing my tech stack and navigating interpersonal interactions effortlessly. What a gem of a guy!
mentorship/Guidance
Nilesh Patidar
Talking to you was really worth it. I was confused about my career, but after your mentorship, I feel more confident. You've cleared many doubts for me, and I appreciate it.
mentorship/Guidance
Sandeep
Best guidance session ever!! Got various insights into the current market trend!!
mentorship/Guidance
Nikhil Sharma
I love the very friendly and open nature of Prince bhaiya. He talked to me like an elder brother. It was an amazing experience for me. I learned a lot from his experiences. Thanks bhaiya.
mentorship/Guidance
Pranav Muley
That's a great experience, giving a proper path for DSA which is impactful to learners. In this world, so few people help students find the right path without any fees. I appreciate it a lot... I really enjoyed it. I will definitely recommend my friends to get a 1:1 mentorship session to clear their path.... At last, thank you 🙏🙏 once again...
mentorship/Guidance
Naveen Kumar Goli
It was a great meeting with you bro. The way you explain the things that you had experienced in your life was immense... The knowledge you have about the tech stack is really excellent and the way you guide to manage time is truly inspiring. Thank you so much for sharing your valuable time... I hope this meeting won't be the last...🤝🏻😊
mentorship/Guidance
Nitin Jhajharia
Absolutely great session, got so many insights not only on placements and coding but also on different aspects of life. Very down-to-earth person giving his best to serve us all :)
mentorship/Guidance
Farhan Ali
The meeting was outstanding and insightful. I appreciated his friendly demeanor and how he understood my questions, addressing them according to my needs. It was truly helpful and preferable for me.
mentorship/Guidance
Anshu kushwaha
I totally agree with this sheet its really very helpful bhaiya. 🙌🏻 Jab main DSA start kra tha to bahoot mushkil ho rhi thi problem solving me and after that jab maine sheet kra then confidence level ke saath saath av meri probelm solving bhi improve ho rhi h. Thanks a lot bade bhaiya ❤️✨
Programming Street - 150
Hamzah Ali
Bhaiya you are my life changer aapke vaise DSS start kiya maine abhi tak main 2 mahine se abhi main Abhi Tak Main consistent hun
Programming Street - 150
Ankit Kumar Shahi
It's just great it really improved my problem solving approach; it's just great
Programming Street - 150
Mohd Kamran
This is very very useful sheet for those students who is not from CS background and doing MCA like me , before starting proper DSA it is starter pack which must take everyone.
Programming Street - 150
Harsh
Amazing sheet for beginners
Programming Street - 150
Priya Suresh Chauhan
Currently in 3rd year Computer engineering As I have not completed yet but still doing it. It helps to give motivation and seat for next hours😌. Thanks a lot bhaiya for doing lot for us. Sach bolu tho aapke liya thanks bhi kaam hai😊. I want to meet onces in a life. Chalo placement ke baad jarur🤗
Programming Street - 150
Rishabh Jain
It was great for beginners perspective. It helped me improve my logic.
Programming Street - 150
Gaurav Soni
The sheet is very helpful for the initials of DSA problem solving
Programming Street - 150
Mayank Bajaj
Such as amazing and interactive community
Programming Street - 150
Abhishek Kumar
150 sheet wad good i have learned a lot..and found even finding gcd is not as that easy as we think .. And in college they r trying to teach 3d array instead of helping students to solve these basic stuffs first ..thnks a lot 🛤️for this
Programming Street - 150
Yash Paliwal
It is really helpful for my problem solving skills , now I am getting logic easily.
Programming Street - 150
Rohan Parihar
I just started exploring this content. Keep it up, good work
Programming Street - 150
Rajesh
Questions are good for beginner
Programming Street - 150
Simran Garg
Overwhelming by receiving such an extraordinary sheet of all the required important questions!
Programming Street - 150
Pratham Shinde
Your way of staring the session and creating a friendly environment is very great! Great communication with you brother! Loved your thoughts and heads off to your struggle! Keep growing & motivating!
mentorship/Guidance
Rihan Mulani
He provided concise, effective guidance on optimizing my tech stack and navigating interpersonal interactions effortlessly. What a gem of a guy!
mentorship/Guidance
Nilesh Patidar
Talking to you was really worth it. I was confused about my career, but after your mentorship, I feel more confident. You've cleared many doubts for me, and I appreciate it.
mentorship/Guidance
Sandeep
Best guidance session ever!! Got various insights into the current market trend!!
mentorship/Guidance
Nikhil Sharma
I love the very friendly and open nature of Prince bhaiya. He talked to me like an elder brother. It was an amazing experience for me. I learned a lot from his experiences. Thanks bhaiya.
mentorship/Guidance
Pranav Muley
That's a great experience, giving a proper path for DSA which is impactful to learners. In this world, so few people help students find the right path without any fees. I appreciate it a lot... I really enjoyed it. I will definitely recommend my friends to get a 1:1 mentorship session to clear their path.... At last, thank you 🙏🙏 once again...
mentorship/Guidance
Naveen Kumar Goli
It was a great meeting with you bro. The way you explain the things that you had experienced in your life was immense... The knowledge you have about the tech stack is really excellent and the way you guide to manage time is truly inspiring. Thank you so much for sharing your valuable time... I hope this meeting won't be the last...🤝🏻😊
mentorship/Guidance
Nitin Jhajharia
Absolutely great session, got so many insights not only on placements and coding but also on different aspects of life. Very down-to-earth person giving his best to serve us all :)
mentorship/Guidance
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