Built by competitive programmers.
Petski (tutor to 200+ engineers, incl. FAANG hires) & Bale (IOI medalist)
Hoan
Software Engineer
“It was great working with Petar. He helped me get prepared for my technical interviews which landed me my current SWE job. Huge thanks!”
Gorazd
Software Engineer
“I can't even begin to describe how great of a teacher Petar truly is. Not only did he teach me everything I've been trying to learn from tutorials for the past 2 years, he also…”
Spice
Software Engineer
“Petar is an amazing instructor. Has deep knowledge of the fundamental programming concepts. He explains concepts in an easy way to understand. I now feel more confident to tackl…”
Product
Software Engineer
“Petar consulted me on a difficult leetcode problem, provided accurate and detailed explanation. He was polite, result-oriented, and a good teacher. I highly recommend him.”
Hoan
Software Engineer
“It was great working with Petar. He helped me get prepared for my technical interviews which landed me my current SWE job. Huge thanks!”
Gorazd
Software Engineer
“I can't even begin to describe how great of a teacher Petar truly is. Not only did he teach me everything I've been trying to learn from tutorials for the past 2 years, he also…”
Spice
Software Engineer
“Petar is an amazing instructor. Has deep knowledge of the fundamental programming concepts. He explains concepts in an easy way to understand. I now feel more confident to tackl…”
Product
Software Engineer
“Petar consulted me on a difficult leetcode problem, provided accurate and detailed explanation. He was polite, result-oriented, and a good teacher. I highly recommend him.”
Hoan
Software Engineer
“It was great working with Petar. He helped me get prepared for my technical interviews which landed me my current SWE job. Huge thanks!”
Gorazd
Software Engineer
“I can't even begin to describe how great of a teacher Petar truly is. Not only did he teach me everything I've been trying to learn from tutorials for the past 2 years, he also…”
Spice
Software Engineer
“Petar is an amazing instructor. Has deep knowledge of the fundamental programming concepts. He explains concepts in an easy way to understand. I now feel more confident to tackl…”
Product
Software Engineer
“Petar consulted me on a difficult leetcode problem, provided accurate and detailed explanation. He was polite, result-oriented, and a good teacher. I highly recommend him.”
Hoan
Software Engineer
“It was great working with Petar. He helped me get prepared for my technical interviews which landed me my current SWE job. Huge thanks!”
Gorazd
Software Engineer
“I can't even begin to describe how great of a teacher Petar truly is. Not only did he teach me everything I've been trying to learn from tutorials for the past 2 years, he also…”
Spice
Software Engineer
“Petar is an amazing instructor. Has deep knowledge of the fundamental programming concepts. He explains concepts in an easy way to understand. I now feel more confident to tackl…”
Product
Software Engineer
“Petar consulted me on a difficult leetcode problem, provided accurate and detailed explanation. He was polite, result-oriented, and a good teacher. I highly recommend him.”
Matt
Software Engineer
“He did an excellent job helping me with my code. The solutions were correct, and he took the time to explain them step by step, which made it much easier to learn. Very reliable…”
Jay
Software Engineer
“Petar digs deep into details and assesses where you are in your understanding. He has great examples and explains things in easy-to-understand but memorable ways. I can't recomm…”
Nikita
Competitive Programmer
“What a nice tutor. He'll set your competitive programming career just right. Highly recommend.”
Rodrick
Competitive Programmer
“Deep understanding of advanced concepts. Patient, insightful and detail oriented.”
Matt
Software Engineer
“He did an excellent job helping me with my code. The solutions were correct, and he took the time to explain them step by step, which made it much easier to learn. Very reliable…”
Jay
Software Engineer
“Petar digs deep into details and assesses where you are in your understanding. He has great examples and explains things in easy-to-understand but memorable ways. I can't recomm…”
Nikita
Competitive Programmer
“What a nice tutor. He'll set your competitive programming career just right. Highly recommend.”
Rodrick
Competitive Programmer
“Deep understanding of advanced concepts. Patient, insightful and detail oriented.”
Matt
Software Engineer
“He did an excellent job helping me with my code. The solutions were correct, and he took the time to explain them step by step, which made it much easier to learn. Very reliable…”
Jay
Software Engineer
“Petar digs deep into details and assesses where you are in your understanding. He has great examples and explains things in easy-to-understand but memorable ways. I can't recomm…”
Nikita
Competitive Programmer
“What a nice tutor. He'll set your competitive programming career just right. Highly recommend.”
Rodrick
Competitive Programmer
“Deep understanding of advanced concepts. Patient, insightful and detail oriented.”
Matt
Software Engineer
“He did an excellent job helping me with my code. The solutions were correct, and he took the time to explain them step by step, which made it much easier to learn. Very reliable…”
Jay
Software Engineer
“Petar digs deep into details and assesses where you are in your understanding. He has great examples and explains things in easy-to-understand but memorable ways. I can't recomm…”
Nikita
Competitive Programmer
“What a nice tutor. He'll set your competitive programming career just right. Highly recommend.”
Rodrick
Competitive Programmer
“Deep understanding of advanced concepts. Patient, insightful and detail oriented.”
Available Paths
INTERVIEW TRACK
Interview prep & LC daily
Each item is a node (problem/topic/pattern/lesson) in one dependency graph.
- See what's connected (prereqs + next steps)
- Build a mind map as you go
- Learn concepts, not memorized solutions
CONTEST TRACK
Competitive Programming
Post-contest solutions + competitive programmer insights, connected across techniques in the graph.
- Immediate solutions + reasoning
- Implementation pitfalls + edge cases
- Track techniques as nodes (prereqs → next)