I'm Santiago, a systems engineering student who dedicates his free time to researching the security of smart contracts and systems in general. Earlier this year, I dove deep into the theory behind zero-knowledge proofs, with the ZK Book as my primary resource. Wanting to take the next step and put that theory into practice, I didn’t hesitate to join the Circom Bootcamp as soon as it was announced. RareSkills’ strong reputation in the industry and...

I joined the Circom bootcamp after great experience with RareSkills' Advanced Solidity one, because I want to master ZK Great mix of live tutoring, reading written materials and watching videos. Homework was challenging as expected and I really appreciate it. That's the best way to master the topic in my opinion. Attending this bootcamp helped me add another valuable skill to my skillset.

I’m a former finance executive transitioning into Web3. I joined the 3 week RareSkills Rust Bootcamp to gain a strong introduction to writing safe smart contracts and understanding security auditing best practices in Rust. Having followed RareSkills’ insightful blog content for some time, I trusted their team to deliver a well-crafted learning plan. With a couple of months of self-taught Rust under my belt, I saw the 3-week bootcamp as the ideal opportunity to deepen...

Block is a great Solidity instructor. What I appreciated most about his program is that he always checked our understanding of prior materials before moving onto more challenging topics. He rightly emphasizes the importance of understanding real-world exploits and how to audit.

I joined the ZK bootcamp last September 2024, and I was put in Jeff's cohort. I really think that Jeff is a talented instructor. I never had any problems with learning ZK when I joined RareSkills. The math part was explained to me quite well; I can understand it, and I have a better grasp of the math behind ZK. Thanks to Jeff, João, and the rest of his team. I would recommend any serious...

BlockChomper was a great course teacher who lead us through a wide variety of Solidity best practices, and security exploits. Would recommend the course to anyone who is looking to level up in the key principles of blockchain development and Security.

This was a great introductory course to Rust. I would have liked it to be a bit longer to dive deeper into some of the topics, but overall it provided a solid foundation. Daniel was an excellent instructor—always helpful, approachable, and committed to making sure we got the most out of each class. I’d definitely recommend it to anyone starting out with Rust. I really enjoyed the one-on-one sessions. Daniel was incredibly helpful, and I...

I attended the Rust BootCamp course taught by Daniel Cumming. It was a very useful, and well taught course, that would be useful to anyone new, or beginner or even intermediate to Rust. I highly recommend this BootCamp as an effective way to start with Rust. Daniel was a very effective teacher. He kept the course very interactive. I never felt that I was unable to follow or falling behind. I felt comfortable asking questions...

I'm Alexandre, what made me join the bootcamp was the RareSkills zk-book, it was a really good content, but hard to understand without some previous knowledge, so having a teacher going step by step would be easier to understand. My learning experience was amazing, i could see all the effort that was put into it, the teacher was really prepared and we could tell that he was really trying to make us all understand everything,...

The Rust Bootcamp provided a strong foundation, both through the instructors and the course structure. I believe having a solid foundation is crucial to tackle and understand the more advanced topics in Rust, and this program really delivered on that. The instructor was very supportive throughout the sessions and always clear and to the point. I especially appreciated how each concept was backed with solid reasoning. I’m still working toward growing my Rust skills through...

My name is Nikos Iliakis and I'm an auditor. I joined RareSkills advanced solidity bootcamp in order to fill my gaps in the smart contracts ecosystem (solidity, evm, etc.). The material provided is great and very well organised and helped diving into the subject fast and go into depth. The 1:1 was very useful mostly because of the feedback of the instructor who had great knowledge of the topics. It's awesome to be part of...

Hey, I'm Tommaso. I am a security researcher in EVM, and I want to talk about RareSkills today. I took the RareSkills Advanced Solidity Bootcamp because after my university finished—actually, I'm a computer engineer—I wanted to give a boost to my Web3 career with an academic imprint. The best course I found, after comparing a lot of courses and reading a lot of reviews, was the RareSkills one. I am a fan of Jeffrey's courses...

I joined this bootcamp to improve my rust skills in order to be able to do Solana code. Yeah, it was great. I think it makes my expectation. I learned some deep things about rust is that they needed to learn, maybe I would have liked more security examples, but three classes it was really good, really good about the 1 on 1 session. But overall Danielle was really great and we can feel it...

Currently working as a Lead Security Engineer. I joined the Rust Bootcamp to deepen my understanding of how Rust works, especially as a strong foundation for working with Rust-based blockchains. Had a great experience participating in the Rust bootcamp. Daniel did an excellent job presenting all the Rust topics with clarity and depth. The delivery of knowledge was top-notch - no surprise, that’s the trademark of RareSkills. Highly recommended! Attending the bootcamp sharpened my understanding...

I joined the RareSkills bootcamp as a way to test my knowledge, and as a better way to grow my technical skills The learning experience was great and way above expectations, the instructor was amazing and with great knowledge on the field, live sessions and one on one code reviews were really helpful to help get deep knowledge of the advanced topics we talked about Joining the bootcamp has definitely improved my coding skills, and...

Wanted to understand zk better after accepting a job at a zk company Jeffery and João are incredible teachers. The written material is comprehensive and done well. The exercises are also thought provoking and helpful. It made me much more equipped for my new job. I would tell them I found the bootcamp to be worth the $$ and the best comprehensive intro to the space that I have found.

I'm wuchuan, a blockchain security engineer at OKX. I joined the Rareskills Rust bootcamp because I was looking to learn more about Rust and Solana from a security researcher's point of view. The overall learning experience was very alike being back at University, except I know that the teacher has a proven track record in Web3 Security. Zigtur being the top earner on Cantina was evident through his insights beyond the topics covered. In terms...

As a security researcher with prior experience only in Solidity, this bootcamp was excellent at quickly bringing me up to speed with Rust and all its intricacies. The bootcamp hit the sweet spot between theory and hands on work, with exercises that actually prepared me to find real security issues. Shortly after completing the bootcamp, I managed to win the first Rust audit competition I participated in.

Before joining the Solidity Bootcamp, I had six years of experience as a developer but limited time for self-learning due to my full-time job. RareSkills provided the structure, depth, and expert guidance I needed to break into blockchain development efficiently. The curriculum was rigorous, the mentorship was top-tier, and the hands-on experience was invaluable. Without this program, I would have spent years trying to piece everything together on my own. If you’re serious about Solidity...

I'm Federico, a Full Stack Typescript developer working at Lit Protocol. I joined the rust bootcamp to learn how rust works and how it is used in blockchains. The experience was great. A good intro to the rust language, which has quite some differences with any other language out there. And some insights into how it works in blockchains and the issues it can have. Instructor Daniel clearly has some skills and he really pushed...

I am a Computer and Data Scientist that joined the Rust bootcamp in the January 2025 cohort. The course’s fast-paced, intensive structure was exactly what I appreciated. Additionally, there was a security and smart-contract focus in the homeworks which exposed me in the auditor mindset and also several blockchains such as Solana, NEAR, Soroban, Starknet and their way of accomplishing things. The one-on-one sessions were probably the biggest ROI of this course, as I learnt...

I am a security researcher specialized in fuzzing and formal verification. Now I'm interested in the realm of Rust-based blockchains, which is why I joined the Rust bootcamp on January 2025. I really enjoyed the pace of the course, since it was not too demanding nor too easy. It was just perfect. I also liked the live classrooms and the 1on1 sessions with the instructor. So far I haven't had the time to put my...

My name Favour also know as 0xFave, I am a security researcher, I joined rust bootcamp so I can learn more about how to go about with rust auditing The learning experience was great as I got to know some of the unknowns that I don't know, zigtur was very helpful in explaining every of this details accordingly and help in filling the knowledge gaps I have. The 1 on 1 session are lovely as...

Exploring Rust security with Zigtur, part of the new wave of leaders in web security, was transformative. We uncovered Solana vulnerabilities, dissected Anchor’s framework, and tackled edge cases—lessons that only resonate when you take the time to dive in and absorb the details. The insights and connections gained from this group are invaluable.

Safi, Blockchain lead at Nunet, I joined the bootcamp to wrap my head around the moon math related to ZK The bootcamp was amazing everything was laid out very clearly and in a way that it all tied very nicely at the end For me the impact has been two folds, one I believe I will now be able to take this knowledge and help contribute to NuNet in a way that improves the trust...

Joined the bootcamp to sharpen my EVM knowledge and enter the Blockchain industry The learning experience was amazing, the materials were very well written and my cohort teacher Gonçalo (gmhacker) had a great wealth of knowledge and knew how to share it. He was always very invested as well in making sure we could follow when explaining complex topics and gave a lot of valuable feedback during the one-on-one sessions and went beyond the pure...

Studying at RareSkills has been the best ROI in my blockchain/crypto journey When I joined the Advanced Solidity Bootcamp, I had only a superficial knowledge of Solidity and EVM. Being able to speedrun all of the hard stuff, such as CTFs, Assembly, Gas Optimizations, AMMs, and ECDSA, in less than 6 months, while doing it by myself would have taken 2x or 3x that time, was super valuable for me.It's not only the quality of...

Zero Knowledge Bootcamp Review: A Journey from Confusion to Clarity After struggling to grasp Zero Knowledge proofs through online resources, I decided to enroll in this specialized bootcamp, and it proved to be a transformative decision. The program's standout feature was its personalized approach, providing weekly one-on-one sessions with a dedicated tutor who could address my specific learning challenges. This individualized attention made a significant difference in my understanding of complex ZK concepts. What truly...

My name is Walter Cavinaw. I work at Gauntlet as a Data Scientist for Aera Strategies. I joined the bootcamp to transition from TradFi into DeFi. The RareSkills solidity course was the best investment for career progression. The focus on deep understanding of the EVM from first principles provided a firm foundation on which to expand into core standards and well-known protocols. The teaching style is what makes this stand out. The instructors themselves have...

If you have ever felt FOMO from all the zk moon math talk, just take RareSkills zk bootcamp. Yes, they have published superb free public reading materials, but you will learn much better with live, well-paced customized lessons, and the 1:1 homework feedback. Even if you do not have concrete plans to use zk in your professional work, the zk bootcamp will help you achieve a much deeper understanding and appreciation of the EVM ecosystem...

This ZK Bootcamp has been the best introduction to ZK I've found so far. It has given me the exact blend of theory and practical experience that I was looking for. The assignments were well thought out and helped cement the core concepts of every class. Overall I'd highly recommend this course to anyone who has been trying to get into ZK and has been getting bamboozled by its apparent complexity. The community was very...

Zero knowledge proofs are hands down the most difficult topic to master in web3. The RareSkills zk bootcamp is a 9 weeks hands-on program that covers everything. Basic Math concepts to implementation details of real-world zk protocols. Thanks to tons of practical exercises, Jeffrey’s easily understandable explanations and his one-on-one support, I developed a fundamental understanding of the topic and was able to implement Groth16 from scratch at the end of the course.

Not my first attempt to dig into ZK thing but with RareSkills. It was my first successful attempt. The rest of the things like old materials that they have on YouTube have marks and signs. Of course they didn't provide me more programmers experience, I'd say. So it was more like math related rather than programming related. In RareSkills. It's both sides. You have no math to the programming, which is great, because I am...

Overall, my experience with RareSkills was really great. I thought the material was paced very well. I really enjoyed that we had the pre-course material to ensure everyone was on the same page when they started. I found Jeff to be a knowledgeable teacher and always willing to answer students' questions, including my own. I also really liked the opportunities to help each other out via the Slack channel. The entire Slack experience was really...

The Rareskills Solidity bootcamp stands out as one of the few advanced Solidity courses available. As someone eager to elevate my Solidity/EVM expertise, I found this course to be incredibly rewarding. The course materials delved into the intricacies of the EVM, enabling me to deepen my understanding significantly. This newfound knowledge proved invaluable in my job as a smart contract auditor, helping me to become more effective in detecting bugs and vulnerabilities in Solidity codebases....

My name is Andrej Rakic, I am blockchain engineer at Chainlink Labs and I joined RareSkills' Advanced Solidity Bootcamp to sharpen my EVM & Solidity knowledge. After I announced that I had completed the course, I was asked: "Aren't you already good with Solidity?". And I definitely am - I scored 80% on the entry test, for example. However, I've still learned so much new stuff that I can't express how grateful I am. I...

Learning at RareSkills was an awesome experience. Jeffrey is the instructor I learned from, has a really deep knowledge of web3 technologies like solidity or zero knowledge proofs. One-on-one reviews with him were really helpful. More-over i’ve met amazing classmates, they always did their best to help me and were really kind. Next week i will start my new job as a web3 security auditor. Learning solidity and solidity security at RareSkills helped me to...

When I started the Rareskills advanced solidity program, I had about 1 year of work experience as a blockchain security engineer / auditor. Throughout the program, I was constantly learning new skills that would help me in my day to day job as a smart contract auditor. I consistently referred to the material I learned from Rareskills to help me with the audits that I was doing for work. The instructors are some of the...

I highly recommend RareSkills ZK bootcamp. I have read most RareSkills articles by now and I am always impressed by the great quality. That was the primary reason why I enrolled in the ZK bootcamp as soon as I had some free time. The quality of the bootcamp matched my expectation. Although all the materials are freely available in the ZK book, the bootcamp makes the learning easier by breaking down a hard task into...

I joined the zero knowledge course in order to improve my understanding of the mathematics behind groth16, and to practice constraint-based programming for verifying large-scale computations. The learning experience was excellent. When learning groth16, we first focused on fundamental concepts such as encrypted quadratic arithmetic programs and pairing-based cryptography. This made applying the final transformations that yield groth16 highly understandable. This course has improved my understanding of when and how to use the different approaches...

I finally completed my zk bootcamp from @RareSkills_io . I spent 6 months trying to learn it on my own and failed miserably. After this bootcamp I'm confident with zk math and comfortable learning new concepts on my own. @Jeyffre is an amazing instructor. I highly recommend this bootcamp if you are interested in zk.

I recently completed the Advanced Solidity program, and I wanted to share my thoughts on the program with you. To begin with, I must say that I was thoroughly impressed with the program. Despite having five years of experience in Blockchain, I learned a great deal from it. The program covered a range of topics, including EVM bytecode, security, testing, mutation, assembly, and optimization, to name a few. What I particularly loved about the program...

I have joined the web3 a couple of years ago. I joined the bootcamp because I wanted to extend my Solidity knowledge and I couldn’t find a suitable advanced content elsewhere. My learning experience was great and I think that the materials exceeded my expectations. Because I learnt a lot about solidity which I didn’t know it exists. I prefer the content like this, like in notion, not just some videos to watch over and...

Having reached the end of the lectures for the RareSkills ZK bootcamp, I wanted to wax lyrical about the quality of the course. In a world of interesting courses, choose one that is challenging, in-depth, cutting-edge, with amazing support. Thanks to Jeffrey Scholz, Gayantha De Zoysa and all those at RareSkills for putting together such a great series of lectures and supporting materials. It was great meeting you IRL as well!

I joined solidity bootcamp because I wanted to learn solidity and smart contract development for evm chains. I would lie if I didn't say the course was challenging. There's a ton of stuff to go through and coding assigment to complete for each module. Don't be afraid to get stuck though - the community and 1:1s help a lot in the learning journey. I'd say the bootcamp provides you with a foundation to build upon,...

Im Andrew and im a smart contract engineer. I joined the Advance Solidity Bootcamp because I wanted to fill in the gaps in my knowledge and get more confident with solidity. I heard great things about Rareskills from my coworkers at Kwenta, so I knew it would be a great fit My overall learning experience exceeded my expectations. I cant imagine making smart contracts without having gone through Rareskills. I see solidity completely differently now....

Hey, I’m Sam. I just finished the RareSkills ZK Bootcamp, and it's not only about a Groth16 proof system from start to finish, but it really taught me the skills and a bit of experience to implement a crypto research paper in Python. For me, that was the most exciting part, and the real nugget that I came away with. The cohorts as well, such a high caliber, the people, their experience, and just the...

I had an excellent experience taking RareSkills’ Advanced Solidity Bootcamp. The coursework was challenging and engaging and caused me to deepen my understanding of Solidity and the EVM. The assignments encourage us to research and perform hands-on testing and verification so that we’re learning by practice and not just theoretics. I enjoyed the format that the course takes as well. We have a weekly video session to learn and be able to ask any questions...

Hi, my name is Eduardo. I'm a Smart Contract Engineer at Lumx. I joined the ZK bootcamp, because I wanted to understand what ZK is and develop a ZK proof from scratch, so that I would be able to come up with new solutions and products to the company The ZK bootcamp was really good! Jeffrey has deep knowledge about the field, the classes were very interactive. The content was deep, but without getting to...

I spent 6 months trying to learn ZK on my own and got nowhere. I then found Rareskills ZK book and really loved the way concepts were explained. I realized I could learn a lot better from the bootcamp. I had a great time learning ZK from Jeffrey. So great that I enrolled in the Circom bootcamp right after I finished my ZK bootcamp. He's very knowledgeable and a really good teacher. He makes all...

I joined the Advanced Solidity bootcamp because I felt that most other bootcamps are too simple and I wanted something extremely comprehensive and challenging enough to help me evolve mentally and technically. For someone who came from a non computer science or math background, the first couple of weeks were immensely challenging - just keeping up with the class demanded my complete devotion to studying the material, practising, and writing code for the assignments. Rareskills...

The Rareskills book on ZK proofs was the most accessible complete introduction that I could find on the topic. I started with self study but wanted to try the course to engage more deeply with the subject matter and hold myself accountable. My overall experience was very positive. I don't have a deep cryptography background but was able to follow all the lessons with just linear algebra and a little bit of group theory. Enough...

My name is Sai Kranthi and I'm a web3 engineer with over 4 years of experience. I was very much interested in Zero Knowledge as privacy to public blockchains can unlock alot of use-cases. I came across Zero-Knowledge bootcamp on RareSkills when I was casually searching for resources to learn ZK on google. I must admit I ended up learning so much about Zero-Knowledge proofs in a hands on way with exercises. Jeffrey is an...

Hi I joined ZK bootcamp and was really insightful to clear out various key concepts associated with zero knowledge at a fundamental level and i would highly recommend this course for any one who wants to foray in to the domain of zero knowledge. Overall learning was pin pointed. In classroom learning was to focused and jeff would come back to core points if we did mistakes. On Community note its simply vibrant It helped...

Rareskills is the best investment I’ve made so far. I was surrounded by people who love to learn. I was directly mentored, skill-wise and career-wise, by instructors from big tech companies. And, I was able to nearly 10X what I was making just two years ago thanks to the bootcamp’s job interview prep, and their network and reputation. The bootcamp itself was a grueling cycle of studying tough concepts and complicated systems, and then implementing...

This course delivers on its promises! I landed a great job as a Solidity Engineer before even finishing my final assignment. I felt confident during each of my interviews and had a portfolio of unique and impressive projects to showcase. The amount of learning packed into 4 months is incredible and I now have far more knowledge and experience than the "4 months" of Solidity implies. The curriculum is a good balance of theory and...

For those of you who are looking to land a job as a Solidity developer, but are struggling to find the correct path to follow. I wanted to take a moment to highlight a program I undertook that not only enabled me to acquire an expert level of understanding about Solidity and the EVM, but also provided me with connections that allowed me to land a job at a prominent DeFi startup, all within 6...

I joined a web3 company about a year ago and had to write some Solidity contracts as part of the job. I quickly realised how important it is to really understand how the EVM and Solidity works if you wanted to deploy real production grade contracts for users. I wanted a structured learning program which went really deep into the weeds and found Rareskills! The course really exceeded my expectations. Each module pointed you to...

I joined Rareskills because I wanted to take my web3 knowledge to the next level. I stumbled upon some of Jeffrey’s content in the Udemy courses and Medium articles and couldn’t hold myself back. My overall experience in Rareskills has been unparalleled by anything I’ve experienced before. Personally I thrive in small group instructions and discussion and of course, that’s followed up by the one-on one code reviews. I’ve never found a problem that I...

The thought of studying Solidity engineering for 5 months was daunting, but the time spent was very focused and brought up a lot of information I would have missed had I done the journey on my own. Having completed the program, I know my hard work is rewarded when I go through pretty much any contract or protocol with ease, having all the foundational knowledge that the program has equipped me with.

The zero-knowledge course offered by Rareskills is one of the most comprehensive learning resources I have ever experienced when it comes to understanding zero-knowledge proofs. The instructors put great effort into ensuring you understand the fundamentals required to work with ZK without having to spend countless hours on the underlying mathematics. Rareskills focuses on the need-to-know to get your off the ground running. In addition to the actual instruction, the Rareskills community alone is worth...

This is a great example of what a BootCamp should be. A well-thought-out, up-to-date and relevant curriculum that covers every aspect of web3 development (testing, security, development, best practices). Fascinating discussions. Blockchain concepts that felt like black magic are crystal clear now thanks to Jeff’s mentoring. I’m a software engineer with over 6 years of experience, and in my opinion, the course is certainly not entry-level. Assignments were increasingly challenging, although nothing that couldn’t be...

Bootcamp puts you in a place where you have to write a lot of code. So there's no way for you not to get good even midway through. On the other hand, the theoretical support is really good - instead of trying to bite more than they could chew, they just provide relevant resources. The most valuable part is weekly coaching calls which helps you a lot to go through any roadblocks. So this is...

Excited to share that I've completed RareSkills Advanced Solidity Bootcamp! 🎓 Over the past 6 months. I've embarked on an incredible journey diving deep into the world of advanced blockchain development. From mastering low-level Huff and Yul complex contract implementations to exploring the intricacies of elliptic curves. Even after just 2 months it affected how I am writing production contracts. RareSkills was just what I needed – focused learning tailored to my tight schedule. While...