Hire the Best Data Structures Specialists

I’m a software engineer with a strong focus on problem solving and algorithms. I’ve solved 7000+ algorithmic problems across platforms like LeetCode and Codeforces, ranking in the top 0.16% on LeetCode and achieving Candidate Master on Codeforces. My background is deeply rooted in data structures, algorithmic thinking, and writing efficient, scalable solutions under constraints. Beyond solving problems myself, I mentor students and engineers to master problem-solving skills for coding interviews and technical assessments. I focus on building strong fundamentals and recognizing patterns.

🧩 Overview / Description I'm a software engineer with 3 years of professional experience in .NET (C#), Python, and SQL, building scalable and efficient backend solutions. Beyond development, I bring the mindset of a competitive programmer — writing optimized, maintainable, and clean code to solve complex real-world problems. Over the past few years, I’ve contributed to backend systems, fraud detection modules, and web applications across different stacks, combining analytical thinking with practical software design. ⚙️ Technical Expertise Languages: C#, Python, C++, SQL Backend: .NET, ASP.NET Core, REST APIs Frontend: React, JavaScript, HTML, CSS Database: SQL Server, MySQL Tools & Concepts: Git, OOP, Software Architecture, Debugging, UML Other: WPF, Shell scripting 🚀 What I Offer Backend development with clean architecture and maintainable code REST API design and integration Bug fixing, debugging, and performance optimization Algorithmic and logic-driven code implementation Collaboration on real-world web or desktop projects 🧠 Highlights Specialist on Codeforces & active LeetCode problem solver ACPC Finalist and TCPC Silver & Bronze Medalist Former Algorithm & Complexity Instructor at university level Experience mentoring developers to improve code quality and efficiency 💬 Let’s Work Together If you’re looking for a developer who writes code with both structure and insight, and can tackle tough problems with precision, I’d love to collaborate. Let’s turn your ideas into efficient, production-ready software.

⭐ 𝙎𝙐𝙋𝙀𝙍 𝙏𝙐𝙏𝙊𝙍 𝙊𝙉 𝙋𝙍𝙀𝙋𝙇𝙔 𝙊𝙁 𝘾𝙊𝙈𝙋𝙐𝙏𝙀𝙍 𝙎𝘾𝙄𝙀𝙉𝘾𝙀 | 3000+ 𝙇𝙚𝙨𝙨𝙤𝙣𝙨 | 𝑷𝒚𝒕𝒉𝒐𝒏 𝑻𝒖𝒕𝒐𝒓 | 𝑱𝒂𝒗𝒂 𝑻𝒖𝒕𝒐𝒓 | 𝑪++ 𝑻𝒖𝒕𝒐𝒓 | 𝑪 𝑻𝒖𝒕𝒐𝒓 | 𝙋𝙧𝙤𝙫𝙚𝙣 𝙍𝙚𝙨𝙪𝙡𝙩𝙨 | 3+ 𝙔𝙚𝙖𝙧𝙨 𝙤𝙛 𝙀𝙭𝙥𝙚𝙧𝙞𝙚𝙣𝙘𝙚 | 𝙎𝙩𝙪𝙙𝙚𝙣𝙩𝙨 𝙞𝙣 20+ 𝘾𝙤𝙪𝙣𝙩𝙧𝙞𝙚𝙨. Hi! I’m M. Zain 👋, a Software Engineer from FAST University with 3+ years of teaching experience in programming and computer science. So far, I’ve taught 90+ 𝙨𝙩𝙪𝙙𝙚𝙣𝙩𝙨 𝙖𝙘𝙧𝙤𝙨𝙨 20+ 𝙘𝙤𝙪𝙣𝙩𝙧𝙞𝙚𝙨 🌍. 𝑰’𝒗𝒆 𝒕𝒓𝒂𝒊𝒏𝒆𝒅 50+ 𝒔𝒕𝒖𝒅𝒆𝒏𝒕𝒔 𝒊𝒏 𝒎𝒖𝒍𝒕𝒊𝒑𝒍𝒆 𝒑𝒓𝒐𝒈𝒓𝒂𝒎𝒎𝒊𝒏𝒈 𝒍𝒂𝒏𝒈𝒖𝒂𝒈𝒆𝒔 (𝑪, 𝑪++, 𝑱𝒂𝒗𝒂, 𝑷𝒚𝒕𝒉𝒐𝒏, 𝑱𝒂𝒗𝒂𝑺𝒄𝒓𝒊𝒑𝒕), 𝒉𝒆𝒍𝒑𝒊𝒏𝒈 𝒕𝒉𝒆𝒎 𝒂𝒄𝒉𝒊𝒆𝒗𝒆 𝒔𝒕𝒓𝒐𝒏𝒈 𝒂𝒄𝒂𝒅𝒆𝒎𝒊𝒄 𝒂𝒏𝒅 𝒄𝒂𝒓𝒆𝒆r. 🌟 What My Students Say (based on Reviews on Preply) ⭐️⭐️⭐️⭐️⭐️ “Zain’s explanations in Python & C++ are clear and easy to follow. His teaching style is very informative and easy to understand. He first explains the main concepts and then goes through examples with you". ⭐️⭐️⭐️⭐️⭐️ “The teacher is amazing! He is always prepared for the classes and explains Java concepts very well, asks if I am understanding, does not proceed when there are doubt... ⭐️⭐️⭐️⭐️⭐️ "Zain Makes programming simple and teaches very well. He simplifies the material and explains it clearly." ✨ Proven Results with Students ✦ Helped a university student improve from a C grade (58%) to an A grade (89%) in one semester. ✦ Consistently improved learners’ scores by 40–60% on average through structured, interactive lessons. ✦ Guided 15+ students to build and deploy their first full-stack applications, many landing internships afterward. ✦ Coached 20+ O/A Level & IGCSE students, with 90% scoring A or A* in Computer Science & Programming exams. ✨ Certifications & Achievements ✦ Certified in Python Programming, Data Structures & Algorithms, Full-Stack Web Development, and Introduction to Front-End Development (Meta, Coursera). ✦ Winner of multiple coding competitions and hackathons, with top 3 finishes in 5+ national and university-level contests. ✦ Competitive programmer with a Top 10% global ranking on coding platforms (LeetCode & HackerRank). ✨ Teaching Style Engaging, interactive, and results-driven: ✦ Animated Canva slides for visual clarity ✦ Real-world coding projects ✦ Weekly progress tracking & feedback ✦ One-on-one mentorship for problem-solving & interview prep ✨ My secret sauce? Animated Canva slides to help you see the logic, not just read it plus real-world examples and hands-on coding challenges after every session. 👨‍🏫 What I Teach ✦ Programming Languages: Python, Java, C++, C, JavaScript ✦ Core Concepts: OOP, Data Structures & Algorithms, DBMS, Operating Systems, and many more ✦ Databases: MySQL, PostgreSQL, NoSQL ✦ Tools: Git/GitHub, Google Colab, Jupyter Notebook, VS Code, Cursor ✦ MS Office: Word, Excel, PowerPoint ✦ Web Development ✦ Exam Prep: IB, AP, GCSE, IGCSE, and O/A Levels, University Exams / Assignments & Projects 👨‍🏫 Teaching Experience With over 3+ years of teaching programming and computer science, I’ve learned how to turn tricky concepts into “oh, that makes sense!” moments 💡. My approach blends animated Canva slideshows, clear visual aids, and real-life coding examples to make lessons both interactive and memorable. Whether you’re just starting out or tackling advanced topics, I focus on understanding not rote memorization so the concepts truly stick. 🎓 Certifications & Background ✦ O-Level Computer Science = A* ✦ A-Level Computer Science = A ✦ Advanced Programming Coursework (Software Engineering degree, FAST University) 💼 Industry Experience I’m a Full-Stack Software Engineer experienced in building and deploying scalable web applications. ✦ Proficient in React, Node.js, Express, MongoDB, and SQL ✦ Strong foundations in C, C++, Java, Python ✦ Skilled in API development & cloud hosting ✦ Passionate about writing clean code and delivering real-world solutions ✔ Clear Explanations: I break down complex topics like OOP, DSA, and Computer Networks into simple, easy to grasp ideas. ✔️ Engaging Lessons: With animated slides , coding challenges , and real-world examples , learning never feels boring. ✔️ Personalized Approach: Whether you’re a complete beginner or tackling advanced topics, I adjust lessons to your pace and goals. ✔️ Industry Insight: As a Software Engineer, I don’t just teach theory I show you how it’s applied in real projects. ✔ Lifetime Support: Learning with me doesn’t end after class. I’ll always be there to answer your questions and guide you. For me, it’s not about money, it’s about helping you grow. 🤝 Book Your First Lesson Your first session is the perfect chance to see how I teach and how quickly you can start understanding programming concepts. Don’t wait until “someday” to start let’s turn tricky coding problems into aha! moments together. 👉 Book your first lesson today and start learning the smart way!

I can help you with: Fixing Java bugs and errors Writing simple and clean Java programs Data structures and algorithms tasks Object-oriented programming (OOP) concepts Programming assignments and explanations I focus on delivering: Clean and understandable code Fast responses and on-time delivery Clear explanations if needed Whether you need help fixing an issue or completing a task, I will work with you to get it done efficiently.

✅ Candidate Master on Codeforces (rating : 𝟭𝟵𝟭𝟱) ✅ Guardian(Top 0.3%) on LeetCode (rating : 𝟮𝟰𝟯𝟴) ✅ 6* on CodeChef (rating : 𝟮𝟮𝟬𝟱) ✅ 𝟱+ years of experience in Competitive Programming ✅ Solved 𝟰𝟬𝟬𝟬+ programming problems ✅ Expert in Data Structure and Algorithm 👋 Welcome to my profile! If you're looking to sharpen your coding skills, boost your rankings on platforms like Codeforces, LeetCode, and CodeChef, master data structures and algorithms, or prepare for coding interviews, you're in the right place! I am Md. Farhan Yousuf, a passionate and skilled competitive programmer holding the title of Candidate Master(𝟭𝟵𝟭𝟱) on Codeforces, consistently ranking in the top 0.3%(𝟮𝟰𝟯𝟴) on LeetCode, and a 6-star(𝟮𝟮𝟬𝟱) coder on CodeChef. With extensive experience in algorithm design, data structures, and problem-solving, I am dedicated to helping others excel in competitive programming and understand the core principles of Data Structures and Algorithms. 💼 𝗠𝘆 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲: 🔹 5+ Years of DSA, Competitive Programming and Problem Solving (Since 2020) 🔹 2-time Finalist in ICPC Asia West Continent Finals 🌍 🔹 Participant in ICPC Dhaka Regional, NCPC, and multiple IUPCs 🔹 400+ Contests Across Codeforces, CodeChef, LeetCode, and AtCoder 🏁 📚 𝗪𝗵𝗮𝘁 𝗜 𝗢𝗳𝗳𝗲𝗿: 🎓 One-on-One Problem-Solving Sessions – Learn how to think and code efficiently. 🎓 LeetCode Interview Preparation – Get ready for FAANG-level interviews. 🎓 Competitive Programming Tutoring – Boost your rankings with structured training. 🎓 DSA Mastery – Learn algorithms like DP, Graphs, Trees, and more! 🎓 ICPC Training & Contest Strategy – Prepare for ICPC with tailored training and contest strategies. 🔑 𝗜 𝗵𝗮𝘃𝗲 𝗺𝗮𝘀𝘁𝗲𝗿𝗲𝗱 𝘁𝗵𝗲 𝗳𝗼𝗹𝗹𝗼𝘄𝗶𝗻𝗴 𝘁𝗼𝗽𝗶𝗰𝘀: 🟢 Arrays | Strings | Stacks | Queues | Linked Lists | Binary Search 🟢 Recursion | Backtracking | Sliding Window | Two Pointers 🟢 Graphs | BFS | DFS | Dijkstra’s & Bellman-Ford Algorithms | Topological Sort 🟢 Trees | Segment Trees | Lazy Propagation | Tries 🟢 Dynamic Programming | Knapsack | LIS | LCS | DP on Graphs & Trees 🟢 Disjoint Set Union (DSU) | Kruskal’s & Prim’s Algorithm | Floyd-Warshall 🟢 Bit Manipulation | Number Theory | String Algorithms 🟢 Sqrt Decomposition | Mo’s Algorithm | Combinatorics 🟢 And many more. ✨ 𝗪𝗵𝘆 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲? ✔ One-on-One Coaching 🤝 ✔ Personalized Learning Plan 🎯 ✔ Step-by-Step Problem Solving Approach 🧩 ✔ Proven Track Record of Success 🚀 ✔ Flexible Availability & Timely Delivery ⏳ ✔ Clean, Bug-Free Code ✅ ✔ I simplify complex topics and explain them in the easiest way 💡 ✔ Guided many students who have successfully improved their problem-solving skills 🎓 🤝 I look forward to working with you and contributing to your success in the world of DSA and competitive programming and beyond. Let's achieve great things together! Thank you for visiting my profile !

I help clients solve difficult technical problems with efficient C++ implementation, strong algorithmic thinking, and clean, maintainable code. I am a USACO Gold C++ developer focused on algorithms, data structures, performance optimization, backend logic, and data-processing tasks. My strength is working on problems where correctness, speed, memory usage, and edge cases matter. I can help with: • C++ algorithm implementation • Data structures, graph algorithms, search, sorting, and dynamic programming • Code optimization, refactoring, and performance improvement • Debugging complex logic and fixing hard-to-find bugs • Improving slow or naive solutions in C++, Python, or Java • Backend logic and data-processing related tasks • Small tools, scripts, and technical utilities • Basic web application support with HTML, CSS, JavaScript, and React • Clean documentation, test cases, and maintainable code My USACO Gold background trained me to solve complex programming problems under strict time and memory limits. I apply that same process to freelance work: understand the requirement, analyze the bottleneck, choose the right approach, implement the solution, test edge cases, and explain the result clearly. I am especially interested in small to medium-sized technical tasks where strong problem-solving matters: algorithms, C++ development, backend functionality, data processing, performance-sensitive code, and debugging.