RIZWAN ALAM Senior Research Engineer
17 Reviews

With 13 years of extensive experience in System Design, Data Structures and Algorithms, Distributed Systems, Cloud Computing, and Software Engineering, I have made significant contributions to the development of Telecom solutions for various flagship programs of the Government of India, such as 5G, 4G, BharatNet, Digital India, Lawful Interception Project, Smart Cities, and Disaster Resilient India. My work has had a direct impact on improving the quality of public life.

As a graduate in Computer Science and Engineering from NITK Surathkal, I am currently working as a Senior Research Engineer at the Centre for Development of Telematics (C-DOT), the Telecom Technology Centre of the Government of India. My primary research interests encompass the expansive domain of networked systems, where I enjoy tackling challenging research problems that intersect computer networking and real-world computer systems. My ongoing work involves enhancing the performance of 4G/5G mobile packet core components and exploring next-generation designs for mobile packet core based on Network Function Virtualization (NFV) and Software Defined Networking (SDN) principles.

I have tutored students in various areas, including Operating Systems, Computer Networking, Data Structures and Algorithms, Network Programming, Computer Organization and Architecture, RISC V, Kernel architectures, OS security, Network Security, Quality of Service in IP networks, Kernel bypass mechanisms (DPDK), Network I/O subsystem in Linux, Concurrent programming, NFV, and SDN. Additionally, I have assisted students and professionals in preparing for and successfully cracking coding and system design interviews.

In my courses, I cover both high-level and low-level system design, ensuring a comprehensive understanding of the entire spectrum of system design concepts. I have also assisted students in preparing for coding and system design interviews using resources like LeetCode and HackerRank. By sharing my expertise and real-world experience, I aim to equip my students with the knowledge and skills necessary to excel in their academic and professional endeavors. Join me on this exciting journey to explore the fascinating world of system design, computer networking, data structures, algorithms, and more! Together, we will master problem-solving techniques, crack coding challenges, and become well-versed in the latest technology trends.

Subjects

  • JAVA Beginner-Expert

  • C (Programming) Beginner-Expert

  • Design patterns Beginner-Expert

  • C++ Beginner-Expert

  • Algorithm Design Beginner-Expert

  • Algorithms and Data Structures Beginner-Expert

  • Data Structures and Algorithms Beginner-Expert

  • Data Structures and Algorithms in JAVA Beginner-Expert

  • C programming Beginner-Expert

  • Java Design Patterns Beginner-Expert

  • Distributed System Design for Interviews Beginner-Expert

  • Leetcode Solving for Job Interviews Beginner-Expert

  • Embedded C Beginner-Expert

  • Leetcode Beginner-Expert

  • Coding in C++ Beginner-Expert

  • Coding interviews Beginner-Expert

  • System Design Beginner-Expert

  • Cracking Coding interviews for software companies Beginner-Expert

  • LLD (Low Level Design) Beginner-Expert

  • Low Level System Design Beginner-Expert

Experience

  • Senior Research Engineer (Jul, 2013–May, 2021) at Centre of Development of Technology
  • Teaching Assistant (Jan, 2012–Jul, 2013) at NITK Surathkal

Education

  • B.Tech (Jul, 2009–Jul, 2013) from Nitk surathkal, Mangalore, Karnataka

Fee details

    ₹800–1,000/hour (US$9.43–11.79/hour)

Courses offered

  • SYSTEM DESIGN (HIGH LEVEL)

    • ₹40000
    • Duration: 3 Months
    • Delivery mode: Online
    • Group size: Individual
    • Instruction language: English, Hindi
    • Certificate provided: No
    INTRODUCTION TO SYSTEM DESIGN-3hrs
    What is system design?
    Importance of system design
    High-level vs. low-level system design
    Example case: Overview of designing a ride-sharing system like Uber

    DESIGN PRINCIPLES AND METHODOLOGIES- 4hrs
    Modular design
    Abstraction and encapsulation
    Separation of concerns
    Layered architecture
    Design patterns
    Example case: Applying design patterns in the Netflix streaming service

    REQUIREMENTS GATHERING AND ANALYSIS-3hrs
    Identifying stakeholders
    Eliciting requirements
    Analyzing requirements
    Creating use cases and user stories
    Example case: Requirements gathering for a project management tool like Trello

    SYSTEM MODELING TECHNIQUES-4hrs
    Unified Modeling Language (UML)
    Entity-Relationship Diagrams (ERD)
    Data Flow Diagrams (DFD)
    Statecharts
    Example case: Modeling an e-commerce system like Amazon

    ARCHITECTURAL DESIGN-4hrs
    Identifying system components and their relationships
    Designing system interfaces
    Scalability and performance considerations
    Fault tolerance and reliability
    Security and privacy
    Example case: Architectural design of a social media platform like Twitter

    DESIGNING DISTRIBUTED SYSTEMS-4hrs
    Basics of distributed systems
    CAP theorem
    Data replication and consistency models
    Microservices architecture
    Example case: Distributed system design in a messaging app like WhatsApp

    DATABASE DESIGN-4hrs
    Relational database design
    NoSQL database design
    Data warehousing and OLAP
    Indexing and query optimization
    Example case: Database design for a video-sharing platform like YouTube

    NETWORKING AND COMMUNICATION-4hrs
    Network protocols and standards
    API design (REST, GraphQL)
    Message brokers and event-driven architectures
    Load balancing and caching strategies
    Example case: Communication and networking in a collaboration platform like Slack

    USER INTERFACE AND USER EXPERIENCE DESIGN-3hrs
    Principles of UI design
    User-centered design
    Designing for accessibility
    Prototyping and usability testing
    Example case: UI/UX design for a music streaming service like Spotify

    DESIGNING FOR THE CLOUD-3hrs
    Cloud computing models (IaaS, PaaS, SaaS)
    Cloud-native design principles
    Containerization and orchestration (Docker, Kubernetes)
    Serverless architectures
    Example case: Cloud architecture for a file storage service like Dropbox

    SYSTEM DESIGN CASE STUDIES-3hrs
    Analyzing real-world system designs
    Identifying design trade-offs
    Lessons learned and best practices
    Example cases: Google Search, Airbnb, and LinkedIn

    PROJECT: END-TO-END SYSTEM DESIGN-3hrs
    Working in teams to design a complete system
    Applying the concepts learned throughout the course
    Presenting the final design and receiving feedback
    Example case: Designing a personalized news recommendation system

  • SYSTEM DESIGN (LOW LEVEL)

    • ₹40000
    • Duration: 3 Months
    • Delivery mode: Online
    • Group size: Individual
    • Instruction language: English, Hindi
    • Certificate provided: No
    INTRODUCTION TO LOW-LEVEL SYSTEM DESIGN - 3 hours
    What is low-level system design?
    Importance of low-level system design
    High-level vs. low-level system design
    Example case: Overview of designing a simple calculator application

    OBJECT-ORIENTED DESIGN PRINCIPLES - 4 hours
    Encapsulation
    Inheritance
    Polymorphism
    Abstraction
    Composition and aggregation
    Example case: Object-oriented design of a library management system

    ALGORITHMS AND DATA STRUCTURES - 8 hours
    Common data structures (arrays, linked lists, trees, graphs, hash tables, etc.)
    Basic algorithms (searching, sorting, traversal, etc.)
    Time and space complexity analysis (Big O notation)
    Algorithm design techniques (recursion, dynamic programming, greedy algorithms, etc.)
    Example case: Designing a text editor with efficient search and editing capabilities

    DESIGN PATTERNS - 6 hours
    Creational patterns (singleton, factory method, abstract factory, builder, prototype)
    Structural patterns (adapter, bridge, composite, decorator, facade, flyweight, proxy)
    Behavioral patterns (chain of responsibility, command, interpreter, iterator, mediator, memento, observer, state, strategy, template method, visitor)
    Example case: Implementing design patterns in a weather monitoring application

    SOFTWARE DESIGN BEST PRACTICES - 4 hours
    Code organization and modularization
    Naming conventions and coding standards
    Error handling and exception management
    Logging and debugging
    Code reviews and refactoring
    Example case: Analyzing and improving the design of an existing codebase

    SOFTWARE TESTING AND VALIDATION - 4 hours
    Types of testing (unit testing, integration testing, system testing, acceptance testing)
    Test-driven development (TDD)
    Writing test cases and test suites
    Automated testing tools and frameworks
    Performance testing and optimization
    Example case: Testing and validating a shopping cart application

    VERSION CONTROL AND COLLABORATION - 3 hours
    Introduction to version control systems (Git, SVN, etc.)
    Branching and merging strategies
    Code review and collaboration tools (GitHub, GitLab, Bitbucket, etc.)
    Continuous integration and continuous deployment (CI/CD)
    Example case: Collaborative development of a web application using version control

    DOCUMENTATION AND MAINTENANCE - 3 hours
    Importance of documentation
    Types of documentation (code comments, API documentation, user manuals, etc.)
    Documentation tools and formats (Javadoc, Doxygen, Sphinx, etc.)
    Best practices for maintaining and updating documentation
    Example case: Creating documentation for a RESTful API

    PROJECT: END-TO-END LOW-LEVEL SYSTEM DESIGN - 8 hours
    Working in teams to design and implement a complete software system
    Applying the concepts learned throughout the course
    Presenting the final design and implementation
    Receiving feedback and suggestions for improvement

  • DATA STRUCTURES AND ALGORITHMS(DSA)

    • ₹48000
    • Duration: 3 Months
    • Delivery mode: Online
    • Group size: Individual
    • Instruction language: English, Hindi
    • Certificate provided: No
    INTRODUCTION TO PROGRAMMING - 3 hours
    Programming languages and paradigms
    Basics of Python, Java, or C++ (choose one based on preference)
    Writing, compiling, and executing a program
    Variables, data types, operators, and expressions
    Control structures: loops, conditional statements, and functions

    FUNDAMENTAL DATA STRUCTURES - 8 hours
    Arrays and Lists
    Strings
    Stacks and Queues
    Linked Lists (Singly, Doubly, and Circular)
    Example case: Implementing a basic text editor

    ADVANCED DATA STRUCTURES - 12 hours
    Trees (Binary, AVL, and Red-Black)
    Heaps (Min-Heap, Max-Heap, and Priority Queues)
    Graphs (Directed, Undirected, Weighted, and Unweighted)
    Hash Tables
    Tries
    Example case: Designing a dictionary with autocomplete functionality

    ALGORITHMS - 12 hours
    Introduction to algorithms and time complexity
    Searching algorithms (Linear Search, Binary Search)
    Sorting algorithms (Bubble, Selection, Insertion, Merge, Quick, Heap, and Counting Sort)
    Tree traversal algorithms (Preorder, Inorder, Postorder, and Level Order)
    Graph traversal algorithms (Breadth-First Search, Depth-First Search)
    Shortest path algorithms (Dijkstra's, Bellman-Ford, A*, and Floyd-Warshall)
    Dynamic programming (Top-down, Bottom-up, and Memoization)
    Greedy algorithms
    Backtracking
    Divide and conquer
    Example case: Implementing a route planning application

    PROBLEM-SOLVING TECHNIQUES - 6 hours
    Analyzing and understanding a problem
    Identifying the most suitable data structures and algorithms
    Time and space complexity optimization
    Debugging and testing techniques
    Example case: Optimizing a file compression algorithm

    LEETCODE AND PROGRAMMING CHALLENGES - 14 hours
    Introduction to LeetCode and HackerRank
    Solving easy, medium, and hard-level problems
    Tips and tricks for efficient problem-solving
    Participating in coding contests and hackathons
    Mock interviews and preparing for technical interviews
    Example case: Solving LeetCode problems in different categories (arrays, strings, trees, graphs, dynamic programming, etc.)

    PROJECT: BUILDING A COMPLETE APPLICATION - 5 hours
    Working in teams to design and implement a complete software application
    Applying the concepts learned throughout the course
    Presenting the final design and implementation
    Receiving feedback and suggestions for improvement

  • RUST

    • ₹40000
    • Duration: 3 Months
    • Delivery mode: Online
    • Group size: Individual
    • Instruction language: English
    • Certificate provided: No
    Introduction to Rust (4-6 hours)

    Overview of Rust language features and benefits
    Setting up the development environment
    Basic syntax and data types
    Ownership and borrowing concepts
    Rust Basics (10-12 hours)

    Control flow statements (if, loops, match)
    Functions and modules
    Error handling with Result and Option
    Structs and enums
    Pattern matching
    Rust Data Structures and Collections (8-10 hours)

    Vectors, arrays, and slices
    Strings and string manipulation
    HashMaps and other collections
    Memory management in Rust
    Concurrency and Parallelism in Rust (8-10 hours)

    Understanding threads and thread synchronization
    Concurrent programming with Rust's standard library
    Parallelism with Rayon and other libraries
    Atomic operations and locks
    Advanced Rust Concepts (10-12 hours)

    Traits and generics
    Lifetimes and borrowing rules
    Advanced pattern matching
    Advanced error handling techniques
    Macros and metaprogramming
    Rust Application Development (12-15 hours)

    File I/O and serialization
    Networking and HTTP requests
    Working with JSON or other data formats
    Building command-line applications
    Testing and documentation
    Rust Web Development (12-15 hours)

    Introduction to web frameworks like Rocket or Actix
    Templating engines
    Database integration (e.g., Diesel or SQLx)
    RESTful API development
    Authentication and security considerations
    Rust Ecosystem and Tooling (4-6 hours)

    Package management with Cargo
    Third-party crates and libraries
    Continuous integration and deployment
    Debugging and profiling tools
    Optimizing Rust code

  • GO

    • ₹40000
    • Duration: 4 Months
    • Delivery mode: Online
    • Group size: Individual
    • Instruction language: English
    • Certificate provided: No
    Introduction to Go (4-6 hours)

    Overview of Go language features and benefits
    Setting up the development environment
    Basic syntax and data types
    Control flow statements (if, loops, switch)
    Functions and packages
    Go Fundamentals (10-12 hours)

    Structs and methods
    Pointers and memory management
    Arrays, slices, and maps
    Error handling with built-in errors
    Goroutines and concurrency basics
    Go Concurrency (8-10 hours)

    Goroutines and channels
    Synchronization and mutual exclusion
    Buffered channels and select statements
    Go's memory model and race conditions
    Advanced concurrency patterns
    Go Web Development (12-15 hours)

    Introduction to web development in Go
    HTTP fundamentals
    Building HTTP servers and handling requests
    Routing and middleware
    Working with templates and forms
    Go Packages and Libraries (8-10 hours)

    Package management with Go modules
    Exploring the standard library
    Working with third-party libraries
    Testing and benchmarking
    Documentation and examples
    Go Database Integration (8-10 hours)

    SQL fundamentals
    Connecting to databases
    Database queries and transactions
    ORM and database libraries in Go (e.g., GORM)
    Database migration and data modeling
    Advanced Go Topics (10-12 hours)

    Interfaces and type assertions
    Error handling patterns and best practices
    Reflection and metaprogramming
    Concurrency patterns and parallelism
    Performance optimization techniques
    Go Application Development (12-15 hours)

    CLI application development
    File I/O and serialization
    Working with JSON or other data formats
    Building RESTful APIs
    Authentication and security considerations

17 Reviews
5 out of 5

User Photo May 10, 2024
Payment verified US$ 3.54 (300 INR)

Inspiring, warm and caring Tutor

I had a great experience with Rizwan Sir, he helped me a lot in my grad course. He was very patient, humble, and knew a lot about the subject. He explained things in different ways until I really understood. He was also very kind and easy to talk to, which made learning much easier. Because of him, my grades got a lot better, and I started to enjoy the subject more. I highly recommend him to anyone who needs help. He's not just a good tutor but also a great person to learn from. I actually went from hating coding to liking it. He was so involved in the course that he was more worried about the deadlines than I was. In summary great tutor if you don't like coding and still want to transition he should be your go-to person!! (P.S Marks went from 70 to 98)

User Photo April 8, 2023
Payment verified US$ 1 (50 Coins)

Amazing tutor

Rizwan sir has helped me grasp complicated C topics. He is very friendly and puts an extra effort to make sure the teaching process is done extraordinarily

User Photo March 3, 2023
Payment verified US$ 1 (50 Coins)

Great Teacher for Data Structures and Algorithms!

As a first year in a completely new course in uni, I was having trouble understanding the new concepts and catching up with the class. However, after enrolling in Mr Rizwan's lessons, I was able to grasp complex concepts in the course easily. Mr Rizwan's teaching methods helped me gain confidence in the topics I was learning, and he helped me pick up the necessary skills and key points without difficulty.

User Photo August 31, 2022
Payment verified US$ 1 (50 Coins)

Great for Operating Systems

Good with OS concepts, Kernel Programming

User Photo August 14, 2022
Payment verified US$ 1 (50 Coins)

Awesome teacher with in-depth knowledge.Highly Recommended

I have been learning DSA from Rizwan sir and it has been a great experience.
He is a passionate tutor.He has an amazing way of breaking things down so that they are understandable,easy and thorough and always keeping it engaging.
He taught each topic using different approach and method as per level of my understanding. I would highly recommend for anyone who want to learn and understand DSA.

User Photo July 31, 2022
Payment verified US$ 1 (50 Coins)

Great Teacher and a friend! Recommended for System Design!!

Hi Everyone,
I wanted to drop a quick line about Rizwan. He is very passionate about his work and takes it seriously. You can ask him a million questions and he would be happy to answer them all. I have been studying System Design with him for the past few months and he makes the concepts much easier to understand. I would recommend him.

User Photo July 11, 2022
Payment verified US$ 1 (50 Coins)

Leetcode prep

Clear explanations and patiently teaches concepts. Can improve your coding and problem solving ability quickly. Highly recommended for tutoring.

User Photo May 7, 2022
Payment verified US$ 1 (50 Coins)

Expert Tutor for System Programming

Found him very knowledgeable and a subject matter expert in my son's college course for system programming. We covered Randal Bryant's book. My Son was able to perform very well with his help and guidance in Tutoring, assignments and exam preparations. Very dedicated and ensures timely submissions. Highly recommended.

User Photo April 19, 2022
Payment verified US$ 5

Excellent Teacher

Very knowledgeable and explains the material in a way you would understand easily. He has helped me with an Operating System project.
Would definitely recommend 100%.

User Photo March 20, 2022
Payment verified US$ 5

Best tutor ever!

I have learned c programming from him. He teaches really a detail of concepts and he makes me understand fully. I strongly recommend him if you are a computer science student.

User Photo January 20, 2022
Payment verified US$ 1 (50 Coins)

Excellent teacher and a mentor

Rizwan Sir is the best teacher I have ever interacted with. Well, best is an understatement. He not only teaches Data Structures and Operating Systems well, but he also gives 24*7 personalized attention. He replies to every doubt of mine immediately. Answers all my questions, gives homework and tests. I have never met a teacher who is so interactive and helpful not only during the duration of the class but also otherwise. He motivates you to be a better student and a hardworking individual.
He is very intelligent, dedicated, understanding, humble, and passionate all the qualities a teacher should have.
If you really want to learn a subject well and not be spoon-fed, you should go take classes with him immediately.

User Photo January 4, 2022
Payment verified US$ 1 (50 Coins)

Amazing teacher with indepth knowledge

I have used rizwan for DSA and OS subjects and he has good knowledge of the subjects, with his help I was able to understand the concepts of DSA and OS with clarity.

User Photo January 4, 2022
Payment verified US$ 3.56 (300 INR)

Awesome teacher cum Mentor

Rizwan Sir is a genius/master of Operating System and Data Structures and Algorithms. He is brilliant and expert in Coding. He is very polite, nice, humble, dedicated, committed and a transparent teacher. He has answer of every toughest question. Don’t ask him easy question. Almighty has sent him for the tough ones. He guided my son very well and my son scored very good grades. Very intelligent and works well under pressure. If he gives you his word, he will do. I highly recommend him. He is not money minded in today's world. I would like to use his services again for my younger child also. The best teacher ever. Great at explaining everything, vastly knowledgeable person, experienced, friendly in nature and obviously a great person. May Almighty bless Rizwan ji and his family always.

User Photo August 21, 2021
Payment verified US$ 5

Highly recommended

Rizwan is an excellent tutor who is very knowledgeable and conveys her knowledge of complex material in a manner easily understandable.  Rizwan taught me operating systems concepts. He is very intelligent, thoughtful and attentive to my needs. He also understands that different people learn best through different methods of teaching. Therefore, he lets me figure out the answers and guides me with very thorough explanations. What is most admirable about Rizwan is that he is always hungry to learn and to expand his skill set. As a teacher, he approaches every lesson as an opportunity to learn as much as his student. Therefore, all of our lessons have been engaging and fun. Rizwan makes every convoluted concept understandable and has the patience and dedication to explain difficult concepts until they become coherent. Highly recommended.

User Photo August 13, 2021
Payment verified US$ 4.90 (250 Coins)

Excellent teacher

He is a really passionate teacher and a student who wants to learn as well as disperse knowledge. He has deep knowledge of all CS concepts and always working to gain deeper knowledge .
He prepares his study content before hand, and handles all queries.
I will strongly recommend anyone to study under him.

User Photo July 12, 2021
Payment verified US$ 4.90 (250 Coins)

❤️❤️

I have been learning computer architecture from rizwaan sir these day and it has been a great experience. He is a very thoughtful teacher who puts a lot of thought into how he presents the material. His lessons were engaging, useful, and he was very patient with me and always encouraging me to try. I would highly recommend him to anyone interested in learning .

User Photo June 8, 2021

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First class is free?