Juboraj Islam Mamun
Hey!I'm Juboraj Islam Mamun

I Build Full-Stack Stuff That Actually Works!

Code, bugs, and late-night coffee keep it all running.
I turn complex problems into clean, working solutions.

Contact me →
Juboraj Islam Mamun

A Bit About Me

I'm a full-stack developer and engineering leader, currently serving as the CTO of a fast-paced startup. I build and scale production-grade applications — from frontend interfaces to backend infrastructure — with a deep focus on performance, reliability, and user experience.

My journey began with a curiosity about how the web works. Today, it’s a mission: to create meaningful software that solves real problems. Over the years, I’ve built SaaS products, delivered high-impact client projects, and created 20+ tools for content creators, all while leading engineering teams and mentoring junior developers.

I specialize in both frontend and backend development using technologies like React, Remix, Next.js, Node.js, and TypeScript. On the backend, I focus heavily on system design, DevOps, and cloud-native development, working with tools like Docker, CI/CD pipelines, Kubernetes, and AWS.

As a CTO, I’ve been responsible for technical decision-making, team management, and architecting scalable systems. I believe in fostering a culture of continuous learning, clean code, and open communication. I’m also passionate about mentoring, contributing to open source, and staying on the edge of evolving technologies. When I’m not coding or debugging over coffee, I’m diving into topics like distributed systems, developer productivity, and leadership in tech.

🟦 Technical Proficiency

Years of dedicated practice and real-world projects have sharpened my technical skills. Each percentage represents my confidence and experience level with these technologies.

Languages

C70%
C++80%
JavaScript85%
TypeScript90%

Frontend

React90%
Next85%
Remix85%
Redux90%
Tailwind CSS95%
Bootstrap80%

Backend

Node85%
Express95%
Redis80%

Database

MongoDB90%
PostgreSQL80%
MySQL70%

🧰 Tools & Technologies

My toolkit is constantly expanding as I explore new technologies that enhance user experiences and streamline development workflows.

C
C++
JavaScript
TypeScript
React Js
Next Js
Remix Js
Redux
Firebase
Metarial UI
Shadcn
Tailwind CSS
Bootstrap
Node Js
Express Js
Redis
Rest API
GraphQL
Jwt
Microservices
MongoDB
PostgreSQL
MySQL
Mongoose
Prisma
Stripe
PayPal
Paddle
SSL Commerz
Docker
Kubernetes
AWS
VPS
GitHub Actions

📌 Methodologies & Approaches

Beyond code, my work is guided by proven methodologies and best practices that ensure scalable, maintainable, and user-centered solutions. These approaches form the foundation of every project I undertake.

Responsive DesignMobile-First ApproachComponent-Based ArchitectureRESTful APIsCI/CDTDDAgileUX ResearchPerformance Optimization

📌Project Management

Leading projects from conception to completion requires more than technical knowledge—it demands organization, communication, and strategic thinking. Here's how I manage the complexity of development projects.

Planning

  • Requirements gathering
  • Timeline estimation
  • Resource allocation
  • Execution

  • Sprint planning
  • Code reviews
  • Continuous integration
  • Delivery

  • Deployment automation
  • Performance monitoring
  • User feedback cycles
  • Were I've Work & Education

    1

    Software Engineer

    Apr 2023 - Apr 2025

    I have built two large-scale projects, one SaaS product, and over 20 free tools for content creators

    OctopusX

    Chittagong, Bangladesh

    2

    Team Lead & Acting CTO

    Feb 2024 - Apr 2025

    Led technical strategy and engineering team for product development

    OctopusX

    Chittagong, Bangladesh

    3

    Full Stack Developer

    Jan 2023 - Apr 2023

    Built full-stack applications for various client projects

    Monster Studio

    Chittagong, Bangladesh

    4

    Bachelor Of Business Studies

    Jan 2021 - Jan 2025

    Completed degree with focus on business and technology integration

    Notional University

    Gazipur, Bangladesh

    My Professional Projects

    Blood Donor & Doctor Service App

    A healthcare app for booking appointments, requesting blood donations, and consulting with doctors via Google Meet.

    TECH STACK

    TypeScriptExpress.jsNext.jsReduxPrismaPostgreSQLJWTStripeTailwindMaterial UI

    KEY FEATURES

    • •Smart booking system for appointments and donor requests with real-time notifications.
    • •Users can request blood donors, review donations, and donors get notified upon review completion.
    • •Online doctor consultations through Google Meet with prescription and review functionalities.

    Smart E-Shop

    A full-featured e-commerce platform with advanced search, filtering, payment gateway, and admin management.

    TECH STACK

    JavaScriptExpress.jsReact.jsReduxPrismaMongooseJWTStripeTailwindDaisy UI

    KEY FEATURES

    • •Users can search, filter products, add to cart, and make payments seamlessly.
    • •Dashboard for users to track orders and submit reviews after purchase.
    • •Admin panel for managing products, users, and transactions smartly.

    National Public College

    A college management system where students can enroll in courses and teachers can manage routines and results.

    TECH STACK

    TypeScriptExpress.jsReact.jsReduxPrismaMongooseJWTStripeTailwindDaisy UI

    KEY FEATURES

    • •Students can enroll in courses with an intuitive dashboard experience.
    • •Teachers can manage results, class routines, and exam schedules.
    • •Smart and user-friendly dashboard for students and teachers.

    123 Machine Game

    A color-based coin selection game where users can double their balance by winning color matches.

    TECH STACK

    JavaScriptExpress.jsReact.jsReduxPrismaMongooseJWTStripeTailwindDaisy UI

    KEY FEATURES

    • •Interactive gaming app where users bet on colors to win rewards.
    • •Simple UI with number and email-based authentication system.
    • •Admin panel to manage user selections and track gameplay statistics.

    Electric tools Store

    A manufacturer management app with product handling, orders, and dashboard for seamless operations.

    TECH STACK

    JavaScriptExpress.jsReact.jsReduxPrismaMongooseJWTStripeTailwindDaisy UI

    KEY FEATURES

    • •Coin selection gaming functionality for user engagement.
    • •User-friendly UI with robust authentication (email & number based).
    • •Admin dashboard for managing users, gameplay, and app statistics.

    Luxury Living Hotels

    A creative agency management platform with gaming features, admin dashboards, and authentication modules.

    TECH STACK

    JavaScriptExpress.jsReact.jsReduxPrismaMongooseJWTStripeTailwindDaisy UI

    KEY FEATURES

    • •Coin selection game with balance rewards for users.
    • •Authentication system with number and email login.
    • •Admin panel to manage user selections and app content.

    Let’s Clear Things Up

    Profile

    Got a question? Let’s chat.

    I’m just a message away. Whether it’s a bug, a collab, or just to say hi.

    I’m a full-stack developer who writes code that doesn’t just run; it solves problems. From Vue and React on the front to Rails and Python on the back, I’ve worked across the stack to ship solid, user-friendly stuff.

    Satisfied Clients

    Happy Clients

    Project Completed

    Cup of Coffee

    Award

    What They Said About Me

    “

    Juboraj Islam Mamun is a full-stack expert who turns ideas into reality using TypeScript, React, Express, and MongoDB. He doesn’t just write code; he builds systems that are fast, reliable, and built to last. What makes him stand out is his ability to see the whole picture. He creates easy-to-use frontends with React and builds strong backends with Express and MongoDB. His TypeScript skills make his code precise and dependable, ensuring everything works smoothly together. Beyond his technical talent, Juboraj Islam Mamun has a natural ability to break down complex problems into simple, actionable steps. He’s quick to adapt, eager to learn, and always willing to help others on the team. Working with him has been an inspiring experience.

    Shariar Islam

    Shariar Islam

    Software Engineer

    “

    I've had the opportunity to work closely with Juboraj Islam Mamun at OctopusX, and I can confidently say he is an outstanding backend developer. His expertise in the MERN stack consistently shines through in every project he touches — from building efficient REST APIs to designing scalable architectures. Juboraj Islam Mamun combines strong technical skills with a proactive mindset, always delivering high-quality work and finding smart solutions to complex problems. His collaborative attitude and dedication make him a huge asset to any team. I highly recommend Juboraj Islam Mamun for any future opportunities!

    Shahadath Hossen Sajib

    Shahadath Hossen Sajib

    Backend Developer

    “

    I had the privilege of working closely with Juboraj Islam Mamun both during my internship and later as a full-time team member. From the very beginning, he served as a mentor to me, guiding me patiently and helping me grow both technically and professionally. Mamun is a highly skilled backend engineer with strong expertise in the MERN stack. He has a deep understanding of building RESTful APIs with Express.js and designing scalable database architectures. As the CTO of our team, he not only led critical projects but also managed the team with exceptional leadership, ensuring smooth collaboration and high-quality results. Beyond his technical skills, Mamun is a fantastic teammate — always friendly, supportive, and approachable. Working with him was an inspiring experience, and I’m truly grateful for his mentorship and collaboration. I highly recommend Mamun to any organization looking for a talented backend engineer and a great leader.

    Robiul Hossain

    Robiul Hossain

    Software Engineer

    “

    I had the honor of working with Juboraj Islam Mamun, our CTO, and I can confidently say that he is an exceptional technical leader and backend developer. His sharp mind and profound technical skills are truly inspiring. Juboraj Islam Mamun's ability to maintain a highly efficient and manageable workflow has been a cornerstone of our team’s success. As a CTO, he is not only technically proficient but also highly active and engaged in his area of expertise, providing invaluable guidance to the team. His support and mentorship have greatly contributed to my growth in backend development. Juboraj Islam Mamun is truly the finest CTO I have had the pleasure to work with, and his impact on our team has been profound.

    Amdadul Haque Bhuiyan

    Amdadul Haque Bhuiyan

    Frontend Developer

    Things I’ve Written

    Juborajislam46@Gmail.Com

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