Bibak Roy

Senior Software Engineer

Sylhet, Bangladesh

Experienced Software Developer with 4.5 years of expertise specializing in React & TypeScript. Proficient in large-scale migrations, performance optimization, and scalable frontend development.

Get In TouchView My Work

About Me

Experienced Software Developer with 4.5 years of expertise specializing in React & TypeScript. Proficient in large-scale migrations, performance optimization, and scalable frontend development with decent backend exposure. High emphasis on boosting system efficiency with a proven record of 65%, leading to a 10x increase in customer satisfaction and millions in monthly revenue. Driven to architect high-performance front-ends, achieving a 5x growth in user engagement and a 28% spike in customer acquisitions.

4.5+

Years of Experience

65%

Performance Improvement

10x

Customer Satisfaction

5x

User Engagement Growth

Technical Skills

Languages

TypeScriptJavaScriptPythonC++

Frontend

React.jsNext.jsReact NativeReduxHTML5CSS3Tailwind CSSSASS/SCSSMaterial UIBootstrap

Backend

Node.jsExpress.js

Databases

MySQLPostgreSQLMongoDBFirebase

Tools & Others

ExpoOpenAI APIsDockerGraphQLWebSocketJestCypressCI/CDWebpackBabelGitJiraPrisma

Professional Experience

Software Engineer III

Data Tree Technology, USA (Remote)June 2025 - Present
  • Building a scalable solution for Kinetik's digitally integrated healthcare system, enabling seamless workflows across NEMT (Non-Emergency Medical Transportation).
  • Contributing to the Trip Scheduler product through patient and transportation provider management, trip scheduling, driver dispatch, claims tracking, & transparency dashboards for health plans & transportation providers.
  • Enhancing performance and reducing UI latency by 40% through optimized rendering, memoization, code splitting, and lazy loading.
  • Developing a labeling system for Patients, Trips, Transportation Providers, Notes, & Documents with advanced filtering/search.
  • Contributing to CI/CD workflows, participating in code reviews, & ensuring smooth deployment of new features with zero downtime.

Senior Developer

Supertal PTE LTD, Singapore (Remote)June 2023 - May 2025
  • Led the migration of a modular construction management system, Offsight, from Angular.js to React.js, raw CSS to TailwindCSS, and JavaScript to TypeScript, resulting in a 30% improvement in development efficiency and a scalable codebase.
  • Reduced loading time by 65% through optimization, react hooks, and reduced API calls, achieving a 10x boost in user satisfaction.
  • Developed production/labor/order tracking, analytics, a PDF editor like Docusign, workflow automation, report generation, forecasting & a feature-permission-management system, serving 43 global companies & generating millions of dollars as revenue.
  • Implemented real-time data using Socket.IO, state management with Redux Toolkit, and drag-and-drop with React Beautiful DnD.
  • Introduced agile methodologies, CI/CD pipelines, & unit/end-to-end (e2e) testing to ensure seamless development & deployment.

Frontend Developer

HockeyStack, USA (Remote, Part-Time)December 2023 - May 2024
  • Supported a YCombinator-funded company by building a visually stunning, pixel-perfect, and high-performance landing page for their Go-to-Market analytics platform, leading to a 28% growth in new user sign-ups.
  • Collaborated with the UI/UX team to ensure seamless design integration with improved navigation features, enhancing overall user experience and accessibility, generating 5x more customer engagement, and reducing bounce rate.

Software Engineer

Recruit LLC, Sylhet, BangladeshJanuary 2022 - May 2023
  • Engineered Retune, a tool for building fine-tuned large language models (LLM) with GPT-4 using OpenAI APIs, allowing users to train personalized AI assistants & generate APIs to integrate into their apps as chatbots/ agents, serving over 4000 active customers.
  • Integrated Completions & Fine-tuning APIs, designed REST APIs (Next.js backend) & managed MySQL with Prisma.
  • Crafted chat functionality for individuals/groups (Playroom's mobile app), allowing parents of nurseries/preschools to join by invitation, implemented features like photo sharing, calendar event creation, and a map to locate the playgrounds/parks.
  • Led the entire development lifecycle from initial concept through the final deployment of 6 React Native apps using Expo, transforming complex forestry data into intuitive user interface designs, alleviating pain points of 6000+ field workers.

Junior Full Stack Developer

Nayocode, UK (Remote)March 2021 - December 2021
  • Spearheaded the front end design of beatbarrow utilizing Flexbox, Grid, and responsive design with SASS, ensuring cross-browser compatibility and building a music and picture upload system, currently engaging over 500 local users.
  • Implemented Next.js SSR & SSG methods for a smooth user experience (UX) and introduced an authentication system with JWT.
  • Facilitated backend (Node.js) with GraphQL and MongoDB and integrated Stripe payment (one-time & subscription).

Featured Projects

Kinetik Healthcare System

Scalable solution for digitally integrated healthcare system, enabling seamless workflows across NEMT (Non-Emergency Medical Transportation) with trip scheduling, driver dispatch, and transparency dashboards.

ReactTypeScriptNext.js
40% UI latency reduction

Offsight Construction Management

Led migration from Angular.js to React.js, resulting in 30% improvement in development efficiency. Features include production/labor tracking, analytics, PDF editor, workflow automation, and forecasting.

ReactTypeScriptTailwindCSSRedux
65% loading time reduction43 global companies served

Retune - LLM Fine-Tuning Platform

Tool for building fine-tuned large language models with GPT-4 using OpenAI APIs, allowing users to train personalized AI assistants and generate APIs for chatbots/agents.

Next.jsOpenAI APIsMySQLPrisma
4000+ active customers

HockeyStack Landing Page

Visually stunning, pixel-perfect, and high-performance landing page for YCombinator-funded Go-to-Market analytics platform.

ReactNext.jsPerformance Optimization
28% growth in sign-ups5x customer engagement

Playroom Mobile App

Chat functionality for individuals/groups, allowing parents of nurseries/preschools to join by invitation. Features include photo sharing, calendar events, and map integration for playgrounds/parks.

React NativeExpoFirebase

Beatbarrow Music Platform

Music and picture upload system with responsive design, Next.js SSR/SSG, JWT authentication, GraphQL backend, and Stripe payment integration.

Next.jsGraphQLMongoDBStripe
500+ local users

Get In Touch

I'm always open to discussing new opportunities, interesting projects, or just having a chat about technology.

Email

roybibak1@gmail.com

Location

Sylhet, Bangladesh