Hi, I’m Rajon Dey
Module Lead (Frontend) | Senior Software Engineer
With 6+ years of experience owning frontend architecture and building production-grade applications. I specialize in React, Next.js, TypeScript, and full-stack solutions that drive real business impact.
Introduction
At a Glance.
As a Module Lead (Frontend) and Senior Software Engineer with 6+ years of experience, I build and maintain production-grade web applications for global clients using React, Next.js, and TypeScript. I own frontend architecture, mentor developers, and contribute to backend APIs and integrations with Node.js and Python (FastAPI), working in agile, cross-functional teams on enterprise and regulated platforms.
My work includes performance optimization (~30% load-time reduction on production systems), CI/CD with GitHub Actions, technical discovery and estimation, and mentoring through code reviews and sprint execution. I'm experienced in API design, authentication, and feature integration across frontend and full-stack delivery.
Beyond client work, I build products like Online IELTS Exam Platform, also contribute to AI security research. I'm passionate about solutions that balance technical excellence with real business impact. Seeking remote-first or relocation-ready roles where strong frontend ownership and growing full-stack capability are valued.
Ready to discuss how I can contribute to your team's success!
Download My CV
Full-Stack Development
Team Leadership
Performance Optimization
SaaS & Web Applications
My Tech Stack
Delivering impactful solutions with advanced technologies. My carefully selected tech stack ensures robust, scalable, and user-friendly applications.
What I Have Done So Far
Work Experience.
Module Lead (Frontend)
SJ Innovation LLC
- Designed and delivered scalable web applications, owning frontend architecture while collaborating on end-to-end system design.
- Built and maintained production systems using React, Next.js, TypeScript, and modern frontend tooling.
- Worked with backend teams on API design, data contracts, authentication, and feature integration.
- Contributed to backend services and integrations using Node.js and Python where required.
- Worked on CI/CD pipelines using GitHub Actions to automate build, test, and deployment workflows.
- Led technical discovery, estimation, and architectural discussions across frontend and full-stack features.
- Mentored engineers through code reviews and sprint execution; participated in technical interviews.
- Improved application performance and reliability, achieving ~30% load-time reduction on production systems.
Software Developer (Freelance / Contract)
Freelance
- Built and delivered client-facing web applications for international clients.
- Worked across frontend development, backend integrations, and production deployments.
Featured Projects
A selection of my most impactful projects, demonstrating technical expertise, leadership, and real-world business value.
A full-stack platform for Online IELTS test practice with real-time scoring, analytics, and comprehensive test management serving 1000+ test takers.
A full-stack planning and reflection platform for building yearly goals, tracking progress, and reviewing personal milestones.
Led the migration of Neutrogena's website to Contentful headless CMS as part of Kenvue's global DXP initiative, managing a cross-functional team and ensuring brand compliance.
Publications & Recognition
Selected publications, certifications, and awards
ICCIT 2025 Paper Participation Certificate
ICCIT 2025 (IEEE Bangladesh Section)
Certificate of participation for the paper “Code Poisoning Through Misleading Comments: Jailbreaking Large Language Models via Contextual Deception.”
5th Year Completion Certificate
SJ Innovation LLC
Celebrating 5 years of dedication and excellence at SJ Innovation
Performer of the Month - September 2025
SJ Innovation LLC
What others say
Testimonials.
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@ Madhav Ranganekar
COO, SJ Innovation LLC
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@ Caesar D'Silva
Project Manager, SJ Innovation LLC
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@ Pranav Ashok Rivankar
Jr. Software Project Coordinator L2, SJ Innovation LLC
If you have any projects in mind!