What developer roles is Kazi Tajnur Islam available for?

Frontend developer, full-stack developer, JavaScript developer, and Node.js developer roles — including senior engineering and frontend architecture. Open to remote work and collaborations from Dhaka, Bangladesh.

What technologies does Tajnur specialize in?

JavaScript and TypeScript across the stack: React, Next.js, and Angular on the frontend; Node.js, NestJS, and MongoDB when the work is full-stack. Also Webpack micro-frontends, CI/CD, and performance work on Core Web Vitals.

Is Tajnur a frontend or full-stack developer?

Both. The core is senior frontend engineering — React, Next.js, Angular — with production Node.js and NestJS work on products like Rotate. Hire for frontend-heavy or JavaScript full-stack roles.

Kazi Tajnur Islam | Frontend & Full-Stack JavaScript Developer

01 — Selected work

Products under real constraint.

Frontend and full-stack case studies in React, Next.js, Angular, and Node.js — authentication, operations, and analytics products shipped under real production constraint.

01
Xsolla Login
Global authentication system
A secure admin dashboard and SDK surface for a global commerce platform — OAuth2, MFA, and 40+ social providers, built to stay fast at international scale.
May 2025 – Feb 2026 · 10 mos/React · TypeScript · Webpack · Styled Components
Case
02
Jonoshakti
Social and political operations platform
Realtime committee, election, and compliance workflows for a national-scale operations product — designed as a durable Next.js architecture, not a dashboard prototype.
Mar 2025 – Jul 2025 · 5 mos/Next.js · Shadcn UI · Redux Toolkit · WebSocket
Case
03
Rotate
Air cargo analysis platform
An analytics surface for air cargo — advanced dashboards, a living design system, and faster data paths over millions of operational records.
Sep 2024 – May 2025 · 9 mos/Angular · RxJS · NestJS · MongoDB
Case

More engagements

02 — Path

Tenure, computed — not copied.

Senior JavaScript engineering at Vivasoft: React, Next.js, and Node.js delivery from Software Engineer L-1 through Senior Software Engineer L-1.

Jan 2025 – Present · 1 yr 8 mos
Senior Software Engineer L-1
Vivasoft Limited/Dhaka, Bangladesh
- —Led the microservices frontend architecture for Jonoshakti using Next.js, Shadcn/ui, and WebSockets for realtime financial and election compliance tracking.
- —Introduced SSR and tighter state handling, cutting Time to Interactive by 20% on heavy data dashboards.
- —Engineered a reusable internal component library used across 3+ products, reducing sprint delivery time by 45%.
- —Ran code reviews and technical workshops for a team of 5, holding 85% test coverage.
Jan 2023 – Dec 2024 · 2 yrs
Software Engineer L-2
Vivasoft Limited/Dhaka, Bangladesh
- —Built advanced visualization modules for financial-adjacent cargo datasets, processing millions of points with Apache ECharts and RxJS.
- —Migrated a legacy AdTech DSP to Next.js and Redux Toolkit, using code splitting and lazy loading to improve LCP by 60%.
- —Partnered with backend and design to ship high-performance APIs into production-quality interfaces.
Jan 2021 – Dec 2022 · 2 yrs
Software Engineer L-1
Vivasoft Limited/Dhaka, Bangladesh
- —Shipped Toja Connected Water end-to-end in Next.js and TypeScript, covering user and admin surfaces with Recharts analytics.
- —Built the frontend for Key Performance Integrator (PiHR) with interactive charts and Redux, including cross-browser support.
- —Delivered mobile-first interfaces with 98/100 Lighthouse scores for accessibility and performance.

03 — Craft

Tools with time attached.

Frontend, Node.js, and full-stack skills with years attached — TypeScript, React, Next.js, Angular, NestJS, and MongoDB.

Frontend

TypeScript5 yrs
JavaScript5 yrs
React5 yrs
Next.js5 yrs
Angular3 yrs
HTML55 yrs
CSS35 yrs
Tailwind CSS5 yrs
SCSS4 yrs

State & data

Redux Toolkit5 yrs
React Query5 yrs
Zustand2 yrs
NgRx3 yrs
RxJS3 yrs
Recoil4 yrs
WebSocket1 yr
REST APIs5 yrs

Node.js & backend

Node.js4 yrs
NestJS2 yrs
MongoDB5 yrs
MySQL2 yrs
Docker2 yrs
Micro-frontends1 yr
Webpack2 yrs
CI/CD3 yrs

Quality

Jest3 yrs
React Testing Library3 yrs
Jasmine1 yr
WCAG5 yrs
Performance5 yrs
Responsive design5 yrs

Education

BSc. in Computer Science and Engineering

Dhaka University of Engineering and Technology (DUET)

Jul 2016 – Dec 2020 · 4 yrs 6 mos

Languages

EnglishFluent
BengaliNative

Signal

Competitive programming
650+ LeetCode problems and 1,500+ challenges across judges. 3x ICPC Dhaka Regional, ranking among the top 70 teams.
Teaching at scale
70+ technical workshops as Lead Instructor at Interactive Cares and Ostad, plus instructor and mentor for Vivasoft Learnathon 2.0.
Community
Founder and former President (2020-2022) of the Bangladesh Open University Computer Club.

04 — Voice

People I have shipped with.

Leads and collaborators on React, Angular, and Node.js products — on reliability, ownership, and shipping.

I had the pleasure of working with Tajnur as his tech lead, and I can confidently say he was one of the most dependable and technically solid engineers on the team. He consistently delivered clean code, took ownership of complex features, and was always open to feedback. He had a grounded presence and was someone the team could really rely on. No doubt he'll thrive in his new role.
Hassen Elberkennou/Technical Lead, Rotate
I can confidently say that Tajnur is an exceptional Front-end developer with deep expertise in JavaScript, TypeScript, React.js, Next.js, Angular, Node.js, and MongoDB. With many years of experience, he consistently delivers clean, efficient, and scalable solutions. At Vivasoft Limited, he has proven to be a problem solver who takes ownership of tasks and drives projects to success. If you're looking for a skilled, passionate, and dedicated developer, Tajnur is definitely someone you'd want on your team!
Md. Imrul Hasan/Senior Staff Software Engineer, Vivasoft
Tajnur is a top-notch freelancer. He completed the project with exceptional speed and precision, exceeding all expectations. Communication was seamless, and he was always responsive and proactive. I highly recommend him to anyone who needs high-quality work delivered promptly.
Nathaniel Melendrez/Web Developer, Infor

05 — Contact

A short note is enough.

Hire a frontend, full-stack, JavaScript, or Node.js developer in Dhaka, or remotely. A short note is enough.

tajnur007@gmail.com

Available for select collaborations. Based in Dhaka, Bangladesh. Phone is public if you prefer a call.

+880 1721-919296

What developer roles is Kazi Tajnur Islam available for?: Frontend developer, full-stack developer, JavaScript developer, and Node.js developer roles — including senior engineering and frontend architecture. Open to remote work and collaborations from Dhaka, Bangladesh.
What technologies does Tajnur specialize in?: JavaScript and TypeScript across the stack: React, Next.js, and Angular on the frontend; Node.js, NestJS, and MongoDB when the work is full-stack. Also Webpack micro-frontends, CI/CD, and performance work on Core Web Vitals.
Is Tajnur a frontend or full-stack developer?: Both. The core is senior frontend engineering — React, Next.js, Angular — with production Node.js and NestJS work on products like Rotate. Hire for frontend-heavy or JavaScript full-stack roles.

KaziTajnur Islam

Products under real constraint.

Xsolla Login

Jonoshakti

Rotate