Kazi Tajnur Islam

Experience

• Senior Software Engineer L-1 · Vivasoft Limited

  Jan 2025 – Present · 1 yr 8 mos

  • 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.

• Software Engineer L-2 · Vivasoft Limited

  Jan 2023 – Dec 2024 · 2 yrs

  • 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.

• Software Engineer L-1 · Vivasoft Limited

  Jan 2021 – Dec 2022 · 2 yrs

  • 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.

Selected work

• Xsolla Login

  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.

  React · TypeScript · Webpack · Styled Components · Playwright · Datadog · React Intl

• Jonoshakti

  Realtime committee, election, and compliance workflows for a national-scale operations product — designed as a durable Next.js architecture, not a dashboard prototype.

  Next.js · Shadcn UI · Redux Toolkit · WebSocket · Tailwind CSS

• Rotate

  An analytics surface for air cargo — advanced dashboards, a living design system, and faster data paths over millions of operational records.

  Angular · RxJS · NestJS · MongoDB · Material UI · SCSS · Apache ECharts

• Delta Projects

  A legacy AdTech DSP moved onto a maintainable Next.js stack, with measurable Core Web Vitals gains and a tighter visual system.

  Next.js · Redux Toolkit · React Leaflet · Tailwind CSS · Ant Design · Jest · Docker

• Improve Digital Marketplace

  An ad management surface for Azerion, rebuilt for speed — page load cut by 60% while new features kept landing.

  Angular · NgRx · RxJS · Angular Bootstrap · CSS

• Butelka

  Azerion's DSP integration platform — authentication, API integration, and production UI built from a blank canvas.

  React · Ant Design · Recoil · Axios · CSS

• Key Performance Integrator

  Interactive performance charts and API-backed modules for PiHR, with partial front-end team leadership.

  React · TypeScript · Redux · CSS

• Toja Connected Water

  A supply-tracking product with paired user and admin panels, and custom analytics visualizations throughout.

  Next.js · TypeScript · Redux Toolkit · Tailwind CSS · Recharts

• Wellteam

  Client features for user and admin panels, with API integration and bottleneck removal on a fitness product.

  Next.js · TypeScript · React Query · Tailwind CSS · Axios

Skills

• Frontend: TypeScript (5 yrs), JavaScript (5 yrs), React (5 yrs), Next.js (5 yrs), Angular (3 yrs), HTML5 (5 yrs), CSS3 (5 yrs), Tailwind CSS (5 yrs), SCSS (4 yrs)
• State & data: Redux Toolkit (5 yrs), React Query (5 yrs), Zustand (2 yrs), NgRx (3 yrs), RxJS (3 yrs), Recoil (4 yrs), WebSocket (1 yr), REST APIs (5 yrs)
• Node.js & backend: Node.js (4 yrs), NestJS (2 yrs), MongoDB (5 yrs), MySQL (2 yrs), Docker (2 yrs), Micro-frontends (1 yr), Webpack (2 yrs), CI/CD (3 yrs)
• Quality: Jest (3 yrs), React Testing Library (3 yrs), Jasmine (1 yr), WCAG (5 yrs), Performance (5 yrs), Responsive design (5 yrs)

Education

BSc. in Computer Science and Engineering, Dhaka University of Engineering and Technology (DUET)Jul 2016 – Dec 2020 · 4 yrs 6 mos