Krishna Kumar
👋 I’m a Senior Frontend Engineer | Performance & Scale Enthusiast
🚀 About Me
8+ years of experience building and owning high-scale web platforms with a laser focus on performance, conversion optimization, and scalable UI architecture. I thrive at the intersection of user experience and technical excellence, driving measurable impact across critical customer journeys.
- 🎯 Current Focus: Frontend architecture, SSR, micro-frontends, and web performance
- 💡 Passion: Experimenting at scale and building products that convert
- 🌱 Learning: Always exploring new frontend technologies and optimization techniques
- 🤝 Collaboration: Strong believer in cross-functional teamwork and mentorship
💼 Professional Experience
Senior Frontend Engineer @ Tesco (2026 - Current)
🎨 Platform Modernization
- Currently migrating a monolithic Next.js 14 application to Next.js 16, transitioning toward a Micro-Frontend (MicroFE) architecture. Working on decoupling core features into independently deployable modules to improve scalability, maintainability, and team autonomy, while preserving a seamless and consistent user experience.
Senior Frontend Engineer @ Razorpay (2019 - 2025)
🎨 Platform Modernization & Performance
- Migrated multi-step Signup from Angular → React, driving ~10% conversion uplift
- Architected React SSR website: LCP ~3.8s → ~2.1s, FCP reduced by ~40%
- Enabled international expansion through comprehensive i18n implementation
💳 Payment Integration & Growth
- Technical lead for Apple Pay on Svelte Checkout: ~20% Success Rate improvement, ~2% GMV growth
- Executed phased rollouts with data-driven experimentation
⚡ Developer Experience & Innovation
- Designed config-driven modular onboarding micro-frontends, reducing launch time by ~30%
- Built AI conversational chatbot UI for product discovery: ~8% CTR uplift
- Created API playground standardizing developer workflows, improving engagement by ~20%
- Led A/B experimentation infrastructure using AWS Lambda
👥 Leadership & Mentorship
- Mentored team members on best practices and modern frontend architecture
- Drove frontend technical decisions across multiple high-impact projects
⚡ OSS contribution
- https://github.com/razorpay/blade
Frontend Developer @ Cybage Software (2018)
- Built responsive web applications using React.js, HTML5, and CSS3
- Delivered scalable features and reusable UI components in collaboration with design and QA teams
🛠️ Tech Stack
Languages & Frameworks
const skills = {
languages: ['JavaScript', 'TypeScript'],
frameworks: ['React', 'Svelte'],
others: ['CSS3', 'HTML5', 'Responsive Design', 'TailwindCss']
}
Frontend Systems
- Server-Side Rendering (SSR)
- Micro-frontends Architecture
- Component-Based Design Systems
Performance & Optimization
- Core Web Vitals Optimization
- Web Performance Engineering
- Lighthouse Scoring
Product & Growth
- A/B Testing & Experimentation
- Conversion Rate Optimization (CRO)
- Internationalization (i18n)
Platforms Built
- 🤖 AI Chatbot Interfaces
- 📊 User Dashboards
- 🔧 API Playgrounds
- 🛒 Checkout Systems
🎨 Featured Projects
GetMyTimeBack - Focus Time Tracker github
A minimalist productivity app with a sleek retro UI that helps you track and analyze your work focus sessions. Vibe-coded for a rapid, creative build experience.
Key Features:
- ⏱️ Simple focus time logging with intuitive interface
- 📊 Insights dashboard to visualize productivity patterns
- 🎯 Track work sessions and identify distraction patterns
- ⚡ Built with React & Tailwind CSS for a swift, responsive experience
- 🎵 Developed through vibe coding - fast, creative, and flow-state driven
Impact: Helps users understand their work habits and optimize their focus time through data-driven insights.
📊 Impact Highlights
Performance Improvements:
├─ LCP: 3.8s → 2.1s (45% faster) ⚡
├─ FCP: 40% reduction 🚀
└─ Success Rate: +20% improvement 📈
Business Metrics:
├─ Conversion: +10% uplift 💰
├─ GMV Growth: +2% impact 💳
├─ CTR: +8% improvement 🎯
└─ Launch Time: -30% reduction ⏱️
🎓 Education
B.Tech in Information Technology
KIIT University, Bhubaneswar | 2016 | CGPA: 8.12
Senior Secondary, CBSE
Holy Cross School, Ranchi | 2012
📫 Let’s Connect
I’m always open to discussing frontend architecture, performance optimization, or collaboration opportunities!
- 📧 Email: krishnaacc123@gmail.com
- 💼 LinkedIn: linkedin.com/in/krishna9199
- Github: 0xkrishna17