Rohit Kumar
Senior Frontend Engineer
📍 Amsterdam, Netherlands
9+ years of experience architecting scalable, high performance applications in travel, fintech, real-estate and SaaS domains. Specializing in frontend architecture, system design, performance & accessibility.
Projects
Atlas Your Story
An itinerary creation and exploration app built with Flutter, enabling users to plan and discover travel experiences with an intuitive interface.
Key Challenges Solved:
- •Complex itinerary planning with drag-and-drop functionality
- •Real-time location services and map integration
- •Cross-platform mobile development with native performance
Weather App
A responsive weather application that provides real-time weather data through JSON feeds, designed for modern responsive web interfaces.
Key Challenges Solved:
- •Real-time weather data fetching and caching
- •Responsive design across all device sizes
- •Optimized performance with minimal API calls
Blog
Introduction to Micro Frontends
Explore the world of micro frontends architecture - from independent development and deployment to real-world implementation strategies. Learn from my experience scaling white-label platforms and building modular booking flows.
5 min read
Click to read on LinkedIn →
Monorepos and NX
Explore the benefits of monorepos and how the Nx tool can help manage large codebases efficiently. Learn about simplified development, shared code, easy testing, and better collaboration.
5 min read
Click to read on LinkedIn →
What is a Critical Rendering Path?
Deep dive into Critical Rendering Path (CRP) optimization for better web performance. Understand HTML parsing, CSS parsing, JavaScript execution, layout, and paint stages.
6 min read
Click to read on LinkedIn →
About Me
Professional Journey
Senior Frontend Engineer with 9 years of experience architecting scalable, high performance applications in travel, fintech, real-estate and SaaS domains. Proven record of owning end-to-end delivery, proposing & driving adoption of impactful solutions.
Specializes in frontend architecture, system design, and performance & accessibility. Experienced in mentoring engineers, stakeholder management and authoring technical documentation. Expert in React, Next.js, TypeScript, and modern web technologies.
Professional Experience
Senior Frontend Engineer
May 2024 – PresentIdentified, architected, and implemented an innovative and creative end-to-end white-label management system (WMS), from PoC to fully working product, cutting down launch time from 30 days to 3 days and cutting development cost from €30k to €3k; a solid 90% improvement, designed to support all future brands on the Vio platform
Active Scrum master in the team, facilitating scrum rituals like planning, retro, refinement sessions
Proposed, architected and implemented a micro-frontend SEM(Search Engine Optimization) package in NextJS; shipped 100k+ static pages, amplifying organic traffic by 27% and trimming load times by 1.8s
Contributed in migration of core search to Next.js (SSR/ISR); enhanced experience by 34% (Web Vitals) and elevated conversions by 14%
Owned and delivered multiple epics for product features running A/B tests and handling multiple stakeholders including Product, UX, Backend, and Analytics
Mentored peer engineers; embedded TDD practices; migrated legacy code, increased test coverage by 15% to 90% and cleaned tech debt thus improving overall codebase quality by 21% as per SonarQube KPIs
Development, documentation, and maintenance of multiple product features, ensuring that they meet user requirements and align with company objectives
Active member of frontend guild and AI guild, sharing learnings and latest trends with other engineers
Senior Frontend Engineer (Payments)
May 2021 – May 2024Led the payment-request initiative end-to-end; boosted pay request conversion by 43%, generating €3.75M+ annual revenue
Designed a secure multi-Stripe/OAuth/LDAP architecture; elevated transaction success rate by 34% across US/UK/CA
Collaborated with Product, UX, Backend, Analytics, and Stripe team to architect and code a solution for KYC upgrades as per DAC7 compliance, preventing permanent restrictions for 28% of users
Promoted TDD and accessibility standards as per WCAG benchmarks; improved automated test coverage by 19%, migrated class components to functional components, thus improving code quality by 23% as per SonarQube KPIs
Interviewed and on boarded new team members, mentored peers and juniors, and fostered a safe, collaborative environment
Senior Frontend Developer
Aug 2020 – Apr 2021Architected a Next.js, TypeScript payments UI; integrated 3 payment providers; increased payment success by 32%
Built a chatbot that decreased manual customer support agent effort by 48%, lowering support costs by 35%
Delivered an agent dashboard, enabling property sales agents to pitch properties 3× faster and improving lead conversion efficiency by 26%
Architected and delivered an optimized and reusable payment flow UI, reducing checkout failures by 31% and supporting more than 200k monthly transactions
Full Stack Developer
Jun 2018 – Jul 2020Built the BusHire tech team from scratch, actively interviewed and on-boarded new members hence forming a team of 7 engineers
Owned and delivered customer-facing modules (home page, mobile homepage, cancellation, payments, reviews, search results), driving a 23% increase in booking conversions and reducing checkout drop-offs by 18%
Architected and launched SEO-optimized web pages with an average Google PageSpeed score of 90+, boosting organic traffic by 42% and contributing to a 30% lift in non-paid bookings
Built a dashboard for 200+ operators, making it easier for them to manage bookings; halved reporting time by 50%
Full Stack Developer
Oct 2016 – Jun 2018Delivered fraud-detection dashboards (Node.js, React, SQL/NoSQL) deployed on AWS; sustained 99.9% uptime under production load
Worked with Compliance and Analytics to refine detection heuristics; decreased false positives by 23% and shortened investigation time by 30%
Senior Frontend Engineer
May 2024 – PresentIdentified, architected, and implemented an innovative and creative end-to-end white-label management system (WMS), from PoC to fully working product, cutting down launch time from 30 days to 3 days and cutting development cost from €30k to €3k; a solid 90% improvement, designed to support all future brands on the Vio platform
Active Scrum master in the team, facilitating scrum rituals like planning, retro, refinement sessions
Proposed, architected and implemented a micro-frontend SEM(Search Engine Optimization) package in NextJS; shipped 100k+ static pages, amplifying organic traffic by 27% and trimming load times by 1.8s
Contributed in migration of core search to Next.js (SSR/ISR); enhanced experience by 34% (Web Vitals) and elevated conversions by 14%
Owned and delivered multiple epics for product features running A/B tests and handling multiple stakeholders including Product, UX, Backend, and Analytics
Mentored peer engineers; embedded TDD practices; migrated legacy code, increased test coverage by 15% to 90% and cleaned tech debt thus improving overall codebase quality by 21% as per SonarQube KPIs
Development, documentation, and maintenance of multiple product features, ensuring that they meet user requirements and align with company objectives
Active member of frontend guild and AI guild, sharing learnings and latest trends with other engineers
Senior Frontend Engineer (Payments)
May 2021 – May 2024Led the payment-request initiative end-to-end; boosted pay request conversion by 43%, generating €3.75M+ annual revenue
Designed a secure multi-Stripe/OAuth/LDAP architecture; elevated transaction success rate by 34% across US/UK/CA
Collaborated with Product, UX, Backend, Analytics, and Stripe team to architect and code a solution for KYC upgrades as per DAC7 compliance, preventing permanent restrictions for 28% of users
Promoted TDD and accessibility standards as per WCAG benchmarks; improved automated test coverage by 19%, migrated class components to functional components, thus improving code quality by 23% as per SonarQube KPIs
Interviewed and on boarded new team members, mentored peers and juniors, and fostered a safe, collaborative environment
Senior Frontend Developer
Aug 2020 – Apr 2021Architected a Next.js, TypeScript payments UI; integrated 3 payment providers; increased payment success by 32%
Built a chatbot that decreased manual customer support agent effort by 48%, lowering support costs by 35%
Delivered an agent dashboard, enabling property sales agents to pitch properties 3× faster and improving lead conversion efficiency by 26%
Architected and delivered an optimized and reusable payment flow UI, reducing checkout failures by 31% and supporting more than 200k monthly transactions
Full Stack Developer
Jun 2018 – Jul 2020Built the BusHire tech team from scratch, actively interviewed and on-boarded new members hence forming a team of 7 engineers
Owned and delivered customer-facing modules (home page, mobile homepage, cancellation, payments, reviews, search results), driving a 23% increase in booking conversions and reducing checkout drop-offs by 18%
Architected and launched SEO-optimized web pages with an average Google PageSpeed score of 90+, boosting organic traffic by 42% and contributing to a 30% lift in non-paid bookings
Built a dashboard for 200+ operators, making it easier for them to manage bookings; halved reporting time by 50%
Full Stack Developer
Oct 2016 – Jun 2018Delivered fraud-detection dashboards (Node.js, React, SQL/NoSQL) deployed on AWS; sustained 99.9% uptime under production load
Worked with Compliance and Analytics to refine detection heuristics; decreased false positives by 23% and shortened investigation time by 30%
Technical Skills
What People Say About Me
“I have been working with Rohit for more than a year, in the Payments Team within HousingAnywhere. I have been mentoring and coaching him in my capacity as Engineering Manager of the Payments Team. He ...”
Deepthi Pradeep
Engineering Leader
HousingAnywhere B.V.
Engineering Manager - Payments Team
“It is my pleasure to recommend Rohit. I worked with him on critical projects of Payments team in HousingAnywhere B.V. He is a Frontend Engineer who have great skills and experience in planning and exe...”
Tricia Reyes
Lead Product Manager
HousingAnywhere B.V.
Payments Team Collaborator
“I am writing to enthusiastically recommend Rohit, a standout Frontend Software Engineer, based on our collaborative experience over the past 18 months. Rohit possesses a unique blend of technical expe...”
Oluwabukunmi Adebisi
Senior Frontend Engineer
HousingAnywhere B.V.
Payments Team Colleague
“I had the pleasure of working alongside Rohit for two years in the payments team, where I worked as a backend engineer. Rohit is a standout frontend engineer with a robust skill set, consistently deli...”
Lev Ospennikov
Engineering Manager
HousingAnywhere B.V.
Backend Team Colleague
“I have had the opportunity to collaborate with Rohit for the past 2.5 years, and I am happy to recommend him for his contributions to my team. I was a stakeholder on several projects in which he was r...”
Alejandra Valdes
Regulatory Compliance Lead
HousingAnywhere B.V.
Stakeholder & Project Collaborator
“Rohit worked with me in the payments team for HousingAnywhere. He consistently demonstrated an impressive ability to tackle complex front-end challenges with creativity and precision. He played a key ...”
Sanyam Dogra
Engineering Team Member
HousingAnywhere B.V.
Payments Team Colleague
“It's been a real pleasure to have worked with Rohit on the Modification Requests project at HousingAnywhere. What stood out to me was Rohit's incredible patience and grasp of the project's intricate d...”
Hamed Momeni
Cloud Infrastructure Engineer
HousingAnywhere B.V.
Cross-team Project Collaborator
“I worked with Rohit for more than one year in CGI. He is very good fellow to work with very good technical skills as well as great interpersonal skills. His collaborative approach and technical expert...”
Kumar Saurabh
Frontend Developer
CGI Inc.
Team Colleague
“He is an awesome fullstack developer and a good human. Rohit's technical skills and collaborative nature make him an excellent team member who consistently delivers quality work.”
Utkarsh Srivastava
Full-stack Engineer
CGI Inc.
Cross-team Colleague
“I have worked with Rohit on multiple projects and it is a delight to have a companion like him who is a true team player and hard worker. His knack for exploring and understanding new technologies has...”
Akshay Choudhary
Product Leadership
CGI Inc.
Project Collaborator
“Rohit is such a delightful person to have around. He is always open to ideas and suggestions. He has made me improve in many professional areas. It was a pleasure to work with him.”
Yash Bathia
Senior Software Engineer
NoBroker Technologies
Team Colleague
“I have worked with Rohit for many web based tasks. He is great at building frontend as well as backend systems which work efficiently.”
Vishnu Shenoy
Software Engineer
redBus
Team Colleague
“I've worked with Rohit on an android module. He has sound technical knowledge in native Android app development.”
Rachan Chatra
Senior Software Engineer - Android
redBus
Android Module Collaborator
Contact
Get In Touch
Ready to discuss your next project or explore collaboration opportunities? I'd love to hear about your vision and how we can bring it to life.
