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Jeevan Kumar RJR
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Jeevan Kumar R

@jeevankumarr

Senior Frontend Developer & Full-Stack Engineer | React, Next.js, TypeScript, Node.js | AI-Powered Web Apps | Micro Frontends & Performance | 8+ Years

India
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What I'm looking for

Iโ€™m seeking Frontend Developer opportunities focused on modern React ecosystems, scalable UI engineering, and strong ownershipโ€”delivering high-quality experiences with measurable performance gains and reliable automated testing.

Iโ€™m a Senior Frontend Developer and Full-Stack Engineer with 8+ years of experience building fast, scalable React, Next.js and TypeScript applications for clients including Goldman Sachs and Pilot Company, and across healthcare and e-commerce. I specialize in micro-frontend architecture, reusable component libraries and frontend performance, and Iโ€™m comfortable across the stack with Node.js, BFF and GraphQL.

๐—ช๐—ต๐—ฎ๐˜ ๐—œโ€™๐˜ƒ๐—ฒ ๐—ฑ๐—ฒ๐—น๐—ถ๐˜ƒ๐—ฒ๐—ฟ๐—ฒ๐—ฑ:
โ€ข Led end-to-end frontend delivery of an enterprise Kiosk application at Publicis Sapient: on-time production launch with zero critical post-release defects.
โ€ข Cut page load times ~35% through lazy loading, code splitting and Redux optimizations; raised test coverage from 42% to 78%, reducing regression defects ~40%.
โ€ข At EY for Goldman Sachs, independently delivered 5+ micro-frontend modules with Webpack Module Federation (+30% deployment efficiency) and built design-system data grids reused across 3 applications.
โ€ข Built reusable React component libraries adopted across 3 teams (~25% less duplicate effort).

๐—›๐—ผ๐˜„ ๐—œ ๐˜„๐—ผ๐—ฟ๐—ธ: I turn Figma designs into responsive UIs and own features end to end, from API contracts through CI/CD and production monitoring (Splunk RUM, Mixpanel), shipping safely with feature flags and gradual rollouts. I use AI-assisted development (GitHub Copilot, Claude) while owning code quality, security and correctness, and I build AI-powered features on LLM APIs. My personal project PerfLens (Next.js, Gemini) runs live Lighthouse audits and generates validated recommendations. Iโ€™m now adding a RAG pipeline and an MCP server to it; that work is in progress and not yet complete.
Earlier in my career I built healthcare applications with React.js and REST APIs at Cerner and e-commerce iOS applications in Swift with Stripe payments at Pricifly. Projects Iโ€™ve contributed to include the Kiosk Application, Taxonomy User Data Platform and Appointment Scheduling Application.
๐—–๐—ผ๐—ฟ๐—ฒ ๐˜€๐˜๐—ฎ๐—ฐ๐—ธ: React.js, Next.js, TypeScript, JavaScript (ES6+), Node.js, GraphQL, Redux, Micro Frontends, Figma, Jest, React Testing Library, Playwright, CI/CD.
๐—˜๐—ฑ๐˜‚๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป: Master of Computer Applications (MCA), VTU-affiliated institution; Bachelorโ€™s Degree, Bangalore University.
๐—ฅ๐—ฒ๐—ฐ๐—ผ๐—ด๐—ป๐—ถ๐˜๐—ถ๐—ผ๐—ป: Hands-On Recognition at Publicis Sapient (Q2 and Q4 2025); You Rock Award at Cerner.

Experience

Work history, roles, and key accomplishments

PS
Current

Senior Frontend Developer

Feb 2024 - Present (2 years 9 months)

Spearheaded end-to-end frontend delivery of the Kiosk application, achieving an on-time production launch with zero critical post-release defects and reducing page load times by nearly 35%. Improved UI consistency and development turnaround by 30% by building responsive React.js/TypeScript interfaces from Figma designs and increasing automated test coverage from 42% to 78% (reducing regression def

EY logoEY

Senior Frontend Developer

Feb 2022 - Feb 2024 (2 years)

Worked on enterprise frontend applications for Goldman Sachs using React.js, TypeScript, Redux, and Redux-Saga. Architected scalable state management workflows, independently delivered Micro Frontend modules, management applications. Collaborated with backend engineering teams, product owners, and QA teams for frontend optimization

Cerner Healthcare Solutions logoCS

Senior Frontend Developer

Cerner Healthcare Solutions

Oct 2019 - Jan 2022 (2 years 3 months)

Built healthcare web applications using React.js and Ruby on Rails, improving interface responsiveness and streamlining patient workflows. Improved real-time appointment scheduling efficiency by 3x and enabled 40% faster access to procedure information via proxy-based portals using React.js and Redux.

PR

iOS Developer

Pricifly

Nov 2018 - Sep 2019 (10 months)

Enhanced and launched scalable e-commerce iOS applications, achieving App Store deployment using Swift and Agile delivery practices. Integrated the Stripe payment gateway, improving development efficiency by 25% and streamlining secure transactions.

Education

Degrees, certifications, and relevant coursework

VI

VTU Affiliated Institution

Master of Computer Applications (MCA), Computer Applications

2014 - 2017

Completed a Master of Computer Applications (MCA) program from 2014 to 2017 at a VTU-affiliated institution.

BU

Bangalore University

Bachelor's Degree

2011 - 2014

Earned a bachelor's degree from Bangalore University from 2011 to 2014.

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