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I'm a senior UI engineering leader with 19+ years of experience architecting and delivering large-scale React-based frontend platforms across BFSI, retail, and enterprise domains. I specialize in modern React ecosystems (Next.js, TypeScript, Redux, Zustand, Tailwind, Vite, Webpack) with a deep focus on performance, scalability, accessibility, and cloud-native delivery. I lead microfrontend architectures, design systems, and AI-enabled user experiences, while driving engineering excellence, governance, and high-performing teams. I’m a hands-on leader who has delivered mission-critical applications with 99.99% uptime, zero-downtime deployments, and AI-assisted frontend innovations (Neptune AI, Slingshot AI, Quizme).…I'm a senior UI engineering leader with 19+ years of experience architecting and delivering large-scale React-based frontend platforms across BFSI, retail, and enterprise domains. I specialize in modern React ecosystems (Next.js, TypeScript, Redux, Zustand, Tailwind, Vite, Webpack) with a deep focus on performance, scalability, accessibility, and cloud-native delivery. I lead microfrontend architectures, design systems, and AI-enabled user experiences, while driving engineering excellence, governance, and high-performing teams. I’m a hands-on leader who has delivered mission-critical applications with 99.99% uptime, zero-downtime deployments, and AI-assisted frontend innovations (Neptune AI, Slingshot AI, Quizme).

Koustubh Desai

Web Developer, Architect, Data Scientist, +7

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I'm a senior UI engineering leader with 19+ years of experience architecting and delivering large-scale React-based frontend platforms across BFSI, retail, and enterprise domains. I specialize in modern React ecosystems (Next.js, TypeScript, Redux, Zustand, Tailwind, Vite, Webpack) with a deep focus on performance, scalability, accessibility, and cloud-native delivery. I lead microfrontend architectures, design systems, and AI-enabled user experiences, while driving engineering excellence, governance, and high-performing teams. I’m a hands-on leader who has delivered mission-critical applications with 99.99% uptime, zero-downtime deployments, and AI-assisted frontend innovations (Neptune AI, Slingshot AI, Quizme).…I'm a senior UI engineering leader with 19+ years of experience architecting and delivering large-scale React-based frontend platforms across BFSI, retail, and enterprise domains. I specialize in modern React ecosystems (Next.js, TypeScript, Redux, Zustand, Tailwind, Vite, Webpack) with a deep focus on performance, scalability, accessibility, and cloud-native delivery. I lead microfrontend architectures, design systems, and AI-enabled user experiences, while driving engineering excellence, governance, and high-performing teams. I’m a hands-on leader who has delivered mission-critical applications with 99.99% uptime, zero-downtime deployments, and AI-assisted frontend innovations (Neptune AI, Slingshot AI, Quizme).

Available to hire

I’m a senior UI engineering leader with 19+ years of experience architecting and delivering large-scale React-based frontend platforms across BFSI, retail, and enterprise domains. I specialize in modern React ecosystems (Next.js, TypeScript, Redux, Zustand, Tailwind, Vite, Webpack) with a deep focus on performance, scalability, accessibility, and cloud-native delivery.

I lead microfrontend architectures, design systems, and AI-enabled user experiences, while driving engineering excellence, governance, and high-performing teams. I’m a hands-on leader who has delivered mission-critical applications with 99.99% uptime, zero-downtime deployments, and AI-assisted frontend innovations (Neptune AI, Slingshot AI, Quizme).

Skills

Experience Level

Expert

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Intermediate

Language

English

Fluent

Work Experience

Architect & Senior Architect at Publicis Sapient

November 1, 2019 - Present

Led architecture and hands-on engineering of scalable cloud-native platforms. Designed microservices-based backend systems to support high transaction volumes. Defined database strategies (relational and NoSQL) and built event-driven API layers enabling real-time workflows. Conducted code reviews, performance tuning, and deployment architecture; directed 45+ engineers and established CI/CD, observability, and rollback-safe deployments. Built reusable design systems and automation accelerators, delivering UI platforms with 99.99% availability.

Architect & Senior Architect at Teamware Solutions

August 1, 2018 - March 1, 2019

Modernized a mission-critical wealth-management platform for Morgan Stanley. Architected service-driven backend integrations for payments and payees; improved performance by 50% and reduced memory footprint by 66%. Enforced strict code quality, governance, and security controls, collaborating with business and technology leadership in a regulated BFSI environment.

Architect & Senior Architect at Logixal Solutions Pvt. Ltd.

November 1, 2017 - July 1, 2018

Delivered a large-scale React + Node.js commerce platform with optimized UX and session management. Improved feature delivery velocity through optimized state and API layers; supervised cross-geography teams ensuring high availability, scalability, and accessibility.

Sr Dev, Team Lead & Architect at Mphasis Ltd.

April 1, 2015 - October 1, 2017

Architected front-end and backend modernization projects for BFSI and travel loyalty clients. Implemented microservices-based loan and product platforms, ensuring data integrity and API scalability. Collaborated with business units to enable rapid prototyping, testing, and delivery through Agile practices.

Sr Dev, Team Lead at Cognizant Technology Solutions Pvt. Ltd.

October 1, 2012 - April 1, 2015

Designed UI modernization across retail, pharma, and finance brands. Acted as SPOC for accessibility and performance, conducting audits and remediation for multiple brands. Created reusable component frameworks, improving maintainability across portfolios.

Sr Dev, Team Lead at Bombayworks Solutions Pvt. Ltd.

August 1, 2009 - August 1, 2012

Delivered dynamic web systems using PHP + MySQL, ensuring performance and reliability. Built CMS-driven sites, Flash projects, and marketing portals with pixel-perfect delivery. Supervised small teams for UI delivery, testing, and release management.

Web Programmer at Zeus Learning Pvt. Ltd. (Renamed to Enabilon Pvt Ltd)

July 1, 2008 - March 1, 2009

Developed interactive e-learning modules and games using Flash, ActionScript, and JavaScript. Built reusable components improving delivery speed and reducing asset duplication.