~/kumar-sidharth — whoami
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Kumar Sidharth

Lead Software Engineer, 9 Years — Architecting micro-frontends and AI-driven tooling at enterprise scale
📍 Bangalore, India
const stack = [
React.jsTypeScriptNode.jsNext.jsGraphQLMicro-frontendsMCPAWS
];
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summary

Lead Software Engineer with 9 years of experience architecting highly scalable web applications and microservices using TypeScript, React.js, and Node.js. Specialized in driving enterprise micro-frontend architecture and Backend-for-Frontend (BFF) patterns. Proven track record of slashing performance bottlenecks, enforcing AA accessibility standards, and architecting AI-driven agentic tooling and MCP-based systems.

experience
Optum Current
Lead Software Engineer (via Publicis Sapient) · Dec 2023 – Present · Bangalore
+Architected enterprise-scale micro-frontends and shared component libraries in TypeScript/React, enabling scalable UI delivery across 30 distributed teams.
+Resolved performance bottlenecks via observability tooling, lifting Lighthouse scores from 72 → 98 and enforcing WCAG 2.2 AA compliance.
+Re-architected a decision-tree chatbot into an MCP-driven conversational system with dynamic tool-calling, deployed on AWS EC2 — cut support escalations by 80%.
+Built an LLM-powered migration tool automating state-management transitions, turning weeks into 3 days — Won Optum AI Hackathon 2026.
Reliance Retail (Fynd)
Lead Software Engineer · Dec 2022 – Dec 2023 · Bangalore
+Engineered a Node.js async webhook server for microservice events, cutting cloud costs by 20%.
+Resolved duplicate logic across 50 dependent teams with a POC micro-frontend architecture using BFF patterns, driving org-wide adoption.
+Slashed landing page load from ~2000ms → 250ms via SSG and edge delivery, boosting SEO crawlability and retention.
Joveo
Senior Frontend Developer · May 2021 – Nov 2022 · Hyderabad
+Accelerated workflow page load from 3s → 0.2s via Next.js SSG, ISR and code splitting — 35% lift in retention.
+Migrated CI/CD from Jenkins to GitHub Actions, streamlining deployments across the frontend platform.
+Mentored a 5-engineer agile team and led i18n implementation, scaling the product across 26 languages.
Siemens
Software Developer (via Simeio and Valuesoft Info) · Jun 2017 – May 2021 · Bangalore
+Built the AI-Rad Companion Brain MR plugin in React.js, translating complex medical requirements into clinician-friendly UI workflows.
+Sustained 90%+ code coverage through rigorous Jest testing and CI/CD discipline.
Skills
languages
JavaScript (ES6+)TypeScriptHTML5CSS3 / SCSSShell Script
frontend
React.jsNext.jsReduxZustandAccessibilityStorybookViteReact RouterTailwind
backend
Node.jsGraphQLRESTJWTExpress.jsSQLMongoDBRedisMCP
tools & cloud
GitGitHub ActionsJestPlaywrightDockerKubernetesAWS EC2S3CloudFrontRoute53Cognito
methodologies
System DesignMicroservicesMicro-frontendsAgile / ScrumWeb Security (OWASP)SEOWeb Performance
recognition

Awards

★
AI Hackathon Winner — Best AI Agent
Optum, 2026
★
Design Thinking Award
Reliance Retail, 2023 — Innovative product design & cost reduction
★
Code Quality Award
Siemens, 2021 — Highest department-wide code standards
★
Spot Award
Siemens, 2020 — Exceptional project ownership
★
Star of Simeio
Simeio, 2019 — Consistent performance
open source

Contributions

oat-ui
Ultra-lightweight web component library created by Kailash Nadh (CTO, Zerodha).
Contribution: automatic show/hide error logic
nitrogen-react
React component library inspired by the Nitrogen design system.
Contribution: updated types in pagination logic
fdk-extension-utils-javascript
Node.js library managing billing flow for the Fynd ecommerce platform.
Contribution: implemented free-plan management for trial customers
12-column-grid
Highly customizable, ultra-lightweight CSS grid utility library written in SCSS.
Created and owned by me — used across multiple projects at Siemens
education & certifications

Foundations

B.E., Computer Science and Engineering
Bangalore Institute of Technology (VTU) · 2013 – 2017