Staff Software Engineer · Open to new opportunities

Rahul
Kumar

Staff Software Engineer · Frontend Platform & Architecture · AI/Agent-enabled Systems · Developer Platforms

I architect and scale the frontend platform powering 1200+ applications and 3500+ developers at Walmart Global Tech — driving standardisation, AI-assisted developer workflows, and the infrastructure layer that lets engineering teams move faster, together.

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12+
Years Experience
1200+
Apps Powered
3500+
Devs Enabled
6
Public Projects
About

Building Systems
That Scale

I'm a Staff Software Engineer (Frontend Platform) with 12+ years of experience building the infrastructure layer that powers other engineers' work — shared libraries, extensibility models, and developer-facing platforms used across multi-team environments at scale.

Currently at Walmart Global Tech, I lead architecture and technical strategy for a platform powering 1200+ applications and enabling 3500+ developers. I've driven the shift from library-based abstractions to AI/agent-driven models — introducing MCP (Model Context Protocol), AST codemods, and agent-based workflows that reshape how teams interact with the platform.

My work lives at the intersection of platform engineering, developer experience, and AI tooling: reducing friction, standardising patterns, and making sure the next engineer to join the codebase is grateful they did.

"Engineering is not just about writing code. It's about making decisions that age well."

🏗
Platform Thinking
I build the layer that accelerates other teams — shared libraries, extensibility frameworks, and reusable architecture that eliminates redundant work across orgs.
📐
Architecture Reviews
Cross-team technical alignment, scalable design decisions, and long-term backward-compatibility strategy that lets platforms evolve without breaking consumers.
🧑‍🏫
Mentorship & Culture
Mentoring senior engineers on library design principles, performance trade-offs, and the kind of platform thinking that separates good engineers from great ones.
⚡
Developer Productivity
Translating systemic developer workflow friction into platform-level solutions — from CI/CD modernisation to standardised onboarding that cuts setup time from a week to under an hour.
🤖
AI-Assisted Platforms
Pioneering MCP-based developer tools, AI-powered migration agents, and AST codemods that automate large-scale codebase transformations — turning manual platform work into one-command workflows.
Expertise

Core Skills

🧩
Platform & Architecture
Frontend Architecture Design Systems Micro-Frontends Monorepos System Design API Design Platform Governance Module Federation Extensibility & Versioning
⚛️
Frontend
React TypeScript Next.js Angular Redux Webpack Vite Storybook Web Performance MERN / MEAN
🖥
Backend & APIs
Node.js Fastify Express REST APIs GraphQL
🚀
DevOps & Infrastructure
CI/CD GitHub Actions AWS S3 AWS Lambda Azure Docker Kubernetes Performance Optimization Release Governance
🤖
AI & Developer Tooling
LLM Integration MCP (Model Context Protocol) AI Agents AST Codemods jscodeshift Automated Code Migration Developer Productivity OpenFeature SDK
Career

Work Experience

May 2026 — Present
Walmart Global Tech
Bengaluru, India
Staff Software Engineer (Frontend Platform)
  • Proposed and drove an org-wide framework migration initiative — authored technical strategy adopted by leadership, shipped 4 AI-powered migration tools targeting hundreds of legacy apps, projecting thousands of engineering hours saved.
  • Built a full-stack analytics platform from scratch in 3 weeks — scanning thousands of repositories, classifying apps by framework version and deployment status, with 98% API call reduction via batched GraphQL optimisation.
  • Hardened an OpenFeature-compliant feature flag SDK to production-grade resilience — 100% test coverage (232 tests), graceful degradation with never-throw contracts, and exponential backoff polling.
  • Built 6 production AST codemods (jscodeshift) to automate large-scale codebase migrations, with comprehensive test suites covering 10 transform categories.
  • Published design documents, architecture RFCs, and data-driven strategy materials for every major initiative — directly influencing org-wide platform direction.
  • Led architecture reviews and authored technical specifications influencing frontend decisions across distributed teams.
Jan 2023 — May 2026
Walmart Global Tech
Bengaluru, India
Senior Software Engineer (Frontend Platform)
  • Owned and evolved a frontend platform powering 1200+ applications in a large-scale distributed system, enabling 3500+ developers via standardised bootstrapping and shared libraries.
  • Architected a reusable React + TypeScript framework reducing app setup time from ~1 week to ~1 hour; defined semver and compatibility layers enabling adoption across 300+ production apps without breaking changes.
  • Led React 19, Next.js 15, and Fastify 5 upgrades across the platform starter kit ecosystem.
  • Redesigned SSO/OAuth authentication flow across the platform's starter kit ecosystem.
  • Created the platform's first AI-assisted developer tool using MCP (Model Context Protocol), establishing the pattern for AI-driven developer workflows.
  • Mentored senior engineers on library design principles, performance trade-offs, and platform-first thinking.
Apr 2022 — Jan 2023
Alstom
Bengaluru, India
Technical Expert / UI Architecture Lead
  • Led frontend architecture for 4 enterprise platforms (THEMIS, ORION, APSYS, SPDB), serving as Project Manager and Scrum Master.
  • Implemented CI/CD pipeline reducing deployment cycles from weeks to hours, improving team productivity by 30%.
  • Improved deployment efficiency by ~40% via pipeline optimisation and automation.
  • Managed team of 5 developers; conducted architecture reviews and technical interviews.
Apr 2020 — Mar 2022
Alstom
Bengaluru, India
Software Development Specialist
  • Designed scalable UI architecture and modular patterns adopted across multiple product teams.
  • Drove strategy, roadmap, and execution for product delivery; translated product requirements into technical specifications.
  • Conducted domain-specific sessions as SME; identified and mitigated product risks proactively.
  • Owned end-to-end delivery as individual contributor and Scrum Master.
Jun 2017 — Apr 2020
PowerSchool
Group LLC
Software Engineer (Full Stack)
  • Built multiple full-stack MEAN applications from architecture to production.
  • Owned performance optimisation, API design, and frontend scalability improvements.
  • Delivered greenfield applications with complete lifecycle ownership.
Nov 2016 — Jun 2017
SelotSoft
Software Developer
Software Developer — Rewards & Shipping
  • Built WillU — a client-facing reward redemption application using Angular 1.8 and Node.js, end-to-end from UI to API integration.
  • Developed frontend for a logistics and shipping domain platform — scalable, responsive UI components improving operator workflows and reducing data entry errors.
  • Collaborated closely with backend teams to integrate REST APIs and ensure seamless data flow across both applications.
  • Contributed to performance optimisation efforts, improving page load times for data-heavy dashboards.
Nov 2014 — Oct 2016
UST Global
Software Developer
Software Developer — Healthcare Insurance & Retail
  • Developed scalable UI applications across healthcare insurance and retail domains using AngularJS, JavaScript, and Gulp.
  • Built reusable frontend components supporting complex business workflows in both Java-based and Node.js-based application stacks.
  • Worked within cross-functional agile teams to deliver features across the full software development lifecycle.
  • Gained strong foundations in UI architecture, API integration, and delivering robust enterprise software under strict quality standards.
GitHub

Open Source & Projects

🔧 New
frontend-migration-kit
Production-tested jscodeshift codemods for React/TypeScript migrations — class→hooks, CJS→ESM, prop-types→TS, Enzyme→RTL, React Router v5→v6.
TypeScript · jscodeshift · Vitest · Node.js CLI
🤖 New
mcp-devtools
4 MCP servers that give AI assistants frontend superpowers — bundle analysis, accessibility audits, Lighthouse, and component-docs via TypeScript compiler.
TypeScript · MCP · Playwright · ts-morph
🚀 New
create-platform-app
Scaffold production-ready React/Next.js/Node.js apps with enterprise patterns in under a minute — Auth.js, OpenFeature flags, Swagger, GitHub Actions CI.
TypeScript · Fastify · Next.js 15 · Auth.js · OpenFeature
🔬 Live ↗
codemod-studio
Write, test and preview jscodeshift codemods live in the browser — Source | Transform | Output. jscodeshift bundled via Vite, runs fully client-side.
TypeScript · Next.js · Monaco Editor · jscodeshift
🚩 New
openfeature-devtools
Chrome DevTools extension for debugging OpenFeature feature flags in real time — live evaluation log with values, variants, reasons, and timestamps.
TypeScript · Chrome MV3 · React 18 · Vite
📚 Live ↗
frontend-learning-kit-v2
The definitive roadmap for frontend platform engineers — 6 in-depth guides on platform engineering, design systems, micro-frontends, DX, AI tooling, and more.
Next.js 15 · MDX · Tailwind CSS · Vercel
Contact

Let's Build
Something Great

Open to Senior / Staff / Principal Engineer roles, technical collaborations, architecture consulting, and engineering talks. If you're building something interesting — reach out.

Open to opportunities — Bengaluru & Remote
✉️
Email
rahulkumar271@gmail.com
 📞
Phone
+91-9020220190
 💼
LinkedIn
linkedin.com/in/rahulkumar-ddev
 🐙
GitHub
github.com/RahulTinku
 🧩
LeetCode
leetcode.com/rahulkumar271
 🎯
Mentorship
topmate.io/rahul_kumar_ddev