ReactJs
ANUJ SINGH
Frontend Software Engineer
Mumbai,MH
Summary
Staff Frontend Architect with 7 years of experience architecting high-scale platform infrastructure for regulated healthcare and enterprise financial systems. Dual expertise in React (7 years) and Angular with SSR (5 years). Specializes in Server-Driven UI (SDUI) patterns, multi-tenant architecture, and translating business constraints into scalable systems. Proven track record: architected platforms powering 25+ regulated product launches with minimal code, drove $600k → $8M CAD/month revenue uplift through B2B infrastructure, and displaced $1M+ in paid acquisition through Core Web Vitals optimization.
Overview
7
7
years of professional experience
Work History
Staff Frontend Engineer
PocketPills
Gurugram
03.2021 - Current
- Architected a 3-Tier Clinical Flow Platform: Designed a config-driven multi-renderer engine and stateless Server-Driven UI (SDUI) questionnaire runtime that eliminated bespoke per-feature code. Powered 25+ regulated healthcare launches (Minor Ailments, Weight Loss, ED Renewal, B2B Signup, Guest Checkout) with reduced time-to-market from weeks to hours, all on a single unified codebase.
- Engineered B2B Multi-Tenant Architecture: Designed a white-label, config-driven platform enabling minimal code employer, brand and drug-partner onboarding. Scaled to 2,000+ employer partnerships and 6+ drug integrations (Viagra, Premarin, Eliquis, Alesse) with resilient UTM attribution surviving SPA navigation and SSO redirects. Direct business impact: $600k → $8M CAD/month revenue uplift.
- Led Organic Growth & SEO Performance Initiative: Partnered with Quattr to optimize frontend SEO, SSR rendering, critical rendering path, and page experience. Elevated platform performance grade from E → A on standard benchmarks. Built in-house blog platform with Scalenut integration for AI-assisted content generation. Business outcome: 130% organic activation growth (157 → 361/month); outranked enterprise competitors; displaced $1M+ in annualized paid search spend.
- Executed SSR-to-CSR Architectural Split: Decoupled monolithic Angular Universal infrastructure into SEO-critical SSR surfaces (landing pages, blog, drug pages) and fully independent CSR applications (member dashboard, signup). Eliminated Node.js as a single point of failure, creating independent failure domains for ~60% of the platform and removing per-user SSR latency overhead.
- Built an AI-Native Codebase for LLM Efficiency: Led zero-downtime Angular v15 → v17 migration, enforcing strict TypeScript, standalone components, modern control flow (@if/@for/@switch), and canonical folder structure. Reduced codebase ambiguity to unlock AI copilot effectiveness. Business outcome: ~70% reduction in AI-generated code rejection rate; Day-1 junior engineer productivity.
- Designed Scalable E-Commerce & Payment Infrastructure: Built a unified cart/checkout with vertical-specific adapters supporting four distinct commerce models (partner-integrated, bundled SKUs, fast-launch COVID kits, subscription/auto-refill). Implemented atomic fulfillment for composite products, coupon engine lifecycle logic, and EDD projections for recurring orders.
- Hardened Enterprise Security & Compliance: Remediated critical SOC2 penetration test findings (like CSRF, XSS, missing SRI, loose cookie scoping). Enforced strict Content Security Policy (CSP), HTTP-only authentication cookies, and PII anonymization layer. Achieved SOC2 Type 2 Certificate; survived multiple SOC2 audit cycles with minimal critical frontend findings.
- Optimized Observability & Cost Efficiency: Executed 2-pass Mixpanel event volume optimization strategy: diagnosed 7M actual vs. 4M contracted monthly events. Reduced volume by 43% while preserving full analytics fidelity through event taxonomy governance. Prevented SaaS contract overage. Implemented distributed tracing and CloudWatch dashboards for root-cause error identification, replacing instance-level symptom patching.
- Automated WCAG 2.2 Accessibility Compliance: Led full-webapp accessibility audit for Canadian WCAG 2.2 AA+ compliance. Abstracted ARIA roles, focus management, and keyboard navigation into 'Accessible-by-Default' component library. Integrated accessibility testing into CI/CD pipeline.
- Enforced Codebase Quality Standards: Brought legacy codebase from ~0% to 100% ESLint compliance through 50+ incremental tickets over 6 months. Made linting a permanent CI gate. Established unit testing culture (0% → 67% coverage) using AI-augmented test authoring. Code style permanently removed from PR review concerns.
- Led Technical Leadership: Mentored Senior engineers toward Staff promotion through code review and architectural decision-making. Owned frontend on-call L2 rotation. Authored RCAs and design documents influencing product roadmap. Active in cross-functional design reviews with product, security, and compliance stakeholders.
- Canada's leading online pharmacy. Progressive promotion: SDE → SDE II → Principal/Staff.
Software Engineer (Frontend)
EPAM Systems
Hyderabad
07.2019 - 02.2021
- Schema-Driven UIs: Implemented frontend UI flows for House View and Market Insights (HVMI) using an existing JSON-driven architecture, enabling rapid rendering of permission-based content and approval workflows.
- Implemented Virtualized Data Grids: Developed a windowing component to handle 10,000+ rows of live financial data without main-thread blocking, improving the performance of internal dashboards.
- Developed Financial Dashboards: Built React and D3.js UI components for the Stock Reports Plus (SRPLUS) product, translating complex securities data (earnings, relative valuation, risk) into interactive graphs and tables for analysts.
- Extended Platform Localization: Added internationalization support to new financial reporting modules, ensuring complex financial tables rendered correctly across global languages.
- Built Internal Tooling: Developed a full-stack project management application (Kanban2020) from scratch using React, Redux, Node.js, and MongoDB to support internal workflow management.
- Global software engineering firm. Worked on Refinitiv (LSEG) enterprise financial products.
Education
B.E. - Computer Engineering
Vidyavardhini's College of Engineering & Technology
01.2019
Skills
- React
- Angular
- TypeScript
- JavaScript
- Server-Driven UI
- Config-Driven Multi-Renderer
- Stateful Hybrid Navigation
- Vertical Adapter Pattern
- Micro-frontends
- SSR/CSR Decoupling
- Core Web Vitals
- Critical Rendering Path
- Bundle Optimization
- Media Delivery
- Virtualization
- Hydration Strategies
- Mixpanel
- Sentry
- CloudWatch
- AWS
- CI/CD
- Redis Caching
- Content Security Policy
- Anti-CSRF
- XSS Prevention
- HTTP-Only Cookies
- PII Anonymization
- SOC2 Co-Ownership
- Pentest Remediation
- WCAG 22 AA
Websites
Personal Information
- Status: Open to Staff Engineer, Principal Engineer, or Lead Engineer roles
- Title: Staff Software Engineer | Frontend Platform Architecture
- Availability: Open to Staff Engineer, Principal Engineer, or Lead Engineer roles
Core Competencies
React (Fiber, Hooks, Context, Redux Toolkit, React Query), Angular (Ivy, Signals, Zoneless, SSR/Angular Universal), TypeScript (Strict Mode, Discriminated Unions), JavaScript, Server-Driven UI (SDUI), Config-Driven Multi-Renderer, Stateful Hybrid Navigation, Vertical Adapter Pattern, Micro-frontends, SSR/CSR Decoupling, Core Web Vitals (LCP, INP, CLS), Critical Rendering Path, Bundle Optimization, Media Delivery, Virtualization (Windowing), Hydration Strategies, Mixpanel, Sentry, CloudWatch, AWS (S3), CI/CD (Jenkins), Redis Caching, Content Security Policy (CSP), Anti-CSRF, XSS Prevention, HTTP-Only Cookies, PII Anonymization, SOC2 Co-Ownership, Pentest Remediation, WCAG 2.2 AA+ Accessibility
Key Achievements Business Impact
- 3-Tier Clinical Flow Platform, 25+ product launches, weeks → hours TTM
- B2B Multi-Tenant Infrastructure, $600k → $8M CAD/month revenue uplift
- Organic Growth & SEO Initiative, 130% activation growth; $1M+ paid ad displacement
- Performance Optimization, E → A grade; 40% LCP improvement
- AI-Native Codebase Refactor, 70% reduction in AI code rejection
- Security Hardening, SOC2 Type2 Compliant
- Observability Optimization, 43% Mixpanel cost reduction; prevented contract overage
- Codebase Quality, 0% → 67% test coverage; 100% lint compliance
- Framework Migration, Zero-downtime Angular v15 → v17 upgrade
- Accessibility Audit, Full WCAG 2.2 AA+ compliance, CI-integrated
Software
Angular
Typescript
HTML and CSS
Interests
Building scalable frontend systems
Quote
Design is not just what it looks like and feels like. Design is how it works.
Steve Jobs
Timeline
Staff Frontend Engineer
PocketPills
03.2021 - Current
Software Engineer (Frontend)
EPAM Systems
07.2019 - 02.2021
B.E. - Computer Engineering
Vidyavardhini's College of Engineering & Technology