Vivek Kumar

Senior Frontend Engineer with 5+ years of experience delivering production-grade React, TypeScript, and Next.js applications across fintech, SaaS, and enterprise environments. Proven expertise in performance engineering, micro-frontend architecture, scalable design systems, accessibility (WCAG 2.1 AA), and agile delivery. Key achievements include a 40x page-load improvement via Webpack bundle analysis and code-splitting, lifting Lighthouse scores to 90+ and Core Web Vitals to production-ready thresholds; a Module Federation micro-frontend framework reducing release contention by 70%; a 40,000-line JavaScript-to-TypeScript migration cutting runtime errors by 80%; and 78% test coverage (Jest, React Testing Library, Playwright) built from scratch.

Seeking high-impact Senior or Lead Frontend Engineer roles at product-first companies where performance and architectural decisions directly shape user outcomes.

Senior Frontend Engineer - Accenture - Gurugram, India

(2026-03)

Contributing to enterprise-scale React and Next.js applications for a client engagement; applying performance optimisation, component architecture best practices, and accessibility standards (WCAG 2.1 AA) to production codebases.

Implementing Module

Federation-based micro-frontend architecture across an enterprise application, enabling independent team deployments and reducing cross-team release dependencies for a large-scale client project. Establishing and enforcing TypeScript coding standards, reusable component patterns, Scrum ceremonies, state management best practices, and CI/CD pipeline integration; mentoring junior engineers on frontend architecture.

• React/Next.js client delivery: Contributing to enterprise-scale React and Next.js applications for a client engagement; applying performance optimisation, component architecture best practices, and accessibility standards (WCAG 2.1 AA) to production codebases.
• Micro-frontend architecture: Implementing Module Federation-based micro-frontend architecture across an enterprise application, enabling independent team deployments and reducing cross-team release dependencies for a large-scale client project.
• Frontend standards & mentoring: Establishing and enforcing TypeScript coding standards, reusable component patterns, Scrum ceremonies, state management best practices, and CI/CD pipeline integration; mentoring junior engineers on frontend architecture.

Senior Frontend Engineer - Satin CreditCare Network - Gurugram, India

(2024-08 - 2026-02)

Listed fintech NBFC with 12,000+ employees and loan portfolio of 10,000+ Cr. Diagnosed critical bundle bloat via Webpack bundle analysis; applied code-splitting, lazy loading, and targeted memoization – slashing page-load time by 40x across core financial-servicing modules and elevating Core Web Vitals to production-ready thresholds. Designed a real-time analytics dashboard aggregating KPIs across loan portfolios, disbursements, and collections; introduced Redux Toolkit and TanStack Query with client-side caching and optimistic updates – reducing API over-fetching by 60% and maintaining responsive UI on 2G networks.

Built a shared UI component library (forms, tables, modals, dropdowns) adopted across 4 product squads, compressing feature-release cycles by 25–30% and eliminating approximately 8,000 lines of duplicated code. Architected a statutory gratuity-calculation module for 12,000+ employee records with automated payout workflows – reducing HR processing time by 65%; rebuilt a 12-step legacy onboarding flow into a validation-driven React wizard, cutting completion time by 50% and support tickets by 70%. Delivered WCAG 2.1 AA compliance (ARIA, keyboard navigation, focus manageme

• Performance engineering – 40x improvement: Diagnosed critical bundle bloat via Webpack bundle analysis; applied code-splitting, lazy loading, and targeted memoization – slashing page-load time by 40x across core financial-servicing modules and elevating Core Web Vitals to production-ready thresholds.
• React and TypeScript architecture: Designed a real-time analytics dashboard aggregating KPIs across loan portfolios, disbursements, and collections; introduced Redux Toolkit and TanStack Query with client-side caching and optimistic updates – reducing API over-fetching by 60% and maintaining responsive UI on 2G networks.
• Design system and component library: Built a shared UI component library (forms, tables, modals, dropdowns) adopted across 4 product squads, compressing feature-release cycles by 25–30% and eliminating approximately 8,000 lines of duplicated code.
• End-to-end feature ownership: Architected a statutory gratuity-calculation module for 12,000+ employee records with automated payout workflows – reducing HR processing time by 65%; rebuilt a 12-step legacy onboarding flow into a validation-driven React wizard, cutting completion time by 50% and support tickets by 70%.
• Accessibility and testing: Delivered WCAG 2.1 AA compliance (ARIA, keyboard navigation, focus management) across 15+ core modules, unblocking an enterprise compliance requirement; achieved 78% test coverage (Jest, React Testing Library, Playwright) across unit, integration, and E2E suites.
• Mobile and internationalisation: Shipped React Native modules with dynamic theming and i18n supporting 3 languages across 6 device form-factors, expanding the product's addressable market.
• Agile delivery and leadership: Led daily stand-ups, sprint planning, and code reviews with PM, UX, 3 backend engineers, and QA; shipped features with zero scope-creep escalations across 8 consecutive sprints.

Frontend Developer - Kai-T - Gurugram, India

(2023-04 - 2024-07)

B2B SaaS product startup with 50-person team. Designed and delivered a Module Federation micro-frontend framework enabling 3 independent teams to deploy in parallel – reducing release contention by 70% and compressing time-to-production from days to hours. Led full-codebase migration from JavaScript to TypeScript, cutting runtime type errors by 80% and reducing new-engineer onboarding time from 2 weeks to 4 days.

Profiled bottlenecks using Lighthouse and React DevTools; applied code-splitting and memoization – lifting Lighthouse scores from mid-60s to 90+ across 3 product areas.

Built

GitLab CI/CD pipelines with automated test gates, compressing release turnaround from 3+ days to under 2 hours and eliminating all manual deployment errors. Authored shared utility and component libraries used by 2 product teams; led code reviews and established frontend coding standards, saving 4–6 engineering hours per sprint.

• Micro-frontend architecture: Designed and delivered a Module Federation micro-frontend framework enabling 3 independent teams to deploy in parallel – reducing release contention by 70% and compressing time-to-production from days to hours.
• JavaScript to TypeScript migration (40,000+ lines): Led full-codebase migration from JavaScript to TypeScript, cutting runtime type errors by 80% and reducing new-engineer onboarding time from 2 weeks to 4 days.
• Lighthouse 90+ performance optimisation: Profiled bottlenecks using Lighthouse and React DevTools; applied code-splitting and memoization – lifting Lighthouse scores from mid-60s to 90+ across 3 product areas.
• CI/CD pipeline automation: Built GitLab CI/CD pipelines with automated test gates, compressing release turnaround from 3+ days to under 2 hours and eliminating all manual deployment errors.
• Component libraries and code reviews: Authored shared utility and component libraries used by 2 product teams; led code reviews and established frontend coding standards, saving 4–6 engineering hours per sprint.

Associate Software Developer - OpenSense Labs - New Delhi, India

(2021-07 - 2023-01)

Digital experience and CMS consultancy in the Drupal ecosystem. Engineered a zero-dependency Vanilla JavaScript module rendering target websites inside a sandboxed iframe with real-time DOM injection; integrated an embedded Monaco Editor for in-browser HTML, CSS, and JavaScript authoring – reducing campaign turnaround by 60%. Delivered a React-based drag-and-drop page builder enabling content teams to publish pages without engineering support – eliminating a 3-day developer bottleneck per content cycle.

Built 6 configurable analytics dashboards (Recharts, Chart.js) adopted by 3 business units, reducing analyst-to-insight time by 50%. Refactored fragmented UI into reusable component layers, reducing code duplication by 35%; mentored 2 junior developers – both promoted to mid-level within 12 months.

• Live content personalisation engine: Engineered a zero-dependency Vanilla JavaScript module rendering target websites inside a sandboxed iframe with real-time DOM injection; integrated an embedded Monaco Editor for in-browser HTML, CSS, and JavaScript authoring – reducing campaign turnaround by 60%.
• Drag-and-drop page builder: Delivered a React-based drag-and-drop page builder enabling content teams to publish pages without engineering support – eliminating a 3-day developer bottleneck per content cycle.
• Data visualisation dashboards: Built 6 configurable analytics dashboards (Recharts, Chart.js) adopted by 3 business units, reducing analyst-to-insight time by 50%.
• Mentorship and architecture: Refactored fragmented UI into reusable component layers, reducing code duplication by 35%; mentored 2 junior developers – both promoted to mid-level within 12 months.

Software Developer - Arnowa Pvt Ltd - New Delhi, India

(2020-09 - 2021-03)

• Resolved memory leaks and re-render loops in 4 chart-heavy dashboard components (BizCharts, ApexCharts) – eliminating frame-drop incidents from weekly occurrences to zero over 3 months.
• Decomposed an 8,000-line monolithic UI into 14 feature-scoped components, enabling independent testing and parallel development.

Frontend Developer - Beeu Tech - Kolkata, India

(2020-04 - 2020-08)

• Built responsive, cross-browser UI flows for a customer-facing fintech application; A/B testing and iterative feedback loops measurably improved form-completion rates.

Bachelor of Engineering - Computer Science - Panjab University (2015 - 2019)