AK

Lead Frontend Engineer · React · Next.js · TypeScript

Engineering Frontend
Systems That Scale

I lead frontend architecture for complex products, improving performance, engineering quality, and delivery.

Portrait of Abhishek Kumar
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India . Open to opportunities
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Nearly 8 years
Front-end engineering
45% lower
Initial page load time
90%+
Project test coverage

01 / Professional Case Studies

Professional Case Studies

Due to NDA restrictions, code and screenshots are not available.

Featured Case Study

Sony LIV Bolt

Schema-driven form architecture for complex product workflows.

90%

less feature-development time

Professional Work / Architecture

NDA PROTECTED

Schema-Driven Form System

Senior Software Engineer · Kellton · 2022–2024

The Problem

Forms across multiple modules duplicated business logic, slowing development and making maintenance difficult.

My Contribution

Built a schema-driven form system using React and TypeScript, extracting shared behavior for field changes, existing-data population, conditional expressions, tab visibility, and action-button states into reusable components.

Trade-offs

Centralized common form behavior while keeping module-specific API endpoints, success handlers, and specialized fields configurable.

Outcome

  • Reduced development time for similar form-based features by approximately 90%.
  • Reduced repeated form logic across multiple modules through reusable components.
  • Improved maintainability by centralizing shared behavior and simplifying future changes.

Professional Work / Product Delivery

Sony LIV Bolt

Frontend performance, architecture, and delivery with a six-person product engineering team.

45%
lower initial load
3
engineers mentored

Professional Work / Performance & Delivery

NDA PROTECTED

Frontend Performance & Delivery

Lead Engineer · Kellton · 2025–Present

The Challenge

Improve application loading performance and maintain engineering quality as the frontend and its feature set grew.

Performance Optimization

  • Reduced initial loading time by approximately 45% through React rendering optimization, code splitting, and data-fetching improvements.
  • Validated performance improvements using Google Lighthouse and manual timing.

Engineering Quality & Testing

  • Reduced SonarQube-reported code duplication from approximately 6% to as low as 2.2% through frontend refactoring.
  • Helped increase project test coverage from approximately 35% to over 90% using Jest and React Testing Library.

Technical Leadership

  • Coordinated frontend delivery within a six-person engineering team.
  • Mentored three engineers through code reviews and technical guidance.

02 / PERSONAL PROJECTS

Built in Public

Open repositories and shareable technical work.

PROFILE DISCOVERY / STATE & DATA

  • React + TS
  • Zustand

DevTinder

A social discovery interface with client state, API data, authentication, and UI tests.

View repositoryProject details

SERVERLESS FRONTEND / CLOUD INTEGRATION

  • Next.js
  • AWS Lambda

RAWG Games

A game discovery app using Next.js with AWS API Gateway and Lambda as a serverless API layer.

View repositoryProject details

03 / Technical Expertise

Technical Expertise

The systems, quality practices, and technical leadership behind the work.

Frontend Systems

  • React and Next.js
  • TypeScript & typed systems
  • Schema-driven forms
  • Reusable component architecture

Quality & Delivery

  • Performance optimization
  • Accessible UI / WCAG
  • Automated UI testing
  • CI/CD & code quality

Technical Leadership

  • Architecture decisions
  • Code review and mentorship
  • Cross-team alignment
  • Product collaboration

04 / ENGINEERING PRACTICE

Engineering Practice

Evidence from day-to-day delivery and cloud-integrated frontend work.

AI-assisted & agentic workflows

Used for implementation, code analysis, quality validation, and test generation, with human review before delivery.

10+percentage points

Primarily driven by AI-assisted testing and manual validation

Cloud-integrated frontend

Regional Next.js sites with CloudFront and Lambda@Edge, alongside a self-serve CMS.

90+ Lighthouse SEO score

Leanpitch·Nov 2018–Mar 2022

05 / CONTACT

Let's Connect

Open to Lead and Senior Frontend opportunities.

Location
India
Roles
Lead / Senior Frontend
Work
Remote · US/EU overlap

DIRECT CONTACT

Reach me directly.

abhishekkr1993@gmail.com

For roles, collaborations, or technical conversations.

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