Devraj Singh

Frontend Engineer

4+ yrs exp 88 · Excellent

About

Frontend Engineer with 4+ years of experience building enterprise ReactJs, NextJs and TypeScript applications across Retail Media and GIS products. Experienced in complex workflows, data-heavy dashboards, interactive mapping, REST APIs, and frontend performance optimization. Strong focus on reusable architecture, product ownership, and building scalable user experiences.

Skills & Expertise (24)

ReactJS Advanced

8.3/10

Years Exp

Typescript Advanced

8.0/10

Years Exp

OpenLayers Intermediate

6.5/10

Years Exp

Git Intermediate

6.5/10

Years Exp

NextJS Intermediate

6.0/10

Years Exp

REDUX Intermediate

6.0/10

Years Exp

Material UI Intermediate

6.0/10

Years Exp

REST APIs Intermediate

6.0/10

Years Exp

Axios Intermediate

6.0/10

Years Exp

React Query Intermediate

6.0/10

Years Exp

Figma Intermediate

6.0/10

Years Exp

Jira Intermediate

6.0/10

Years Exp

Tailwind CSS Intermediate

5.5/10

Years Exp

GitHub Actions Intermediate

5.0/10

Years Exp

Material React Table Intermediate

5.0/10

Years Exp

Recharts Intermediate

5.0/10

Years Exp

I18n Intermediate

5.0/10

Years Exp

Playwright Intermediate

4.5/10

Years Exp

Jest Intermediate

4.5/10

Years Exp

Cypress Intermediate

4.5/10

Years Exp

React Testing Library Intermediate

4.5/10

Years Exp

Claude Code Beginner

3.0/10

Cursor Beginner

3.0/10

Javascript (ES6+

Work Experience

Frontend Developer

Pentaleap

May 2024 - Present

Led frontend development of “Buy-out Ad Campaigns” in ReactJs & TypeScript, automating workflows previously done manually for Home Depot and Staples; directly enabled new revenue streams and high client adoption. Spearheaded Ad Approval workflows, ensuring retailer brand compliance and unlocking multi-million dollar partnerships with Home Depot, CVS, and ICA. Owned development of Publisher Manager Dashboard & advanced reporting, using ReactJs, Recharts, React Query, and Material-UI to provide real-time insights and significantly reduce reporting turnaround for enterprise clients (CVS, Macy’s, Staples). Owned frontend development of Placement Targeting, enabling Admin and Ad Ops users to target individual ad units with role-based controls, validation, and backward-compatible targeting workflows for enterprise retailers including Home Depot, B&H Photo, and DocMorris.

Frontend Developer

Ottermap

Sep 2022 - May 2024

Designed interactive mapping features with React.js, OpenLayers, Google Maps API, enabling property measurement and order placements, which boosted engagement by 25%. Enhanced UX by iterating based on user feedback, leading to higher retention and positive client reviews.