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Sagar Tanwar

Lead Software Engineer @ Tata 1mg | 🤩 JavaScript Enthusiast | ❤️ ReactJS

Delhi

9+ years of work experience

Tata 1mg
Apr 20251 yr 3 mosPresent

Tata 1mg
Oct 20222 yrs 6 mosMar 2025

Payment Flow Migration & UPI Intent: Led complete migration of mWeb/dWeb payment flows; integrated UPI Intent → achieved 57% adoption within 2 weeks, improved UX, and reduced MDR costs. Dopamine 2.0: Owned rollout of the Dopamine 2.0 design system, revamping major pages — including Home, Pharmacy, PDP, and SRP pages; delivered org-wide tech talk to drive adoption. INP Optimization: Proactively optimized INP ahead of Google’s rollout, reducing key interaction delays on Drug & OTC pages from 886 ms → 396 ms; authored an internal performance playbook. Accessibility: Took ownership of accessibility fixes, delivering scalable, standards-aligned improvements that enhanced usability for screen-reader and keyboard-only users and strengthened platform inclusivity. Early Leadership: Mentored peers, reviewed PRs, and led best practice adoption within the frontend team.
Essence Software Solutions Pvt. Ltd.
Jul 20211 yr 3 mosSep 2022

Gurugram, Haryana, India

Developed and optimized SPAs, collaborated with backend teams, and delivered UI features with strong UX focus.
AMS SOFTECH
Oct 20191 yr 9 mosJun 2021

Delhi, India

Built REST APIs and responsive layouts, laying strong foundations in scalable frontend development.
Freelance
Jun 20172 yrs 5 mosOct 2019

Remote

Built web applications and UI components for clients, delivering responsive layouts and custom features.

Education

Inderprastha Engineering College

Bachelor of Technology - BTech, Information Technology

Inderprastha Engineering College

20134 yrs2017

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Headline

Lead Software Engineer @ Tata 1mg | 🤩 JavaScript Enthusiast | ❤️ ReactJS

About

Hi, I'm Sagar Tanwar. I am a motivated full-stack developer and worked with several JavaScript frameworks, however, ReactJS is my go-to library. I'm passionate about design systems, blockchain, and everything JavaScript.

Location

Delhi

Work experience

SDE III at Tata 1mg, Apr 2025 - Present · 1 yr 3 mos

SDE II at Tata 1mg, Oct 2022 - Mar 2025 · 2 yrs 6 mos, Payment Flow Migration & UPI Intent: Led complete migration of mWeb/dWeb payment flows; integrated UPI Intent → achieved 57% adoption within 2 weeks, improved UX, and reduced MDR costs. Dopamine 2.0: Owned rollout of the Dopamine 2.0 design system, revamping major pages — including Home, Pharmacy, PDP, and SRP pages; delivered org-wide tech talk to drive adoption. INP Optimization: Proactively optimized INP ahead of Google’s rollout, reducing key interaction delays on Drug & OTC pages from 886 ms → 396 ms; authored an internal performance playbook. Accessibility: Took ownership of accessibility fixes, delivering scalable, standards-aligned improvements that enhanced usability for screen-reader and keyboard-only users and strengthened platform inclusivity. Early Leadership: Mentored peers, reviewed PRs, and led best practice adoption within the frontend team.

Software Engineer at Essence Software Solutions Pvt. Ltd., Jul 2021 - Sep 2022 · 1 yr 3 mos, Gurugram, Haryana, India, Developed and optimized SPAs, collaborated with backend teams, and delivered UI features with strong UX focus.

Full-stack Developer at AMS SOFTECH, Oct 2019 - Jun 2021 · 1 yr 9 mos, Delhi, India, Built REST APIs and responsive layouts, laying strong foundations in scalable frontend development.

Frontend Developer at Freelance, Jun 2017 - Oct 2019 · 2 yrs 5 mos, Remote, Built web applications and UI components for clients, delivering responsive layouts and custom features.

Education

Bachelor of Technology - BTech, Information Technology, Inderprastha Engineering College

Sagar Tanwar - SDE III in Delhi | Tal