Nandan Joshi (JOSHI NR)
Engineering Manager
Bengaluru
Summary
Engineering leader with 10+ years of experience building POS payment application, across Android, linux and embedded platforms. Proven track record in leading teams, delivering high-performance applications, and ensuring compliance (P2PE, EMV) across global markets. Expert in C/C++, Android, CI/CD, billling and payment integrations (UPI, Visa, Mastercard) with a focus on quality, performance, and reliability.
Overview
10
10
years of professional experience
Work History
Engineering Manager/Staff Software Engineer
Razorpay Software Pvt Ltd
04.2023 - Current
- Drove product planning and OKR execution across multiple PODs, improving delivery velocity from 60% to 74%.
- Provided technical leadership through architecture reviews, design support, and team unblocking.
- Designed core frontend features, represented engineering in cross-functional organizational discussions, and managed end-to-end team operations (hiring, mentoring, and performance).
- Rewrote the Web based Android POS application from scratch, leading native development and compliance.
- Designed and developed billing system integration (wireless/wired) to the POS.
- Built an update framework (app, web, config) that cut release time from 2 weeks to 2 days.
- Designed a CI-CD pipeline with GitHub Actions, streamlining deployments and reducing manual effort.
Principal Software Engineer
Ezetap Mobile Solution Pvt Ltd
04.2022 - 03.2023
- Redesigned the UPI module in the Android Payments app, improving performance by 35% and success rate by 28%.
- Led EzeGro, a native Android e-commerce app, owning both frontend and backend, and built the core architecture using the MVVM pattern.
- Handled P2PE compliance and certification across POS devices (Android, Linux, custom OS).
- Built a custom unit testing framework with card simulation and API mocking, helping to catch 10–15% more issues pre-release.
Senior Software Engineer
Ezetap Mobile Solutions Pvt Ltd
10.2020 - 03.2022
- Rewrote the Payments app from C to modern C++ for Linux POS devices, improving maintainability and performance, with zero incident calls post-launch.
- Developed a robust OTA update mechanism, enabling faster and more reliable software delivery.
- Integrated the D180 card reader with the Android Payments app, supporting secure cross-platform transactions.
- Built a CI-CD pipeline with Jenkins, cutting release time from 2 days to under 2 hours.
- Designed and launched the Push2Pay module (Linux/Android), deployed in Dubai with zero crashes and high-quality, stable releases.
Software Engineer
Ezetap Mobile Solution Pvt Ltd
06.2018 - 09.2020
- Improved battery life 5x (from 9 to 49 hours) by implementing sleep mode optimization.
- Integrated Cppcheck and fixed memory leaks, eliminating 5–10 critical P0 issues.
- Added support for major card networks (Visa, Mastercard, Amex) and custom wallets like Airtel Money and Paytm.
- Worked with the certification team to resolve compliance issues across devices.
- Built EMI modules for both banks and NBFCs, enabling flexible financing options on payment devices.
Software Engineer
Girmiti Software Pvt Ltd
02.2016 - 06.2018
- Developed Softpay payment apps for Verifone Vx675 and Vx520 terminals with GPRS, dial-up, and Ethernet connectivity.
- Built a custom EMV L2 kernel for Visa and Mastercard chip cards, handling raw data, authentication, and security flows.
- Delivered bank-specific integrations:
- HDFC (Base24), Axis (Atos/Worldline), SBI (Hitachi).
- Led full development of core payment features: Sale, Refund, Void, Summary, EMI, DCC, and Settlement.
- Integrated directly with bank switches to ensure using ISO8583 protocol which is secure and compliant transaction processing on POS devices.
Education
Bachelor of Engineering - Computer Science
Channabasaveshwara Institue of Technology
Tumkur 04.2001 -
Skills
Problem Solver
Performance optimizer
C/C
Android
Kotlin
ISO8583
Github Actions/Jenkins
Scripting(With Python basics)
Go(basics)
Javascript(basics)
Design evaluations
Budgeting & estimating
Makefile/Gradle
Accomplishments
- Winner of "Knew", a state-level technical symposium held across multiple colleges.
- Recognized as a Promising Engineer at Girmiti Software Pvt. Ltd. for outstanding technical contributions.
- Winner of Hackathon 2019 at Ezetap Mobile Solutions Pvt. Ltd., demonstrating innovation and problem-solving excellence.
- Consecutive top rated employee for five years at Ezetap Mobile solutions Pvt ltd.
- Honored with the Mentorship Award as an Engineering Manager at Razorpay during All Hands Connect.
Hobbies
Flute
Badmiton
Movies
Timeline
Engineering Manager/Staff Software Engineer
Razorpay Software Pvt Ltd
04.2023 - Current
Principal Software Engineer
Ezetap Mobile Solution Pvt Ltd
04.2022 - 03.2023
Senior Software Engineer
Ezetap Mobile Solutions Pvt Ltd
10.2020 - 03.2022
Software Engineer
Ezetap Mobile Solution Pvt Ltd
06.2018 - 09.2020
Software Engineer
Girmiti Software Pvt Ltd
02.2016 - 06.2018
Bachelor of Engineering - Computer Science
Channabasaveshwara Institue of Technology
04.2001 -
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