Gulshan Kumar — Senior Software Engineer

Experienced iOS developer with 10+ years of experience in Swift, Data structures & Algorithms, Scala, and Objective-C. I specialize in building dynamic and scalable iOS applications, served as a Senior Technical Lead at Paytm serving over 100 Mn users and working with a team in the development of innovative features and solutions. Strong engineering professional with a Bachelor's of technology focused in Computer Engineering from J.C. Bose University of Science & Technology, YMCA, Faridabad, Haryana (formerly known as YMCAUST, Faridabad) Specialities: - 9+ years experience in iOS Development - 1+ Backend Experience in Scala language. - Good knowledge of algorithms and data structures. - Experience working with iOS frameworks UIKit, Core Data, Core Location, SwiftUI - Knowledge of Core concepts in iOS such as Optional-chaining, Offline storage, multi threading and memory management using ARC. - Experience with Design Patterns, MVC, MVVM, Viper and Riblets Architecture. - Familiar with integrating Third party libraries using cocoapods, SPM - Familiar with integrating Web services(JSON,XML etc.) - Image and video recording using iOS inbuilt Camera. - Video streaming using AVPlayer. - Integrated Apple push notifications. - Integrating Apple maps and google maps. - Integrated social login through google, linkedIn,Facebook and twitter . - Data analytics using kibana dashboards. - Integrated Crashlytics for crash reporting. - Knowledge of code version Tool e.g Git - Familiar with projects organizing and issue tracking tools like Jira, Trello and Redmine. - Working knowledge of general mobile landscape,architecture ,trends and emerging technologies. - Experience in writing unit tests for robustness, including edge cases, usability and general reliability

Stackforce AI infers this person is a Fintech and E-commerce iOS Developer with extensive experience in scalable application development.

Location: Bengaluru, Karnataka, India

Experience: 10 yrs 3 mos

Skills

Ios Development
Scalable Code Writing
Backend Development

Career Highlights

Over 10 years of experience in iOS development.
Led development for apps serving over 100 million users.
Strong expertise in scalable code and user experience enhancement.

Work Experience

Samsung Electronics

Senior Software Engineer (7 mos)

Paytm

Senior Tech Lead (6 mos)

Tech Lead (3 yrs 7 mos)

Senior Software Engineer (1 yr 1 mo)

Zilingo

Senior Software Engineer | Backend (1 yr)

iOS Developer (11 mos)

Crownit (GoldVIP)

iOS Developer (1 yr 3 mos)

Daffodil Software

iOS Developer (1 yr 4 mos)

Education

Bachelor of Technology - BTech at J.C. Bose University of Science and Technology, YMCA

at Tagore public school

Gulshan Kumar

Senior Software Engineer

Bengaluru, Karnataka, India10 yrs 3 mos experience

Highly Stable

Key Highlights

Over 10 years of experience in iOS development.
Led development for apps serving over 100 million users.
Strong expertise in scalable code and user experience enhancement.

Stackforce AI infers this person is a Fintech and E-commerce iOS Developer with extensive experience in scalable application development.

Contact

Skills

Core Skills

Ios DevelopmentScalable Code WritingBackend Development

Other Skills

AndroidArchitectureAuto LayoutCC++CSSCocoa TouchCocoaPodsCode CoverageCode ReviewCode ReviewsComputer ScienceConcurrent ProgrammingCore JavaData Structures

About

Experience

10 yrs 3 mos

Total Experience

2 yrs 5 mos

Average Tenure

7 mos

Current Experience

Samsung electronics

Senior Software Engineer

Oct 2025 – Present · 7 mos

Paytm

3 roles

Senior Tech Lead

Promoted

Apr 2025 – Oct 2025 · 6 mos

Paytm pioneered India's digital revolution, emerging as the country's leading payments app. Today, over 20 million merchants and 300 million users rely on Paytm for seamless payments, bill settlements, recharges, money transfers, and more.
Customer base 300+ Million
App Store reviews ~2.6 Million, App Store rating 4.7
● Responsibilities -> writing scalable code, doing code reviews, writing unit tests, bug fixes, architecting solutions to many problems in hand.
● app launch improvements
● Enhancing user experience by implementing features based on customer usage patterns
● Worked on features which have served over 100 Mn users, DAU > 5 million (iOS)
● Owning and maintaining many iOS sdks of Paytm.
● Involved in hiring junior iOS engineers.

iOS DevelopmentScalable Code WritingCode ReviewsUnit TestingUser Experience Enhancement

Tech Lead

Aug 2021 – Mar 2025 · 3 yrs 7 mos

Senior Software Engineer

Jul 2020 – Aug 2021 · 1 yr 1 mo

Zilingo

2 roles

Senior Software Engineer | Backend

Jul 2019 – Jul 2020 · 1 yr

Zilingo Shopping is a marketplace where you can effortlessly shop for clothing, fashion accessories, home and lifestyle products. Zilingo has more than 5 Mn downloads on Play Store and slightly less than 1 Mn downloads on App Store.
Key Responsibilities:
1. Developed Product ratings, Customer care and Address flows from scratch.
2. Re-designed Product details, Order listing, Order details and Login/Signup flow.
3. Enhanced layout system with new components which allows configuration of dynamic layouts on runtime.
4. Also, I was part of Product filters, storefronts, product listing, Payment selection and Cart flows.
5. Worked effectively with Design, Product and Business teams to elevate user side experience.
6. Wrote scalable, maintainable and extensible code in a team environment.

Backend DevelopmentProduct DevelopmentUser Experience Design

iOS Developer

Aug 2018 – Jul 2019 · 11 mos

Crownit (goldvip)

iOS Developer

May 2017 – Aug 2018 · 1 yr 3 mos · Gurgaon, India

Crownit is India’s most trusted online Market research platform & a full stack agency providing consumer insights to brands & enterprises across Industries by conducting surveys online.
CronwIt has more than 2Mn downloads on Play Store and ~0.6 Mn downloads on App Store.
1. Developed Crownit Prime flow from scratch which included some milestones that the user needed to achieve to get great rewards.
2. Developed Tambola, Flappy Bird, Word Swipe and Rapid fire like games and added these games to existing CrownIt app.
3. Re-designed Home, Restaurants listing and Cashback details flows.
4. Modified existing software to correct errors, upgrade interfaces and improve performance.

Daffodil software

iOS Developer

Jan 2016 – May 2017 · 1 yr 4 mos

Developed Mobile Application to cater Business needs.
Involved in analysing requirements given by the Product-Team & coordinated with stakeholders to develop a robust product, considering the estimates and their impacts.
Suggested new technologies & concepts to improve the health of the application.