Siddharth Sen

IOS Engineer

South Delhi, Delhi, India6 yrs 11 mos experience
AI EnabledAI ML Practitioner

Key Highlights

  • Improved app performance by 50% at FamPay.
  • Mentored new developers, enhancing team capabilities.
  • Developed user-centric features for PayPay iOS app.
Stackforce AI infers this person is a Fintech-focused iOS Developer with strong leadership and technical skills.

Contact

Skills

Core Skills

Ios DevelopmentSoftware ArchitectureTeam LeadershipTechnical Design

Other Skills

C++SwiftMachine LearningObjective-CObject-Oriented Programming (OOP)CommunicationiOSMobile Application DevelopmentObject Oriented DesignJavaAndroid DevelopmentGame DevelopmentWeb ServicesAlgorithmsData Structures

About

At PayPay India, as an iOS Software Engineer - 2, I contribute to enhancing the PayPay iOS application by developing features that prioritize user-centric design and robust performance. With expertise in Objective-C, Swift, and software architecture, I work on resolving framework-related challenges, improving app modularity, and optimizing performance. My contributions aim to align with organizational goals while ensuring a seamless and secure user experience. Previously at FamPay, I played a pivotal role in implementing key app features such as QR Theme editor and Aadhaar KYC integration, while mentoring team members and addressing multifaceted technical issues. By focusing on scalable solutions, I enabled app performance improvements and streamlined mobile development processes. Passionate about innovation, I consistently aim to deliver impactful mobile experiences.

Experience

6 yrs 11 mos
Total Experience
1 yr 2 mos
Average Tenure
1 yr 1 mo
Current Experience

Paypay india

iOS Software Engineer - 2

May 2025Present · 1 yr 1 mo · Gurugram, Haryana, India · On-site

  • Working on the PayPay iOS application.
C++SwiftiOS DevelopmentMachine LearningSoftware ArchitectureObjective-C

Fam

3 roles

Software Engineer - 2

Aug 2023May 2025 · 1 yr 9 mos

Team LeadershipObject-Oriented Programming (OOP)CommunicationiOSTechnical DesignMobile Application Development+1

iOS Software Engineer

Jul 2022May 2025 · 2 yrs 10 mos

  • Implemented new features on the app such as QR Theme editor, complex UI payment flows, Digio Aadaar KYC, server driven dynamic home cards.
  • Worked on many of the bugs related to SwiftUI/UIKit
  • Mentored new mobile developers on to the team and helped with all their doubts and nitty gritty's of the code base.
  • Improved the app performance by 50% since inception, and also worked on making the code base more modular.
  • Worked on all new features/changes required on the app by NPCI
  • Worked on improving payments via RazorPay SDK
  • Worked with Introspect, SwiftUIX, UIKit, Objective C, Firebase version related issues by going in depth of the frameworks.
  • Was the go to person for the entire mobile team, regarding may of the issues and decision making.
Object Oriented DesignCommunicationiOS DevelopmentTechnical Design

Software Engineer Internship

Oct 2021Jun 2022 · 8 mos

  • India’s first numberless card and payments app for teenagers and their families.
  • We are growing fast with 3M+ users and are lucky to have received a massive series A funding of $38M+
  • Working on FamPay iOS Application.
Object Oriented DesignCommunicationiOSiOS DevelopmentTechnical Design

Google summer of code

Summer of Code Student

Apr 2020Aug 2020 · 4 mos

  • Built Calendar framework
  • Optimized the app to remove memory leaks.
  • Refactored the app to be more reliable and MVC friendly. Also testing out other design
  • patterns such as VIPER, Clean Swift VIP, MVVC, etc.
  • Responsible for developing new features, from back-end logic to UI/UX.
  • Native iOS application for the Agora Web application.
  • Conduct democratic elections using multiple algorithms.
  • Technical: Graphql, Objective-C, Facebook SDK, SwiftUI + UIKit, MVVM, MVC, Realm NoSQL databases + Unit Tests
Object Oriented DesigniOS DevelopmentTechnical Design

Cypherock

Mobile Engineer

Jan 2020Mar 2020 · 2 mos · New Delhi, Delhi

  • Used cryptographic libraries to read/write seed in Java cards through the mobile app.
  • Generate seed phrase from user mnemonic or generated 12-24 word mnemonic.
  • Led the mobile team and helped with the product webpage which drove over 1000 in sales
  • Used a new Apple NFC library without any help on how to use and interact with the custom java cards.
  • Gained experience using Swift, Java, Javascript, HTML/CSS, and Bootstrap while utilizing various Google Cloud Platform APIs, including App Engine and Datastore.
Object Oriented DesignCommunicationiOS DevelopmentTechnical Design

Maharaja surajmal institute of technology

Undergraduate Student Researcher

Oct 2019Feb 2020 · 4 mos · New Delhi Area, India

  • Research on IoT exploits and using Machine Learning to detect security flaws in IoT devices.
Object Oriented Design

Harvard university

"Most Mainstream Hack" in HackHarvard

Oct 2019Oct 2019 · 0 mo · Greater Boston Area

  • “Healthy.Ly”, Android app that uses Artificial Intelligence and Machine Learning to detect if a
  • particular food is allergic to you.
  • “Healthy.Ly” is an android app that uses Artificial Intelligence and Machine Learning to detect if a given food is allergic to you. It can also show you the nutritional values, its recipe and syncs with your Google FIT to show you the net amount of calories consumed vs. burnt.
  • We developed a deep learning model using Tensorflow that can classify between 101 different food items. We trained it using the Google Compute Engine with 2vCPUs, 7.5 GB RAM and 2 Tesla K80 GPU. This model can classify 101 food items with over 70% accuracy.
  • Our team was awarded in the category of "Most Mainstream Hack”
Object Oriented DesignTechnical Design

Fossasia

Mobile Engineer

Sep 2019Feb 2020 · 5 mos · Remote

Object Oriented DesignTechnical Design

Godot engine

Open Source Developer

Jan 2019Sep 2019 · 8 mos

  • Diagnosed issues with GUI, rendering, increased productivity by 10% fixing the search & replace the functionality of the game engine editor.
Object Oriented DesignTechnical Design

Bluebells school international

Programming Head of Annual School Event ENIAC

Oct 2017Dec 2017 · 2 mos · New Delhi Area, India

Object Oriented Design

Utsav-2017

UTSAV-2017 C++ Programming Competition

Jul 2017Jul 2017 · 0 mo · New Delhi Area, India

Instructables

Published Project on Raspberry Pi

Apr 2017May 2017 · 1 mo

  • Produced a device to measure CO2, NO, NO2, CO and PM2.5 levels in the local atmosphere around the device using several gas sensors and PM2.5 Sensor data was processed with a RaspberryPi to print corresponding levels on an LCD screen included an inbuilt fan to circulate air in the device.

Google

Google Web Ranger

Aug 2016Aug 2017 · 1 yr · New Delhi Area, India

Cardiff university / prifysgol caerdydd

Engineering Competition

Jul 2016Jul 2016 · 0 mo · New Delhi Area, India

Instructables

Published Project on Arduino

Jul 2016Jul 2016 · 0 mo

  • Converted resistance offered by soil and converting the analog to a digital signal with Arduino using the information to display moisture content of the soil on an inbuilt LCD screen which can also be calibrated.

Unity technologies

Participant in Online GameJam

May 2016Jul 2016 · 2 mos

Self-employed

Visual Basic Developer

Jan 2014Jan 2015 · 1 yr

  • Worked on personal Visual Basic projects
  • Web Browser
  • CD key generators
  • Cheat Engines

Education

Guru Gobind Singh Indraprastha University

Bachelor's degree — Computer Science

Aug 2018Aug 2022

Maharaja Surajmal Institute Of Technology

Bachelor's degree — Computer Science Engineering

Jan 2018Jan 2022

Bluebells School International Kailash Colony, New Delhi, India

Jan 2006Jan 2018

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