About me

With over a decade in mobile engineering, I’ve grown from shipping my first iOS app to leading teams that build products used by hundreds of thousands of people. I’m Janarthanan Kannan — a Tech Lead & Mobile Engineer who believes great apps are built at the intersection of clean code, smart architecture, and a relentless focus on user experience.

I’ve designed, built, and shipped 25+ iOS and Android applications across fintech, e-commerce, automotive, and lifestyle — collectively earning 100K+ downloads and multiple App Store features. My craft spans Swift, SwiftUI, UIKit, and Kotlin, grounded in scalable architecture patterns like MVC and MVVM, with a constant eye on performance and long-term maintainability.

As a tech lead, I do more than write code — I align technical decisions with business goals, mentor engineers, and drive Agile delivery across cross-functional teams. I take as much pride in building strong teams as I do in building great products.

Outside of work, I’m exploring emerging mobile technologies, contributing to side projects, and mentoring the next generation of mobile developers — because the best ideas often surface when curiosity leads the way.

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What I'm Doing

  • mobile app icon

    Mobile apps

    Native iOS and Android app development using Swift, SwiftUI, Kotlin, and modern architectures.

  • design icon

    Web Design

    Responsive, accessible web interfaces built with modern front-end technologies and clean design principles.

  • web development icon

    Web Development

    Full-stack web applications with scalable backends, RESTful APIs, and e-commerce platforms using modern frameworks.

  • project management icon

    Technical Leadership

    Leading cross-functional teams, driving Agile delivery, mentoring developers, and aligning technical strategy with business goals.

Testimonials

  • Marc Vucovich

    Marc Vucovich

    Janarthanan is a highly skilled iOS developer with a keen eye for detail. His ability to translate complex requirements into seamless, user-friendly apps is outstanding. He consistently delivers high-quality code and ensures projects are completed on time. A true asset to any development team.

  • Mohan Subramaniam

    Mohan Subramaniam

    Working with Janarthanan has been an outstanding experience. He brings deep expertise in app and website development, with strong command over Swift, iOS frameworks, and modern web technologies. As a leader of a 20-member team, he consistently drives high performance by setting clear direction, mentoring developers, and ensuring quality delivery. Proactive and solutions-driven, he goes beyond expectations to enhance user experience while fostering a collaborative and dependable work environment.

  • Sharad Agarwal

    Sharad Agarwal

    Janarthanan excels as both an individual contributor and a team lead in mobile and web app development projects. He has successfully delivered end-to-end applications as a solo performer—taking them from concept to user deployment and providing ongoing support. As a team leader, he drives performance through clean architecture, optimization, and strong technical direction. His combination of technical expertise, creativity, and clear communication makes him a highly effective partner across cross-functional teams.

  • Naveen Kumar

    Naveen Kumar

    Janarthanan is not only a talented iOS engineer but also someone who deeply cares about the products he builds. His attention to UI/UX details and ability to anticipate user needs result in apps that feel polished and intuitive. I would strongly recommend him for any mobile development role.

Clients

  • Cognetik Labs logo
  • OJA logo
  • Citroen logo
  • Beezer Golf logo
  • New India Bazar logo
  • Q PaymentZ logo

Resume

Education

  1. Bachelor of Computer Science

    Jul 2008 — Jun 2011

    Yadava College, Madurai Kamraj University Board, Madurai, Tamil Nadu.
    Studied core computing principles, data structures, software engineering, and systems programming — the foundation of a 12+ year career in mobile and software development.

Experience

  1. Sr. iOS Developer | Cognetik Labs Inc, USA

    Jun 2024 — Present
    • Built reusable UI components improving user engagement by 25%.
    • Integrated third-party APIs to enhance functionality and performance.
    • Mentored junior developers and enforced clean coding practices.
  2. Lead Mobile Engineer | Doodleblue Innovations Pvt Ltd. Chennai, India.

    Aug 2021 — Jun 2024
    • Designed and implemented scalable e-commerce app architecture (Store2K).
    • Improved Agile delivery cycles, increasing team efficiency by 25%.
    • Enhanced app quality and reduced bugs via code reviews and CI/CD adoption.
  3. Tech Lead – iOS Apps | MAS Payments Inc. USA

    Nov 2018 — Jul 2021
    • Directed development of fintech apps; reduced deployment times by 20%.
    • Optimized app performance, improving load speeds and user satisfaction.
    • Led a 5-member iOS team, 2-member UI/UX team & 4-member Backend Development team, aligning product features with business goals.
  4. Lead Mobile Developer | Shaan Deals Intl. Dubai, UAE

    Nov 2017 — Oct 2018
    • Independently architected and delivered iOS & Android apps from concept to release.
    • Enhanced app security and UX with Core Data and advanced encryption.
    • Launched a cross-border e-commerce platform serving customers across the UAE and India, handling end-to-end delivery and post-launch support.
  5. Sr. Mobile Developer | Cyber Gear LLC. Dubai, UAE

    Jan 2015 — Oct 2017
    • Built 10+ iOS & Android apps across fintech, lifestyle, and e-commerce verticals for enterprise clients.
    • Delivered secure payment integrations, in-app messaging, and Apple WatchOS companion apps.
    • Grew from mid-level engineer to senior contributor, taking ownership of full project delivery cycles and client communication.
  6. iOS Developer | Amber System Technologies, California, USA

    Nov 2013 — Dec 2014
    • Developed and maintained iOS applications using Objective-C and Xcode for US-based clients.
    • Collaborated with cross-functional teams across time zones to define requirements and ship new features on schedule.
    • Integrated RESTful APIs, optimized app performance, and applied early Agile practices in a professional client-facing environment.
  7. Mobile Application Developer | Sumtwo Software's Pvt Ltd. Madurai, India

    Sep 2012 — Nov 2013
    • Built native iOS applications from scratch, handling full development lifecycle.
    • Implemented Core Data for local storage and data persistence across apps.
    • Worked closely with designers to translate UI/UX wireframes into functional interfaces.
  8. Mobile Application Developer & Web Designer | MiPs Pvt Ltd. Madurai, India

    Dec 2011 — Aug 2012
    • Developed initial iOS apps and responsive websites as an early-career developer.
    • Designed and coded web pages using HTML, CSS, and JavaScript for client projects.
    • Gained foundational experience in mobile development and UI design principles.

My skills

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