I am a software developer that has the experience from frontend to backend. I have about 10 years of experience in software industry. My strengths lie within iOS development. I have made about 10 iOS apps from scratch. Also, I have made the apps from scratch with Ruby on Rails, NestJS, Vue.js, React.js, Android, etc.

Table of contents


Name Kenzan Hase
Label Software Developer


  • 2022.01 - Present
    Software Engineer
    Wolt Enterprise Oy
    Working as an iOS developer.
  • 2021.04 - 2021.12
    iOS Developer
    Worked as an iOS developer.
    • Implemented new features like mypage and zen diary.
    • Introduced unit test and snapshot test.
    • Refactored in-app-purchase code.
  • 2020.07 - 2021.02
    Backend Developer
    Worked as a backend software developer.
    • Migrated the backend of beekeeper's Q&A website from legacy to modern backend.
  • 2019.02 - 2019.07
    Frontend Developer
    Worked as a frontend developer.
    • Developed frontend of beekeeper's friend search map.
    • Developed frontend of medium like rich text editor on
    • Developed simple chat and widget like Facebook Messenger on
    • Developed frontend of public chat widget on
  • 2015.02 - 2020.03
    Software Engineer
    ISI-Dentsu of America, Inc.
    Designed and developed proof of concepts and prototypes. Conducted demonstrative trials with clients in order to determine feasibility. Researched business opportunities with local tech startups.
    • Developed backend of AI robot allowing you to have simple conversations with it.
    • Developed travel spot media website specializing into the photos.
    • Developed backend and iOS app of weekend event schedule planner prototype for family.
    • Developed Facebook Messenger and Line chatbot prototypes used at lounge space located all over the world.
    • Developed iOS app prototype displaying graphical information of air pollution on the map with air quality monitoring IoT device.
    • Conducted feasibility study of ridehail platform and the mobile SDK for Japanese clients.
    • Conducted feasibility study of customer support chatbot for Japanese clients.
    • Conducted feasibility study of IoT smart glasses and the SDK.
  • 2014.10 - 2015.02
    iOS Developer
    Worked as an iOS developer.
    • Developed iOS prototype of aptitude test for applicant and companies.
  • 2014.02 - 2014.08
    Programming Teacher
    NexSeed, Inc.
    Taught iOS App Development.
    • Assisted students to launch more than 15 Apps on App Store.
  • 2011.11 - 2013.09
    iOS Engineer
    Worked in a social media department. Developed 2 iOS Apps from scratch. Supervised and Involved in 3 iOS Apps. Involved in development of Ameba iOS Software Development Kit (SDK). Advised the development with utilizing the SDK in cooking SNS project as a model case.
    • iOS App for cooking SNS editing and sharing food photo diary. Worked with 8 members multi-functional team (including directors, designers, Web engineers, and Android engineer).
    • iOS App for SNS sharing funny pictures and jokes. Worked with 5 members multi-functional team.
    • Developed iOS App for SNS organizing social clubs on the Internet and taught another iOS engineer coding.
    • Developed iOS App for Twitter like SNS and taught another iOS engineer coding.
    • Developed iOS Game raising virtual pets and Web page in the game.
  • 2010.04 - 2011.10
    Game Programmer
    PONOS Corporation
    Worked on projects with multi-functional teams and developed Mobile Games from scratch in multiple platforms. (Docomo, Softbank, App Store, and Google Play Store)
    • Developed iOS and Android Action Games specializing into intuitive interaction and letting players full of nervous excitement.
    • Developed iOS Strategy Game whose goal is to defend a player's territories and possessions by obstructing enemy attackers.
    • Developed Mobile Action and Strategy Games armed planets battle. Focused on good difficulty level in a fine balance.
    • Developed Mobile Shooting Games simulating shooting galley in Japanese festival.


  • 2005.04 - 2010.03
    Ritsumeikan University, Shiga, Japan
    Computer Science


Native proficiency
Professional working proficiency
Elementary proficiency