cv

iOS Engineer

Wolt

iOS engineer on the consumer app at a Helsinki-based delivery platform that connects customers, merchants, and couriers for food, groceries, retail, and more. Swift / iOS.

• Implemented the city-status module on the discovery homepage, which surfaces city-wide conditions such as late-night closures or slower delivery during busy periods.
• Implemented the address-entry flow for Japan, using postcode lookup.
• Owned a large-scale renewal of the iOS store page, focusing on the scrolling experience and store header.
• Implemented Google Consent Mode and marketing-consent handling, including consent sync across the apps.
• Automated regression tests for the onboarding flow with Maestro.
• Added European Accessibility Act support in the app for search, discovery, and address entry.
• Developed the category page, where users browse restaurants, groceries, and retail by category, with filters and a product-first view across nearby stores.
• Operated and maintained Wolt’s backend-driven UI rendering engine.
• Built an experimental iOS frontend for an AI grocery-assistant chatbot.

iOS Engineer

株式会社InTrip

Freelance iOS engineer on a Zen practice and sound meditation app. Swift / iOS.

• Implemented new features such as My Page and a Zen diary.
• Strengthened automated coverage of app behavior and UI with unit and snapshot tests.
• Restructured the billing and in-app purchase flow.

Software Engineer

週末養蜂

Freelance backend developer for a Japanese beekeepers’ organization that sells equipment and runs Q&A, e-commerce, and community sites. NestJS / TypeScript.

• Migrated the backend of the beekeepers’ Q&A site from a legacy stack to a modern one (38qa.net).
• Wrote up the migration: A service renewal of backend built upon AWS Lambda.

Software Engineer

ISI-Dentsu of America, Inc.

Designed and developed proofs of concept and prototypes, ran client trials to assess feasibility, and researched business opportunities with local tech startups for a Japanese technical consultancy. Swift, Objective-C, iOS, Ruby on Rails, Vue.js, Python, Android.

• Developed the backend for an AI robot that supports simple conversation. (konel.jp)
• Developed a travel-spot media site focused on photography. (docoico.world)
• Developed the backend and iOS app for a weekend event-planner prototype for families.
• Developed Facebook Messenger and LINE chatbot prototypes for lounge spaces worldwide.
• Developed an iOS app prototype that maps air-pollution data from an air-quality monitoring IoT device.
• Conducted a feasibility study of a ride-hailing platform and mobile SDK for Japanese clients.
• Conducted a feasibility study of a customer-support chatbot for Japanese clients.
• Conducted a feasibility study of IoT smart glasses and their SDK.

Frontend Developer

週末養蜂

Freelance frontend developer for the same beekeepers’ organization. React / TypeScript.

• Developed the frontend for a beekeeper friend-search map. (38qa.net/friend-map)
• Developed a Medium-style rich text editor for 38qa.net.
• Developed a simple chat and Facebook Messenger-style widget for 38qa.net.
• Developed the frontend for a public chat widget on 38qa.net.

iOS Engineer

株式会社ミライセルフ

Freelance iOS engineer for a service that assesses cultural fit between companies and job applicants. Swift / iOS.

• Developed an iOS prototype of an aptitude test for applicants and companies.

Programming Teacher

NexSeed, Inc.

Taught iOS app development part-time at an English and programming school. Objective-C / iOS.

• Helped students launch more than 15 apps on the App Store.

iOS Engineer

CyberAgent

Worked in the social media department. Developed two iOS apps from scratch, supervised and contributed to three more, contributed to the Ameba iOS SDK, and advised a cooking SNS project on adopting it. Objective-C / iOS.

• Built an iOS app from scratch for a cooking SNS where users edit and share food photo diaries, on a cross-functional team. (Pecolly)
• Built an iOS app from scratch for an SNS focused on sharing funny pictures and jokes, on a 5-person cross-functional team. (App Store)
• Developed an iOS app for organizing social clubs online, and mentored another iOS engineer.
• Developed an iOS app for a Twitter-like SNS, and mentored another iOS engineer.
• Developed an iOS virtual-pet game and the in-game web pages.

Game Programmer

PONOS Corporation

Built mobile games from scratch with cross-functional teams for NTT Docomo, SoftBank, the App Store, and Google Play. Released four games. Java, C, Objective-C++, iOS, Android, OpenGL.

• Developed iOS and Android action games focused on intuitive controls and tense, high-energy gameplay. (Mr. Oops)
• Developed an iOS strategy game in which players defend their territory and resources by blocking enemy attackers. (Ballistik)
• Developed mobile action and strategy games featuring battles between armed planets, with a focus on well-balanced difficulty. (Battle Planet)
• Developed a mobile shooting game that simulates a shooting gallery at a Japanese festival. (Syateki)

Ritsumeikan University, Shiga, Japan

Computer Science