I seek roles where I can develop or lead mobile app projects, apply Flutter expertise, and work with cloud-native deployments while delivering scalable, cost-effective solutions.
TH
Looking for a job
Tatsuji Haga
@tatsujihaga
Cross-platform Flutter developer with project leadership and a background as a medical technologist.
JapanWhat I'm looking for
I am a cross-platform application developer with over five years of professional experience building Flutter apps across Android, iOS, and Web.
I have contributed to UI/UX design, database design, coding, QA testing, and app store submissions, and I regularly collaborate with remote foreign teams. Notable projects include agentic AI chat apps, AI phone assistant prototypes, and multiple video-call and attendance systems used in healthcare and education contexts.
Technically, I specialize in Flutter (MVVM, Riverpod state management) and have strong experience with Firebase/Cloud Firestore, GitHub, as well as working knowledge in Python, TypeScript, Node.js, GCP, GKE, Azure, MySQL, Docker, and ROS. I emphasize scalable deployments, maintainability, and cost visibility in system design.
I can communicate and negotiate with stakeholders in English (CEFR B2) and Japanese (native), and I prioritize delivering robust, user-focused solutions that reduce operational costs and improve workflows.
Experience
Work history, roles, and key accomplishments
IL
Current
Computer Programmer
iPresence Ltd.
Jun 2020 - Present (5 years 4 months)
Led cross-platform Flutter development and project scheduling for multiple mobile and web apps, digitizing office workflows and reducing maintenance costs while coordinating international teams in English.
Education
Degrees, certifications, and relevant coursework
RC
(RESKILLING) TECH CAMP
Certificate, Computer Programming
2019 - 2019
Grade: N/A
Activities and societies: Studied Ruby on Rails, JavaScript, jQuery, HTML, Haml, CSS, SCSS, GitHub, MySQL, and AWS (EC2, S3).
Completed an intensive 2.5-month programming bootcamp covering web development, Ruby on Rails, JavaScript, and related tools.
KH
Kyoto College of Health and Hygiene
Diploma, Medical Laboratory Science
2013 - 2017
Grade: N/A
Activities and societies: Studied medical laboratory-related subjects.
Completed a 4-year medical course focused on clinical laboratory and medical technologist skills.
Tech stack
Software and tools used professionally
Availability
Looking for a job
Location
JapanAuthorized to work in
Salary expectations
6000k-12000k JPY
Social media
Job categories
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