Haruta Watanabe (渡邉 朝太)

Wakyu Co., Ltd. (May 2024 – Present)

Software Engineer (Part-time)

• Spearheading the modernization of a legacy ERP system for a printing company using Python, Django, and PostgreSQL.
• Engineered functionalities for a healthcare asset tracking platform using Java and PostgreSQL.
• Developed a protocol management system for local government-related projects using JavaScript to ensure transparency.

Howtelevision, Inc.

Software Engineer (Intern/Part-time)

• Designed and implemented RESTful APIs using FastAPI, leveraging asynchronous programming to handle concurrent user requests efficiently.
• Utilized Python Type Hints and Pydantic within FastAPI to ensure robust data validation and reduce runtime errors in production.

GA technologies Co., Ltd. (Apr 2026)

Software Engineer (Intern)

• Developed software in Ruby by modeling real-world events and translating them into appropriate data structures and application logic.
• Focused not only on functional correctness but also on maintainability, extensibility, and code quality to create software that can continue to deliver value over time.

Minna Bank, Ltd. (Jun 2026)

Software Engineer (Intern)

• Designed and implemented core digital banking functionality as part of a team using Java and Spring Boot.
• Proactively monitored team progress and issues, supported other members, and helped coordinate the team to keep development moving forward.

DMM.com LLC (Aug 2026)

Software Engineer (Intern)

• Developed backend functionality for a social networking service using Go.
• Worked with Onion Architecture and gained hands-on experience in separating responsibilities across handlers, use cases, and repositories while managing dependencies between application layers.

Loglass Inc. (Aug 2026)

Software Engineer (Intern)

• Developed a management accounting system as part of a team, implementing functionality from journal-entry import through automated generation of profit-and-loss statements and balance sheets.
• Translated real-world accounting workflows and business requirements into application features and data structures.

M3, Inc. (Aug 2026)

Software Engineer (Intern)

• Proposed, designed, and implemented a new feature aimed at increasing the value of an existing application.
• Evaluated feature requirements and implementation approaches from an ROI perspective, considering both expected business impact and development cost rather than focusing solely on technical feasibility.

GMO Internet Group, Inc. (Aug 2026)

Software Engineer (Intern)

• Developed a domain registrar system in a four-person team while learning domain names, DNS, and registrar operations, taking responsibility for APIs, database design, and AI functionality.
• Redesigned database access patterns and reduced Firestore reads from approximately 17,000 per day to approximately 860 per day.
• Implemented an in-browser AI chat feature using a client-side inference model, reducing reliance on external AI APIs and minimizing server-side inference costs.

Choco Next Year For Sure (Sole Proprietorship) (May 2025 – Present)

Founder & Lead Developer

• Founded a sole proprietorship and led a cross-functional team of developers to deliver full-stack solutions.
• Architected and deployed a cross-platform mobile application using Flutter and Firebase, managing the entire product lifecycle.:
• Developed high-performance web platforms using Astro and Tailwind CSS, optimizing for Core Web Vitals and SEO.

Chuo University | Tokyo, Japan

Bachelor of Laws (LL.B.) | Expected Mar 2028

GPA: 3.48/4.0 (Upward Trend: 3.61/4.0 in the most recent academic year)

The University of Tokyo, Matsuo Iwasawa Laboratory | Remote

GCI (Global Consumer Intelligence) Data Science Program | Mar 2026

• Completed intensive data science and machine learning curriculum using Python.
• Mastered predictive modeling and data analysis using NumPy, Pandas, and Scikit-learn.

Harvard University (via edX) | Remote

CS50x: Introduction to Computer Science | Jan 2026

• Validated foundational knowledge in Data Structures, Algorithms, and Memory Management.
• Completed complex problem sets in C, Python, SQL, and JavaScript.