Open to opportunities

Ryusei Canastra

@ryuseicanastra

Senior software engineer specializing in Java and C# building high-value, production-ready features for fast-paced startups.

United States

Message

What I'm looking for

I seek roles where I can build production-grade systems, tackle realtime and mobile challenges, work in an agile team, and drive measurable product and performance improvements.

I am a Senior Software Engineer with 4.5 years of experience designing and delivering high-quality software for fast-paced startup environments. I specialize in Java and C#, have built full-stack SaaS systems, Unity mobile apps, and high-performance realtime servers, and I focus on robust engineering, measurable performance improvements, and shipping user-facing products.

At Kinetic Reality I led development of C# Unity iOS apps that integrated OpenAI APIs and proprietary models, engineered AWS-hosted Python services, refactored Java realtime servers to reduce packet loss and increase sensor precision, and helped turn prototypes into investor-ready demos.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Kinetic Reality, Inc.

Oct 2021 - Present (4 years 8 months)

Built C# Unity iOS apps and a full-stack SaaS integrating AWS EC2 and PayPal APIs, improved real-time Java server reliability to production level and reduced packet loss ~25% through core refactors.

C++Unity Java AWS EC2 Python WebSockets REST APIs AngularJS PayPal

Software Engineer Intern

Kinetic Reality, Inc.

Jun 2021 - Oct 2021 (4 months)

Co-developed a Unity C# motion-tracking multiplayer desktop game backed by a realtime Java server and presented demos that supported investor interest.

Unity C++Java Real Time Systems Motion Tracking Game Development

Education

Degrees, certifications, and relevant coursework

San José State University

Bachelor of Science, Applied and Computational Mathematics

2017 - 2021

Completed a B.S. in Applied and Computational Mathematics with a Computer Science minor, focusing on AI, databases, data structures, and object-oriented design; recognized as Dean's Scholar (Fall 2020) and President's Scholar (Spring 2021).