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Haileeysus Gashaye

@haileeysusgashaye

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Senior Software Engineer with expertise in cloud-native applications.

United States

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What I'm looking for

I am looking for a role that fosters innovation and collaboration, where I can leverage my skills in cloud-native development and mentor others.

I am a Senior Software Engineer with over 14 years of experience in designing and building scalable, cloud-native web and mobile applications. My expertise lies in full-stack development, API design, and cloud infrastructure, with a proven track record of enhancing performance, security, and system reliability in high-growth, agile environments.

At Notion, I led the architecture and development of core features for Notion Projects and Notion Calendar, implementing robust systems that improved user experience and streamlined permissions management. My work involved engineering real-time synchronization systems and migrating legacy systems to a Kubernetes-based architecture, significantly reducing deployment times. I am passionate about mentoring junior engineers and fostering a culture of learning and engineering excellence.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Notion

Feb 2020 - Apr 2024 (4 years 2 months)

Led full-stack architecture and development of core features for Notion Projects and Notion Calendar, delivering scalable, real-time collaboration tools. Implemented RBAC, real-time synchronization, and designed PostgreSQL-based systems to enhance performance and user experience.

Full Stack Developer PostgreSQL WebSockets gRPC DevOps React TypeScript

Senior Software Engineer

Iterable

Aug 2014 - Feb 2020 (5 years 6 months)

Optimized system performance and developed scalable features for a marketing platform. Architected an event-driven messaging platform using Apache Kafka and built microservices for multi-channel orchestration and A/B testing.

Apache Kafka Microservices REST APIs A B Testing

Full-Stack Developer

HCA Healthcare

Oct 2011 - Jul 2014 (2 years 9 months)

Enhanced the PatientKeeper platform by optimizing clinical workflows and ensuring secure patient data management. Developed user-friendly interfaces and server-side applications, participating in the full software development lifecycle.

JavaScript Java HTML CSS Agile Server Applications

Education

Degrees, certifications, and relevant coursework

Stony Brook University

Bachelor of Computer Science, Computer Science

2011 -

Completed a Bachelor of Computer Science, gaining foundational knowledge in software development, algorithms, and data structures, which has been applied in various professional settings.