Senior Software Engineer

Yossi Hertzberg

I build AI-driven and cloud-based products across backend systems, fullstack experiences, and infrastructure.

San Francisco, CA
LinkedIn / Experience

About

I like building products that sit between strong engineering and strong product taste. Recent work has included multimodal AI creation tools, multilingual dubbing systems, cloud security products, and AI-driven analytics.

I work best on product-minded engineering teams where the job is not just to build the system, but to shape the experience, make smart technical tradeoffs, and ship something people actually use.

Selected Impact

Experience

Senior Fullstack Software Engineer

Kapwing // San Francisco, CA

March 2025 - Present
  • Improved AI dubbing quality, alignment, and reliability.
  • Built key parts of Kai, Kapwing's multimodal creation agent.
  • Shipped fullstack features quickly in a startup environment.

Senior Software Engineer

Cradlepoint (part of Ericsson) // Los Gatos, CA and Remote, San Francisco, CA

June 2021 - November 2024
  • Worked across both security and visibility/AI teams.
  • Built cloud services in Go and Python for secure networking products.
  • Designed APIs and data systems with Django, Redis, DynamoDB, and Kafka.
  • Helped launch the company's first AI-driven customer insights.

Software Engineer

Juniper Networks // Sunnyvale, CA

October 2019 - June 2021
  • Contributed to Sky ATP, a cloud-based Advanced Threat Protection platform.
  • Helped design and launch the Encrypted Traffic Analysis feature, showcased at RSA 2020.

Undergraduate Head Tutor

UCSB Computer Science Department // Santa Barbara, CA

January 2018 - March 2019
  • Paid head tutor, working with 60+ students each quarter across multiple CS classes.
  • Supported students in core programming coursework and helped create study resources.

Selected Work

Kai

Kapwing

Multimodal AI creation agent work spanning tooling, workflows, and reliability.

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AI Dubbing

Kapwing

Speech quality and alignment improvements for multilingual video localization.

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Secure Connect

Cradlepoint

Cloud backend work for secure networking products and supporting data systems.

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Education

University of California, Santa Barbara

Bachelor of Science in Computer Science

September 2015 - June 2019

Graduated with High Honors // GPA 3.9

Regents Scholar and member of the Engineering Honors Program.

Skills

Focus Areas

AI product engineering, LLM agents, multimodal systems, backend platforms, and end-to-end product delivery.

Languages & Frameworks

Python, Golang, TypeScript, React, Django, REST APIs.

Cloud & Infrastructure

  • AWS: EC2, SQS, S3
  • Terraform
  • Kubernetes
  • Docker and Helm
  • Kafka
  • CI/CD

Databases

PostgreSQL, MongoDB, DynamoDB, Redis.

Other

Technical communication, Agile development, Git, JIRA/Confluence, Sentry, Amplitude.

Awards & Milestones

Leadership & Community

Board Member and Crew Captain

Midnight Runners

June 2022 - Present

Help support a global running and fitness community through local leadership, event support, and community building.

Computer Science Tutor and Mentor

UC Santa Barbara and AVID

Mentored students in core computer science coursework and supported first-generation students academically through tutoring and study guidance.