About the role
What we are looking for?
We are seeking a Staff Frontend Software Engineer, Infra with 7+ years of experience building frontend applications at scale. This individual will be crucial in transforming Harmonic's frontend from "it works" to "it works flawlessly," ensuring reliability, performance, and developer enablement. We need someone who can drive technical decisions and mentor the team through complex migrations, especially those with experience from companies like LinkedIn due to the similar technical challenges in managing large databases of people.
What will you be doing?
- Fix core reliability issues: error boundaries, state management, data consistency.
- Optimize performance: virtualization for large datasets, bundle optimization, render performance.
- Build monitoring and observability to catch issues before users do.
- Establish testing strategies that prevent regressions.
- Create abstractions and patterns that help engineers ship faster without breaking things.
- Drive technical decisions and mentor the team through complex migrations.
About X5 Labs
X5 Labs is a stealth-mode AI startup building a work model for regulated enterprises. The company develops an ambient discovery platform that observes everything an employee does on their computer — watching screen activity, mouse movements, and keyboard inputs — then augments and enhances their workflows using custom AI models deployed end-to-end within the customer's environment.