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Internship Founding Engineer Jobs in California (NOW HIRING)

Tacit

RF Hardware Intern (Fall 2026)

San Francisco, CA · On-site

$40 - $60/hr

We are backed by General Catalyst, Khosla Ventures, and Greylock Partners, with a founding team ... Engineering, or a closely related field * Available for a fall-start internship, onsite in San ...

interface.ai

Software Engineer

San Francisco, CA · On-site

$135K - $175K/yr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

... internship work that shipped. Any one of these matters more to us than GPA. * You've built with ... Founding-team-tier equity, top-of-market base, comprehensive benefits, and a modern San Francisco ...

Antares

Nuclear Engineer I/II

Los Angeles, CA · On-site

$120K - $160K/yr

Coursework or internships involving Multiphysics modeling * Interest or experience in microreactors ... Culture At Antares, we like to specifically tie each role to our founding document's set of values ...

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All JobsFounding Engineer JobsInternship Founding Engineer JobsInternship Founding Engineer Jobs in California

Internship Founding Engineer information

What is the difference between Internship Founding Engineer vs Software Engineering Intern?

AspectInternship Founding EngineerSoftware Engineering Intern
CredentialsTypically students or recent graduates with foundational coding skillsStudents or early-career individuals learning software development
Work EnvironmentStartups or early-stage companies, often in collaborative, fast-paced settingsLarge tech companies, startups, or academic projects
Employer & Industry UsageUsed in startup environments to build core productsCommon in tech companies for training and talent pipeline

The main difference is that an Internship Founding Engineer is often a role in early-stage startups focusing on building foundational technology, while a Software Engineering Intern typically works in larger companies or academic settings to gain experience. The Founding Engineer role may involve more responsibility and influence on product development, whereas the Intern role is more learning-focused.

What are the most commonly searched types of Founding Engineer jobs in California?

The most popular types of Founding Engineer jobs in California are:

What are popular job titles related to Internship Founding Engineer jobs in California?

For Internship Founding Engineer jobs in California, the most frequently searched job titles are:

What job categories do people searching Internship Founding Engineer jobs in California look for?

The top searched job categories for Internship Founding Engineer jobs in California are:

What cities in California are hiring for Internship Founding Engineer jobs?

Cities in California with the most Internship Founding Engineer job openings:

Internship Founding Engineer jobs near you
Infographic showing various Internship Founding Engineer job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.

Senior Software Engineer, Resilience

Persona Identities, Inc

San Francisco, CA • On-site

$190K - $250K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 24 days ago

Job description

About Persona
Persona is the configurable identity platform built for businesses in a digital-first world. Verifying individuals and organizations is harder - but more important - than ever, with AI enabling fraudsters to launch sophisticated accounts at scale and regulations evolving rapidly.
We've built Persona to support practically every use case and industry - that's why we're able to serve a wide range of leading companies. For example, Reddit relies on Persona for age assurance and verification to comply with online safety regulations, protecting younger users while maintaining a seamless experience. Meanwhile, OpenAI relies on Persona to keep bad actors out, protecting one of the world's most powerful AI platforms from large-scale abuse in a time when AI is reshaping the way we work and live.
We're growing rapidly and looking for exceptional people to join us!
About the role
This isn't just another engineering role. This is a unique opportunity to be a founding member of our new Resilience Engineering function and shape the future of performance and scalability at Persona. As our products grow in complexity and adoption, we're building a specialized team to act as a force multiplier for all of engineering. You won't own a single service; instead, you'll be a trusted partner embedded within product teams, tackling their most critical challenges in performance, scalability, and observability. We're looking for someone who is a systems thinker, part detective, part diplomat, and part architect, and who's ready to help build a new function from the ground up.
What you'll do at Persona
  • Partner with product teams on short-term, high-impact projects to solve their most pressing performance and observability challenges.
  • Dive deep into major incidents to uncover underlying architectural causes and drive systemic improvements to prevent future failures.
  • Design, build, and promote reusable resilience patterns and tooling that make it easy for all engineers to build reliable services.
  • Own and advance our observability strategy, defining the standards and building the tools that help us understand system health.
  • Mentor and coach engineers across the organization, raising the technical bar for performance and reliability.
  • Establish and drive a new Operational Excellence review process to foster a culture of accountability and continuous learning.
  • Help define and measure SLOs for our most critical user journeys, making our product tangibly faster and more reliable for customers.

What you'll bring to Persona
  • A strong software engineering background, demonstrated by 10+ years of experience building and shipping complex production systems.
  • Direct experience in performance, scalability, or observability is a significant plus, but not required for a candidate with a deep engineering foundation.
  • Enjoys mentoring other engineers and can clearly and concisely explain complex technical ideas.
  • Deep expertise in the three pillars of observability (metrics, logs, and traces) and experience in instrumenting complex, distributed systems.
  • The ability to listen with empathy, build trust, and influence other teams without direct authority.
  • Ability to build robust, well-tested libraries and tools that improve the work of other engineers.
  • Takes Initiative, comfortable with ambiguity, and effective at driving projects in a new and evolving environment.

Benefits and Perks
For full-time US-based employees (excluding internship and contractor opportunities), Persona offers a wide range of benefits, including medical, dental, and vision, 3% 401(k) contribution, unlimited PTO, quarterly mental health days, family planning benefits, professional development stipend, wellness benefits, among others.
For full-time UK employees, Persona offers a wide range of benefits, including private medical insurance, dental insurance, a 6% employer pension contribution, unlimited PTO, a monthly wellness stipend, professional development stipend, co-working stipend, and more.
As part of our interview process, all candidates will be asked to verify their identity with Persona. This step is used solely to confirm that candidates are who they say they are, and will have no impact on hiring decisions.

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