Junior Software Engineer

About the role

We're hiring a Junior Software Engineer to build Multifactor's platform alongside a small, senior team. You'll ship production code, own real features, and grow quickly by working closely with engineers who care about doing things right.

What You'll Do

• Ship production code across Multifactor's product surface — backend services, APIs, browser extensions, and client applications.
• You'll be in the codebase every day.
• Own features end-to-end, with support.
• Take a well-scoped problem and turn it into working software.
• You'll get guidance on the hard parts and the autonomy to figure out the rest.
• Learn from senior engineers and the founder.
• You'll pair, review, and design alongside people who've built production systems before.
• Help build the security layer for the agentic web.
• Contribute to systems that prevent prompt injection, credential theft, confused-deputy attacks, and cross-agent hijacking.
• Level up on engineering fundamentals.
• Testing, CI/CD, code review, incident response — you'll pick up the habits and tooling that make a strong engineer, working in a team that takes them seriously.

Who You Are

• 0–3 years of software engineering experience. New and recent grads are welcome.
• We care more about how you think and how fast you learn than about years on a résumé.
• A hands-on builder. You like writing code and shipping things.
• Personal projects, internships, coursework, or open-source contributions that show you can build are all strong signals.
• Comfortable across the stack, or eager to be. You've worked with backend systems (APIs, services, data stores) and can build frontend when needed — or you're excited to get there quickly.
• You want to ship the whole feature, not just your piece of it.
• Security-conscious, or curious to become so. You don't need to be a security expert. You do need to care about getting things right and be interested in learning how to think about threat models.
• Comfortable with ambiguity. Seed-stage means the roadmap changes. You can make progress with incomplete information and ask good questions when you're stuck.
• Careful and fast. You write code quickly without cutting corners on correctness. When your platform secures people's bank accounts and enterprise systems, precision matters.
• A clear communicator. You can explain what you built, ask for help when you need it, and take feedback well. That's how you'll grow here.

Nice to Have

• Experience building browser extensions or working with browser extension APIs.
• Familiarity with TypeScript/JavaScript, Python, or Rust.
• Exposure to relational databases and cloud infrastructure (AWS/GCP).
• Contributions to open-source projects.
• Internship or project experience at a startup, or anywhere correctness mattered.

Compensation & Benefits

• Salary: $95,000 – $145,000
• Equity: 0.25% – 0.50%
• Unlimited PTO with a culture that actually encourages using it
• Wellbeing & professional development reimbursements
• Commuter benefits for getting to our SF office
• Employer-sponsored retirement savings (401k w/ matching)
• Employer-sponsored dental, vision, health, and life benefits