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Full Time Software Engineer Startup Jobs in California

Opal

Software Engineer, Infrastructure

San Francisco, CA · On-site

$140K - $215K/yr

Has 4+ years experience as a full-time software engineer or equivalent experience building large distributed systems * Thrives in ambiguous environments with significant ownership and with the ...

Voltai

Software Engineer

Palo Alto, CA · On-site

They are seeking a Software Engineer with experience in implementing complex workflows and ... a hyper-growth startup. Company : AI models for electronics Founded in , the company is ...

Monarch Quantum

Software Engineer 3

San Diego, CA

$125K - $175K/yr

This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You ... As a full-time employee, you will be eligible for Monarch's comprehensive benefits package, which ...

Monarch Quantum

Software Engineer 3

San Diego, CA · On-site

$125K - $175K/yr

This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You ... As a full-time employee, you will be eligible for Monarch's comprehensive benefits package, which ...

Clera

Software Engineer

San Francisco, CA · On-site

$150K - $300K/yr

About the Role This is a hands-on individual contributor role at an early-stage startup building AI ... What We're Looking For * 2 to 5 years of professional software engineering experience; this is a ...

Monarch Quantum

Software Engineer 3

San Diego, CA · On-site

$125K - $175K/yr

This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You ... As a full-time employee, you will be eligible for Monarch's comprehensive benefits package, which ...

Clera

Software Engineer

San Francisco, CA · On-site

$150K - $300K/yr

About the Role This is a hands-on individual contributor role at an early-stage startup building AI ... What We're Looking For * 2 to 5 years of professional software engineering experience; this is a ...

Monarch Quantum

Software Engineer 3

San Diego, CA · On-site

$125K - $175K/yr

This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You ... As a full-time employee, you will be eligible for Monarch's comprehensive benefits package, which ...

Reform

Software Engineer

San Francisco, CA · On-site

Required : • 4+ years of software engineering experience, ideally in fast-paced startup environments. • Fluency in Python, JavaScript/TypeScript, and Next.js. • Passionate about logistics ...

Epsilon3

Software Engineer

Los Angeles, CA · On-site

$120K - $180K/yr

This is an impactful role within a fast-paced startup. The ideal candidate is someone who has ... This full-time role includes stock options, generous PTO, health insurance, and a 4% 401k match.

Vooma

Software Engineer

San Francisco, CA · On-site

Job Summary : Vooma is a startup seeking a Software Engineer to join their founding team. The role involves designing automation technology and building the company's infrastructure while ...

Epsilon3

Software Engineer

Los Angeles, CA · On-site

$120K - $180K/yr

This is an impactful role within a fast-paced startup. The ideal candidate is someone who has ... This full-time role includes stock options, generous PTO, health insurance, and a 4% 401k match.

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Full Time Software Engineer Startup information

What does a full time software engineer do at a startup?

A Full Time Software Engineer at a startup is responsible for designing, coding, testing, and maintaining software applications or systems that are central to the company’s product or service. In a startup environment, engineers often work on a wide range of tasks, from building new features and fixing bugs to collaborating on system architecture and deployment. They typically work closely with founders, designers, and other team members, adapting quickly to changing requirements and helping the company scale. The fast-paced and dynamic nature of startups often means engineers have significant ownership and impact on the final product.

What skills and qualifications are needed to thrive as a full time software engineer at a startup?

To thrive as a Full Time Software Engineer at a startup, you need strong programming skills, problem-solving abilities, and a degree in computer science or related field. Familiarity with modern development frameworks, cloud platforms, version control systems like Git, and agile methodologies is typically required. Adaptability, proactive communication, and a collaborative mindset help you excel in a fast-paced, evolving environment. These skills are crucial for quickly building, iterating, and scaling products while contributing effectively to a small, dynamic team.

What unique challenges might a full time software engineer face when working at a startup compared to a larger company?

As a Full Time Software Engineer at a startup, you may encounter rapidly changing priorities and a fast-paced environment where flexibility is key. Unlike larger companies with specialized teams, you’ll likely wear multiple hats, contributing to various parts of the tech stack and sometimes assisting with non-coding tasks. This dynamic can be both challenging and rewarding, offering opportunities to have a direct impact on the product and company growth. Close collaboration with founders and cross-functional teams is typical, fostering a culture of innovation and learning.

What is the difference between Full Time Software Engineer Startup vs Full Time Software Engineer Corporate?

AspectFull Time Software Engineer StartupFull Time Software Engineer Corporate
Work EnvironmentFast-paced, dynamic, small teamsStructured, larger teams, established processes
ResponsibilitiesBroader scope, wearing multiple hatsSpecialized, focused on specific areas
Career GrowthRapid learning, potential for quick advancementStructured career paths, steady progression
Compensation & BenefitsVariable, often equity-basedStable salary, comprehensive benefits

In summary, Full Time Software Engineer roles at startups offer a dynamic environment with broader responsibilities and potential for rapid growth, often with equity options. Corporate roles tend to provide more structure, specialized tasks, and stable compensation, making them suitable for those seeking stability and clear career progression.

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

The most popular types of Software Engineer Startup jobs in California are:

What are popular job titles related to Full Time Software Engineer Startup jobs in California?

For Full Time Software Engineer Startup jobs in California, the most frequently searched job titles are:

What job categories do people searching Full Time Software Engineer Startup jobs in California look for?

The top searched job categories for Full Time Software Engineer Startup jobs in California are:

What cities in California are hiring for Full Time Software Engineer Startup jobs?

Cities in California with the most Full Time Software Engineer Startup job openings:

Full Time Software Engineer Startup jobs near you
Infographic showing various Full Time Software Engineer Startup job openings in California as of September 2026, with employment types broken down into 1% Internship, 1% As Needed, 83% Full Time, 12% Part Time, 1% Temporary, and 2% Contract. Highlights an 84% Physical, 3% Hybrid, and 13% Remote job distribution.

Software Engineer, Infrastructure

San Francisco, CA • On-site

Opal
See more jobs at Opalexternal

$140K - $215K/yr

Full-time

Re-posted 29 days ago

Job description

About Opal Security:
At Opal, we're building modern identity governance for the AI era-intelligent access management that empowers enterprises to move fast while staying secure. Our mission is to bring clarity, control, and confidence to complex enterprise environments, helping teams govern access without slowing down innovation.
About the Role:
Identity is having a moment. Every company is deploying agents, spinning up service accounts, and realizing their IAM stack can't keep up. We're building AI-native security that scales with this chaos and companies like Databricks and Figma are betting on us to get it right.
You will build customer solutions across the entire stack. You'll talk directly to security and eng teams at Fortune 500s and startups alike, understand their messy reality, and architect systems that actually solve their problems. You'll own the problem, not just the solution, which means you get to be creative, challenge assumptions, and build things that don't exist yet.
Please note: We've built a team that works exceptionally well together and has fun doing so. We're looking to bring on new teammates who will both add to and grow with what we're building
Your responsibilities
  • Ensure the stability, security, scalability, and performance of Opal Security's platform
  • Take ownership of critical components of Opal Security's Infrastructure
  • Empower product engineers with the tools and systems they need
  • Work closely with leadership, our product team, and other engineers in roadmap, architecture, and product discussions
  • Create and improve engineering best practices and processes
  • Interact directly with customers on product feedback and issues

Our ideal candidate
  • Familiarity with our tech stack: Kubernetes, Golang, Postgres, Redis, Terraform, GraphQL, TypeScript, and React
  • Experience with cloud providers (e.g., AWS / GCP) and scaling cloud infrastructure
  • Has 4+ years experience as a full-time software engineer or equivalent experience building large distributed systems
  • Thrives in ambiguous environments with significant ownership and with the opportunity to make decisions that have a huge impact on the business

Apply