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Founding Full Stack Software Engineer Jobs in California

twenty80.io

Founding Full Stack Engineer

San Francisco, CA · On-site +1

$150K - $190K/yr

About the Role An early-stage startup is hiring a Founding Full Stack Engineer to help build its ... Git (GitHub or similar) What We're Looking For * 6+ years of professional software engineering ...

EQL Tech

Founding Full-Stack Engineer

Burlingame, CA

$180K - $240K/yr

Founding Full-Stack Engineer On-site Engineering, Product & Tech Full time San Francisco, California, United States Our client is a stealth, seed-stage startup building an AI-powered wearable ...

Helium

Founding Full-Stack Engineer

San Francisco, CA · On-site

Helium is building Self-Improving Software, utilizing AI to automatically generate and test new software experiences to enhance revenue. They are seeking a Founding Full-Stack Engineer to own ...

Notch

Founding Full-stack engineer

San Mateo, CA · On-site

As the founding full-stack engineer, you will build AI-forward user interfaces, fine-tune LLMs, and architect robust backend infrastructure to support the company's vision. Responsibilities : • ...

Clera

Founding Full Stack Engineer

San Francisco, CA · On-site

$135K - $155K/yr

As a Founding Full Stack Engineer , you'll own architecture and implementation across multiple integrated products. You'll design the core infrastructure, data models, and AI-driven workflows that ...

Hop

Full Stack Software Engineer

Los Angeles, CA · On-site

Full Stack Software Engineer Location: Los Angeles, CA We are seeking highly motivated, collaborative, and technically strong Full Stack Software Engineers to join our Enterprise Technology ...

Hop

Full Stack Software Engineer

Los Angeles, CA

Full Stack Software Engineer Location: Los Angeles, CA We are seeking highly motivated, collaborative, and technically strong Full Stack Software Engineers to join our Enterprise Technology ...

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Founding Full Stack Software Engineer information

What are the key skills and qualifications needed to thrive as a founding full stack software engineer?

To thrive as a Founding Full Stack Software Engineer, you need deep expertise in both front-end and back-end development, strong problem-solving skills, and experience building scalable web applications, usually demonstrated by a degree in computer science or equivalent experience. Mastery of tools and frameworks such as JavaScript, React, Node.js, cloud platforms (AWS, GCP), and version control systems like Git is typically required. Exceptional communication, adaptability, and entrepreneurial mindset are crucial for collaborating in a dynamic startup environment and driving product vision. These skills are vital for rapidly iterating, shipping robust products, and establishing a strong technical foundation for a growing company.

What is a founding full stack software engineer?

Founding Full Stack Software Engineers are technical professionals who join a startup at its earliest stages to help build and shape the company's core products and technology infrastructure. They work across both the front-end and back-end of applications and play a key role in making architectural decisions, setting up development processes, and establishing the technical foundation. As 'founding' team members, they often have greater responsibilities, including working closely with company founders, contributing to product strategy, and sometimes receiving equity or a stake in the company.

What unique challenges might I face as a founding full stack software engineer in an early-stage startup?

As a Founding Full Stack Software Engineer, you’ll often juggle multiple responsibilities, from designing core architecture to deploying code and setting up development workflows. Since resources are limited and the product vision can evolve quickly, adaptability and strong communication with founders and other early team members are key. You may also be deeply involved in decisions beyond pure engineering, such as hiring, product strategy, and even customer support. This environment can be both demanding and highly rewarding, offering accelerated learning and significant influence over the company’s technical direction.
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Founding Full Stack Software Engineer jobs near you
Infographic showing various Founding Full Stack Software Engineer job openings in California as of August 2026, with employment types broken down into 1% Internship, 85% Full Time, 9% Part Time, 2% Temporary, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution.

Founding Fullstack Software Engineer

Sato Inc

Bodega Bay, CA

$200K - $270K/yr

Full-time

Re-posted yesterday

Job description

A venture-backed startup is looking for a Founding Full-Stack Software Engineer to join its early team and help build the core product from the ground up. The company is developing a next-generation software platform and is seeking an engineer who thrives in fast-paced startup environments and enjoys owning large technical challenges end-to-end.

This role offers the opportunity to work closely with the founding team to shape the product, establish the technical foundation, and build scalable systems from day one.

About the Role

The Founding Full-Stack Software Engineer will play a key role in designing, building, and scaling the company’s platform. This individual will be responsible for developing features across the full stack, contributing to architectural decisions, and helping define engineering best practices as the team grows.

This is a high-impact role for someone who enjoys working with significant ownership and influencing both product and technical direction in an early-stage company.

Key Responsibilities

  • Design and develop core product features across both frontend and backend systems.

  • Build scalable and maintainable application architecture to support rapid growth.

  • Collaborate closely with founders, product, and design to translate product ideas into production-ready features.

  • Own projects end-to-end, from concept and development to deployment and iteration.

  • Improve platform reliability, performance, and security.

  • Establish engineering processes, development workflows, and technical standards as the team grows.

  • Contribute to product roadmap discussions and help prioritize technical initiatives.

Qualifications

  • 3–8+ years of full-stack software engineering experience, ideally in startup or high-growth environments.

  • Strong experience with modern frontend frameworks such as React or Next.js.

  • Backend development experience using Node.js, Python, Go, or similar languages.

  • Experience designing and building scalable APIs and backend systems.

  • Familiarity with cloud infrastructure (AWS, GCP, or Azure).

  • Experience working with SQL and/or NoSQL databases.

  • Ability to operate independently and take ownership of complex technical projects.

  • Strong problem-solving skills and a product-oriented mindset.

Nice to Have

  • Previous experience as an early or founding engineer at a startup.

  • Experience designing systems and architecture from scratch.

  • Familiarity with DevOps practices, CI/CD pipelines, and infrastructure automation.

  • Experience building SaaS or developer-facing products.

What the Company Offers

  • Opportunity to join as a foundational member of the engineering team.

  • Significant influence over technical architecture and product direction.

  • Competitive compensation and meaningful equity participation.

  • The chance to build and scale a product from 0 → 1 alongside the founding team.