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Founding Full Stack Software Engineer Jobs in Berkeley, CA

Gumloop

Full Stack Software Engineer

San Francisco, CA · On-site

$185K - $250K/yr

  • Retirement

  • PTO

Role Overview We're looking for an experienced Full Stack Engineer to ship product at the highest ... Prior experience as a founder or founding engineer * Strong sense of product taste * Experience ...

Fennel AI

Founding Full Stack Engineer

Menlo Park, CA · On-site

Ability to independently develop, own and execute on a roadmap * 2+ years of industry experience as a software engineer with full-stack experience * Curiosity to work in a new field - previous ...

Floot

Founding Full-Stack Engineer

San Francisco, CA · On-site

Floot is a startup looking for their first engineer to work closely with the founders in building their product and shaping the company culture. The role involves developing full-stack features ...

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All JobsFounding Full Stack Software Engineer JobsFounding Full Stack Software Engineer Jobs in Berkeley, CA

Founding Full Stack Software Engineer information

See Berkeley, CA salary details

$54.5K

$165K

$233.3K

How much do founding full stack software engineer jobs pay per year?

As of Aug 18, 2026, the average yearly pay for founding full stack software engineer in Berkeley, CA is $165,018.00, according to ZipRecruiter salary data. Most workers in this role earn between $135,900.00 and $193,500.00 per year, depending on experience, location, and employer.

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 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 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

Full-stack Software Engineer

Integrated Biosciences, Inc.

Redwood City, CA • On-site

Full-time

Medical, Dental, Retirement

Re-posted 23 days ago

Job description

About Integrated Biosciences 

At Integrated, we are focused on advancing small molecule therapeutics for age-related diseases. We have built a first-of-its-kind discovery platform at the intersection of phenotypic models of aging, chemistry, and AI. Backed by top-tier VCs, and with recent publications in Cell (2025), Nature (2024), Nature Aging (2023), and Nature Protocols (2025), we're rapidly expanding our senior scientific team to accelerate our growing pipeline.

About the Role 

We're seeking a driven full-stack software engineer to join us at this pivotal moment. In this role, you'll work with engineers and scientists to build tooling that drives our drug discovery pipeline forward.

As one of the early engineers on the team, you'll have the opportunity to make an outsized impact on both our technology and the way we operate. We're open to candidates across a range of experience levels, but we care deeply about being hands-on, moving quickly, and shipping high-quality systems.

With AI, we operate on the timescale of days, not weeks. If you're passionate about improving human health and can build reliable software quickly, we want to hear from you.

You will 

  • Partner closely with scientists to understand novel problems in drug discovery and develop software solutions to solve these problems at scale
  • Improve and optimize existing software to support our rapidly growing team
  • Build bespoke tools for complex problems in wet-lab experimental design and automation, computational drug discovery, and data science
  • Integrate these tools into our broader AI agent harness to directly accelerate drug development for age-related diseases

You're a good fit if you have (required) 

  • Bachelor's or master's degree in computer science or a related field
  • Experience architecting and building full stack systems, from database and backend infrastructure to frontend applications
  • Ability to provision, deploy, and manage cloud resources and infrastructure such as Docker, Vercel, AWS, and bare metal
  • Fluency in leveraging AI tools such as Claude Code, Codex, Opencode, and Grok to build software quickly
  • Eagerness to learn more about drug discovery and how software and AI can improve the process

Bonus Points For 

  • Experience building infrastructure and tooling around AI processes and agents (post-training, MCP servers, skills, automations, harnesses, etc.)
  • Familiarity with robotics/hardware automation (ROS2, path planning, hardware orchestration)
  • Familiarity with our software stack (Postgres, Typescript, React, modern backend and frontend frameworks)
  • Experience with computational chemistry and/or biology
  • Great design sense to build tools with great UX for our researchers

Location & Logistics

  • Visa sponsorship available where applicable. We'll work with you to make it happen.
  • This role will be located at Redwood LIFE in Redwood City, CA, a modern and stunning life sciences complex in the Bay Area.
  • Start date: immediate.
  • We are an equal-opportunity employer and strongly encourage applications from individuals of diverse backgrounds, experiences, and perspectives.

Compensation & benefits

We offer a highly competitive salary, substantial equity, and comprehensive benefits, including medical and dental coverage, company-provided lunch, 401k match, and others.

Apply