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Founding Full Stack Engineer Jobs in Castro Valley, CA

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 ...

Weekday

Founding Full-Stack Engineer

San Francisco, CA · On-site

Early hire / founding engineer Why This Role Exists You'll help build the core product from the ground up. This is a hands-on role for someone who loves shipping, thrives in ambiguity, and wants ...

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 ...

Truth Systems

Founding Full-Stack Engineer

San Francisco, CA · On-site

$120K - $250K/yr

... full cycle, from idea/client discovery to rollout. Feature outcomes are measured via adoption and direct client feedback. * Reliable, secure, accurate, and fast engineering: With the stakes that we ...

Fabrion

Founding Engineer

San Francisco, CA · On-site

$152K/yr

They are seeking a founding full stack engineer to architect and build the platform from day one, with significant ownership over core architecture and early team culture. Responsibilities : • ...

Noso Labs Inc.

Full Stack Engineer

San Francisco, CA · On-site

$153 - $207/hr

Above market pay The Role As Founding Software Engineer, you will be our first full-time engineer ... Build full-stack features across our React Native mobile frontend and Python backend, from idea to ...

Nexusflow.ai, Inc.

Full-Stack Engineer

Palo Alto, CA

Full-Stack Engineer Nexusflow is currently adding Full-Stack Engineers to our team. Our full-stack engineers are responsible for packaging up our technology in models and last-mile quality toolings ...

Readily

Senior Full-Stack Engineer

San Francisco, CA · On-site

They are looking for a Senior Full-Stack Engineer to join their founding team, where the candidate will take ownership of projects from customer discovery to product launch, directly impacting the ...

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All JobsFounding Full Stack Engineer JobsFounding Full Stack Engineer Jobs in Castro Valley, CA

Founding Full Stack Engineer information

See Castro Valley, CA salary details

$51.4K

$155.5K

$219.8K

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

As of Aug 23, 2026, the average yearly pay for founding full stack engineer in Castro Valley, CA is $155,515.00, according to ZipRecruiter salary data. Most workers in this role earn between $128,100.00 and $182,300.00 per year, depending on experience, location, and employer.

What is a founding full stack engineer?

A Founding Full Stack Engineer is an early, core technical team member at a startup who is responsible for building both the front-end and back-end of the company's product. This role goes beyond typical engineering, often involving product decisions, architecture design, and collaborating directly with the founders. Founding Full Stack Engineers help shape the company's culture, technical direction, and can have significant equity stake. Their work is crucial in taking the business from idea to launch, often in a fast-paced, resource-limited environment.

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

To thrive as a Founding Full Stack Engineer, you need expertise in both front-end and back-end development, deep knowledge of programming languages like JavaScript, Python, or Ruby, and experience with scalable architectures, often backed by a degree in computer science or equivalent experience. Familiarity with frameworks (React, Node.js, Django), version control systems (Git), cloud platforms (AWS, GCP), and DevOps practices is typically required. Strong problem-solving, initiative, adaptability, and excellent communication distinguish successful candidates, enabling effective collaboration in a startup environment. These skills and qualities are crucial for building robust products rapidly and influencing the company's technical direction from its early stages.

What unique challenges might a founding full stack engineer face when joining an early-stage startup?

As a Founding Full Stack Engineer at an early-stage startup, you'll often balance building core product features with setting up foundational technical infrastructure. This role typically requires wearing multiple hats, from architecting systems and writing code to making critical technology decisions and collaborating closely with non-technical founders. You may encounter challenges such as ambiguous requirements, shifting priorities, and limited resources, but you'll also have significant influence over the company's technical direction. The dynamic environment encourages rapid learning and offers accelerated career growth, particularly for those who thrive in fast-paced, collaborative settings.

What is the difference between Founding Full Stack Engineer vs Full Stack Engineer?

AspectFounding Full Stack EngineerFull Stack Engineer
CredentialsTypically requires proven full stack development experience, sometimes with startup or early-stage company involvementRequires relevant full stack development skills, often with formal education or certifications
Work EnvironmentEarly-stage startups or founding teams, often wearing multiple hatsEstablished companies or startups, focused on project delivery
Employer & Industry UsageFounding teams, startups, tech entrepreneursTech companies, agencies, startups, corporate IT teams

Founding Full Stack Engineers are key players in early-stage startups, often involved in building core products from scratch and shaping company technology. Full Stack Engineers work across various company sizes, focusing on developing and maintaining applications. The main difference lies in the startup environment and level of involvement in founding the company.

What job categories do people searching Founding Full Stack Engineer jobs in Castro Valley, CA look for?

The top searched job categories for Founding Full Stack Engineer jobs in Castro Valley, CA are:

What cities near Castro Valley, CA are hiring for Founding Full Stack Engineer jobs?

Cities near Castro Valley, CA with the most Founding Full Stack Engineer job openings:

Founding Full Stack Engineer jobs near you
Infographic showing various Founding Full Stack Engineer job openings in Castro Valley, CA as of August 2026, with employment types broken down into 91% Full Time, 6% Part Time, and 3% Contract. Highlights an 85% Physical, 6% Hybrid, and 9% Remote job distribution, with an average salary of $155,515 per year, or $74.8 per hour.

Founding Full Stack Engineer

Fennel AI

Menlo Park, CA • On-site

Full-time

Re-posted 2 days ago

Job description

Building the modern, human-centric recommendation systems
Whether it is recommending videos to watch on TikTok, things to buy on Amazon, or people to date on Tinder, recommendation engines are the drivers of the modern digital economy. However, the technology to power these recommendations has only been available to a select few big tech companies so far. We are on a mission to enable all companies in the world to harness this technology and build delightful products for their customers.
And we are looking for our first product engineer to shape and build our core product. You will be working shoulder-to-shoulder with co-founders and a small team of 3-5 people. You will own a massive surface area and have a huge impact on the company.
What we are looking for
  • An entrepreneurial mindset with deep care for solving customer problems
  • 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 experience of machine learning or infrastructure is not required

What to expect
  • Meaningful Work: Your team directly enables and accelerates the innovation of data science, machine learning, and artificial intelligence.
  • Impact: You will shape the future of an industry and your work will power thousands of companies' products for hundreds of millions of people
  • Freedom & Responsibility: We know better than to pigeonhole great people into narrow roles. You will be able to use your judgement to make the company better as you see fit without permission.
  • Inclusivity: We embrace different backgrounds, perspectives, and styles because it helps us make better decisions.
  • Stunning Colleagues & Top-of-Market Compensation: You will be part of a high-performance team.

We encourage people from all backgrounds to apply. We are well funded and backed by top-tier venture capital firms and some of the most prominent leaders in the tech industry.

Apply