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Full Time Software Engineer Startup Jobs in California

We are hiring on behalf of a venture-backed AI startup building intelligent software that automates ... Its engineering team is small, product-oriented, and responsible for taking ideas from early ...

We are hiring on behalf of a venture-backed AI startup building intelligent software that automates ... Its engineering team is small, product-oriented, and responsible for taking ideas from early ...

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.

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.

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.

About the Role A well-funded, seed-stage B2B SaaS startup in the supply chain integrations space is looking for a Founding Software Engineer to help shape the architecture, culture, and product ...

Senior Software Engineer

San Francisco, CA

$144K - $190K/yr

San Francisco, CA (required 5 days/week in-office) Type: Full-Time Compensation: $150,000-$300,000 ... S taff-level or quickly promoted engineer at a startup or AI-first company * F ormer founder or ...

Senior Software Engineer

San Francisco, CA · On-site

$144K - $190K/yr

San Francisco, CA (required 5 days/week in-office) Type: Full-Time Compensation: $150,000-$300,000 ... startup or top AI company (e.g., Stripe, Ramp, OpenAI, Anthropic) - Strong backend or full-stack ...

Senior Software Engineer Location: San Francisco (hybrid, 3 days in-office; NYC option depending on ... Full-Time Priority: High About the Company The Company is a small, fast-paced startup in the ...

About the Role A well-funded, seed-stage B2B SaaS startup in the supply chain integrations space is looking for a Founding Software Engineer to help shape the architecture, culture, and product ...

Senior Software Engineer Location: San Francisco (hybrid, 3 days in-office; NYC option depending on ... Full-Time Priority: High About the Company The Company is a small, fast-paced startup in the ...

They are seeking Software Engineers who are passionate about space exploration and responsible for ... Startup & Agile software development methodologies is a plus Company : Epsilon3 is the OS for ...

Software Engineer

Huntington Beach, CA · On-site

$130K - $200K/yr

We're not just another composites shop-we're a technology-first manufacturing startup building the ... We are looking for highly motivated Software Engineers to join our team as key members of our ...

We're not just another composites shop-we're a technology-first manufacturing startup building the ... We are looking for highly motivated Software Engineers to join our team as key members of our ...

We're not just another composites shop--we're a technology-first manufacturing startup building the ... We are looking for highly motivated Software Engineers to join our team as key members of our ...

... rapidly-growing startup, bringing the most innovative tech to the HVAC industry. Key ... Previous experience in software development, computer engineering, or other related fields

Senior Software Engineer

San Francisco, CA · On-site +1

$127K - $172K/yr

Our team-driven culture and rapid growth have earned us recognition as one of Forbes' Top Startup ... Benefits For full time employees, Tendo also offers full health benefits (medical, dental, and ...

Preferred background * 5+ years of full-time software engineering experience, preferably at a trading firm, tech company, or high-growth startup. * Strong proficiency in C/C++ or Rust. * Knowledge of ...

Senior Software Engineer

San Diego, CA · On-site

$117K - $158K/yr

Our team-driven culture and rapid growth have earned us recognition as one of Forbes' Top Startup ... Benefits For full time employees, Tendo also offers full health benefits (medical, dental, and ...

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Full Time Software Engineer Startup information

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 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 are the key skills and qualifications needed to thrive as a Full Time Software Engineer at a startup, and why are they important?

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 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:
Infographic showing various Full Time Software Engineer Startup job openings in California as of July 2026, with employment types broken down into 92% Full Time, 4% Part Time, 1% Temporary, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution.
Software Engineer

Software Engineer

ProNexus

San Francisco, CA • On-site

Full-time

Re-posted 28 days ago


Job description

We are hiring on behalf of a venture-backed AI startup building intelligent software that automates business workflows.
The company combines large language models, proprietary data, and human-in-the-loop systems to help customers complete high-value work faster and more accurately. Its engineering team is small, product-oriented, and responsible for taking ideas from early customer conversations through production.
About the role
As a Fullstack Software Engineer, you will own meaningful parts of the product from design through deployment.
You might build a new React workflow one week, develop a Python service the next, and then work directly with customers to improve how an AI agent performs in production.
This role is best suited to an engineer who enjoys moving across the stack, making product decisions, and shipping quickly in an early-stage environment.
What you'll do
  • Build and launch customer-facing AI product features
  • Develop modern web applications using React and TypeScript
  • Build backend services and APIs using Python and TypeScript
  • Design relational data models using PostgreSQL
  • Integrate large language models, third-party APIs, and customer data sources
  • Deploy and operate production services using AWS
  • Improve application performance, reliability, observability, and security
  • Work closely with founders, product leaders, designers, and customers
  • Own projects from initial problem definition through production
  • Help establish engineering standards as the team grows
What we're looking for
  • Approximately 1-9 years of professional software engineering experience
  • Strong production experience with Python, TypeScript, or both
  • Experience building web applications with React or NextJS
  • Experience developing APIs, backend services, and database-backed applications
  • Familiarity with PostgreSQL or another relational database
  • A track record of independently shipping meaningful product features
  • Strong product judgment and attention to user experience
  • Comfort working across multiple layers of a technical system
  • Ability to operate effectively in a fast-moving and sometimes ambiguous environment
  • Clear written and verbal communication

Equivalent experience matters more than a specific number of years.
Nice to have
  • Experience building AI, LLM, agent, or machine-learning products
  • Experience with AWS, GCP, Docker, Kubernetes, or Terraform
  • Familiarity with LLM evaluations, retrieval, prompting, or observability
  • Previous experience at an early-stage or venture-backed startup
  • Experience owning a product or technical area with limited supervision
Why join
  • Build production AI products used by real customers
  • Work on problems that span product, engineering, data, and AI
  • Have significant ownership over what gets built and how
  • Work directly with company leadership and customers
  • Join an early team where individual contributions have visible impact
  • Receive a competitive salary and meaningful equity