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Junior Developer Startup Jobs in California (NOW HIRING)

... team. • Mentor junior engineers and contribute to a culture of technical excellence ... Typescript, GRPC, Go, Kubernetes, React, AWS and Terraform. • Early-stage experience at a startup ...

Senior GenAI Engineer (Python)

Palo Alto, CA · On-site

$142K - $192K/yr

About Us: We are an innovative AI startup focused on transforming professional services through ... As a Senior GenAI Developer, you will lead the design, development, and deployment of scalable ...

Senior GenAI Engineer (Python)

Palo Alto, CA · Hybrid

$142K - $192K/yr

About Us: We are an innovative AI startup focused on transforming professional services through ... As a Senior GenAI Developer, you will lead the design, development, and deployment of scalable ...

Senior Battery Engineer

Los Angeles, CA · On-site

$180K - $220K/yr

Mentor junior engineers as the engineering organization continues to grow. Required Qualifications ... Startup product development * R&D through production launches * SBIR or government-funded ...

Control Engineer

San Diego, CA · On-site

$88K - $114K/yr

You should be comfortable leading or supporting technical teams, mentoring junior engineers, and traveling to customer sites for startup and troubleshooting activities. Reasons you will be excited to ...

Control Engineer

San Diego, CA · On-site

$88K - $114K/yr

You should be comfortable leading or supporting technical teams, mentoring junior engineers, and traveling to customer sites for startup and troubleshooting activities. Reasons you will be excited to ...

Senior Software Engineer

San Francisco, CA · On-site

$144K - $190K/yr

... developer experience, and performance - Mentor junior engineers and help shape engineering best practices Requirements - 4-8 years engineering experience at a high-growth startup or top AI company (e ...

About the Role We're a fast-growing consumer fintech startup building financial products that help ... Provide mentorship and technical guidance to junior engineers on the mobile team What We're Looking ...

Senior Software Engineer

San Francisco, CA · On-site

$144K - $190K/yr

... developer experience, and performance * M entor junior engineers and help shape engineering best practices --- Requirements * 4 -8 years engineering experience at a high-growth startup or top AI ...

About the Role We're a fast-growing consumer fintech startup building financial products that help ... Provide mentorship and technical guidance to junior engineers on the mobile team What We're Looking ...

Showing results 21-40

Junior Developer Startup information

See California salary details

$23.7K

$87.8K

$135.7K

How much do junior developer startup jobs pay per year?

As of Jul 26, 2026, the average yearly pay for junior developer startup in California is $87,810.00, according to ZipRecruiter salary data. Most workers in this role earn between $66,100.00 and $85,900.00 per year, depending on experience, location, and employer.

What is a Junior Developer Startup job?

A Junior Developer Startup job involves working as an entry-level software developer in a fast-paced startup environment. You'll likely assist in coding, debugging, and testing software while collaborating with a small team. Startups often require developers to be adaptable, learn quickly, and take on various responsibilities beyond coding. This role provides great exposure to modern technologies and agile development practices. It’s a valuable opportunity to grow your skills and gain hands-on experience in a dynamic setting.

What are the key skills and qualifications needed to thrive in the Junior Developer Startup position, and why are they important?

To thrive as a Junior Developer at a startup, you need foundational knowledge of programming languages (such as JavaScript, Python, or Ruby), basic understanding of web development, and a degree in computer science or related experience. Familiarity with source control systems like Git, cloud services, and popular frameworks is important, and participation in coding bootcamps or relevant certifications is a plus. Strong problem-solving, adaptability, and effective communication are key soft skills for collaborating in a dynamic, fast-paced environment. These abilities help junior developers quickly learn, contribute to product development, and grow within the rapidly evolving startup landscape.

What are some common challenges a Junior Developer may face when working at a startup?

Junior Developers in startup environments often encounter rapid changes in project direction, shifting priorities, and the need to learn new technologies quickly. Unlike more established companies, startups may have less formalized onboarding and training, requiring you to take initiative and learn on the go. You'll likely collaborate closely with small, cross-functional teams, which means communication skills and flexibility are essential. Embracing these challenges can accelerate your growth, expand your technical skill set, and offer opportunities to make a direct, visible impact on the company's products.

What are the most commonly searched types of Developer Startup jobs in California? The most popular types of Developer Startup jobs in California are:
What cities in California are hiring for Junior Developer Startup jobs? Cities in California with the most Junior Developer Startup job openings:
Infographic showing various Junior Developer Startup job openings in California as of July 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution, with an average salary of $87,810 per year, or $42.2 per hour.

Software Engineer, Frontend

Serval

San Francisco, CA • On-site

Full-time

Posted 4 days ago


Job description

Job Summary:
Serval is an AI-native automation platform transforming how enterprises operate. As a Senior Frontend Engineer, you'll play a pivotal role in shaping the future of our platform by building foundational parts of our technology and ensuring an outstanding user experience.
Responsibilities:
• Work closely with our CTO to build new product capabilities from the ground up.
• Be a champion for user experience, incorporating a deep understanding of our users to guide design decisions alongside the founding team.
• Set the foundational system architecture and select key technologies for the codebase.
• Help us ship V1 of Serval and deliver on our technical and product roadmap.
• Help establish engineering best practices and standards within the team.
• Mentor junior engineers and contribute to a culture of technical excellence.
Qualifications:
Required:
• 4+ years of experience as a frontend focused software engineer.
• Experience with zero-to-one development: You should have built new products or systems from the ground up.
• Deep appreciation for and commitment to delivering outstanding user experiences.
• Exceptional communication skills and a proven ability to work cross-functionally.
• Comfortable with the pace and ambiguity of a fast-growing startup environment.
• Degree in Computer Science or a related engineering field.
Preferred:
• Experience with some of the technologies in our stack: Typescript, GRPC, Go, Kubernetes, React, AWS and Terraform.
• Early-stage experience at a startup.
• Experience building applied AI products.
Company:
Serval provides an AI-native IT service management platform that automates routine tasks and streamlines help desk requests. Founded in 2024, the company is headquartered in San Francisco, USA, with a team of 51-200 employees. The company is currently Growth Stage.