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Senior Backend Engineer Jobs in California (NOW HIRING)

Casa, Inc

Senior Backend Engineer

San Francisco, CA · On-site

About the role We're hiring a founding Senior Backend Engineer to help us design, develop, and ship robust backend systems that deliver exceptional value to our members. You'll work closely with our ...

Mintlify

Senior Backend Engineer

San Francisco, CA · On-site

$140 - $200/hr

As a Senior Backend Engineer, you'll build the APIs, content pipelines, and AI infrastructure that power Mintlify's products. You'll collaborate across design and engineering, contribute to product ...

FlexAI

Senior Backend Engineer

Santa Clara, CA · On-site

They are seeking a Senior Backend Engineer to architect and develop high-performance backend systems for their AI compute and PaaS platform, working at the intersection of distributed systems and ...

Scribe

Senior Backend Engineer

San Francisco, CA · On-site

$170K - $230K/yr

About the Role We're looking for a Senior Backend Engineer to join our Core Engineering Team, which powers some of the most essential experiences at Scribe: document viewing and editing, embedding ...

Hubs.is

Senior Backend Engineer

San Francisco, CA · On-site +1

About the Role We're looking for a Senior Backend Engineer to lead and enhance the backbone of our AI automation platform. This is a hands-on role with real architectural responsibility - ideal for ...

Troveo AI Inc

Senior Back End Engineer

San Francisco, CA · On-site +1

$175K - $195K/yr

About the Role We are hiring a Senior Backend Software Engineer with deep expertise in building scalable, reliable systems. You will design and operate backend services, with strong expertise in ...

Mochi Health

Senior Backend Engineer

San Francisco, CA · On-site

We are looking for a Senior Backend Engineer to own the core systems that power this scale-from clinical approval workflows and multi-pharmacy fulfillment routing, to complex subscription billing and ...

Mochi Health

Senior Backend Engineer

San Francisco, CA · On-site

We are looking for a Senior Backend Engineer to own the core systems that power this scale--from clinical approval workflows and multi-pharmacy fulfillment routing, to complex subscription billing ...

Mochi Health

Senior Backend Engineer

San Francisco, CA · On-site

We are looking for a Senior Backend Engineer to own the core systems that power this scale-from clinical approval workflows and multi-pharmacy fulfillment routing, to complex subscription billing and ...

Finvest

Senior Backend Engineer

San Francisco, CA · On-site

We are looking for a senior engineer to join our team in San Francisco. As one of the founding ... Design and own the core backend infrastructure, including our multi-agent LLM architecture that ...

Xage Security

Senior Backend Engineer

Palo Alto, CA · On-site

The Senior Backend Engineer will play a crucial role in designing innovative information security products utilizing blockchain technology, ensuring the reliability and robustness of the product ...

Straia, Inc

Senior Backend Engineer

San Francisco, CA · On-site

$200K - $225K/yr

We recently raised our pre-seed from a16z Speedrun , Reach Capital , and JFF Ventures , and are now hiring a Senior Backend Engineer to help build the technical backbone of how institutions interact ...

Xage Security

Senior Backend Engineer

Palo Alto, CA · On-site

The Senior Backend Engineer will design innovative information security products, ensuring their reliability and robustness while championing best practices in system architecture. Responsibilities ...

Matternet

Senior Backend Engineer

Mountain View, CA · On-site

$190K - $240K/yr

We're looking for a Senior Backend Engineer to join the platform team that builds and runs the backend, data, and infrastructure services behind Matternet's delivery network. You'll take ownership of ...

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All JobsBackend Engineer JobsSenior Backend Engineer JobsSenior Backend Engineer Jobs in California

Senior Backend Engineer information

See California salary details

$20.2K

$150.7K

$211.1K

How much do senior backend engineer jobs pay per year?

As of Aug 21, 2026, the average yearly pay for senior backend engineer in California is $150,740.00, according to ZipRecruiter salary data. Most workers in this role earn between $128,100.00 and $176,900.00 per year, depending on experience, location, and employer.

What is a senior backend engineer?

Senior Backend Engineers are experienced software professionals responsible for designing, developing, and maintaining the server-side components of web applications or systems. They work with databases, APIs, and application logic to ensure robust, scalable, and efficient backend operations. Their role often involves collaborating with frontend engineers, managing system architecture, reviewing code, and mentoring junior developers. Senior Backend Engineers also play a key role in optimizing performance, ensuring security, and integrating new technologies into existing systems.

What are some common challenges senior backend engineers face when scaling backend systems, and how are they typically addressed?

Senior Backend Engineers often encounter challenges related to system scalability, such as database bottlenecks, latency issues, and maintaining system reliability under increased load. Addressing these challenges typically involves optimizing database queries, implementing caching strategies, and designing microservices architectures to distribute workloads efficiently. Collaboration with DevOps and frontend teams is also crucial to ensure seamless integration and monitoring. Proactively identifying potential scalability issues and participating in code reviews are key responsibilities in this role.

What are the key skills and qualifications needed to thrive as a senior backend engineer, and why are they important?

To thrive as a Senior Backend Engineer, you need advanced proficiency in server-side programming languages (such as Java, Python, or Node.js), database management, and experience with scalable system architecture, typically supported by a relevant degree and several years of professional experience. Familiarity with frameworks, APIs, containerization tools (like Docker and Kubernetes), and cloud platforms (such as AWS or Azure) is essential, along with knowledge of version control systems like Git. Strong problem-solving abilities, effective communication, and mentorship skills help you collaborate across teams and guide junior developers. These skills ensure the delivery of robust, efficient, and maintainable backend systems that support business objectives and seamless user experiences.

How much does a senior backend engineer make?

A senior backend engineer's salary typically ranges from $100,000 to $160,000 annually, depending on experience, location, and company size. They often have expertise in programming languages like Java, Python, or Node.js and may receive additional compensation through bonuses or stock options.

What are the most commonly searched types of Backend Engineer jobs in California?

The most popular types of Backend Engineer jobs in California are:

What cities in California are hiring for Senior Backend Engineer jobs?

Cities in California with the most Senior Backend Engineer job openings:

Senior Backend Engineer jobs near you
Infographic showing various Senior Backend Engineer job openings in California as of August 2026, with employment types broken down into 95% Full Time, 2% Part Time, and 3% Contract. Highlights an 85% Physical, 6% Hybrid, and 9% Remote job distribution, with an average salary of $150,740 per year, or $72.5 per hour.

Senior Backend Engineer

Casa, Inc

San Francisco, CA • On-site

Full-time

Re-posted 2 days ago

Job description

About Casa
We believe owning a home should feel as special as the moments that take place within them. If our mission inspires you, we'd love to hear from you.
About the role
We're hiring a founding Senior Backend Engineer to help us design, develop, and ship robust backend systems that deliver exceptional value to our members.
You'll work closely with our founders, fellow engineers, and designers to create thoughtful and groundbreaking products that deliver exceptional value to our members. You'll help build our core systems and product and define much of our founding team culture.
Some of the responsibilities you'll have
  • Lead the architecture and development of our backend systems, ensuring they are scalable, secure, and reliable
  • Design and implement APIs that power our iOS applications and other client interfaces
  • Optimize performance and scalability of our services to handle a growing number of members and data
  • Stay current with the latest advancements in backend technologies and cloud infrastructure, and integrate new technologies and methodologies as appropriate
  • Level up a growing engineering team by reviewing code and designs of teammates and providing constructive feedback to maintain high quality

About you
  • You're passionate about building robust systems. You have a deep understanding of backend architecture, API design, and database management, and you're excited to build systems that scale with our growing member base
  • You're excited to be a founding engineer at an early-stage startup. This means that there's a lot of systems and structure yet to be put in place, and you'll play an active role in building and shaping those alongside our company culture
  • You're excited to build. You embrace the challenges and growth that come with joining an early-stage company, thriving in a fast-moving, evolving environment
  • You think and act like an owner. You take a long-term view, make decisions with care, and are eager to take initiative and responsibility with good judgment
  • You roll up your sleeves. You find satisfaction in taking action, solving problems, and learning quickly, rather than delegating or managing from the sidelines
  • You're mission-driven and adaptable. You understand the stakes of a startup, focus on what matters most, and dedicate yourself to building for long-term success
  • You thrive on collaboration and problem-solving. You work best in an in-person culture, feeding off shared energy, brainstorming, and engaging with others daily

Apply