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Backend Developer Intern Jobs in California (NOW HIRING)

Cheiron

Agent Engineering Intern

Los Altos, CA · On-site

$35 - $55/hr

About the Role We're looking for an Agent Engineering Intern to build new agent-driven workflows ... developer tool, backend system, or open-source contribution. * Hands-on experience building a ...

barkback, llc

Software Intern

Santa Barbara, CA · On-site

... backend systems and databases. You'll get to work closely with our web developers and product teams to bring new product features to life as well as make the existing product even more amazing. Being ...

Barkback, Llc

Software Intern

Santa Barbara, CA · On-site

... backend systems and databases. You'll get to work closely with our web developers and product teams to bring new product features to life as well as make the existing product even more amazing. Being ...

Cheiron

Agent Engineering Intern

Los Altos, CA · On-site

$35 - $55/hr

About the Role We're looking for an Agent Engineering Intern to build new agent-driven workflows ... developer tool, backend system, or open-source contribution. * Hands-on experience building a ...

Xpansiv

QA Intern

San Jose, CA · On-site

$30 - $35/hr

... validate backend APIs and web user interface functionality. This internship offers hands-on ... Collaborate with Product Management, QA, and Engineering teams to support the design and ...

Xpansiv

QA Intern

San Jose, CA

$30 - $35/hr

... validate backend APIs and web user interface functionality. This internship offers hands-on ... Collaborate with Product Management, QA, and Engineering teams to support the design and ...

Xpansiv

QA Intern

San Jose, CA

$30 - $35/hr

... validate backend APIs and web user interface functionality. This internship offers hands-on ... Collaborate with Product Management, QA, and Engineering teams to support the design and ...

Hadrian Automation

Robotics Engineer Intern

Torrance, CA · On-site

$46.15 - $50.71/hr

Contribute to backend services, APIs, and data pipelines used across engineering, operations, and ... An intern's hourly rate within this range will be based on several factors, including, but not ...

Multicoin

Robotics Engineer Intern

Los Angeles, CA · On-site

$46.15 - $50.71/hr

Contribute to backend services, APIs, and data pipelines used across engineering, operations, and ... An intern's hourly rate within this range will be based on several factors, including, but not ...

New

Hadrian Automation

Robotics Engineer Intern

Los Angeles, CA · On-site

$46.15 - $50.71/hr

Contribute to backend services, APIs, and data pipelines used across engineering, operations, and ... An intern's hourly rate within this range will be based on several factors, including, but not ...

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All JobsBackend Developer Intern JobsBackend Developer Intern Jobs in California

Backend Developer Intern information

See California salary details

$11

$56

$83

How much do backend developer intern jobs pay per hour?

As of Sep 11, 2026, the average hourly pay for backend developer intern in California is $56.98, according to ZipRecruiter salary data. Most workers in this role earn between $46.73 and $67.36 per hour, depending on experience, location, and employer.

What is a backend developer intern?

A Backend Developer Intern is an entry-level role where you assist in building and maintaining the server-side logic of web applications. You will work with databases, APIs, and backend frameworks to ensure efficient data processing and system functionality. Typical tasks include writing and testing code, debugging issues, and collaborating with frontend developers to integrate services. This internship helps you gain hands-on experience in software development and understand industry best practices.

What do backend developer interns do?

As a Backend Developer Intern, you can expect to work on tasks such as developing and maintaining server-side logic, building and integrating APIs, troubleshooting bugs, and collaborating with frontend teams to deliver seamless features. Interns often contribute to real production code under the guidance of senior developers and participate in code reviews, team meetings, and regular stand-ups. You'll gain hands-on experience with industry-standard tools and workflows while learning best practices for clean, efficient code. This immersive exposure helps you build a foundational skill set and prepares you for more advanced development roles in the future.

What skills and qualifications are needed to be a backend developer intern?

To thrive as a Backend Developer Intern, you need a solid understanding of programming languages like Java, Python, or Node.js, as well as basic knowledge of databases and data structures, typically gained through coursework or personal projects. Familiarity with version control systems (such as Git), RESTful APIs, and frameworks like Django or Express is commonly required. Strong problem-solving skills, effective communication, and the ability to work collaboratively stand out in this role. These competencies are crucial for efficiently contributing to backend development tasks, integrating with team members, and learning quickly in a fast-paced tech environment.

Are backend developer interns still in demand?

Backend developer internships remain in demand as companies continue to develop and maintain web applications and services. Interns with skills in programming languages like Python, Java, or Node.js, and familiarity with databases and APIs, are sought after to support software development teams. The demand can vary based on industry trends and regional job markets.

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

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

What are popular job titles related to Backend Developer Intern jobs in California?

For Backend Developer Intern jobs in California, the most frequently searched job titles are:

What job categories do people searching Backend Developer Intern jobs in California look for?

The top searched job categories for Backend Developer Intern jobs in California are:

What cities in California are hiring for Backend Developer Intern jobs?

Cities in California with the most Backend Developer Intern job openings:

Backend Developer Intern jobs near you
Infographic showing various Backend Developer Intern job openings in California as of August 2026, with employment types broken down into 79% Full Time, 8% Part Time, and 13% Contract. Highlights an 81% Physical, 5% Hybrid, and 14% Remote job distribution, with an average salary of $118,514 per year, or $57 per hour.

Agent Engineering Intern

Los Altos, CA • On-site

Cheiron
Business Management Consulting • 51 - 200 employees
Learn more about Cheironexternal

$35 - $55/hr

Full-time, Internship

Posted 9 days ago

Job description

Los Altos, CA • Engineering • Internship • Semester/quarter or summer • Fully in-person
Company Overview
Cheiron recently raised an $8M seed round led by Menlo Ventures, and now has $13M total raised. The round also included strategic support from Moderna co-founder Robert Langer, former Pfizer Chief Medical Officer Freda Lewis-Hall, Chai Discovery co-founder and CEO Josh Meier, former Starbucks CEO Laxman Narasimhan, and former Apple AI chief John Giannandrea.
Cheiron is building the first AI-native operating system designed to represent an entire drug program as a single connected system. The platform helps biopharma teams represent, reason over, and stress-test the claims, evidence, decisions, and commitments, driving the drug program to completion.
About the Role
We're looking for an Agent Engineering Intern to build new agent-driven workflows inside Cheiron's product.
Cheiron's agents do more than generate an answer. They break complex objectives into steps, retrieve evidence, call tools, maintain state across long-running work, recover from failures, and produce structured results that a person can review and trust. You will own a bounded workflow and help take it from an ambiguous problem to a reliable, working product.
This is an Applied Engineering Role. We care about strong software fundamentals, hands-on ownership, and evidence that you have built nontrivial systems yourself. The role is best suited to undergraduate and master's students who are already serious builders.
What You'll Do
  • Design and implement new agent workflows with explicit state, task decomposition, tool use, and typed outputs.
  • Build retrieval and citation paths that ground important outputs in source evidence.
  • Add evaluation, tracing, retries, observability, and recovery behavior for multi-step execution.
  • Build the backend services, data models, APIs, and focused product surfaces required to make the workflow useful.
  • Test agent behavior against realistic success cases, failure cases, and incomplete evidence.
  • Work directly with engineers and domain experts, demonstrate progress frequently, and make pragmatic scope decisions.

Requirements
  • Currently pursuing an undergraduate or master's degree in computer science, computer engineering, or a related technical field.
  • Strong programming fundamentals and experience building a substantial software project, developer tool, backend system, or open-source contribution.
  • Hands-on experience building a nontrivial agent, retrieval system, tool-using workflow, evaluation harness, or multi-step automation system.
  • Clear personal ownership of the work: you can explain what you implemented, the decisions you made, and what you would improve.
  • Ability to reason about state, failure modes, grounding, evaluation, and engineering tradeoffs-not only prompts and model selection.
  • High agency and comfort working through ambiguous problems in a fast-moving environment.
  • Ability to work fully in person in Los Altos. Semester or quarter interns must commit at least 20 hours per week; summer interns should be available full time.

Nice to Have
  • Experience with Python, FastAPI, Postgres, agent frameworks, retrieval systems, or vector databases.
  • Backend, distributed-systems, infrastructure, data-pipeline, or end-to-end product experience.
  • Experience with tests, deployment, observability, security, or reliable failure handling.
  • Experience building systems involving citations, provenance, human review, or other high-stakes correctness requirements.
  • Strong open-source work, prior software-engineering internships, or an independently shipped product with real users.

Compensation
$35-$55 per hour. Exact compensation within the range depends on demonstrated expertise, relevant experience, and the time the student can commit.
Location, Relocation & Visa
This role is fully in person in Los Altos, CA. Academic-term interns must be able to work from the office at least 20 hours per week; summer interns should expect a full-time commitment. Relocation assistance may be offered selectively to a strong candidate and is not guaranteed. Candidates of any nationality or visa status may be considered when the internship can be employed legally.
Interview Process
Semester/quarter route:
  • 30-minute introductory call → one-day onsite in Los Altos → decision.

Summer route:
  • 15-minute introductory call → take-home assignment → take-home interview → interview with Backend Team → decision.
  • For some summer candidates, the final two interviews may instead be combined into a one-day onsite in Los Altos.

Equal Opportunity & Accommodation
Cheiron is an equal-opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status, or any other characteristic protected by law.

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