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Internship Backend Python Jobs in California (NOW HIRING)

Phonely Ltd

Software Engineer Intern

San Francisco, CA · On-site

Software Engineer Internship This is a high-impact internship where you'll write real code, ship ... Experience with backend development (Python or Node.js) * Familiarity with cloud platforms (AWS ...

ThunderSoft

CA · On-site

Design and implement backend services and APIs to support AI applications and model integrations ... Strong programming skills in Python and familiarity with at least one additional programming ...

New

D3

Backend Engineer - New Grad

Los Angeles, CA

... internships, projects, or open-source contributions count). * Familiarity with at least one backend programming language (e.g., JavaScript/Node.js, Python, or similar). * Basic knowledge of databases ...

D3

Backend Engineer - New Grad

Los Angeles, CA · On-site

... internships, projects, or open-source contributions count). * Familiarity with at least one backend programming language (e.g., JavaScript/Node.js, Python, or similar). * Basic knowledge of databases ...

D3

Backend Engineer - New Grad

Los Angeles, CA

... internships, projects, or open-source contributions count). * Familiarity with at least one backend programming language (e.g., JavaScript/Node.js, Python, or similar). * Basic knowledge of databases ...

MongoDB

Senior Python Engineer

Ontario, CA

$123K - $166K/yr

Enjoy collaborating with teammates, and mentoring junior engineers and interns * Are self-motivated ... PyMongo, Django MongoDB Backend, PyMongoArrow, LangChain MongoDB) and related software ...

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Infographic showing various Internship Backend Python job openings in California as of June 2026, with employment types broken down into 5% Internship, 2% As Needed, 82% Full Time, 4% Part Time, 1% Temporary, and 6% Contract. Highlights an 90% Physical, 1% Hybrid, and 9% Remote job distribution.

Software Engineer Intern

Phonely Ltd

San Francisco, CA • On-site

Full-time

Re-posted 27 days ago

Job description

Software Engineer Internship
This is a high-impact internship where you'll write real code, ship features, and see your work in production.
Note: This is an in-office role, 5 days a week in San Francisco.
What You'll Do
  • Investigate and troubleshoot real customer issues across frontend and backend systems
  • Work closely with customers and internal teams to diagnose bugs, performance bottlenecks, and reliability problems
  • Build internal tooling and dashboards to improve debugging, monitoring, and operational workflows
  • Help monitor production systems and support incident response efforts
  • Assist engineers in identifying root causes and shipping fixes quickly
  • Build and maintain components for high-performance web applications using React and Next.js
  • Collaborate with engineers to integrate APIs, real-time systems, and observability tooling
  • Improve UI/UX by building responsive and user-friendly interfaces
  • Support performance optimization efforts across rendering, caching, and latency
  • Write clean, maintainable, and well-documented code
  • Participate in code reviews, team discussions, and product development

Qualifications
  • Currently pursuing or recently completed a degree in Computer Science or related field
  • Experience with JavaScript/TypeScript and modern frontend frameworks (React preferred)
  • Familiarity with Next.js or willingness to learn quickly
  • Strong problem-solving and debugging skills
  • Comfortable investigating technical issues and working through ambiguous problems
  • Basic understanding of APIs, async programming, and web fundamentals
  • Exposure to full-stack development through projects, coursework, or internships
  • Strong communication skills and ability to work directly with customers and teammates
  • Eagerness to learn quickly in a fast-paced environment

Nice to Have
  • Experience with backend development (Python or Node.js)
  • Familiarity with cloud platforms (AWS, GCP)
  • Experience with observability or monitoring tools
  • Familiarity with databases (Firebase, Supabase, or similar)
  • Interest in AI, real-time systems, infrastructure, or voice technologies

What You'll Gain
  • Real-world experience debugging and operating production systems
  • Hands-on exposure to customer-facing engineering and issue investigation
  • Mentorship from experienced engineers
  • Experience working with modern infrastructure, observability, and AI systems
  • Opportunity to make meaningful contributions to a fast-growing company

Our Tech Stack
  • Frontend: React, Next.js, TypeScript
  • Backend: Python, microservices, async systems
  • Cloud & Infra: AWS, GCP, Kubernetes, Redis
  • Databases: Firebase, Supabase
  • Observability: Datadog, logging, metrics, tracing

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