42 backend developer intern jobs at 29 companies in California
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Backend Engineering Intern
San Francisco or Istanbul or Ankara
HybridFull Time, Internship
PlusMinusOne: Develops and markets a portfolio of utility and lifestyle apps
0+ YOE3rd/4th-year CS or engineering student with backend interest; hands-on backend experience via coursework/projects/internships; OOP, data structures, algorithms, and Git familiarity; strong analytical and communication skills.
Twelve Labs: AI foundation models for video search and human-like understanding.
Experienced backend engineer with strong Python or Go skills, system design, building zero-to-one internal products, working with large unstructured datasets, and full-stack capability.
TikTok: Global short-form video hosting and social media platform.
Currently pursuing a Bachelors or Masters in CS or related field, able to commit to a 12-week Summer 2026 internship, experience with Python/Java/Golang/C#/C++, strong problem-solving and communication skills.
Backend Development Engineer Intern (Infrastructure Platform Delivery) - 2026 Fall (BS/MS)
San Jose, California, United States
OnsiteInternship
ByteDance: Developing AI-driven content platforms and mobile applications.
Final-year or graduating BS/MS students in CS or related fields; strong coding, data structures and algorithms; proficiency in Java, Go, or C/C++; able to commit 12 weeks in 2026.
Rippling: Unified platform managing workforce HR, IT, and finance operations
Current undergraduate/graduate student in CS or related field, previous software engineering internship experience with Python, backend programming skills, strong communication and critical thinking.
Whova: All-in-one platform for event management and attendee engagement.
Currently enrolled as a junior/senior, master’s, or doctoral student in a computer science/engineering field; strong understanding of data structures, algorithms, and computer systems.
JavaScript, TypeScript, HTML, CSS, REST APIs, Front-end development, Back-end development
Cohere: Provides enterprise-grade large language models and AI software platforms.
Enrolled in a post-secondary program; available for a full-time 3-6 month internship; remote; roles across frontend, backend, full-stack, and infrastructure.
Chasi: AI revenue engine for construction equipment dealers.
1+ YOE1+ internships in production software; full-stack TS/React with backend; experience with LLMs; real-time systems; strong architectural judgment; customer-facing; ownership.
Serval: AI platform for automating IT and enterprise service workflows.
Currently pursuing a technical degree (graduation 2026–2028), strong CS fundamentals, familiarity with a backend language (Go/Java/Python), clear communication, and eagerness to learn in a startup environment.
iHerb: Global e-commerce retailer of health and wellness products.
Pursuing BS/MS in CS or related field; proficiency in C# or Java; backend/API or frontend experience; familiarity with REST, messaging, CI/CD, containers; strong communication and troubleshooting skills.
OpenAI: Develops artificial intelligence models and generative AI software services.
Experienced in building production frontend and backend systems, designing interfaces for operational/internal tools, strong backend fundamentals (APIs, data modeling, integrations), security-conscious design, and cross-functional collaboration.
IAM, ITSM, RBAC, Zero Trust, APIs, SOC 2, ISO 27001, FedRAMP, NIST
Neros Technologies: Designs and manufactures American-made high-performance drones for defense.
8+ YOE8+ years software engineering experience with backend/platform/internal tools work; strong coding, API and integration design, production software delivery, cross-functional collaboration, and onsite factory support.
Broccoli: AI agents for home service business front-office operations.
Strong software engineering fundamentals, production-quality code, full-stack with backend focus, experience building internal tools or growth systems, comfortable in ambiguity and cross-functional work.
Salma Health: Delivers integrated brain health clinical care and diagnostic technology.
3+ YOE3–5 years in software engineering; backend systems and APIs; AWS; multi-language tech; integrations with EHR/CRM; internal tooling; production systems in fast-paced environments.
Boston or Kyiv or Seattle or Lviv or San Francisco
HybridFull Time
DataRobot: Provides an enterprise platform for building and governing AI.
7+ YOE7-10+ years in engineering with 5+ years in infrastructure/platform/backend; Kubernetes internals; Python/Go; multi-cloud or hybrid deployments; IaC; GitOps; strong mentoring and leadership.
Anthropic: Developing safe and reliable artificial intelligence systems.
8+ YOE8+ years building backend systems, data pipelines, or internal platforms; proficiency in Python or Go; experience with cloud platforms and infrastructure-as-code; strong systems thinking and experience with integrations or data infrastructure.
Python, Go, AWS, GCP, Azure, Claude, ServiceNow, Vanta, Drata, OneTrust, REST APIs, webhooks, CI/CD, ELT, ETL, infrastructure-as-code, version control