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55 backend engineer intern jobs at 30 companies in California

1mo
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Backend Engineering Intern
San Francisco or Istanbul or Ankara
HybridFull Time, Internship
PlusMinusOne
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.
Git
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2w
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Staff Backend Engineer, Internal Products
San Francisco, California, United States
$200k-$250k/yr HybridFull Time
Twelve Labs
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.
Python, Go, Claude Code
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2d
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Senior Backend Engineer, AI Platform & Infrastructure
Mountain View, California, United States
$136k-$259k/yr OnsiteFull Time
Unity
UnityNYSE: U: Provides software for creating real-time 3D interactive content.
Experience building production distributed systems, backend services, or internal platforms; strong API and systems engineering; cloud-native infrastructure; access control; CI/CD; infrastructure as code; observability; and interest in LLM agent systems.
GCP, BigQuery, MCP, CI/CD, LLM, infrastructure as code
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1w
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Backend Software Engineer Intern (TikTok-Search) - 2027 Summer
San Jose, California, United States
OnsiteInternship
TikTok
TikTok: Global short-form video hosting and social media platform.
Currently pursuing an undergraduate or master\u0002s degree in CS, CE, or related field; able to commit to a 12-week Summer 2027 internship; strong coding, data structures, algorithms, backend development, problem-solving and teamwork; U.S. work authorization required (no sponsorship).
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3mo
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Software Engineer- Backend Intern (Fall 2026)
San Francisco, California, United States
$29/hr OnsiteInternship
Astranis
Astranis: Builds and operates small geostationary communications satellites.
Pursuing a CS degree; strong Python; databases and pub/sub/streaming experience; open to applicants not matching all criteria.
Python, PostgreSQL, RabbitMQ, Apache Flink, Kubernetes
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1w
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Backend Development Engineer Intern (Infrastructure Platform Delivery) - 2027 Summer
San Jose, California, United States
OnsiteInternship
ByteDance
ByteDance: Developing AI-driven content platforms and mobile applications.
Current undergraduate or master's student in computer science, software engineering, or a related field with strong programming, algorithms, and data structures skills; proficiency in at least one programming language.
Java, Go, C, C++, MySQL, Redis, Linux, TCP/UDP, HTTP
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3mo
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Software Engineer Intern - Backend Focused - Winter 2027
New York or San Francisco or Seattle
OnsiteInternship, Temporary
Rippling
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.
Python, Slack, Microsoft 365
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2mo
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Compiler Engineer — LLVM Backend
Mountain View, California, United States
$180k-$320k/yr OnsiteFull Time
DensityAI
DensityAI: Designing custom AI hardware accelerators for large language models.
5+ YOEExpert LLVM backend internals, 5+ years compiler engineering with LLVM target development, strong computer architecture and ISA design knowledge, debugging compilation correctness and performance; MLIR/GPU/linker experience optional.
LLVM, TableGen, MLIR, Microsoft Excel
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3mo
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Software Engineer Intern (2026 Summer)
San Diego, California, United States
$5k-$7k/mo OnsiteInternship
Whova
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
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3mo
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Software Engineer Intern (Fall / Winter 2026)
San Francisco or Canada
RemoteInternship
Cohere
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.
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1mo
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Software Engineer Intern
San Francisco, California, United States
$11k/mo OnsiteFull Time
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.
Go, gRPC, Kubernetes, React, TypeScript, AWS, Terraform
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2mo
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SWE Intern
San Francisco, California, United States
OnsiteInternship
Chasi
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.
Next.js, TypeScript, PostgreSQL, Redis, Twilio, LiveKit, OpenAI, Anthropic, Deepgram, Vector Databases
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2w
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Platform Engineer (12x Openings)
Palo Alto, California, United States
$225k-$290k/yr HybridFull Time
Volta
Volta: Building and operating GPU-dense infrastructure for AI factories.
3+ YOE3+ years software engineering with infrastructure focus; strong backend/systems programming; deep Kubernetes internals knowledge; Linux and networking fundamentals; production API design; on-call and incident response experience.
Kubernetes, Python, Go, Rust, C++, C#, Java, Linux, BGP, RDMA, Prometheus, Grafana, OpenTelemetry, Ceph, Kopf, controller-runtime
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2mo
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Intern Conversion: Software Developer
Poughkeepsie or Lowell or Durham or Bellevue or San Jose or Dallas
$88k-$152k/yr HybridFull Time, Internship
IBM
IBMNew York Stock Exchange: IBM: Global technology providing enterprise software, cloud, and consulting.
Must be currently enrolled in a Bachelor’s or Master’s in Computer Science or related field, available for an in-person full-time co-op (Jan–Jun 2026). Familiarity with HTML, CSS, JavaScript, React/Angular/Vue, backend tech (Node.js/Java/Python/SQL), Git/IDEs, APIs, containers, and cloud platforms. Must be able to work without visa sponsorship.
HTML, CSS, JavaScript, React, Angular, Vue, Node.js, Java, Python, SQL, Git, IDEs, APIs, IBM Cloud, AWS, Microsoft Azure, Linux, Unix, GO, NodeJS, Eclipse, Microsoft Visual Studio Code, PostgreSQL, MySQL, Db2, Oracle, SQL Server, Jenkins, Puppeteer, Selenium, Playwright, Cypress, Travis, REST API
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1mo
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Software Engineer, Growth
San Francisco, California, United States
OnsiteFull Time
Broccoli
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.
ServiceTitan
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1mo
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Senior Software Engineer (CALC engine) (copy)
Mountain View or San Francisco or Bucharest or Cluj-Napoca or Paris or Munich or London or Pune or Sydney or United States
$220k-$230k/yr RemoteFull Time
Aera Technology: A Decision Intelligence platform building AI-driven decision automation and analytics.
Expert backend Java engineer with low-latency performance, JVM internals, threading and GC knowledge, language/design skills, and experience building high-performance calculation engines.
Java, JVM, Spring, Claude Code
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2mo
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Principal Engineer, Manufacturing Systems
Torrance, California, United States
$100k-$190k/yr OnsiteFull Time
Neros Technologies
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.
MES, ERP, QMS, CRM, WMS, APIs, ETL/ELT, CDC, message queues, RBAC, event-driven systems, integration platforms, barcode scanning
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1mo
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Staff Database Internals Engineer
San Diego or California
RemoteFull Time
Teradata
TeradataNew York Stock Exchange: TDC: Provides cloud data analytics and enterprise AI software platforms.
Experience designing and building distributed control-plane/platform services, strong Kubernetes and cloud-native knowledge, API and orchestration design, identity (OIDC/SAML), backend programming (Go/Java/Python), and big-data platform familiarity.
Kubernetes, OIDC, SAML, Go, Java, Python, DataFusion, Trino, Presto, Spark, eBPF
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5d
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Staff Engineer, Query Optimization
United States or New York City or Dublin or Seattle or Palo Alto or Chicago or North America
$151k-$297k/yr RemoteFull Time
MongoDB
MongoDBNASDAQ: MDB: Cloud-based document database platform for software application development.
10+ YOE10+ years in data management, distributed systems, or backend engineering; production C++ or systems programming experience; database internals expertise; computer science degree or equivalent practical experience.
C++, MongoDB Query Language, AWS, Google Cloud, Microsoft Azure
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2mo
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Software Engineer, Internal Applications - Enterprise
San Francisco, California, United States
$293k-$342k/yr RemoteFull Time
OpenAI
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
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