20 backend software intern jobs at 17 companies in Fairfax, CA
2mo
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Backend Engineering Intern
San Francisco or Istanbul or Ankara
HybridFull Time, Internship
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
3w
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Staff Backend Engineer, Internal Products
San Francisco, California, United States
$200k-$250k/yr HybridFull Time
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
3mo
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Software Engineer Intern (Fall / Winter 2026)
San Francisco or Canada
RemoteInternship
Enrolled in a post-secondary program; available for a full-time 3-6 month internship; remote; roles across frontend, backend, full-stack, and infrastructure.
3mo
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SWE Intern
San Francisco, California, United States
OnsiteInternship
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
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
2mo
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Compiler Engineer — LLVM Backend
Mountain View, California, United States
$180k-$320k/yr OnsiteFull Time
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
1mo
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Software Engineer, Growth
San Francisco, California, United States
OnsiteFull Time
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
5d
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Software Engineer, Plugin Developer Platform
San Francisco, California, United States
$185k-$490k/yr HybridFull Time
Experience building developer-facing software such as APIs, SDKs, platforms, internal tools, or open-source projects; strong API design, communication, product judgment, and backend and web development skills.
APIs, SDKs, ChatGPT, Codex, Model Context Protocol (MCP)
3mo
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Machine Learning Software Engineer Intern - Winter 2027
San Francisco or New York City
HybridInternship, Temporary
Currently enrolled in an M.Sc. or Ph.D. in computer science or related field; strong backend programming skills (Python, PySpark, PyTorch); ML experience, LLM familiarity preferred; excellent communication and learning mindset.
Python, PySpark, PyTorch, LLMs
3mo
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Staff Software Engineer
Boston or Kyiv or Seattle or Lviv or San Francisco
HybridFull Time
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.
Kubernetes, Python, Go, Helm, Terraform, Pulumi, Kyverno, Cilium, GitOps, CI/CD
2mo
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Staff+ Software Engineer, GRC Platform
San Francisco or New York City or Seattle
$405k/yr HybridFull Time
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
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
2mo
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Member of Technical Staff, Software Engineer
San Francisco, California, United States
OnsiteFull Time
Experience building backend systems, data pipelines, product surfaces, and internal tools for AI/research workflows; strong product engineering judgment, emphasis on correctness, observability, and iteration speed.
3w
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Senior Software Engineer - AI, CoCounsel International
Eagan or Frisco or New York City or Ann Arbor or San Francisco or Los Angeles or Irvine or McLean or Washington
$110k-$204k/yr HybridFull Time
4+ YOE4+ years backend engineering experience with Python, FastAPI, PostgreSQL, AWS; production agentic AI and LLM integration experience; strong debugging, architecture, and collaboration skills.
Python, FastAPI, PostgreSQL, AWS, OpenAI, Anthropic
2w
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Full-Stack Product Engineering Intern
San Francisco, California, United States
OnsiteInternship, Part Time
Pursuing or recently completed bachelor's in CS or related field; experience with JavaScript/TypeScript and frontend frameworks; basic backend experience (Python/Node.js); familiarity with APIs, databases, and Git.
JavaScript, TypeScript, React, Next.js, Vue, Angular, Python, Node.js, PostgreSQL, Git, APIs, CI/CD, containers, cloud services
2w
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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
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
3w
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UX Design Engineer, Content Tooling
San Francisco or Sunnyvale or Seattle or New York City
$124k-$260k/yr OnsiteFull Time
5+ YOERequires 5–8 years building complex internal tools or platforms, strong React and TypeScript/JavaScript skills, backend experience, experimentation and infrastructure integrations, and cross-functional design collaboration.
React, JavaScript, TypeScript, Kotlin, Java, GPT, LLMs, A/B testing, feature flags
3w
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Platform Engineer (12x Openings)
Palo Alto, California, United States
$225k-$290k/yr HybridFull Time
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
2mo
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Full Stack Engineer - Internal Audit
Bengaluru or San Francisco
OnsiteFull Time
5+ YOE5+ years full stack engineering experience; strong backend (Python, Go, Node.js) and frontend (React, TypeScript); SQL/NoSQL, API design, cloud-native architectures (Cloudflare Workers, AWS/GCP); familiarity with data pipelines, LLMs/ML, and audit/risk concepts.
Python, Go, Node.js, React, TypeScript, SQL, NoSQL, REST, GraphQL, Cloudflare Workers, KV, D1, AI Gateway, AWS, GCP, LLMs, ETL, ELT
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