267 back end engineer jobs at 170 companies in Fairfield, CA

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
6d
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Sr Backend Engineer
San Francisco or New York
$167k-$219k/yr HybridFull Time
Quizlet
Quizlet: Digital learning platform providing study tools and flashcards.
4+ YOE4+ years backend or data engineering experience; strong SQL and data warehouse experience; proficiency in Python/Java/Scala; Elasticsearch/OpenSearch experience; experience building production data pipelines and backend services.
Elasticsearch, OpenSearch, SQL, Snowflake, BigQuery, Redshift, Python, Java, Scala, Airflow, Dagster, Prefect, dbt, REST, gRPC, Datadog, Prometheus, Grafana, Docker, Kubernetes, AWS, GCP, Azure, Spark, Kafka, Flink, FAISS, ScaNN, pgvector, LightGBM, XGBoost, BM25, HNSW, kNN
1mo
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Lead Backend Engineer
San Francisco or Lehi or Plano
$138k-$216k/yr HybridFull Time
Collective Health
Collective Health: Cloud platform for managing employer-sponsored health benefits.
10+ YOE10+ years backend engineering experience with Java and Spring Cloud, microservices and integration platform experience (Mulesoft), AI tooling familiarity, cloud (AWS/GCP), SQL/PostgreSQL, system development, and strong communication and leadership skills.
Java, Spring Cloud, Mulesoft, GitHub Copilot, Cursor, WindSurf, AWS, GCP, SQL, PostgreSQL
1mo
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Software Engineer, Back-End
San Francisco or Seattle
$164k-$284k/yr HybridFull Time
Superhuman
Superhuman: An AI-native productivity platform for email, writing, and collaboration.
5+ YOE5+ years back-end development, production systems at scale, cloud platforms, AI-powered systems, APIs, CI/CD, real-time architectures, independent and collaborative work.
Go, AWS, GCP, Azure, CI/CD, Infrastructure as Code, Real-time systems
3w
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Senior Backend Engineer
San Mateo, California, United States
$170k-$260k/yr OnsiteFull Time
Verkada
Verkada: Sells integrated AI-powered cloud physical security hardware and software.
4+ YOEBachelor's degree in CS/CE/SE, 4+ years industry experience, mastery of Python or Go, experience with Postgres/MySQL, Redis/Memcached, Kafka, cloud providers (AWS/GCP/Azure), gRPC, React, strong communication skills, onsite 5 days/week.
Python, Go, Postgres, MySQL, Redis, Memcached, Kafka, AWS, GCP, Azure, React, GRPC
1mo
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Senior Backend Engineer
San Francisco, California, United States
$200k-$230k/yr OnsiteFull Time
Sauron Systems
Sauron Systems: Autonomous robotic platforms for residential security and threat deterrence.
5+ YOE5+ years building production backend systems; proficiency in Go, Python, Rust, Java, or C++; experience with distributed systems, REST/gRPC, PostgreSQL/MySQL/Redis/DynamoDB, AWS, Docker, Kubernetes, and observability; strong system design and debugging skills.
Go, Python, Rust, Java, C++, REST, gRPC, PostgreSQL, MySQL, Redis, DynamoDB, AWS, Docker, Kubernetes, Kafka, NATS, RabbitMQ
4w
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Sr. Backend Engineer
San Francisco, California, United States
$145k-$170k/yr HybridFull Time
LeapXpert
LeapXpert: Compliant enterprise communication platform for secure consumer messaging.
6+ YOE6+ years building backend/distributed systems, experience designing agentic runtimes and SDKs, multi-tenant isolation, async/concurrent patterns, secure API design, observability, and production-grade platform development.
Temporal, Claude Code, Codex, Gemini CLI, Go, Python, TypeScript/Node.js, Rust, Kubernetes, CI/CD, OpenTelemetry, Prometheus, Grafana, SQL, gRPC, Claude Managed Agents, Bedrock Agents, Google Agent Builder, Azure AI Services, Google ADK, Claude Agent SDK, OpenAI SDK, LangChain, CrewAI, AutoGen, MCP, Kafka, Neo4j
3mo
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Backend Engineer
San Francisco, California, United States
$190k-$220k/yr OnsiteFull Time
Wordware
Wordware: Full-stack operating system for building AI applications.
Senior backend-leaning full-stack engineer; onsite in San Francisco; full-time; $190k-$220k; US-based or relocation.
TypeScript, React, Next.js, Node.js, PostgreSQL, Cloudflare, AWS, AI model integrations
2mo
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Backend Engineer
San Francisco, California, United States
$190k-$230k/yr OnsiteFull Time
Lapel
Lapel: Unifying customer data to power personalized service at scale.
3+ YOE3+ years backend or software engineering; API design; backend architecture; Node.js/Python/Go; PostgreSQL/MySQL; scalable systems; customer-focused.
Node.js, Python, Go, PostgreSQL, MySQL, TypeScript, Temporal, Pulsar
1mo
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Backend Engineer
San Francisco, California, United States
$130k-$200k/yr OnsiteFull Time
Sandberg Goldberg Bernthal Family Foundation
Sandberg Goldberg Bernthal Family Foundation: Operates programs for women's empowerment and community resilience.
3+ YOE3+ years backend or full-stack engineering experience with data/analytics; strong Python (preferred) or Node.js/Ruby/Java, SQL and NoSQL skills; experience building data pipelines, defining metrics, A/B testing, and data visualization; bachelor's in CS/data field or equivalent.
Python, Node.js, Ruby, Java, SQL, NoSQL, RESTful APIs
1w
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Backend Infrastructure Engineer
San Francisco or North America
$200k-$250k/yr HybridFull Time
Firecrawl
Firecrawl: Converts websites into clean structured data for AI.
3+ YOE3+ years in backend, networking, or infrastructure engineering; production ownership and on-call responsibility; authorized to work in the US or eligible remote regions.
2mo
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Senior Backend Engineer
San Francisco, California, United States
$150k-$300k/yr OnsiteFull Time
Amari
Amari: AI agents automating document-heavy workflows for the logistics industry.
4+ YOE4–6 years backend software engineering in a high-growth startup; ownership of backend systems; strong architectural judgment; in-person SF collaboration.
2mo
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Senior Backend Engineer (Python)
San Francisco, California, United States
$175k-$250k/yr RemoteFull Time
Ellipsis Health
Ellipsis Health: AI-powered voice agent for healthcare care management.
4+ YOE4+ years building production back-ends in Python; real-time streaming; AWS/GCP/Azure; PostgreSQL/Redis; FastAPI/asyncio; HIPAA security.
Python, FastAPI, asyncio, WebRTC, WebSockets, gRPC, AWS, GCP, Azure, Kubernetes, Kafka, SQS, Pub/Sub, Terraform, PostgreSQL, Redis, OpenTelemetry
2mo
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Senior Backend Engineer - Identity
New York or San Francisco
$130k-$197k/yr OnsiteFull Time
LiveRamp
LiveRampNew York Stock Exchange: RAMP: Provides a platform for secure data collaboration and identity.
5+ YOE5+ years experience building high-performance production systems; strong Go plus Java/Python; distributed systems and APIs; cloud exposure (GCP preferred).
Go, Java, Python, Kubernetes, Redpanda, SingleStore, Terraform, Google Cloud Platform, BigQuery, Pub/Sub, DataProc
2mo
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Senior Backend Engineer (Product)
San Francisco, California, United States
$200k-$300k/yr OnsiteFull Time
Conversion
Conversion: AI-native marketing automation platform for modern B2B companies.
5+ YOE5+ years experience shipping product features; backend services experience; Go; Kafka; Temporal; PostgreSQL; ClickHouse; GCP.
Go, Kafka, Temporal, PostgreSQL, ClickHouse, GCP
1w
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Senior Backend Engineer (Go)
Casablanca or Palma de Mallorca or Europe or London or New York City or San Francisco or Africa
HybridFull Time
Nuitée
Nuitée: Provides API infrastructure for the global travel industry.
Strong hands-on Go experience, history integrating third-party APIs, ownership of end-to-end integrations, and ability to work at high scale and low process.
Go
1mo
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Backend Engineer
San Francisco, California, United States
$135k-$250k/yr HybridFull Time
Fable Security
Fable Security: AI-driven platform managing human risk and employee security behavior.
3+ YOE3+ years developing backend software; experience designing, implementing, and owning production services; familiarity with relational DBs (Django or similar), APIs, ETL/data pipelines, distributed systems, and cloud tooling (AWS, Terraform, EKS).
Kafka, Spark, Airflow, Django, AWS, Terraform, EKS, GenAI
2w
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Backend Engineer
San Francisco or New York City or Austin or Seattle
$175k-$300k/yr OnsiteFull Time
Fluidstack
Fluidstack: Provides high-performance cloud GPU infrastructure for AI development.
Experience building production services, observability, API and control-plane design, API-first infrastructure, incident response/pager duty, and familiarity with AI tooling and distributed systems.
LLM APIs, MCP servers, Claude Code, Cursor, Prometheus, Thanos, VictoriaMetrics, Temporal, Cadence, BMC/Redfish, Go, Python, Postgres, Kubernetes
2mo
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Backend Engineer
San Francisco, California, United States
$140k-$290k/yr OnsiteFull Time
Paraform
Paraform: Marketplace connecting hiring companies with specialized recruiters and AI.
Deep backend expertise; pragmatic, operationally minded, high ownership; experience building production services, databases, and integrations.
PostgreSQL, REST APIs, CI/CD, Git, Authentication, Observability
1w
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Backend Engineer
San Francisco or United States or Ukraine or Portugal or South America
$72k/yr RemoteFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
Proficiency in TypeScript/Node.js, PostgreSQL, event-driven workflows (Temporal), CI/CD, automated testing, production monitoring and on-call readiness; strong async communication skills.
TypeScript, Node.js, NestJS, Temporal, Temporal Cloud, PostgreSQL, AWS, RDS, ECS, EKS, Terraform, Anthropic, OpenAI, React, Next.js, Datadog, Clerk, Linear, GitHub, Claude Code, Codex
2mo
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Senior/Staff Backend Engineer
New York or San Francisco
$170k-$220k/yr HybridFull Time
Casap
Casap: Building an AI-native disputes automation and fraud prevention platform with a mission to reduce fraud and streamline workflow for financial institutions.
6+ YOE6+ years in software development; at least 2 years with Go or Java in production; platform team/API/background services; end-to-end feature ownership; strong problem-solving and data structures knowledge; mentoring and technical leadership; strong communication.
Go, Java, CI/CD, microservices, backend development