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1,070 senior backend developer jobs at 470 companies in Union City, CA

3mo
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Senior Backend Engineer, Agentic
Palo Alto, California, United States
$350k-$500k/yr OnsiteFull Time
Inflection AI
Inflection AI: Develops human-centered personal AI and large language models.
10+ YOESenior backend engineer with 10+ years in production cloud systems; strong Python, PostgreSQL, Redis; cloud experience (AWS/GCP/Azure); Kubernetes; LLM patterns; ownership and reliability.
Python, PostgreSQL, Redis, Kubernetes, Docker, Cloud Platform (AWS/GCP/Azure), LangGraph, LlamaIndex, OpenAI
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2mo
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Senior Backend Engineer
San Francisco, California, United States
$175k-$275k/yr OnsiteFull Time
Hedra
Hedra: Builds artificial intelligence models for character-driven video generation.
5+ YOE5+ years backend development with Python, FastAPI/Pydantic; Kubernetes/EKS; relational databases; AWS stack; building scalable services.
Python, FastAPI, Pydantic, Kubernetes, EKS, PostgreSQL, Redis, S3, DynamoDB, AWS
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3mo
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Senior Backend Developer
San Francisco, California, United States
$160k-$210k/yr RemoteFull Time
Ellipsis Health
Ellipsis Health: AI-powered voice agent for healthcare care management.
5+ YOE5+ years backend development; strong TypeScript/Node.js; REST/GraphQL; orchestration layers; microservices; cloud platforms; Kubernetes; SQL/NoSQL; secure data handling; CI/CD; production ownership.
TypeScript, Node.js, REST, GraphQL, Kubernetes, AWS, GCP, Azure, PostgreSQL, MongoDB, DynamoDB, CI/CD
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10h
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Senior Backend Engineer
Oakland, California, United States
$150k-$200k/yr OnsiteFull Time
Arxlight
Arxlight: Developing next-generation autonomous drones for security and defense applications.
Requires Linux expertise, backend or systems development in Python, C++, Go, TypeScript, or similar languages, networking, Docker, Systemd, Git, and AI coding tools.
Linux, Python, C++, Go, TypeScript, Docker, CI/CD, Systemd, TCP/IP, UDP, Git, MAVLink, Kotlin, Java
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1mo
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Senior Backend Engineer
Madrid or Paris or Seattle or London or Berlin or San Francisco or New York City or Sydney or Mexico City
HybridFull Time
Aircall
Aircall: Cloud-based business phone system and customer communication platform.
6+ YOE6+ years backend development with a typed language (TypeScript preferred), production AWS experience, infrastructure-as-code (CloudFormation or Terraform), security-first mindset, serverless experience, GraphQL a plus, on-call rotation and mentoring experience.
TypeScript, AWS, CloudFormation, Terraform, GraphQL
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3mo
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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.
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1d
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Senior Backend Engineer
Redwood City, California, United States
OnsiteFull Time
Waystation
Waystation: AI-native procurement platform for consumer packaged goods.
6+ YOERequires 6+ years of production software experience, 2+ years at a seed-to-Series B startup, backend/data expertise, live schema migrations, queues, APIs, and strong communication.
TypeScript, Node, React, GraphQL, Postgres, Claude Code
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1mo
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Senior Backend Engineer
San Francisco, California, United States
OnsiteFull Time
Judgment Labs
Judgment Labs: Infrastructure for monitoring and optimizing autonomous AI agents.
6+ YOE6+ years building high-throughput backend systems; strong API design, data modeling, distributed systems experience; hands-on with ClickHouse/Presto; EM and platform collaboration skills.
ClickHouse, Presto, Kafka, Spark, Flink, Ray, Airflow, Dagster, Prefect
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1mo
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Senior Backend Engineer
San Francisco, California, United States
$230k-$280k/yr OnsiteFull Time
Mochi Health
Mochi Health: Provides telehealth weight management and prescription medication services.
5+ YOE5+ years backend engineering experience, strong distributed systems and data modeling skills, experience owning infrastructure (Kubernetes, Terraform, AWS), proficiency with TypeScript/Node.js, excellent communication.
TypeScript, Node.js, Express, PostgreSQL, Redis, Kubernetes, Terraform, AWS, Codex 5.3, Claude Opus 4.6
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3w
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Senior Backend Engineer
Mountain View, California, United States
$190k-$240k/yr HybridFull Time
Matternet
Matternet: Develops autonomous drone networks for urban package delivery.
6+ YOE6+ years building and operating production backend systems; strong Node.js/TypeScript skills, API design (GraphQL/REST), relational databases, cloud, containers, CI/CD, reliability, monitoring, and security.
Node.js, TypeScript, GraphQL, NestJS, Next.js, React, Kafka, MQTT
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2w
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Senior Backend Engineer, Product
San Francisco, California, United States
OnsiteFull Time
Orion Sleep
Orion Sleep: Manufacturer of AI-powered smart mattress covers for sleep optimization.
Experience designing APIs, scaling backend systems from 0-1, and building infrastructure to support product features; strong backend engineering and system-architecture skills.
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2mo
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Senior Backend Developer - Updated
San Francisco, California, United States
OnsiteFull Time
StackOne
StackOne: Unified API platform for AI agent integrations.
5+ YOE5+ years backend experience, proficiency in Java, Python or Go, microservices and RESTful API experience, SQL/NoSQL knowledge, cloud platform experience, strong problem-solving and communication.
Java, Python, Go, SQL, NoSQL, AWS, GCP, Azure
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1mo
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Senior Backend Engineer
Los Angeles or New York City or San Francisco
$170k-$200k/yr HybridFull Time
Tatari
Tatari: A platform for buying and measuring TV advertising campaigns.
6+ YOE6+ years software development (Python required), 4+ years building distributed systems and modern data stacks, deep SQL and data modeling, experience with LLMs and agentic coding tools, strong communication and cross-team collaboration.
Python, Cursor, Copilot, Cody, RDS, Databricks, Spark, Redshift, Kafka, Airflow, dbt, SQL, REST, gRPC, GraphQL
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1w
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Java Backend Developer
Sunnyvale, California, United States
$90k-$102k/yr HybridFull Time
Cognizant
CognizantNasdaq: CTSH: Provides global information technology and business process outsourcing services.
8+ YOE8+ years Java development experience with Springboot and microservices, strong backend and commerce domain skills, mentoring and CI/CD experience, database and API proficiency.
Java, Springboot, RESTful APIs
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3mo
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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
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3mo
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Backend Engineer
San Mateo, California, United States
OnsiteFull Time
Luminary Cloud
Luminary Cloud: Cloud-native physics simulation platform for accelerated product engineering.
10+ YOE10+ years building high-performance backend systems; Kubernetes expertise; SaaS focus; cloud infrastructure and security; leadership and mentoring; strong communication.
Kubernetes, Docker, GCP, CI/CD
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1mo
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Senior/Staff Backend Engineer
New York City or San Francisco
OnsiteFull Time
Lighthouse
Lighthouse: Technology-driven platform for U.S. immigration and visa services.
5+ YOE5+ years building and operating production backend systems; strong in Python and TypeScript; experience with PostgreSQL, GraphQL, serverless, async and event-driven architectures; familiarity with LLMs and integrations (Slack, Linear, HubSpot, Front).
Python, TypeScript, PostgreSQL, GraphQL, Slack, Linear, HubSpot, Front, CRDTs, LLMs, serverless
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1mo
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Senior Backend Software Engineer
New York City or San Francisco
$100k-$200k/yr OnsiteFull Time
Alpaca Health
Alpaca Health: Enabling clinicians to launch and scale independent autism care clinics.
Senior backend engineer with strong system-design and ownership; builds integrations, billing/payments, data pipelines, and AI/LLM infrastructure. Experience in operationally complex domains (healthcare, fintech, insurance) or early-stage startups preferred.
Candid, Silna, Availity, HubSpot, LLM
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1mo
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Senior Backend Engineer - Product
San Francisco or New York City or Portland or United States or Canada
$167k-$208k/yr HybridFull Time
Mercury
Mercury: Banking services and financial software designed for startup companies.
3+ YOE3+ years backend development experience, proficiency in SQL, familiarity or willingness to learn Haskell, product-minded, experience making architecture decisions, strong communication, and use of AI tools to boost productivity.
Haskell, SQL
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2mo
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Senior Backend Engineer
United States or San Francisco
$170k-$195k/yr RemoteFull Time
Fieldwire
Fieldwire: Construction management software for field and office coordination.
5+ YOE5+ years production web application experience, CS degree or equivalent, strong algorithms/data-structures, relational DB expertise, mentoring and architecture leadership.
Ruby on Rails, Docker, AWS
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