Fullstack Software Engineer jobs in United States
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Siena AI · 1 month ago

Fullstack Software Engineer

positionCanada
timeFull-time
remoteRemote
seniorityMid Level
date3+ years exp

Siena AI is creating an operating system of AI agents to enhance customer experiences. As a Fullstack Software Engineer, you will own projects end-to-end, developing features for their AI-powered customer support automation platform.

Artificial Intelligence (AI)E-CommerceEnterprise SoftwareMachine LearningSoftware

Responsibilities

Design, build, and maintain scalable features across the full stack (frontend, backend, and infra)
Collaborate with Product to break down scope into iterative, high-impact releases
Integrate cutting-edge LLM capabilities into real enterprise workflows
Work on an AI-first product, integrating cutting-edge LLM capabilities into enterprise customer support workflows
Solve complex engineering challenges, from optimizing API performance to refining microservices architecture
Maintain and improve our cloud infrastructure (AWS) with a DevOps mindset
Exercise high agency and ownership—taking initiative, making decisions, and driving ideas to production

Qualification

Node.jsReactTypeScriptAWSPostgreSQLRedisCI/CDMicroservicesAI-first mindsetCuriosityProactivityProduct-drivenTeam collaborationProblem-solvingAdaptabilityOwnershipCommunication

Required

3+ years building in Node.js, React, TypeScript, and Express
Strong with PostgreSQL, Redis, and cloud environments (AWS: Fargate, Lambda, EC2, SQS)
Familiar with CI/CD (CodePipeline, GitHub Actions, or similar)
Experience with microservices and scalable systems
Product-driven—you care about the impact of what you ship, not just the code
AI-first—you live in Cursor, Claude Code and are comfortable orchestrating coding agents
Naturally curious and proactive; you don't wait for instructions, you create momentum

Preferred

Next.js, Python, or event-driven architectures
Infra-as-code (Terraform, CDK)
Experience integrating with LLMs in production
Event-driven architecture experience

Benefits

Great salary plus the opportunity for equity or stock grants.
Learning budget. If you're growing, so are we.
Everyone gets premium accounts (ChatGPT, Claude, Perplexity Pro, Cursor, Lovable) plus a quarterly budget for new tools.

Company

Siena AI

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Siena AI is the creator of an autonomous chat platform that aims to blend human empathy and intelligent automation.
dateFounded in 2022
location
San Francisco, California, USA
people-size11-50 employees
web-link
https://siena.cx

Funding

Current Stage
Early Stage
Total Funding
$11.05M
Key Investors
Sierra VenturesGapMinder VC
2024-09-01Seed· $6M
2023-11-16Seed· $4.7M
2020-09-28Pre Seed· $0.35M

Leadership Team

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Andrei Negrau
ceo, founder
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Recent News

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Company data provided by crunchbase