Join to apply for the Senior Fullstack Engineer role at Siena AI

Join to apply for the Senior Fullstack Engineer role at Siena AI

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About Siena

Siena is building enterprise empathic AI Agents powered by reasoning-adept LLMs. Siena is the first AI Agent of its kind, designed to integrate with existing systems and interact with customers across multiple channels from a single, unified platform.

About Siena

Siena is building enterprise empathic AI Agents powered by reasoning-adept LLMs. Siena is the first AI Agent of its kind, designed to integrate with existing systems and interact with customers across multiple channels from a single, unified platform.

If you're excited about the intersection of human-to-machine communication and want to be part of a team driving innovation and making a real impact in automating agentic workflows, join us on our mission to revolutionize customer experience through empathetic AI.

Our AI-First Philosophy

At Siena, AI isn't just a tool—it’s embedded in our DNA. We believe that leveraging AI-first workflows empowers individuals to work smarter, faster, and more creatively. Our team embraces AI-powered augmentation in everything we do, from research to execution, making us more efficient and innovative every day.

About The Role

As a Full Stack Engineer at Siena, you’ll own projects end-to-end, developing and optimizing features within our AI-powered customer support automation platform. You’ll work closely with product and engineering teams, shaping our roadmap while building reliable, high-performance systems. This role is for engineers who love solving real-world problems, thrive in fast-moving environments, and take pride in shipping great products.

What You’ll Do

• Design, build, and maintain scalable features across the full stack (frontend, backend, and infrastructure).
• Collaborate closely with Product to break down scope and deliver in iterative, high-impact releases.
• 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.
• Share knowledge and mentor teammates, fostering a strong engineering culture.
  
  

• 7+ years of software engineering experience in Node.js, React, TypeScript, and Express.
• Solid experience with cloud environments (AWS – Fargate, Lambda, EC2, SQS).
• Strong database skills with PostgreSQL and Redis.
• Familiarity with CI/CD pipelines (CodePipeline, GitHub Actions, or similar).
• Product-focused mindset—you think beyond just code and care about business impact.
• Deep experience in microservices architectures and scalable systems.
  
  

• Experience with Next.js and LLM integrations.
• Infrastructure as Code (CDK, Terraform).
• Python programming skills.
• Event-driven architecture experience.
• Background in customer support software.
  
  

• Make a real impact. Your work directly shapes our product and company.
• A Voice that matters. In a small team, every perspective counts—yours included.
• Working at Siena. We are a fully remote, globally distributed team working at the bleeding edge of CX and generative AI.
• Competitive compensation. Great salary plus the opportunity for equity or stock grants.
• Flexible time off. Take at least 15 days—more if you need it.
• A Learning budget. If you're growing, so are we.
• The thrill of building something new. Join us at a stage where your contributions matter most.
• Tackling meaningful challenges. We’re redefining how work gets done through AI.
  
  

• Curiosity and creativity: You always seek new knowledge, ask questions, and explore different perspectives to deepen your understanding.
• Customer empathy: You are driven by our customers’ success. You see needs they can’t articulate.
• Resilience: You bounce back from setbacks, adapt to change, and thrive in the face of challenges.
• Ownership and autonomy: When things break, you fix first, explain later.
• Relationships: You create bonds with your colleagues - building trust and sharing success.
• Craft and speed: You balance vision with pragmatism. Your standards pull everyone higher.
• Open and direct: You share and receive feedback. You are open about what’s working and what not.
  
  

• Perplexity Pro account
• ChatGPT Pro account
• Claude Pro account
• Quarterly budget for experimenting with new AI tools
• A culture that encourages AI experimentation and adoption
  
  

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Technology, Information and Internet

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