Senior Fullstack Engineer

About Siena

Our AI-First Philosophy

About The Role

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.

Who You Are

• 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.

Bonus Points

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

Why Join Us

• 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.
• Work your way. Whether it's from home, a coffee shop, or a moon base---if you're productive, we're happy.
• 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.

Our values

• 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.

AI-First Tooling

• 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