Senior Fullstack Engineer

<h2><strong>About Siena</strong></h2><p>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.</p><p>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.</p><p><strong>Our AI-First Philosophy</strong></p><p>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.</p><h2></h2><p><strong>About the Role</strong></p><p>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.</p><p><strong>What You’ll Do</strong></p><ul><li><p>Design, build, and maintain scalable features across the full stack (frontend, backend, and infrastructure).</p></li><li><p>Collaborate closely with Product to break down scope and deliver in iterative, high-impact releases.</p></li><li><p>Work on an AI-first product, integrating cutting-edge LLM capabilities into enterprise customer support workflows.</p></li><li><p>Solve complex engineering challenges, from optimizing API performance to refining microservices architecture.</p></li><li><p>Maintain and improve our cloud infrastructure (AWS) with a DevOps mindset.</p></li><li><p>Share knowledge and mentor teammates, fostering a strong engineering culture.</p></li></ul><p><strong>Who You Are</strong></p><ul><li><p>7+ years of software engineering experience in <strong>Node.js, React, TypeScript, and Express</strong>.</p></li><li><p>Solid experience with cloud environments (<strong>AWS – Fargate, Lambda, EC2, SQS</strong>).</p></li><li><p>Strong database skills with <strong>PostgreSQL and Redis</strong>.</p></li><li><p>Familiarity with <strong>CI/CD pipelines</strong> (CodePipeline, GitHub Actions, or similar).</p></li><li><p>Product-focused mindset—you think beyond just code and care about business impact.</p></li><li><p>Deep experience in <strong>microservices architectures</strong> and scalable systems.</p></li></ul><p><strong>Bonus Points</strong></p><ul><li><p>Experience with <strong>Next.js and LLM integrations</strong>.</p></li><li><p>Infrastructure as Code (CDK, Terraform).</p></li><li><p>Python programming skills.</p></li><li><p>Event-driven architecture experience.</p></li><li><p>Background in customer support software.</p></li></ul><h2><strong>Why Join Us</strong></h2><p>We’re a startup, so no fancy offices or corporate fluff. But here’s what we do offer:</p><ul><li><p><strong>Make a real impact.</strong> Your work directly shapes our product and company.</p></li><li><p><strong>A voice that matters.</strong> In a small team, every perspective counts—yours included.</p></li><li><p><strong>Work your way.</strong> Whether it’s from home, a coffee shop, or a moon base—if you're productive, we’re happy.</p></li><li><p><strong>Competitive compensation.</strong> Great salary plus the opportunity for equity or stock grants.</p></li><li><p><strong>Flexible time off.</strong> Take at least 15 days—more if you need it.</p></li><li><p><strong>A learning budget.</strong> If you're growing, so are we.</p></li><li><p><strong>The thrill of building something new.</strong> Join us at a stage where your contributions matter most.</p></li><li><p><strong>Tackling meaningful challenges.</strong> We’re redefining how work gets done through AI.</p></li></ul><h2><strong>Our values</strong></h2><p>We’re not about corporate jargon—here’s what truly matters to us:</p><ul><li><p><strong>Curiosity and creativity</strong>: You always seek new knowledge, ask questions, and explore different perspectives to deepen your understanding.</p></li><li><p><strong>Customer empathy</strong>: You are driven by our customers’ success. You see needs they can’t articulate.</p></li><li><p><strong>Resilience</strong>: You bounce back from setbacks, adapt to change, and thrive in the face of challenges.</p></li><li><p><strong>Ownership and autonomy</strong>: When things break, you fix first, explain later.</p></li><li><p><strong>Relationships</strong>: You create bonds with your colleagues - building trust and sharing success.</p></li><li><p><strong>Craft and speed</strong>: You balance vision with pragmatism