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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Fullstack Engineer - **Company:** Siena AI - **Location:** United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Artificial Intelligence, Amazon Web Services, Amazon Elastic Compute Cloud, Application Performance Management, DevOps, Github, Python (Programming Language), PostgreSQL, Language Modeling, Node.Js, Redis, Next.js, TypeScript, ReactJS, Delivery Pipeline, Large Language Models, Backend, Event Driven Architecture, AWS Fargate, Front End Software Development, Functional Programming, Amazon Simple Queue Service (SQS), Terraform, Microservices - **Published:** September 23, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/pm2ufvgpk3 ## About the Role * 5+ years shipping and owning systems that are live in production, not personal projects. * Strong in our core stack: Node.js, React, TypeScript, Express. * You've shipped LLM-powered features to real users. This is a must, not a bonus. You know what breaks when models meet production traffic. Strong Signal: _not dealbreakers, but what separates a good hire from a great one _ * Solid with AWS (Fargate, Lambda, EC2, SQS), PostgreSQL, and Redis. * Comfortable with CI/CD pipelines (CodePipeline, GitHub Actions, or similar). * Experienced with microservices and scalable systems. * Product-focused. You think past the code to customer outcomes and business impact. * High-ownership and direct. You fix problems without waiting to be told. ## Description Siena is the Agent of Record for CX, built for consumer brands like Spanx, FIGS, Brooklinen, and Grüns. It runs as a connected multi-agent stack on top of a shared intelligence layer: agents that sell, support, listen, handle social and voice across the entire customer journey, turning every conversation into signal you can act on. The team We are a small, fully distributed, global team. We have built leverage into how we work, which is what lets a team this size move at the speed we do. We hire athletes. Everyone here owns real outcomes, defaults to writing over meetings, communicates with directness, and acts the moment they see something worth acting on. Low ego, high standards, fast clock. If you want to set the bar rather than follow one, keep reading. The Role You'll own meaningful parts of the platform end to end, taking ambiguous problems and shipping reliable, high-performance systems that real brands depend on daily. You'll work closely with product to shape scope, make real architectural calls in your area, and do your best work without being managed task by task. This is for engineers who want ownership and can carry it. What You'll Do * Own features and systems across the full stack (frontend, backend, infrastructure) from problem definition through production. * Partner with product to break down ambiguous scope and ship in iterative, high-impact releases. * Make real architectural and design decisions in your area, and explain the reasoning so the team can build on it. * Take cutting-edge language models into enterprise customer workflows, where reliability and safety actually matter. * Solve hard engineering problems: API performance, microservices, scaling across channels and brands. * Maintain and improve our AWS infrastructure with a DevOps mindset. * Raise the bar around you. Share what you know, review thoughtfully, help teammates level up., * Next.js. * Infrastructure as Code (CDK, Terraform). * Python. * Event-driven architecture. * Background in customer support or CX software. Not a Fit If * You want tickets assigned to you and a clear spec before you start. * You've only worked on internal tools, never shipped something real users depend on every day. * You need a manager checking in regularly to stay motivated. Why Siena? Real ownership. You will own problems, not tasks, with the autonomy to solve them your way and the trust to do it without a manager in your inbox. Work that ships and matters. What you build reaches real consumer brands fast. A category we are creating. The Agent of Record is new ground, with unsolved problems and cutting-edge models, not a crowded field to compete in. ## Related Videos - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Accelerating Authentication Architecture: Taking Passwordless to the Next Level](https://www.wearedevelopers.com/videos/733-accelerating-authentication-architecture-taking-passwordless-to-the-next-level) - [Developer Experience, Platform Engineering and AI powered Apps](https://www.wearedevelopers.com/videos/990-developer-experience-platform-engineering-and-ai-powered-apps) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 137 - AI'm not sure about this](https://www.wearedevelopers.com/magazine/485-dev-digest-137-ai-m-not-sure-about-this)