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# Senior Full Stack Engineer

- **Company:** ARCUS
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Application Integration Architecture, Python (Programming Language), PostgreSQL, Operational Databases, Software Engineering, TypeScript, Google Cloud, ReactJS, Large Language Models, Backend, Agentic-AI, Front End Software Development, Terraform, Docker, Golang
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25303_34a1cda462751207d2390740c330cbc2

## About the Role

* 5+ years of software engineering experience, ideally with a strong full-stack background.
 * Experience building and shipping production applications that integrate LLMs or other AI capabilities.
 * Strong backend engineering skills in Go or another typed language, alongside Python experience.
 * Experience with React and TypeScript, plus PostgreSQL and production database operations.
 * An understanding of modern LLM development patterns, such as orchestration, tool calling, context management and evaluations.
 * Experience owning significant engineering projects and making decisions independently.
 * A pragmatic, product-minded approach, with the ability to balance engineering quality against delivery speed.
 * Strong communication skills and experience incorporating customer feedback into product development.
 * Experience with agentic AI, AI agents or multi-step automated workflows.
 * Previous experience at an early-stage startup or as a founding engineer.
 * A combination of experience in larger technology companies and high-autonomy environments.
 * Familiarity with Terraform, Docker, GCP or infrastructure as code.
 * Experience building enterprise SaaS products.

## Description

* Design, build and ship production features across the frontend, backend and AI integration layers.
 * Develop LLM-powered applications, including orchestration, tool calling, context management and multi-step workflows.
 * Build reliable backend services and APIs, working with Go, Python, PostgreSQL and modern frontend technologies.
 * Take ownership of projects end-to-end, making pragmatic technical decisions around architecture, scalability and delivery.
 * Work closely with customers to understand their challenges, gather feedback and improve the product based on real-world usage.
 * Help establish engineering practices and technical foundations as the company grows.