Staff Python Backend Engineer

About Circuit Circuit is building the world’s first company-centric knowledge network. Our AI-powered platform turns fragmented information into actionable knowledge that can be securely shared across partners, vendors, and customers. Backed by a senior team and early enterprise traction, we’re moving fast, and we’re looking for a sharp and hungry Senior Python Backend Engineer to help build our ML services. Role Summary This backend engineering role is focused on supporting and building out our ML services, as well as our ML infrastructure and tooling. Our ML infrastructure and services are built in Python, and our overall backend infrastructure is built in Go. You’ll be expected to be the Python expert, with a deep understanding of how to build resilient and high quality services in Python, as well as how to support a team that is moving fast to build out new features. You will work closely with our ML team, helping with feature buildouts and execution, and with the rest of our backend team, aligning on best operational practices. Responsibilities Build and maintain Python services and internal tooling that power our AI products Develop frameworks and APIs that make it faster and easier for our AI engineers to experiment and ship features Own the “glue” that connects AI models, data pipelines, and product experiences — so our AI engineers can focus on model quality, not boilerplate Collaborate closely with AI engineers to understand pain points and automate repetitive tasks in their workflows Experience Strong Python and async experience Experience with AI/ML APIs (OpenAI, Anthropic, etc.) Building SDKs / internal libraries Knowledge of RAG/agentic architectures (bonus) Experience running web services at scale (FastAPI, Flask, or Django) Experience with batch processing systems (Airflow, Argo Workflows, Dagster) Experience with performance and memory optimization Experience with Go, Kubernetes, Datadog is a plus Human Skills Strong problem-solving abilities and adaptability in a fast-paced, dynamic environment Results oriented and ability to move fast, while still maintaining quality Team-first mindset, low ego and collaborative Strong desire to win Eager to experiment with emerging AI tools and practices, constantly seeking better, smarter ways to operate What We Offer Early-Stage Ownership: Join at the ground floor of a company with real traction and momentum Empowered Culture: We value autonomy, candor, and craft. You\'ll be trusted to lead Cutting-Edge Tech: Work with the latest in AI and intelligent systems Meaningful Impact: Shape a platform that transforms how organizations activate knowledge. Holistic Benefits: Competitive comp, equity, 100% paid healthcare, 401K, flexible PTO, and a team that truly cares Equal-Opportunity Employer We are an equal-opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Who Should Apply If you\'re a results-driven, collaborative engineer with a passion for building high-impact backend systems and excited to shape the future of AI infrastructure at a fast-moving startup, we’d love to hear from you! Job Details Seniority level: Not Applicable Employment type: Full-time Job function: Engineering and Information Technology Industries: Transportation, Logistics, Supply Chain and Storage Note Referrals increase your chances of interviewing at Circuit. Get notified about new Back End Developer jobs in Austin, TX. #J-18808-Ljbffr