Senior Python Backend Engineer
Molecula
Software Engineering
Austin, TX, USA
Posted on Jul 30, 2025
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.
Key Responsibilities
- Overall responsibility for functional operation of our ML services
- Overall responsibility for ML tooling and how to solve tooling problems
- Significant contributor to Python codebase, focusing on ML infrastructure, observability, robustness, performance and accelerating feature-development
- Ensuring we use the right methodologies
Experience
- Experience running big Python codebases in production serving thousands of requests per second
- High level of comfort with async operation, multithreading, etc.
- Solid understanding of architecture and Python best practices
- Experience running web services at scale (FastAPI, Flask, or Django)
- Experience with batch processing systems (Airflow, Argo Workflows, Dagster)
- Experience managing ML workloads, pipelines, and infrastructure in production environmentsExperience with performance and memory optimization
- Leveraging AI-tools to speed up development and testing
- 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!