Senior Software Engineer, Billie AI team

Key responsibilities

What you'll do

• Build and improve AI voice and chat agents that handle thousands of patient conversations every day.
• Work on real-time systems where low latency, high concurrency, and reliability are critical.
• Develop AI-powered cost estimation algorithms using LLMs and statistical analysis of historical data.
• Analyze production data, identify patterns, form hypotheses, test hypotheses, improve accuracy.
• Design backend systems that handle high traffic, external integrations, and complex workflows.
• Own features end to end. From understanding the business problem to implementation, production monitoring, and measuring results.
• Build metrics and dashboards to understand how our products perform and where they need improvement.
• Make pragmatic engineering decisions. Know when to move fast and when correctness and reliability cannot be compromised.
• Challenge product ideas, propose better solutions, and defend your decisions with data and business reasoning.

Required qualifications

What we're looking for

• Strong Python and PostgreSQL experience.
• Solid system design skills. Ability to make and explain architectural decisions.
• Experience with data analysis, SQL, and building metrics to support decisions.
• Experience using AI coding tools in your daily workflow.
• Strong product and business thinking -- Ability to understand business requirements, evaluate trade-offs, and make decisions based on customer and business impact.
• End-to-end ownership -- Experience taking projects from initial requirements through design, implementation, deployment, and measuring results.

Nice to have

• Experience writing and evaluating prompts for production AI systems.
• Experience building AI-powered products.