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Senior Software Engineer, Billie AI team

CollectlyRevenue Cycle company
BelgradeSenior
Sapphire Ventures logo
Sapphire Ventures
Y Combinator logo
Y Combinator
Wayfinder Ventures
Burst Capital
Cabra VC
Davidovs Venture Collective
Data & AI

About the role

TL;DR

Senior Software Engineer to build and improve AI voice and chat agents.

  • •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.
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Required skills

PythonPostgreSQLSQLLLMs

Nice-to-have skills

LangChain

Tech stack

PythonPostgreSQLSQLLLMs

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