Backend Engineer

About the Role: Every new AI service, cloud provider, and SaaS tool generates billing data in its own special snowflake format. Someone needs to wrangle this into something useful. That someone is you. You'll build the adapters that ingest cost data from OpenAI, Anthropic, and dozens of other vendors. Think of it as ETL for the modern era, where the "E" stands for "expensive cloud bills.”

You’ll work with real data scale from some of the best engineering teams in the world. It’s a small team, so your ability to have an impact on what we build and how quickly we make it will be unparalleled. You’ll also be working at the nexus of the most exciting area in technology right now: the full suite of AI products that are out there on the market, helping engineering teams (our customers) learn how to build profitability on them.

You Will

• Build resilient billing adapters that stay functional, even when vendors break their APIs

• Transform inconsistent vendor data into our internal format, without losing accuracy or your sanity

• Integrate with REST APIs that range from elegant to “why does this return XML?”

• Write clean, maintainable Python that your future self will thank you for at 2 a.m.

• Debug and maintain production data pipelines processing millions in daily cloud spend

• Review and collaborate on high-quality code with a seasoned engineering team

What You Bring

• Experience with billing systems or FinOps

• Knowledge of cloud provider APIs

• ETL/data pipeline background

• SaaS platform development

• Battle scars from production incidents

• Technical Skills

  • 2+ years in Python – You know the difference between a list and a generator

  • SQL fluency – Joins are second nature, and you wield CTEs with confidence

  • REST API integration – You’ve wrestled with rate limits, pagination, and inconsistent schemas

  • AWS knowledge – Especially Lambda, S3, and the billing intricacies they bring

  • Data transformation – You know how fragile things get when schemas change

  • Git proficiency – You write commit messages your teammates (and future you) understand

  • Testing mindset – Unit tests are part of your workflow, not an afterthought

• Professional Skills

  • Problem-solver – You debug with a method, not just hope

  • Clear communicator – You can explain technical decisions to non-technical teammates

  • Independent contributor – You can own a project end-to-end

  • Adaptable – New vendor APIs don’t rattle you

  • Team-oriented – You see code reviews as opportunities, not battlegrounds

Please note: CloudZero is unable to sponsor employment visas or provide immigration-related support now or in the future. All candidates must have current, unrestricted authorization to work in the United States permanently.