Senior Backend Engineer - Data Platform

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About the role

You'll architect and build the core backend systems powering our cloud cost optimization platform from day zero. You'll design the multi-tenant database architecture, develop high-performance APIs in Python and FastAPI, and design the AWS ETL pipelines that transform billing and usage data into structured cost insights for automated savings plan management.

What you'll do

• Build the backend for our 1-click AWS connection flow, design the database schema for multi-tenancy (SQL + Iceberg), and create the API architecture serving our web dashboard
• Develop the backend logic for our AI DevOps agent "Major Tom," including automated server scheduling, cost anomaly detection, and AWS invoice processing using Airflow, PySpark, and Trino
• Own critical architectural decisions that scale from startup to enterprise
• Work directly with AWS APIs, define a high-coverage testing framework, and implement CI/CD from day one to enable rapid iteration, seamless deployment, and high uptime
• Mentor peers, review designs, and drive architectural decisions for scalable, maintainable services

What you'll need

• Deep expertise in Python and FastAPI: You have built and operated production-grade systems end-to-end with clean, maintainable architecture
• Strong background in data processing and orchestration: You are hands-on with Pandas, PySpark, Airflow, and Trino for large-scale distributed data workflows
• Proven ability to design, optimise, and scale data infrastructure: You have architected SQL databases and Iceberg-based data lakes for performance, reliability, and cost efficiency
• Strong AWS experience: You know CloudFormation, cross-account IAM roles, billing/cost APIs, and automated infrastructure workflows by heart
• Led system design and delivery: You have mentored peers, reviewed designs, and driven architectural decisions for scalable, maintainable services
• Startup execution mindset: You have shipped 0→1 products fast with high ownership, autonomy, and accountability

What they offer

• Top market cash compensation plus meaningful equity upside
• Build production AI that changes how companies run cloud infrastructure
• Work with founders who've built unicorns and raised $1B+
• Zero to One opportunity to build standard infrastructure for startups
• In-person work in Berlin with relocation support

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