Senior Software Engineer - Observe by Snowflake, Indexing and Query Execution

Snowflake Snowflake · Data AI · Zurich-MSO, Switzerland · Engineering

This role focuses on optimizing the query execution service for an AI-powered observability platform. The engineer will be responsible for improving query performance, caching strategies, and incremental execution, as well as diagnosing and resolving customer-reported latency issues. The role requires deep expertise in distributed systems and database performance at scale, with a focus on ensuring the reliability and efficiency of the platform.

What you'd actually do

  1. Own and evolve the query execution service, including query caching, incremental execution, query rewrites, and decomposition strategies
  2. Systematically analyze large volumes of user and system-generated queries to identify performance bottlenecks and drive improvements
  3. Investigate and resolve customer-reported query latency issues, including acting as a first responder during new deal evaluations where query performance is under scrutiny
  4. Work on automated tuning of system parameters to reduce query execution times and costs
  5. Partner with Snowflake engineering and product teams to advocate for platform improvements, communicate requirements clearly, and drive resolutions

Skills

Required

  • 5+ years of industry experience building distributed systems
  • Hands-on experience working below the query interface, on the execution machinery itself (e.g., query planning, caching, rewrite rules, execution engines)
  • Proven ability to diagnose and resolve database performance issues at scale, including both systematic analysis across large query populations and deep-dive debugging of individual cases
  • Strong understanding of algorithms, distributed systems architecture, and backend infrastructure
  • Ability to rapidly onboard to complex, unfamiliar systems and deliver meaningful improvements
  • Customer-focused mindset: able to translate user-reported performance problems into technical root causes and durable fixes
  • Strong communication skills for working with internal and external stakeholders (including partner engineering teams at Snowflake)

Nice to have

  • Experience with Snowflake or other cloud data warehouses
  • Prior work on observability, monitoring, or telemetry platforms
  • Experience with OLAP query optimization, columnar storage, or vectorized execution
  • Advanced degree in Computer Science with a focus on databases or systems

What the JD emphasized

  • query execution service
  • query performance
  • customer evaluations
  • new deal cycles
  • performance analysis at scale
  • query execution pipeline