Member of Technical Staff

About the Company

Beacon is acquiring and operating a portfolio of vertical SaaS companies. We are building a cross-portfolio datalake on open table formats, with a feature store, an action layer for workflows, and a feedback loop to capture every action and outcome. Beacon has raised $550M+ from investors including General Catalyst and Lightspeed.

Responsibilities

• Own a piece of the core stack end-to-end including design, implementation, operations, and technical direction
• Build and maintain the data platform using Iceberg with Snowflake or Databricks
• Develop core services and APIs for identity, access control, audit, and workflow orchestration
• Implement multi-tenant isolation across data, compute, and credential boundaries
• Build the workflow and action runtime for operational workflows
• Develop observability and evaluation harnesses including traces, metrics, and structured logs
• Design safety mechanisms, kill switches, and blast-radius caps for autonomous actions

Requirements

• Senior engineering depth equivalent to Staff or Principal level
• Proficiency in at least one of Python, Go, Rust, or TypeScript
• Deep intuition regarding distributed systems, idempotency, and partial failure
• Experience building or operating modern data stacks (Kafka, Spark, dbt, Iceberg, Snowflake, etc.)
• Platform mindset with a focus on developer experience and API design
• Ability to navigate ambiguity and make long-term architectural decisions
• Interest in modern ML and the ability to build infrastructure around models

Preferred Qualifications

• Prior Staff or Principal Engineer experience at a high-bar engineering organization
• Experience with Iceberg, Polaris, Snowflake, or Databricks at scale
• Multi-tenant SaaS or platform infrastructure background
• Production experience with LLM-driven systems, including evals and observability
• Background in offline RL, contextual bandits, or sequential decision-making
• Open-source contributions to data infrastructure or developer tooling