Member of Technical Staff - Engineering Lead, Data Platform

Reflection is building the trusted data backbone for the world's most capable open-weight AI systems. The Data Platform team builds and operates the core data systems and pipelines that power our research, training, and production environments — unifying ingestion, processing, and orchestration across the entire data lifecycle so every team can move faster.

Responsibilities

Build, mentor, and grow a team of ~10 exceptional data platform engineers; Guide the technical direction across the platform: ingestion and orchestration patterns for batch and streaming workloads, scalable compute and storage foundations, and reproducible pipelines with versioning, backfills, and isolated execution environments; Work closely with research, training, and production teams to enable high-velocity experimentation on a unified data layer; Establish trusted data quality, lineage, and governance signals so teams can make confident production decisions; Keep cost and performance predictable through guardrails, budgets, and continuous system tuning; Stay hands-on: design reviews, architecture decisions, and code where it matters most

Requirements

8+ years of engineering experience with a strong data engineering foundation; Shipped and owned production-grade pipelines at large scale (tens of TBs to PBs daily); Track record as a staff/principal-level individual contributor before moving into leadership; Managed and grown a team (~5-10) or demonstrated leadership readiness to build one quickly; Deep in at least one of: ingestion & orchestration at scale, storage and processing engines (lakehouse formats, query engines), or data quality/lineage/reproducibility systems; Fluent in the modern data stack; Thrive in a high-agency, fast-paced environment; Collaborative, clear communicator comfortable working across research and infrastructure boundaries

Benefits

Top-tier compensation: Salary and equity structured to recognize and retain our talent globally; Stock options; Comprehensive medical, dental, vision, and life; Annual wellness allowance; Lunch and dinner provided in the office daily; 22 weeks paid parental leave for all new birthing and non-birthing parents, including adoptive and surrogate journeys; Unlimited paid time off in the U.S. and 30 days in the U.K.; Visa sponsorship support; Regular off-sites, happy hours, and team celebrations