Staff+ Engineering Evaluation Rubric
Technical Assessment & Coding Challenge Grader
Objective, criteria-driven assessment scorecards for Staff/Principal platform engineer take-home projects, systems design, and architecture defenses.
Overall Score98/100
Dimension 01
Production Correctness & Concurrency Safety
Weight: 25%Score: 100/100
Flawless execution of atomic database transactions, PostgreSQL RLS kernel policies, and race-condition immunity.
Dimension 02
System Architecture & Vector Search Scalability
Weight: 25%Score: 98/100
Exceptional mastery of PostGIS spatial indexing + pgvector HNSW cosine similarity delivering sub-40ms retrieval over 50k+ records.
Dimension 03
Technical Governance & RFC Authoring
Weight: 25%Score: 96/100
Clear architectural decision records (ADRs) and comprehensive RFC documentation with rigorous trade-off evaluations.
Dimension 04
Delivery Velocity & Cross-Functional Leadership
Weight: 25%Score: 98/100
Proven leadership of 15-engineer squads with continuous 2-week zero-regression delivery and accredited credentials (Google PM, McKinsey Forward).