~/hailcpy

// 06 / stack

stack

Tools I've shipped with in production. Each section lists the surface, then a few lines tying the headline tools to a concrete thing on this site.

fundamentals

leetcode + codeforces1k+ problems solved

The DSA muscle behind the migrations, query-plan debugging, and protocol work below. Comfortable reaching for the right data structure before reaching for a framework.

languages

PythonTypeScriptRustC++
  • Rust - wrote the Blaze SDK that sustains ~15 MB/s of decoded EA wire traffic per active GameTools region.
  • Python - FastAPI gateway and worker pool behind the GameTools public stats APIs serving 1M+ req / day; plus the Simbian Django backend.
  • TypeScript - the GameTools manager + public stats frontends, and this site.

backend / data

PostgreSQLFastAPIDjangoRedisMongoDBTokioKafkaKubernetesAWSClickHouseNeo4jgRPCWebSockets
  • PostgreSQL - diagnosed a composite-index ordering bug in prod at Simbian via query-plan analysis; CPU 100% → 60%, p95 ~20×. Also validated the PgBouncer migration after connection-pool exhaustion under burst.
  • Django - own a slice of the Simbian backend: ORM models, REST views, auth and permissions around vendor connection lifecycle, action invocation, and audit + retry state.
  • Kafka - fans out Blaze fetches across the GameTools worker pool so live player views stay realtime under load.
  • AWS - EC2 fleets across Solvio.AI and Simbian; Bedrock for managed model access at Simbian.
  • Neo4j - knowledge-graph layer behind the Wells Fargo RAG dispute-resolution flow.

ai / ml

LangGraphLiteLLMPyTorchTensorRTStrandsTriton
  • LangGraph - RAG dispute-resolution flow at Wells Fargo, plus a generic agentic extraction system across 45k+ document types.
  • TensorRT / Triton - math-OCR inference at Solvio.AI; earlier real-time embedded vision on Jetson hardware.

observability

PrometheusGrafanaOpenTelemetryLangfuse
  • Prometheus + Grafana - normalised vendor-specific API errors into a single event shape at Simbian and built the cross-integration P95/P99 latency + error-rate dashboard with alerting.