$ telemetry --watch --core
$ telemetry --watch --core
001 / Flagshipθ HOT · IN ACTIVE MEMORY The systems shelf
001Active development
C++26 · CMake · TSAN / ASAN · Google Benchmark
An embedded key-value storage engine, built from the allocator up.
C++26TSAN-validated, 16-thread stressNUMA-aware
A ground-up storage engine focused on concurrency safety, memory locality, and predictable performance under multithreaded load.
- NUMA-aware arena allocator with thread-local allocation buffers and mmap huge-page fallback
- Lock-free skip-list MemTable — CAS insertion with append-versioned MVCC ordering
- Epoch-based reclamation with per-thread 4 KiB slabs for safe concurrent reads
- WAL staging with CRC32C / XXH3-128 integrity and Vyukov MPSC queue handoff
002
Java 24 · NIO · Maven
A Redis-compatible server on a single-threaded event loop.
81K GET ops/s68K SET ops/sp99 ≤ 3.1 ms @ 50 clients
A from-scratch Redis-compatible server: one NIO event loop, direct ByteBuffer access, no thread contention, low GC pressure.
- 29+ commands across strings, lists, sorted sets, geospatial, streams, and pattern-matched pub/sub
- Custom QuickList and SkipList data structures backing lists and sorted sets
- PSYNC replication — RDB snapshot on initial sync, async incremental streaming
- Per-replica lag tracking via REPLCONF GETACK, WAIT-based sync guarantees
003
Java 21 · Spring Boot · PostgreSQL · Stripe
A booking platform that refuses to double-book.
0 double-bookings by design~1M parked connections/JVM10+ architecture docs
High-concurrency cinema ticketing where financial consistency wins every trade-off — designed documentation-first.
- Zero double-bookings via SELECT FOR UPDATE with strict lock ordering; hot-seat throughput analytically bounded by lock-commit latency
- Java 21 virtual threads park ~1M connections per JVM, isolating the 20-connection Hikari pool as the sole bottleneck
- Exactly-once payments through idempotent Stripe webhook processing
- Background jobs release held seats on a 5-minute timer and trigger notifications
002 / Notableθ WARM · CACHED Built to solve something specific
Rust · Axum · DragonflyDB · Docker
Rust URL shortener with a 4-layer NUMA-aware cache hitting >95% — ~50K RPS on 8 GB commodity hardware.
Open case study →
FastAPI · LangChain · ChromaDB · Gemini · TypeScript
Stateless medical RAG that routes queries by automated severity assessment, with guardrails against diagnostic hallucination.
Open case study →
Python · Polars · Qwen3-4B · Parquet
Two-stage ranking pipeline built for the Redrob Hackathon v4 — GPU judgments frozen offline, CPU-only scoring at query time.
Open case study →
Next.js · PostgreSQL · Razorpay · Clerk · Botpress
Full-stack museum booking — idempotent Razorpay payments, admin analytics, and automated support workflows.
Open case study →
003 / Earlierθ COLD · IMMUTABLE Where it started
TypeScript · Python
Threat-intelligence visualization for the MISP platform, rebuilt from a fork into a modern TypeScript + Python stack.
Open case study →
Python · Jupyter · scikit-learn
Machine-learning notebooks predicting disease outbreak risk — the most-starred repo on the account.
Open case study →
Next.js · Prisma · Ant Design
Quiz creation and play with persistent scoring — an early full-stack build that still runs live on Vercel.
Open case study →
001 / Flagshipθ HOT · IN ACTIVE MEMORY The systems shelf
001Active development
C++26 · CMake · TSAN / ASAN · Google Benchmark
An embedded key-value storage engine, built from the allocator up.
C++26TSAN-validated, 16-thread stressNUMA-aware
A ground-up storage engine focused on concurrency safety, memory locality, and predictable performance under multithreaded load.
- NUMA-aware arena allocator with thread-local allocation buffers and mmap huge-page fallback
- Lock-free skip-list MemTable — CAS insertion with append-versioned MVCC ordering
- Epoch-based reclamation with per-thread 4 KiB slabs for safe concurrent reads
- WAL staging with CRC32C / XXH3-128 integrity and Vyukov MPSC queue handoff
002
Java 24 · NIO · Maven
A Redis-compatible server on a single-threaded event loop.
81K GET ops/s68K SET ops/sp99 ≤ 3.1 ms @ 50 clients
A from-scratch Redis-compatible server: one NIO event loop, direct ByteBuffer access, no thread contention, low GC pressure.
- 29+ commands across strings, lists, sorted sets, geospatial, streams, and pattern-matched pub/sub
- Custom QuickList and SkipList data structures backing lists and sorted sets
- PSYNC replication — RDB snapshot on initial sync, async incremental streaming
- Per-replica lag tracking via REPLCONF GETACK, WAIT-based sync guarantees
003
Java 21 · Spring Boot · PostgreSQL · Stripe
A booking platform that refuses to double-book.
0 double-bookings by design~1M parked connections/JVM10+ architecture docs
High-concurrency cinema ticketing where financial consistency wins every trade-off — designed documentation-first.
- Zero double-bookings via SELECT FOR UPDATE with strict lock ordering; hot-seat throughput analytically bounded by lock-commit latency
- Java 21 virtual threads park ~1M connections per JVM, isolating the 20-connection Hikari pool as the sole bottleneck
- Exactly-once payments through idempotent Stripe webhook processing
- Background jobs release held seats on a 5-minute timer and trigger notifications
002 / Notableθ WARM · CACHED Built to solve something specific
Rust · Axum · DragonflyDB · Docker
Rust URL shortener with a 4-layer NUMA-aware cache hitting >95% — ~50K RPS on 8 GB commodity hardware.
Open case study →
FastAPI · LangChain · ChromaDB · Gemini · TypeScript
Stateless medical RAG that routes queries by automated severity assessment, with guardrails against diagnostic hallucination.
Open case study →
Python · Polars · Qwen3-4B · Parquet
Two-stage ranking pipeline built for the Redrob Hackathon v4 — GPU judgments frozen offline, CPU-only scoring at query time.
Open case study →
Next.js · PostgreSQL · Razorpay · Clerk · Botpress
Full-stack museum booking — idempotent Razorpay payments, admin analytics, and automated support workflows.
Open case study →
003 / Earlierθ COLD · IMMUTABLE Where it started
TypeScript · Python
Threat-intelligence visualization for the MISP platform, rebuilt from a fork into a modern TypeScript + Python stack.
Open case study →
Python · Jupyter · scikit-learn
Machine-learning notebooks predicting disease outbreak risk — the most-starred repo on the account.
Open case study →
Next.js · Prisma · Ant Design
Quiz creation and play with persistent scoring — an early full-stack build that still runs live on Vercel.
Open case study →