6 posts on System Design.
The full boxes and arrows behind my portfolio phone number. LiveKit, Deepgram STT, Groq LLM with three tools, Cartesia TTS, and roughly two cents per minute.
A WebRTC voice interface that had to survive a corporate proxy blocking UDP. Token flow, TURN-over-TLS defaults, and why mic-permissions ate my week.
The full design of the SIH 2022 evidence indexer for MP Police, how each modality was handled with its own OCR/ASR family, merged into a single TF-IDF index, and served through one query surface.
The end-to-end architecture of a privacy-preserving RAG at SAP Labs: preprocessing, HNSW retrieval, metadata pre-filter, PII redaction, generation, audit trail.
The LRU state machine is one component. This is the whole vault, Postgres AEAD rows, the Fly.io API, cert handshake, dashboard, and the /metrics endpoint.
The architecture behind the Go client, local socket, encrypted cache, async refresh, vault-outage fallback, and the canary rollout that caught the bugs.
