Production Architecture & AI Engineering Guides
Deep technical blueprints authored by Rohini engineers covering distributed infrastructure, applied RAG/AI systems, and HLD/LLD testing patterns.
Distributed Messaging
Apache Kafka Event-Driven Architecture in Production
Production guide to Apache Kafka partitions, consumer group rebalancing, dead-letter queues (DLQ), idempotent producers, and exactly-once semantics.
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Caching & Traffic Control
Redis Caching & Distributed Rate Limiter Design
Production patterns for Redis distributed rate limiting (Token Bucket & Sliding Window Log) using atomic Lua scripts and cache stampede prevention.
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High-Throughput NoSQL
ScyllaDB High-Throughput NoSQL Data Modeling
Query-first wide-column modeling in ScyllaDB: shard-per-core architecture, high-cardinality partition keys, clustering keys, and avoiding hot partitions.
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Containers & Orchestration
Kubernetes & Docker Production Orchestration
Production Kubernetes and Docker blueprint: multi-stage distroless builds, HPA autoscaling, readiness/liveness probes, PDBs, and zero-downtime rollouts.
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Cloud & Security
AWS Cloud Architecture Patterns for Production
Multi-AZ AWS VPC isolation, public/private/data subnets, EKS/ECS workloads, IAM least-privilege IRSA, and NAT cost optimization.
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Applied AI & RAG
Production RAG Pipeline Architecture: Hybrid Search, Reranking & Guardrails
How to build production RAG pipelines: hybrid BM25 + dense vector search, Reciprocal Rank Fusion, cross-encoder reranking, and citation guardrails.
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RAG Ingestion
Document Chunking Strategies & Embedding Dimensionality
Engineering guide to semantic chunking, recursive character splitting, parent-document retrieval, and embedding dimensionality trade-offs (768 vs 1536 vs 3072).
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Vector Indexing
Vector Database Selection & Indexing (HNSW vs IVF, pgvector vs Qdrant)
Deep comparison of HNSW vs IVF-PQ indexing, pre-filtering vs post-filtering metadata, and choosing between pgvector, Qdrant, and Pinecone.
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Agentic Systems
AI Agent Memory & Deterministic Tool Execution
Designing production AI agents: bounded ReAct loops, JSON Schema tool contracts, idempotency keys, short-term vs long-term memory, and human approval gates.
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System Design (HLD)
High-Level Design (HLD) Patterns: Load Balancing, Sharding & CQRS
Master production High-Level Design (HLD): L4/L7 load balancing, consistent hashing with virtual nodes, horizontal database sharding, and CQRS.
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System Design (LLD)
Low-Level Design (LLD) Patterns: SOLID, Concurrency & Contracts
Practical Low-Level Design (LLD): SOLID interfaces, optimistic vs pessimistic concurrency control, idempotent state machines, and schema normalization.
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QA & Reliability
Testing Pyramid: Unit, Integration, E2E & k6 Load Testing
Production QA architecture: deterministic unit tests, Testcontainers integration suites, Playwright E2E, k6 load/spike testing, and CI/CD quality gates.
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