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OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Collection2 items
01Database & TypeORM
02Authentication & Middleware
Software · L3 · NestJS
@openstem
Software · L3 · NestJSCollection2 items
01Schema Design & Modeling
02Replication & Transactions
Software · L3 · MongoDB
@openstem
Software · L3 · MongoDBCollection2 items
01Transactions & MVCC
02Performance Tuning
Software · L3 · PostgreSQL
@openstem
Software · L3 · PostgreSQLCollection2 items
01Serverless & Lambda
02Storage & Content Delivery
Software · L3 · AWS
@openstem
Software · L3 · AWSCollection2 items
01Data & Analytics (BigQuery)
02Architecture & Scale
Software · L3 · Google Cloud
@openstem
Software · L3 · Google CloudCollection2 items
01Workflows & Best Practices
02Advanced State & Scaling
Software · L3 · Terraform
@openstem
Software · L3 · TerraformCollection4 items
01API Design & REST
02Software · L3 · API Design & REST
03Software · L3 · Choosing an HTTP Method and Status Code
+1 moreSoftware · L3 · API Design & REST
@openstem
Software · L3 · API Design & RESTCollection4 items
01Caching Strategies
02Software · L3 · Caching Strategies
03Software · L3 · Choosing a Caching Strategy
+1 moreSoftware · L3 · Caching Strategies
@openstem
Software · L3 · Caching StrategiesCollection4 items
01Functional Programming Concepts
02Software · L3 · Functional Programming Concepts
03Software · L3 · Is This Function Pure?
+1 moreSoftware · L3 · Functional Programming
@openstem
Software · L3 · Functional ProgrammingCollection4 items
01Regular Expressions & Text Parsing
02Software · L3 · Regular Expressions & Text Parsing
03Software · L3 · Regex or Real Parser?
+1 moreSoftware · L3 · Regex & Text Parsing
@openstem
Software · L3 · Regex & Text ParsingCollection4 items
01GraphQL API Design
02Software · L3 · GraphQL API Design
03Software · L3 · GraphQL Request Lifecycle
+1 moreSoftware · L3 · GraphQL API Design
@openstem
Software · L3 · GraphQL API DesignCollection4 items
01Message Queues & Event-Driven Communication
02Software · L3 · Message Queues & Event-Driven Communication
03Software · L3 · Message Delivery and Failure Handling
+1 moreSoftware · L3 · Message Queues & Event-Driven Communication
@openstem
Software · L3 · Message Queues & Event-Driven CommunicationCollection3 items
01Software · L4 · DS&A — Core Structures
02Software · L4 · Big-O complexity cheat sheet
03Software · L4 · Time complexity — 10 Q
Software · L4 · Data Structures & Algorithms
@openstem
Software · L4 · Data Structures & AlgorithmsCollection2 items
01Engine Internals
02Concurrency & Advanced Patterns
Software · L4 · JavaScript
@openstem
Software · L4 · JavaScriptCollection2 items
01Compiler & Config
02Advanced Patterns
Software · L4 · TypeScript
@openstem
Software · L4 · TypeScriptCollection2 items
01Concurrency
02Advanced Python
Software · L4 · Python
@openstem
Software · L4 · PythonCollection2 items
01Concurrent React & Internals
02Patterns & Architecture
Software · L4 · React
@openstem
Software · L4 · ReactCollection2 items
01Advanced Structures
02Algorithm Design & Analysis
Software · L4 · Data Structures & Algos
@openstem
Software · L4 · Data Structures & AlgosCollection2 items
01Distributed Systems Deep Dive
02System Design Practice
Software · L4 · System Design
@openstem
Software · L4 · System DesignCollection2 items
01Query Optimization & Execution Plans
02Transactions, Isolation & Concurrency
Software · L4 · SQL
@openstem
Software · L4 · SQLCollection2 items
01Git Internals: Objects, Refs & Plumbing
02History Rewriting, Recovery & Advanced Workflows
Software · L4 · Git & Dev Workflow
@openstem
Software · L4 · Git & Dev WorkflowCollection2 items
01Runtime & Scheduler
02GC, Memory & Performance
Software · L4 · Go
@openstem
Software · L4 · GoCollection2 items
01Unsafe, FFI & Raw Pointers
02Async Internals, Pin & Variance
Software · L4 · Rust
@openstem
Software · L4 · RustCollection2 items
01JVM Internals & Performance
02Modern Java & Memory Model
Software · L4 · Java
@openstem
Software · L4 · JavaCollection2 items
01Browser Rendering & Performance
02CSS Cascade, Layout Internals & Architecture
Software · L4 · HTML & CSS
@openstem
Software · L4 · HTML & CSSCollection2 items
01Internals & Architecture
02Production Node
Software · L4 · Node.js
@openstem
Software · L4 · Node.jsCollection2 items
01HTTP/2, HTTP/3 & QUIC
02CDNs, Anycast & BGP
Software · L4 · Networking & HTTP
@openstem
Software · L4 · Networking & HTTPCollection2 items
01Kernel Internals
02Advanced OS Concepts
Software · L4 · Operating Systems
@openstem
Software · L4 · Operating SystemsCollection2 items
01Lock-Free & Memory Models
02Concurrency Patterns
Software · L4 · Concurrency
@openstem
Software · L4 · ConcurrencyCollection2 items
01Threat Modeling & Zero Trust
02Secure SDLC & Supply-Chain Security
Software · L4 · Security & Auth
@openstem
Software · L4 · Security & Auth