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OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Collection4 items
01Documents & Queries
02CRUD & Operators
03Software · L1 · MongoDB: Schema Design — Embedding vs Referencing
+1 moreSoftware · L1 · MongoDB
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Software · L1 · MongoDBCollection4 items
01Postgres Features
02PostgreSQL Basics
03Software · L1 · PostgreSQL: Full-Text Search
+1 moreSoftware · L1 · PostgreSQL
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Software · L1 · PostgreSQLCollection4 items
01Core Services
02Cloud Fundamentals
03Software · L1 · AWS: Storage Options Compared
+1 moreSoftware · L1 · AWS
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Software · L1 · AWSCollection4 items
01Core Services
02Cloud Fundamentals
03Software · L1 · Google Cloud: Storage & Database Options
+1 moreSoftware · L1 · Google Cloud
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Software · L1 · Google CloudCollection4 items
01Terraform Fundamentals
02IaC Fundamentals
03Software · L1 · Terraform: The Core Workflow
+1 moreSoftware · L1 · Terraform
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Software · L1 · TerraformCollection7 items
01Software · L2 · Loops: Doing Things Again and Again
02Software · L2 · Variables: Labelled Boxes for Values
03Software · L2 · How the Internet Works
+4 moreSoftware · L2 · Patterns & Practice
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Software · L2 · Patterns & PracticeCollection4 items
01Closures & Scope
02Prototypes & Classes
03Software · L2 · JavaScript: The Event Loop
+1 moreSoftware · L2 · JavaScript
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Software · L2 · JavaScriptCollection5 items
01Generics & Utility Types
02Patterns & Best Practices
03Modules & Declaration Files
+2 moreSoftware · L2 · TypeScript
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Software · L2 · TypeScriptCollection4 items
01Comprehensions & Iteration
02OOP & Classes
03Software · L2 · Python: classmethod, staticmethod, or Instance Method?
+1 moreSoftware · L2 · Python
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Software · L2 · PythonCollection4 items
01Hooks
02State & Context
03Software · L2 · React: Effect Lifecycle
+1 moreSoftware · L2 · React
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Software · L2 · ReactCollection5 items
01Trees & BST
02Structures & Trade-offs
03Sorting Algorithms
+2 moreSoftware · L2 · Data Structures & Algos
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Software · L2 · Data Structures & AlgosCollection4 items
01CAP & Consistency
02Caching
03Software · L2 · System Design: Choosing a Cache Strategy
+1 moreSoftware · L2 · System Design
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Software · L2 · System DesignCollection4 items
01Indexes & Performance
02Window Functions
03Software · L2 · SQL: Isolation Levels & Locking
+1 moreSoftware · L2 · SQL
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Software · L2 · SQLCollection4 items
01Collaboration & PR Workflow
02Branching & Merging
03Software · L2 · Git & Dev Workflow: Resolving a Merge Conflict
+1 moreSoftware · L2 · Git & Dev Workflow
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Software · L2 · Git & Dev WorkflowCollection5 items
01Goroutines & Channels
02Types & Interfaces
03Errors & Idioms
+2 moreSoftware · L2 · Go
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Software · L2 · GoCollection4 items
01Enums & Error Handling
02Traits & Generics
03Software · L2 · Rust: Option, Result, or panic!?
+1 moreSoftware · L2 · Rust
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Software · L2 · RustCollection5 items
01OOP & Collections
02Generics & Exceptions
03Streams & Functional
+2 moreSoftware · L2 · Java
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Software · L2 · JavaCollection4 items
01Responsive & Modern CSS
02Accessibility & ARIA
03Software · L2 · HTML & CSS: Computing an Element's Accessible Name
+1 moreSoftware · L2 · HTML & CSS
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Software · L2 · HTML & CSSCollection4 items
01Streams & Buffers
02HTTP & Servers
03Software · L2 · Node.js: HTTP Middleware Pipeline
+1 moreSoftware · L2 · Node.js
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Software · L2 · Node.jsCollection4 items
01Web Protocols
02Cookies, Sessions & Auth
03Software · L2 · Networking & HTTP: OAuth 2.0 Authorization Code Flow
+1 moreSoftware · L2 · Networking & HTTP
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Software · L2 · Networking & HTTPCollection4 items
01Memory Management
02CPU Scheduling
03Software · L2 · Operating Systems: Choosing a CPU Scheduling Algorithm
+1 moreSoftware · L2 · Operating Systems
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Software · L2 · Operating SystemsCollection4 items
01Synchronization Primitives
02Deadlocks & Race Conditions
03Software · L2 · Concurrency: Choosing a Synchronization Primitive
+1 moreSoftware · L2 · Concurrency
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Software · L2 · ConcurrencyCollection5 items
01Web Security
02Cryptography Basics
03OWASP & Injection Attacks
+2 moreSoftware · L2 · Security & Auth
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Software · L2 · Security & AuthCollection4 items
01Kubernetes
02CI/CD Pipelines
03Software · L2 · Docker & Kubernetes: CI/CD Pipeline Stages
+1 moreSoftware · L2 · Docker & Kubernetes
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Software · L2 · Docker & KubernetesCollection4 items
01Unit Testing & Mocking
02Integration & E2E
03Software · L2 · Testing: CI Test Execution Strategy
+1 moreSoftware · L2 · Testing
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Software · L2 · TestingCollection5 items
01Structural Patterns
02SOLID Principles
03Behavioral Patterns
+2 moreSoftware · L2 · Design Patterns
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Software · L2 · Design PatternsCollection4 items
01Web & REST Controllers
02Spring Boot & Autoconfiguration
03Software · L2 · Spring Boot: Data Access & Transactions
+1 moreSoftware · L2 · Spring Boot
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Software · L2 · Spring BootCollection6 items
01Null Safety
02Async & Futures
03Collections & Generics
+3 moreSoftware · L2 · Dart
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Software · L2 · DartCollection5 items
01Layout & Constraints
02Navigation & Routing
03State Management
+2 moreSoftware · L2 · Flutter
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Software · L2 · FlutterCollection4 items
01Data & Optimization
02App Router & Server Components
03Software · L2 · Next.js: Middleware & Edge Runtime
+1 moreSoftware · L2 · Next.js
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Software · L2 · Next.js