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I want to become a Senior Backend Developer. What should I learn?

Great goal! Here's a structured plan to become a Senior Backend Developer:

Step 1: Master the Fundamentals

  • Deepen your understanding of data structures & algorithms
  • Learn system design principles (scalability, caching, load balancing)
  • Study database internals (indexing, query optimization, ACID vs BASE)

    • Step 2: Core Backend Technologies

  • Pick a primary language: **Python**, **Go**, or **Java** — Go is trending in 2026
  • Framework: FastAPI (Python), Gin (Go), or Spring Boot (Java)
  • Database: PostgreSQL (relational) + Redis (caching) + MongoDB (documents)

    • Step 3: DevOps & Infrastructure

  • Docker & Kubernetes — essential for modern backend roles
  • CI/CD pipelines (GitHub Actions, GitLab CI)
  • Cloud platforms: AWS (ECS, Lambda, RDS) or GCP

    • Step 4: Advanced Topics

  • Microservices architecture & API gateways
  • Message queues (Kafka, RabbitMQ)
  • Observability (logging, metrics, tracing with Prometheus + Grafana)

    • Resources:

  • System Design Interview (book)
  • "Designing Data-Intensive Applications" by Martin Kleppmann
  • Daily.dev for backend content

    • Your current skills match **Senior Frontend** development. Transitioning to backend will take 6-12 months of dedicated learning. Start with Python + FastAPI and build a REST API project.