Designing Resilient Systems: High Availability and SRE Foundations

In modern software development, a "Service Unavailable" error can cost businesses significant revenue and damage user trust. Building systems that remain operational during hardware failures, network partitions, and traffic spikes is an essential skill for modern software engineers and systems administrators. This text-based course guides you through the foundational concepts of Site Reliability Engineering (SRE) and resilient system design. You will transition from writing simple applications to planning, structuring, and maintaining highly available software architectures that survive real-world failures. What you'll learn: - Understand core reliability metrics including SLAs, SLOs, SLIs, and error budgets - Design fault-tolerant architectures using redundancy, load balancing, and failover strategies - Implement software resilience patterns such as circuit breakers, retries with exponential backoff, and rate limiting - Configure modern observability, logging, and monitoring to detect anomalies before they impact users - Apply disaster recovery strategies including multi-region deployments and database replication - Practice analyzing system bottlenecks and planning for horizontal scalability You will start by mastering foundational definitions of uptime, fault tolerance, and reliability metrics. From there, the written modules walk you through concrete architectural patterns, hands-on scenario analyses, and modern observability practices to keep your services running smoothly. This course is designed for junior developers, aspiring DevOps engineers, and system administrators who want to transition into site reliability and robust system design. No prior SRE experience is required. Begin reading today to build software that stands resilient against any failure.