As a fresher joining a company with microservices, what should you expect?

Direct Answer

What a fresher does depends on the company. In a microservice environment, a useful starting point is one service's responsibility, API/event contracts, local run and test workflow, logs/traces, deployment pipeline, and ownership boundaries. Docker or REST may be used, but neither is guaranteed; ask which runtime, protocols, and on-call practices the team actually uses.

Code Example

@Service
public class OrderService {
    private final WebClient inventoryClient;

    public OrderService(WebClient.Builder builder) {
        this.inventoryClient = builder.baseUrl("http://inventory-service").build();
    }

    public Order createOrder(OrderRequest request) {
        // Call InventoryService to check stock
        var stockResponse = inventoryClient.get()
            .uri("/api/inventory/{productId}", request.productId())
            .retrieve()
            .bodyToMono(StockResponse.class)
            .block(); // Blocking call for simplicity

        if (stockResponse.available() < request.quantity()) {
            throw new OutOfStockException("Not enough inventory");
        }

        var order = new Order(request.productId(), request.quantity(), "PENDING");
        return orderRepository.save(order);
        // In real code, you'd also call InventoryService to reserve stock
    }
}

Common Mistakes & Pitfalls

• Trying to learn everything at once: Freshers feel overwhelmed seeing twenty microservices in the architecture diagram and try to understand all of them. Focus on your service and the two or three it directly talks to. Understanding the entire system comes over months, not weeks.
• Not asking about deployment: Freshers write code but don't learn how it gets to production—what CI/CD pipeline runs, what tests must pass, how rollback works. Ask your mentor to walk you through the deployment process in your first week.
• Ignoring observability tools: Freshers rely on print statements and local debugging but don't learn Grafana dashboards or log aggregation tools like ELK. In production, you can't attach a debugger—you need logs, metrics, and traces. Ask teammates how they debug production issues and shadow them during an incident.