Golang全栈工程师招聘 - 100%远程工作

这是一个非常吸引人的全栈工程师职位机会！Customer.io的技术栈（Go + Ember.js）和远程工作文化都很不错。从技术角度来看，这个职位对Go语言的要求很务实——虽然有经验者优先，但更看重学习能力。

以下是一个典型的Go后端服务示例，展示了这类项目中可能涉及的代码结构：

package main

import (
    "context"
    "database/sql"
    "encoding/json"
    "log"
    "net/http"
    "time"
    
    "github.com/go-chi/chi"
    "github.com/go-chi/chi/middleware"
    _ "github.com/go-sql-driver/mysql"
)

type NotificationService struct {
    db *sql.DB
}

type Notification struct {
    ID        int       `json:"id"`
    UserID    int       `json:"user_id"`
    Type      string    `json:"type"`
    Content   string    `json:"content"`
    Status    string    `json:"status"`
    CreatedAt time.Time `json:"created_at"`
}

func (s *NotificationService) SendNotification(ctx context.Context, n *Notification) error {
    query := `INSERT INTO notifications (user_id, type, content, status) VALUES (?, ?, ?, ?)`
    result, err := s.db.ExecContext(ctx, query, n.UserID, n.Type, n.Content, "pending")
    if err != nil {
        return err
    }
    
    id, err := result.LastInsertId()
    if err != nil {
        return err
    }
    
    n.ID = int(id)
    n.Status = "pending"
    n.CreatedAt = time.Now()
    
    // 异步处理通知发送
    go s.processNotification(n)
    
    return nil
}

func (s *NotificationService) processNotification(n *Notification) {
    // 模拟通知发送逻辑
    time.Sleep(100 * time.Millisecond)
    
    query := `UPDATE notifications SET status = ? WHERE id = ?`
    _, err := s.db.Exec(query, "sent", n.ID)
    if err != nil {
        log.Printf("Failed to update notification status: %v", err)
    }
}

func (s *NotificationService) GetUserNotifications(w http.ResponseWriter, r *http.Request) {
    userID := chi.URLParam(r, "userID")
    
    rows, err := s.db.QueryContext(r.Context(), 
        "SELECT id, user_id, type, content, status, created_at FROM notifications WHERE user_id = ? ORDER BY created_at DESC LIMIT 50",
        userID,
    )
    if err != nil {
        http.Error(w, err.Error(), http.StatusInternalServerError)
        return
    }
    defer rows.Close()
    
    var notifications []Notification
    for rows.Next() {
        var n Notification
        if err := rows.Scan(&n.ID, &n.UserID, &n.Type, &n.Content, &n.Status, &n.CreatedAt); err != nil {
            http.Error(w, err.Error(), http.StatusInternalServerError)
            return
        }
        notifications = append(notifications, n)
    }
    
    w.Header().Set("Content-Type", "application/json")
    json.NewEncoder(w).Encode(notifications)
}

func main() {
    // 数据库连接
    db, err := sql.Open("mysql", "user:password@tcp(localhost:3306)/customerio")
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()
    
    // 设置连接池
    db.SetMaxOpenConns(25)
    db.SetMaxIdleConns(25)
    db.SetConnMaxLifetime(5 * time.Minute)
    
    service := &NotificationService{db: db}
    
    r := chi.NewRouter()
    r.Use(middleware.Logger)
    r.Use(middleware.Recoverer)
    
    r.Route("/api/v1", func(r chi.Router) {
        r.Get("/users/{userID}/notifications", service.GetUserNotifications)
        
        r.Post("/notifications", func(w http.ResponseWriter, r *http.Request) {
            var n Notification
            if err := json.NewDecoder(r.Body).Decode(&n); err != nil {
                http.Error(w, err.Error(), http.StatusBadRequest)
                return
            }
            
            if err := service.SendNotification(r.Context(), &n); err != nil {
                http.Error(w, err.Error(), http.StatusInternalServerError)
                return
            }
            
            w.Header().Set("Content-Type", "application/json")
            w.WriteHeader(http.StatusCreated)
            json.NewEncoder(w).Encode(n)
        })
    })
    
    log.Println("Server starting on :8080")
    log.Fatal(http.ListenAndServe(":8080", r))
}

这个示例展示了Customer.io这类消息平台可能涉及的技术实现：

1. 使用chi路由器构建RESTful API
2. MySQL数据库操作和连接池配置
3. 异步处理消息发送
4. 标准化的错误处理和JSON响应

对于前端部分，Ember.js的典型组件可能如下：

// app/components/notification-list.js
import Component from '@glimmer/component';
import { action } from '@ember/object';
import { inject as service } from '@ember/service';

export default class NotificationListComponent extends Component {
  @service notifications;
  @service router;
  
  @action
  async sendNotification(content, type) {
    try {
      const response = await fetch('/api/v1/notifications', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ content, type, user_id: this.args.userId })
      });
      
      if (response.ok) {
        this.notifications.success('Notification sent successfully');
        this.router.refresh();
      }
    } catch (error) {
      this.notifications.error('Failed to send notification');
    }
  }
}

这个职位的技术挑战在于需要处理大规模的消息发送、确保系统的高可用性，同时保持前端用户体验的流畅性。Go的并发模型和性能特性非常适合处理这类高并发的消息处理场景。