Custom Ranking

The custom ranking feature allows you to introduce your own business logic to control the ranking of jobs returned by Cloud Talent Solution. A job seeker searching on a site can set their search query and other filters as always, and you can add a ranking expression to the search request. Cloud Talent Solution determines the relevant jobs to the query defined by the job seeker, and ranks the results based on the custom ranking expression. This ranked list is then returned to you so that you can display it to the job seeker. A video tutorial on implementing custom ranking is also available.

Benefits

Custom ranking allows you to control on how the results are listed. Using a custom ranking lets you define weights you can assign to custom attributes. You can use a combination of weights and custom attributes to build a custom ranking expression to determine the order the returned listings.

Custom ranking is built on the existing search service. It leverages the values provided in any customer-defined combination of the custom attributes.

Example use case

The end user searches for "Software Engineer". Your business wants to showcase higher return listings for "Software Engineer". Using Custom Ranking allows you to place a value on these listings and show them to the end user in the order determined by the custom ranking expression.

For example, you have two nearly identical job listings with job-A having a higher cost per click (CPC) value than job-B. You can use custom ranking to increase the visibility of job-A by setting the adjusting the ranking of the CPC custom attribute with weights.

How to use

Custom ranking supports the following mathematical operators: +, -, *, /, (, )

You can use the field names of custom attributes and these mathematical operators to define a custom ranking expression.

For example, consider that you have two custom attributes: CPC and freshness, where freshness is the number of days since the job was posted. You want to rank jobs by CPC and freshness, where CPC counts for 75% of the ranking and freshness counts for 25%. You can create a custom ranking expression as follows:

(0.75*CPC) + (0.25 *Freshness)

Code Sample

The following example creates a custom ranking expression using two custom attributes, cpc_value and freshness_value. It sets the custom ranking expression to (cpc_value / 2) - freshness_value.

Go

To learn how to install and use the client library for CTS, see CTS client libraries. For more information, see the CTS Go API reference documentation.

To authenticate to CTS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"
	"io"

	talent "cloud.google.com/go/talent/apiv4beta1"
	"cloud.google.com/go/talent/apiv4beta1/talentpb"
)

// customRankingSearch searches for jobs based on custom ranking.
func customRankingSearch(w io.Writer, projectID, companyID string) error {
	ctx := context.Background()

	// Initialize a jobService client.
	c, err := talent.NewJobClient(ctx)
	if err != nil {
		return fmt.Errorf("taleng.NewJobClient: %w", err)
	}
	defer c.Close()

	// Construct a searchJobs request.
	req := &talentpb.SearchJobsRequest{
		Parent: fmt.Sprintf("projects/%s", projectID),
		// Make sure to set the RequestMetadata the same as the associated
		// search request.
		RequestMetadata: &talentpb.RequestMetadata{
			// Make sure to hash your userID.
			UserId: "HashedUsrID",
			// Make sure to hash the sessionID.
			SessionId: "HashedSessionID",
			// Domain of the website where the search is conducted.
			Domain: "www.googlesample.com",
		},
		JobQuery: &talentpb.JobQuery{
			Companies: []string{fmt.Sprintf("projects/%s/companies/%s", projectID, companyID)},
		},
		// More info on customRankingInfo.
		// https://godoc.org/google.golang.org/genproto/googleapis/cloud/talent/v4beta1#SearchJobsRequest_CustomRankingInfo
		CustomRankingInfo: &talentpb.SearchJobsRequest_CustomRankingInfo{
			ImportanceLevel:   talentpb.SearchJobsRequest_CustomRankingInfo_EXTREME,
			RankingExpression: "(someFieldLong + 25) * 0.25",
		},
		OrderBy: "custom_ranking desc",
	}

	resp, err := c.SearchJobs(ctx, req)
	if err != nil {
		return fmt.Errorf("SearchJobs: %w", err)
	}

	for _, job := range resp.GetMatchingJobs() {
		fmt.Fprintf(w, "Job: %q\n", job.GetJob().GetName())
	}

	return nil
}

Java

To learn how to install and use the client library for CTS, see CTS client libraries. For more information, see the CTS Java API reference documentation.

To authenticate to CTS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import com.google.cloud.talent.v4.Job;
import com.google.cloud.talent.v4.JobServiceClient;
import com.google.cloud.talent.v4.RequestMetadata;
import com.google.cloud.talent.v4.SearchJobsRequest;
import com.google.cloud.talent.v4.SearchJobsResponse;
import com.google.cloud.talent.v4.TenantName;
import java.io.IOException;

public class CustomRankingSearchJobs {

  public static void searchCustomRankingJobs() throws IOException {
    // TODO(developer): Replace these variables before running the sample.
    String projectId = "your-project-id";
    String tenantId = "your-tenant-id";
    searchCustomRankingJobs(projectId, tenantId);
  }

  // Search Jobs using custom rankings.
  public static void searchCustomRankingJobs(String projectId, String tenantId) throws IOException {
    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the "close" method on the client to safely clean up any remaining background resources.
    try (JobServiceClient jobServiceClient = JobServiceClient.create()) {
      TenantName parent = TenantName.of(projectId, tenantId);
      String domain = "www.example.com";
      String sessionId = "Hashed session identifier";
      String userId = "Hashed user identifier";
      RequestMetadata requestMetadata =
          RequestMetadata.newBuilder()
              .setDomain(domain)
              .setSessionId(sessionId)
              .setUserId(userId)
              .build();
      SearchJobsRequest.CustomRankingInfo.ImportanceLevel importanceLevel =
          SearchJobsRequest.CustomRankingInfo.ImportanceLevel.EXTREME;
      String rankingExpression = "(someFieldLong + 25) * 0.25";
      SearchJobsRequest.CustomRankingInfo customRankingInfo =
          SearchJobsRequest.CustomRankingInfo.newBuilder()
              .setImportanceLevel(importanceLevel)
              .setRankingExpression(rankingExpression)
              .build();
      String orderBy = "custom_ranking desc";
      SearchJobsRequest request =
          SearchJobsRequest.newBuilder()
              .setParent(parent.toString())
              .setRequestMetadata(requestMetadata)
              .setCustomRankingInfo(customRankingInfo)
              .setOrderBy(orderBy)
              .build();
      for (SearchJobsResponse.MatchingJob responseItem :
          jobServiceClient.searchJobs(request).getMatchingJobsList()) {
        System.out.format("Job summary: %s%n", responseItem.getJobSummary());
        System.out.format("Job title snippet: %s%n", responseItem.getJobTitleSnippet());
        Job job = responseItem.getJob();
        System.out.format("Job name: %s%n", job.getName());
        System.out.format("Job title: %s%n", job.getTitle());
      }
    }
  }
}

Node.js

To learn how to install and use the client library for CTS, see CTS client libraries. For more information, see the CTS Node.js API reference documentation.

To authenticate to CTS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

const talent = require('@google-cloud/talent').v4;

/**
 * Search Jobs using custom rankings
 *
 * @param projectId {string} Your Google Cloud Project ID
 * @param tenantId {string} Identifier of the Tenantd
 */
function sampleSearchJobs(projectId, tenantId) {
  const client = new talent.JobServiceClient();
  // Iterate over all elements.
  // const projectId = 'Your Google Cloud Project ID';
  // const tenantId = 'Your Tenant ID (using tenancy is optional)';
  const formattedParent = client.tenantPath(projectId, tenantId);
  const domain = 'www.example.com';
  const sessionId = 'Hashed session identifier';
  const userId = 'Hashed user identifier';
  const requestMetadata = {
    domain: domain,
    sessionId: sessionId,
    userId: userId,
  };
  const importanceLevel = 'EXTREME';
  const rankingExpression = '(someFieldLong + 25) * 0.25';
  const customRankingInfo = {
    importanceLevel: importanceLevel,
    rankingExpression: rankingExpression,
  };
  const orderBy = 'custom_ranking desc';
  const request = {
    parent: formattedParent,
    requestMetadata: requestMetadata,
    customRankingInfo: customRankingInfo,
    orderBy: orderBy,
  };

  client
    .searchJobs(request)
    .then(responses => {
      for (const resources of responses) {
        for (const resource of resources.matchingJobs) {
          console.log(`Job summary: ${resource.jobSummary}`);
          console.log(`Job title snippet: ${resource.jobTitleSnippet}`);
          const job = resource.job;
          console.log(`Job name: ${job.name}`);
          console.log(`Job title: ${job.title}`);
        }
      }
    })
    .catch(err => {
      console.error(err);
    });
}

Python

To learn how to install and use the client library for CTS, see CTS client libraries. For more information, see the CTS Python API reference documentation.

To authenticate to CTS, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

from google.cloud import talent


def search_jobs(project_id, tenant_id):
    """Search Jobs using custom rankings"""

    client = talent.JobServiceClient()

    # project_id = 'Your Google Cloud Project ID'
    # tenant_id = 'Your Tenant ID (using tenancy is optional)'

    if isinstance(project_id, bytes):
        project_id = project_id.decode("utf-8")
    if isinstance(tenant_id, bytes):
        tenant_id = tenant_id.decode("utf-8")
    parent = f"projects/{project_id}/tenants/{tenant_id}"
    domain = "www.example.com"
    session_id = "Hashed session identifier"
    user_id = "Hashed user identifier"
    request_metadata = talent.RequestMetadata(
        domain=domain, session_id=session_id, user_id=user_id
    )
    importance_level = (
        talent.SearchJobsRequest.CustomRankingInfo.ImportanceLevel.EXTREME
    )
    ranking_expression = "(someFieldLong + 25) * 0.25"
    custom_ranking_info = {
        "importance_level": importance_level,
        "ranking_expression": ranking_expression,
    }
    order_by = "custom_ranking desc"

    # Iterate over all results
    results = []
    request = talent.SearchJobsRequest(
        parent=parent,
        request_metadata=request_metadata,
        custom_ranking_info=custom_ranking_info,
        order_by=order_by,
    )
    for response_item in client.search_jobs(request=request).matching_jobs:
        print(f"Job summary: {response_item.job_summary}")
        print(f"Job title snippet: {response_item.job_title_snippet}")
        job = response_item.job
        results.append(job.name)
        print(f"Job name: {job.name}")
        print(f"Job title: {job.title}")
    return results