Job Description Optimizer by Jooble: Write Ads with Real Market Data

Writing a job ad sounds simple until you try to make it work. Recruiters spend hours adjusting wording, titles, and structure, hoping their ad will stand out. Yet most still rely on templates or intuition rather than hard data.

At Jooble, we wanted to change that. With millions of job postings flowing through our platform across 66 countries and 140,000 sources, we see what truly drives candidate engagement.

That’s how the Job Description Optimizer was born, a free tool built on job ad performance data, designed to help you write ads that actually attract candidates.

The Challenge: Why Most Job Ads Underperform

Even well-written ads can fail to deliver applications. Here’s why:

• Titles mismatch job seekers’ searches. A 2024 analysis by LinkedIn Talent Solutions found that ads with ambiguous or jargon-heavy titles get up to 40% fewer clicks.
  
• Descriptions are too long or poorly structured. The optimal job description length is between 300–700 words, with enough detail, but still scannable.
  
• Lack of transparency. Job ads including salary ranges attract nearly twice as many applicants.

These factors combine to create what we call the visibility gap, when your job post looks fine on screen but fails to connect with the right audience.

What We Did at Jooble

Our team decided to take the guesswork out of writing. The Job Description Optimizer uses Jooble’s own dataset of job postings and candidate behavior to identify what makes certain ads perform better.

Instead of relying on generic language models, we built the tool on top of:

• Internal research from Jooble’s team (title performance, description structure, click-through optimization).
• Insights from external studies on job ad readability and recruitment language.
• Continuous feedback from thousands of employer accounts across Europe and beyond.

How the Job Description Optimizer Works

Two Simple Ways to Start

1. Generate from scratch. Enter the job title, company details, and a few key points, and the tool creates a structured job ad draft.
   
2. Optimize your existing ad. Paste your job post and receive an instant score with detailed recommendations.

What You’ll Get

• Quality score, an overall assessment of your ad’s clarity and appeal.
• Highlighted feedback on weak sections (titles, structure, tone).
• Suggested improvements generated from Jooble’s data models.
• Top-performing job titles specific to your role or industry.
• Copy-ready version that can be directly published on Jooble or partner boards.

Main Features and Benefits

Feature	Why It Matters
Real-data scoring	Benchmark your ad against high-performing posts in similar roles
Top-performing titles	Shows empirically proven titles that attract the most clicks.
Smart structure checks	Ensures your ad includes the key sections candidates expect.
Multilingual support	Currently available in English, German, and French.
Free access	No paywalls, no trial, immediate value for all employers.

Read also: How to reduce AI bias in recruitment: 3 methods

What Makes It Unique: The Data Advantage

Most “AI writing tools” generate text. The Job Description Optimizer learns from actual hiring outcomes.

Jooble’s dataset allows the tool to recognize the patterns behind successful ads:

• Optimal title length: 35–65 characters drives up to +27% higher CTR
• Readable tone: Ads written at a “high-school readability level” receive 12% more completed applications.
• Structured clarity: Listings with clearly separated sections (“About the Role”, “Requirements”, “Offer”) have higher candidate dwell time.

All of this is embedded directly into the Job Description Optimizer’s algorithm, meaning measurable performance data backs every suggestion.

Benefits for Recruiters and Employers

1. Save time. No more blank-page syndrome, start fast and finish faster.
2. Improve ad performance. Use real data insights to increase click-through and application rates.
3. Maintain consistency. Perfect for agencies managing multiple client ads.
4. Stay multilingual. Create and optimize ads in several languages.
5. Scale your hiring. Optimize dozens of listings in minutes, not hours.

Key Insights the Optimizer Leverages

Insight	Impact
Job ads with salary ranges generate +90% more clicks	Transparency increases trust
Shorter ads (300–700 words) have higher conversion	Improves completion rates
Clear titles boost visibility by +27%	Better search matching
Data-driven writing cuts time-to-hire by up to 25%	Faster recruitment cycles

How to Get Started

1. Visit Job Description Optimizer.
   
2. Choose to Generate or Optimize your ad.

3. Review your score and improvement suggestions.

4. Copy your improved version or, soon, publish it directly to Jooble.

5. Track your performance and keep optimizing.

Read also: Recruiting Without Overspending: What Every Employer Needs to Know

The best job ads aren’t written by chance, they’re written with insight. With Jooble’s Job Description Optimizer, you can transform your hiring content into a measurable, data-driven asset.

It’s fast. It’s free. And it’s built on something, no AI chatbot can replicate real market data from millions of live job postings.

If you’re ready to go further, we’re here to help.

Jooble offers a range of hiring plans to quickly and efficiently bring you qualified candidates. Our team can guide you on job-ad optimization, promotional strategy, and the right mix of solutions to support your growth.

Start with better job ads, continue with better hiring?

📩 Reach out to us: salesteam@jooble.com
👉 Or start posting your open roles right here

Give us a try today and let Jooble’s team help you find, attract, and hire exceptional people faster.