How I Built a Tool to Filter 700 Job Listings, Landed Head of AI Role

A job seeker in Spain has demonstrated the power of building your own tools by creating an AI-powered job filtering application that processed 700 listings and helped him land a Head of AI position — and the tool is now open source.

Faced with an overwhelming number of AI-related job postings, the developer built a system that could automatically evaluate listings against his specific criteria: role responsibilities, required experience level, company stage, technology stack, and compensation range. The tool used natural language processing to parse job descriptions and rank them by relevance, cutting weeks of manual review down to hours.

What makes the story compelling is not just the technical achievement but the mindset it represents. Rather than passively scrolling through job boards and applying indiscriminately, this developer used his core skills to create a competitive advantage. The tool essentially allowed him to identify the best opportunities before other candidates even found them.

The open-source release means other job seekers can adapt the system to their own search parameters. The code is designed to be modular, allowing users to customize the evaluation criteria, data sources, and output formats to match their specific needs and industries.

The approach also generated something unexpected: proof of capability. When the developer discussed the tool during interviews, it served as a live demonstration of the exact skills — AI engineering, product thinking, and practical problem-solving — that the hiring company was looking for. The tool became both the method and the message.

What This Means For You: In a competitive job market, the candidates who stand out are the ones who create rather than just apply. If you have technical skills, consider building something that solves your own job search problem — it might be the most impressive item on your resume. And if you are hiring, look for candidates who demonstrate initiative through projects, not just credentials.