Senior Lucene Developer

Would you like to shape the future technology used by eCommerce businesses and consumers across Europe? Do you have experience with B2B SaaS product management and know what it takes to create valuable products for customers that drive business results?

Then you might be the person we are looking for!

FactFinder is the European leader in product discovery and search. Hundreds of eCommerce stores use our AI-powered technology to help create a great purchasing experience and improve their revenue.

We are looking for an experienced Lucene Developer to join our dynamic team and take ownership of search and indexing solutions within our product suite. Your primary focus will be designing and implementing scalable, high-performance search services using Apache Lucene, as well as contributing to a completely new product. You will collaborate with cross-functional teams, including other developers and product managers, to build high-quality, future-proof solutions.

Your mission

• Design, implement, and optimize efficient Lucene-based search and indexing solutions
• Maintain, test, and debug search-related components
• Identify areas for improvement in existing search functionality and develop enhancements
• Architect Lucene for optimal performance and scalability
• Work closely with other developers and product managers to refine capabilities
• Mentor less experienced developers and contribute to team growth
• Create technical concepts, components, and services

Your profile

• At least 5 years of experience in commercial and object-oriented development
• Strong expertise in Apache Lucene and search-related technologies (e.g., Solr, Elasticsearch)
• Experience with Java (and knowledge of Python or .NET is a plus)
• The ability to communicate complex search concepts to non-technical stakeholders
• Strong communication skills—both written and verbal
• Hands-on experience with cloud-based search infrastructure and service-oriented architectures

THE JOY OF WORKING WITH US

• Scale-up company with a market-leading product
• Open culture with diverse international teams
• Personal development support, e.g. access to the learning platform Udemy
• Regular feedback rounds

About us

FactFinder empowers eCommerce businesses to achieve more – driving higher conversion rates and customer loyalty through AI-powered product discovery and search. Trusted by more than 2,000 B2B and B2C online shops worldwide, we help millions of shoppers quickly find the most relevant products every day.

Backed by a committed and responsive local team, FactFinder delivers flexible, customized solutions to tackle today’s challenges and prepare for tomorrow’s growth. With offices across Europe, we are dedicated to your success. Learn more at

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