Elasticsearch Engineer

Role: Search Engine Consultant / ElasticSearch

Contract type: Freelance / Contract

Duration: 12 months initially (high likelihood of extension)

Location: Lille, France

Work model: Hybrid – 1 day per week onsite

We are looking for an experienced Search Engine Developer to join a team working on the optimisation and continuous improvement of the search engine powering a large-scale international e-commerce platform.

You will join a team composed of developers and a Product Owner, contributing to the performance, scalability, and relevance of the search experience used across multiple digital platforms in Europe.

Responsibilities

• Contribute to the continuous improvement of the search engine used on a high-traffic e-commerce platform.
• Design, develop, and optimise ElasticSearch-based solutions in a complex and performance-driven environment.
• Improve the performance and relevance of search results.
• Develop and maintain backend services using Node.js / NestJS with TypeScript.
• Analyse and leverage data to enhance search performance and user experience.
• Collaborate with product and engineering teams in an Agile environment.
• Contribute to DevOps and CI/CD practices to ensure reliable and high-quality deployments.

Required Experience & Skills

• 5–10 years of experience in backend development or software engineering.
• Strong experience with Node.js and TypeScript.
• Deep expertise in ElasticSearch in complex, high-traffic environments.
• Experience working in e-commerce or large-scale digital platforms is highly desirable.
• Strong understanding of software craftsmanship and engineering best practices.
• Experience with cloud and data environments (GCP, BigQuery, or similar).
• Solid skills in data analysis and SQL querying.
• Experience with CI/CD pipelines and DevOps practices.
• Experience working in Agile environments.
• Good professional level of English required.

Soft Skills

• Strong teamwork and collaboration skills.
• Analytical mindset and ability to solve complex technical problems.
• Ability to work effectively in a fast-paced and evolving technical environment.