Senior Search and Recommendations Engineer, Store
Apify Technologies s.r.o.9 hours ago
Prague, CzechiaSenior
Responsibilities
- Own Store search relevance across retrieval, ranking, query understanding, filtering, and sorting.
- Configure and tune Recombee recommendation scenarios, business rules, and signals, including cold-start and sparse-data cases.
- Improve LLM-based evaluations, relevance metrics, and A/B testing to detect regressions and guide product decisions.
- Maintain and evolve discovery signals, ranking, categorization, taxonomies, and classification for a growing Actor catalog.
- Build retrieval and query-understanding capabilities that help AI agents find the right Actor on their first call.
- Ship and debug changes across the Store frontend, scoring and ranking services, Recombee, and supporting data pipelines.
- Set technical direction for search and recommendations and become the team’s subject-matter expert.
- Deliver measurable improvements to discovery metrics such as search success, first Actor run, activation, and first-week retention.
Requirements
- 4+ years of software engineering experience, including 2+ years owning search or recommendation relevance in production at a marketplace, e-commerce, or content platform.
- Hands-on experience with search relevance, ranking functions, query understanding, filtering, and sorting.
- Experience configuring and tuning recommendation systems, including cold-start and sparse-data problems.
- Experience evolving category taxonomies and classification systems for large, growing catalogs using rules, models, or LLMs.
- Experience measuring relevance with appropriate metrics and evaluations and using A/B tests to influence product decisions.
- Strong backend skills for production services and data pipelines in TypeScript/Node.js.
- Ability to assess existing search, ranking, and recommendation systems, prioritize risks, and make sound technical judgments.
- Preferred experience with embeddings, hybrid lexical and vector retrieval, and LLMs for retrieval, reranking, query rewriting, or evaluation.
- Preferred ability to use React and TypeScript to ship Store search and listing-page changes.
- Ability to explain ranking trade-offs to product, design, and data colleagues and translate discovery goals into measurable outcomes.
Benefits
- Full-time position in Prague with access to the 100Yards office and an option to work remotely.
- Flexible working hours and flexible holiday practices.
- Stock options and profit sharing.
- Unlimited Claude access, free Apify credits for friends and family, and a generous hardware budget.
- Free Multisport card, office massages, free lunches, snacks, coffee, beer, and other office amenities.
- Education and training budget, conference tickets, internal learning sessions, and opportunities to work across teams.
- Epic team buildings and offsites, plus a pet-, kid-, and bike-friendly office.
- Regular team activities and free Prague Zoo entry.
Tech Stack
Amazon DynamoDBAWSCypressGitHub ActionsGrafanaHelmKubernetesMongoDBNestJSNext.jsNode.jsPrometheusReactRedisTerraformTypeScript
Categories
About Apify Technologies s.r.o.
Apify Technologies s.r.o. builds a platform for web scraping, browser automation, and AI‑agent tooling, plus a marketplace of serverless “Actors” used by developers and data teams. It offers APIs, no‑code tools, and integrations with n8n, Make, Zapier, and LangChain, with a SaaS model and revenue sharing for creators. Founded in 2016 and headquartered in Prague, it hosts thousands of Actors on its store, and its creator community earns over $1.5 million monthly.