FYUL
FYUL
1,001 – 5,000 Employees
B2BeCommerceManufacturing
FYUL is the company created through the merger of Printful and Printify, combining on-demand manufacturing with the technology needed to build and manage merchandise businesses. Its platform supports independent creators and established brands as they design, produce, and sell custom products worldwide, while providing end-to-end fulfillment and merchandise solutions for eCommerce. Through a house of brands that includes Snow Commerce, FYUL also helps businesses develop and deliver branded merchandise experiences at scale.

Staff Data Scientist in Poland (Hybrid)

Lead search, recommendation, generative AI, and computer vision initiatives as a Staff Data Scientist. Build scalable ML systems supporting FYUL’s global on-demand commerce products.

Description

  • Shape the architecture for candidate retrieval, multi-objective ranking, and learning-to-rank models supporting product and design recommendations
  • Improve personalization through sequence embeddings that capture merchant history, niche trends, and sales performance
  • Link merchant sales and conversion outcomes to upstream design-generation and candidate-ranking systems
  • Lead image-generation pipelines using LLMs, multimodal models, diffusion models, UNets, and Vision Transformers
  • Build classical and deep-learning computer vision solutions for delayering, background removal, print-area analysis, and asset validation
  • Own product-engineering decisions across model selection, fine-tuning, prompt engineering, self-hosting, serving, and frontend workflows
  • Prototype, refine, and deliver end-to-end agentic pipelines and ML features with AI-assisted development tools
  • Establish online and offline evaluation methods using NDCG, MRR, visual-quality measures, and merchant conversion uplift
  • Manage the ongoing A/B testing strategy
  • Evaluate build-versus-buy options, API and self-hosted fine-tuning approaches, and inference optimization opportunities
  • Define organization-wide standards for applied machine learning
  • Mentor senior individual contributors and lead technical design reviews
  • Promote a delivery culture centered on measurable business outcomes

Requirements

  • At least eight years of hands-on experience building, deploying, and scaling production ML systems, including demonstrated staff-level technical leadership
  • Advanced knowledge of search, candidate-generation, and recommendation systems, including Two-Tower models, ANN vector indexes, Transformer rerankers, and learning-to-rank methods
  • Practical expertise with OpenCV and modern computer vision architectures such as CNNs, Vision Transformers, diffusion models, and multimodal LLMs/CLIP
  • Experience creating closed-loop ML systems that use clicks, conversions, and sales outcomes to improve upstream training and generation logic
  • Strong Python skills and fluency with modern AI/ML tooling, including PyTorch for deep learning and vision
  • Experience using LLM orchestration and agentic frameworks such as LangChain and LangGraph
  • Production experience with serving patterns including FastAPI and event-driven asynchronous processing
  • Experience with MLOps platforms such as CometML and Flyte
  • Experience working with cloud data warehouses such as Snowflake
  • Comfort using Gemini, Claude Code, and Claude Cowork in development workflows
  • Track record of owning end-to-end features and making architecture decisions across the full stack
  • Experience in e-commerce, two-sided marketplaces, or creator platforms is a plus
  • Submit a resume in English

Benefits

  • Join a global, inclusive team that combines ambition, support, and a strong focus on execution
  • Work remotely or from a modern, welcoming office in Riga
  • Use flexible hours, with starts as late as 11 AM
  • Receive private health insurance
  • Take two additional paid days for mental or physical well-being
  • Take one additional paid day to mark a birthday or another celebration
  • Access internal and external learning opportunities
  • Use mentorship, internal meetups, and hackathons both online and on site
  • Enjoy free, healthy lunch when working from the Riga office
  • Create and order personal merchandise through company platforms at an employee discount
  • Take part in memorable team-building activities and parties

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