Senior Machine Learning Engineer – Search Quality

🕒 July 28

🇪🇺 Europe – Remote

💵 $80k - $120k / year

⏰ Full Time

🟠 Senior

🤖 Machine Learning Engineer

👻 Ghost score 6%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Constructor

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2015

☁️ SaaS

🤖 Artificial Intelligence

🛍️ eCommerce

💰 $25M Series B - Constructor on 2024-06

SaaS • Artificial Intelligence • eCommerce

Constructor is an AI-native, API-first platform that provides product search and discovery solutions optimized for e-commerce. The company offers a commerce reasoning engine and a suite of features — search, autosuggest, personalized recommendations, AI shopping agents, attribute enrichment, retail media, and cross-channel discovery — to help retailers and enterprises deliver personalized discovery experiences across onsite and offsite touchpoints. Constructor positions itself as a specialist in product discovery for both B2C and B2B retail, integrating with existing tech stacks and emphasizing transparent, explainable AI for merchandising and conversion optimization.

📋 Description

• Improve the e-commerce experience for users by building systems that power relevance for global retailers. • Focus on relevance evaluation and quality improvements. • LLM-based evaluation, teaching the model to understand query intent, and represent items from messy catalog data. • Reranking, filtering, signal computation for real-time quality in production. • Automated quality monitoring and agentic insights to detect degradations and find underperforming patterns.

🎯 Requirements

• 4+ years shipping production ML systems • Experience with search, information retrieval, or recommendation systems • Hands-on experience with fine-tuning, evaluation frameworks, and scaling LLM deployments • Strong Python and PyTorch. Fluency in SQL and data orchestration tools (Spark, Airflow) • Experience designing and running A/B tests to validate model impact • Excellent English communication skills • Experience collaborating in cross-functional teams (ranking, product, data engineering)

🏖️ Benefits

• 🧠 Work with smart and empathetic people who will help you grow and make a meaningful impact. • 🎉 Regular team offsite events to connect and collaborate. • 🌎 Fully remote team - choose where you live. • 🏝️ Unlimited vacation time - we strongly encourage all of our employees take at least 3 weeks per year. • 🛋️ Work from home stipend! We want you to have the resources you need to set up your home office. • 💻 Apple laptops provided for new employees. • 🧑‍🎓 Training and development budget for every employee, refreshed each year. • 👪 Maternity & Paternity leave for qualified employees. • 💵 Base salary: $80k–$120K USD, depending on knowledge, skills, experience, and interview results • 📈 Stock options - offered in addition to the base salary