Team:** Engineering
Location: Remote - EMEA
Employment type: FullTime
ABOUT US
Launched in 2019, Constructor is an AI-first ecommerce search and discovery platform that helps shoppers find the right products at the right time and enables leading global e-commerce brands to drive meaningful revenue and conversion gains.
As a member of the ML Recall team, you will improve the e-commerce experience for hundreds of millions of users across the world by building the retrieval layer of our search engine.
The mission is to make sure the product a shopper looks for is always among the results - for any query, in any language, in a few milliseconds.
ABOUT THE JOB
Your primary focus will be search retrieval and visual solutions:
- Search Recall. A modern retrieval stack with dense and sparse models, plus query understanding. Latency is a strict requirement, so quality vs speed tradeoff is constant.
- Visual and multimodal search. End-to-end visual solutions: image search, shop the look, visual recommendations.
- Models as a platform. Our team owns a wide range of deep learning models, and other teams build on top of them.
WHAT MAKES THIS INTERESTING
- Multi-domain, multi-language, at scale - 40+ languages, 20+ domains. The models need to generalize across all of them - without per-customer rules or overrides.
- Real room for R&D. You will experiment with new architectures and approaches, A/B test them on live traffic, and deliver measurable business value.
- The measurement challenge. You can't measure what was not returned - a missed product leaves no trace in the logs, and the query looks like it worked. Building the ground truth to catch that is part of the modeling work.
REQUIREMENTS
- 4+ years shipping production ML systems
- Experience with search, information retrieval, or recommendation systems
- Hands-on experience training, fine-tuning, and evaluating transformer models
- Strong Python and PyTorch. Fluency in data orchestration tools (Spark, Airflow)
- Experience owning a model end to end - from problem framing to rollout
- Experience designing and running A/B tests to validate model impact
- Excellent English communication skills
BENEFITS
- 🏝️ Unlimited vacation time - we strongly encourage all of our employees take at least 3 weeks per year
- 🌎 Fully remote team - choose where you live
- 🛋️ 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
- 🧠 Work with smart people who will help you grow and make a meaningful impact
- 💵 Base salary: $80k–$120k USD, depending on knowledge, skills, experience, and interview results
- 📈 Stock options - offered in addition to the base salary
- 🎉 Regular team offsites to connect and collaborate
