2 days ago
Lisbon, PortugalSenior / Staff+
Responsibilities
- Improve core search algorithms, user-query understanding, and product-search relevance.
- Develop functionality that improves the marketplace user experience.
- Build AI/ML support for answering user questions using order, profile, transaction, and service-action context.
- Automate refunds.
- Perform raw-data analysis, formulate hypotheses, create models, run experiments, and deploy ML results into production.
- Develop and debug distributed, high-load applications and write testable code.
Requirements
- Strong knowledge of fundamental algorithms and data structures, including implementation in standard libraries.
- Proficiency in at least one programming language and experience developing and debugging distributed, high-load applications.
- Industry experience in machine learning, including modeling and training approaches such as linear models, GBDT, and DNNs.
- Knowledge of statistics and end-to-end machine-learning development.
- Preferred: experience with recommendation or search systems and training neural-network models.
- Preferred: experience with Spark, Cassandra, MongoDB, and Kafka.
- Preferred: knowledge of Go.
Benefits
- Office-first work arrangement with flexible hours and the possibility of working remotely 52 days per year.
- Health insurance including dental care for employees and their children, daily meal allowance, and 100% paid sick leave.
- Full relocation assistance for employees and their families.
- Licenses and access to a wide range of AI tools.
- Opportunities for promotion, professional training, and English and Portuguese courses.
- International collaboration across Portugal, Brazil, Latvia, and China, plus team-building activities and knowledge-sharing workshops.
Tech Stack
Apache AirflowApache CassandraApache KafkaApache SparkDockerGoJenkinsKubernetesMongoDBPythonPyTorchScala
Categories
About Joom
Joom Group builds e-commerce products for global trade, including Joom, a cross-border consumer marketplace; JoomPro, a B2B importing marketplace; JoomPulse, analytics for Mercado Livre sellers; and Onfy, a German pharmaceutical marketplace. Founded in 2016 in Riga and privately held, the company moved its headquarters to Lisbon in 2023 and operates across Europe, the Americas, and China. Revenue comes from marketplace commissions, services for sellers, and related transaction fees.