Senior Data Scientist (Availability)

Emerging Travel Group; Portugal; Híbrido; EUR 55 000 - 75 000; Tempo integral

Vantagens oferecidas por esta oferta de emprego

Flexible schedule

Remote or hybrid work

Language learning support

Travel discounts for employees

MyTime Day Off

Resumo da oferta

Emerging Travel Group is seeking a data scientist/ML engineer to own end-to-end ML projects, from hypothesis to measurable business impact. You will collaborate with Data Engineers to build robust data pipelines and with Analysts to define metrics and run A/B tests.

You will tackle core tasks like rate matching, recsys, and multi-objective optimization to improve B2B experiences. The role emphasizes production-quality Python, testing, Airflow, and bringing models to production, with flexible

Qualificações

• At least 4+ years as Data Scientist or ML Engineer with hands-on experience.
• Ability to translate business goals into ML tasks and deliver impact.
• Strong ML stack knowledge: Gradient Boosting, CatBoost/LightGBM, classification and regression.
• Proven experience with entity matching, RecSys and ranking techniques.
• Massive data handling: SQL proficiency and PySpark pipelines.
• Production-ready Python code with tests; experience with Airflow and microservices.

Responsabilidades

• End-to-End ML Ownership from hypothesis to measurable impact.
• Collaborate with Data Engineers and Data Analysts to build pipelines and tests.
• Translate business goals into mathematical models and optimization tasks.
• Develop, train, and validate models to improve B2B user experience.

Conhecimentos

4+ years experience

Business mindset

Classic ML algorithms

Matching & RecSys

SQL

PySpark

Production Python

Airflow

KNN / FAISS

Testing & CI

Ferramentas

FAISS

KNN

Learning-to-Rank

Airflow

Python

Descrição da oferta de emprego

• End-to-End ML Ownership: Lead ML projects from formulating hypotheses and task setting to delivering measurable business impact. You will be responsible for the entire cycle, ensuring fast time-to-market and maintaining model quality in production.
• Cross-functional Collaboration: Work closely with Data Engineers to build robust production data pipelines, and with Data Analysts to dive into business context, define metrics, and design/evaluate A/B tests.
• Domain-Specific Problem Solving: Translate business goals into mathematical models. You will solve core domain challenges, such as: Rate Matching (deduplication of rates from 350+ suppliers), Alternative Search (RecSys & Ranking for unavailable rates), Multi-objective Optimization (balancing margin maximization with incident minimization), and Cache Freshness Prediction (predicting the likelihood of a rate changing before booking).
• Model Development: Develop, train, and validate machine learning models to test product hypotheses and proactively improve the B2B user experience.

Requirements

Must Have:

• Experience: At least 4+ years of hands-on experience as a Data Scientist or ML Engineer.
• Business Mindset: Ability to dig into data, identify root business problems, and translate business objectives into clear ML tasks rather than just tuning metrics in a vacuum.
• ML Stack & Algorithms: Solid knowledge of classic Machine Learning (Gradient Boosting like CatBoost/LightGBM, Classification, Regression).
• Matching, RecSys & Ranking: Proven experience with entity matching tasks, and a deep understanding of Recommendation Systems and Ranking approaches (KNN, FAISS, Learning-to-Rank, pointwise / pairwise / listwise approaches).
• Big Data Stack: Confident experience working with massive datasets (we process terabytes daily). Excellent SQL skills and practical experience building pipelines with PySpark.
• Engineering Independence: Production-quality Python code, ability to write tests, and readiness to bring models to production (experience with Airflow and Python microservices).

Nice to Have:

• Industry Experience: Experience in TravelTech, E-commerce, or B2B APIs (understanding of hotels, rates, distributors).
• NLP & Embeddings: Basic NLP skills, understanding the principles of text embeddings and how to train them (highly useful for matching textual rate descriptions, room types, and cancellation policies).
• Optimization & Pricing: Experience with dynamic pricing, multi-objective optimization, or Next Best Action (NBA) systems.
• Math & Stats: A solid foundation in probability theory and mathematical statistics for rigorous experiment design and model evaluation.

Benefits

• A fully flexible work schedule — there’s no pressure to start work at exactly 9:00 AM; what matters is achieving results and moving forward;
• Each person in our team is encouraged to choose their preferred work format. You can work fully remotely, come to the office, or choose a hybrid work model;
• We are an ambitious and supportive team who love what they do, appreciate each other, and grow together;
• The growth and development of each employee is our priority, so we have internal programs available for adaptation and training, development of soft skills and leadership abilities that are tailored individually to each employee;
• We also provide partial compensation for employees participating in external training and conferences;
• In tourism, it's difficult to grow without an excellent knowledge of English, and we support our employees' language learning goals — we organize group and individual lessons, plus speaking clubs with colleagues from all over the world;
• And, of course, to encourage you to travel more, we offer corporate prices on hotels and other travel services;
• We prioritize well-being and are committed to supporting the overall health and work-life balance at ETG. As part of this commitment, we provide MyTime Day Off - an extra day off that is designed to give our employees the flexibility to focus on important matters, whether it’s taking care of their health, mental recharge, addressing personal issues, or any other important activities.

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