Senior ML Engineer - Search & LLM Ops

RavenPack; Warszawa; On-site; PLN 387,000 - 559,000; Full time

Benefits offered by this job

Growth opportunity

Competitive salary

Continuous learning

Innovation culture

Diversity in international environment

Job summary

RavenPack in Marbella is seeking a Senior Machine Learning Engineer to join the Search & Recommendation team. You will own the full ML lifecycle from ideation to deployment, building ranking and retrieval models that personalize content for finance professionals.

Strong background in NLP, information retrieval, and recommender systems is required, with excellent English communication. European legal working status is required. This position is based at our sunny Marbella headquarters.

Qualifications

• Master’s or PhD in Computer Science, Machine Learning, Data Science, or related field.
• 3+ years of hands-on ML model development and deployment experience.
• Strong Python programming skills and familiarity with SQL.
• Deep knowledge of ML frameworks (PyTorch/TensorFlow) and libraries (Scikit-learn, Hugging Face).
• Hands-on experience with vector databases.
• Excellent analytical and quantitative reasoning skills.
• Fluent in English, with strong written and verbal communication.

Responsibilities

• Own the end-to-end design, development, and deployment of advanced ranking and retrieval models.
• Fine-tune and distill language models for domain-specific tasks.
• Build scalable recommender systems to personalize user content.
• Collaborate with product managers, software engineers, and data scientists to translate needs into solutions.
• Research emerging ML/NLP/IR trends and prototype new ideas to maintain competitive edge.

Skills

ML model deployment

Python programming

PyTorch / TensorFlow

Vector databases

Quantitative reasoning

English communication

Education

Master’s or PhD in CS/ML/DS

Tools

Scikit-learn

Hugging Face

SQL

PyTorch

TensorFlow

Job description

At RavenPack, we are at the forefront of developing the next generation of generative AI tools for the finance industry and beyond. With 20 years of experience as a leading big data analytics provider for financial services, we empower our clients—including some of the world's most successful hedge funds, banks, and asset managers—to enhance returns, reduce risk, and increase efficiency by integrating public information into their models and workflows. Building on this expertise, we are launching a new suite of GenAI and SaaS services, designed specifically for financial professionals.

Join a Company that is Powering the Future of Finance with AI

RavenPack has been recognized as the Best Alternative Data Provider by WatersTechnology and has been included in this year’s Top 100 Next Unicorns by Viva Technology. RavenPack has launched Bigdata, our Gen-AI platform tailored for finance, which is already being recognized as the #1 platform for powering financial AI agents.

European legal working status is required.

Join RavenPack

RavenPack is looking for an experienced Senior Machine Learning Engineer to join our Search & Recommendation team at our sunny headquarters in Marbella.

Your mission will be to architect and build the next generation of our search and recommendation intelligence. You will take ownership of the full machine learning lifecycle, from ideation and data exploration to model deployment. By creating sophisticated, scalable, and personalized content delivery systems, you will directly shape how top financial professionals worldwide discover and interact with the critical information that drives their decisions. This is a unique opportunity to solve complex challenges at the intersection of information retrieval, NLP and finance.

The ability to communicate effectively in English both in writing and verbally is a must. European legal working status is required.

What You'll Be Doing

As a key member of the team, you will have the autonomy to innovate and the responsibility to deliver robust, high-impact solutions.

Own Model Development: Lead the end-to-end design, development, and deployment of advanced ranking algorithms and retrieval models to deliver highly relevant search results and content.

Innovate in Semantic Search: Fine-tune and distill Language Models to enhance their domain-specific expertise. You'll implement cutting-edge semantic embedding techniques (e.g., binary, matryoshka, late interaction models) to optimize for speed and accuracy.

Build & Scale Recommender Systems: Architect and implement sophisticated recommender systems that personalize the user experience, driving engagement and content discovery.

Collaborate & Mentor: Work closely with product managers, software engineers, and data scientists to translate business needs into technical solutions.

Stay Ahead of the Curve: Actively research and evaluate emerging trends and academic research in ML, NLP, and Information Retrieval, prototyping new ideas to maintain our competitive edge.

What We're Looking For

We are seeking a seasoned expert with a passion for building intelligent systems and solving complex problems.

• A Master’s or PhD in Computer Science, Machine Learning, Data Science, or a related quantitative field.
• 3+ years of hands‑on professional experience in building and deploying machine learning models in a production environment, with a significant focus on Information Retrieval, Search, or Recommender Systems.
• Strong programming skills in Python and familiarity with SQL or other query languages.
• Deep knowledge of ML frameworks like PyTorch or TensorFlow, and libraries like Scikit‑learn and Hugging Face.
• Hands‑on experience with vector databases.
• Analytical Mindset: Exceptional quantitative and problem‑solving skills, with a proven ability to apply rigorous statistical and mathematical reasoning to complex, real‑world challenges.
• Excellent verbal and written communication skills in English. You are a clear and precise communicator who excels in a collaborative, agile team environment.

Bonus Points:

• Experience in the financial domain.
• Experience with MLOps tools and cloud platforms.

What's in it for You?

• Growth Opportunity: Join a rapidly growing company with 180+ team members with offices in New York, Madrid, and Marbella, building AI that truly matters for business and finance.
• Competitive Salary: In RavenPack, we believe that your time and experience needs to be fairly rewarded.
• Continuous learning: We provide the support needed to grow within the team.
• Innovation: Innovation is the key to our success, so we encourage you to speak up and tell us about our vision.
• Diversity is in our DNA! You will work in an international environment (over 29 nationalities and 24 languages spoken!)

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.