Senior Data Scientist

MacPaw is a software company, that develops and distributes software for macOS and iOS. Today, our products have more than 30 million users worldwide.

At MacPaw, we believe humans and technology can reach their greatest potential together.

MacPaw is proud to be Ukrainian. The support and development of Ukraine are significant parts of the company’s culture. MacPaw gathers open-minded people who support each other and aspire to change the world around us.

We are looking for a Senior Data Scientist to join our cybersecurity division, Moonlock.

At MacPaw, we never stop at what has been accomplished and always look for new ways to improve the world. That is why we are going to launch a revolutionary new product in the personal cybersecurity sphere.

Joining the team, you will have a significant impact on the technology and scope of the project that could become the next big product for MacPaw.

Since the new product is at an early stage, you will have a lot of space for experiments and new ideas. This is an opportunity to work in a challenging, fast-paced environment and be free using various techniques you need. If it sounds interesting to you, look no further — this is the right job for you.

In this role, you will:

• Develop and improve LLM agents to solve customer problems better
• Utilize LangGraph to construct a robust multi-agent architecture
• Develop a graph-based knowledge base to ensure top-quality data delivery to end users
• Constantly improve all the stages of the pipelines to solve customer problems better
• Closely collaborate with the rest of the product team and other company’s internal departments

Skills you’ll need to bring:

• Profound experience as a Data Scientist
• ​​Thorough understanding of text processing and feature extraction, text embedding, text classification, sequence-to-sequence models
• Software development experience with Python and experience working with NLP and ML packages and frameworks such as spaCy, NLTK, PyTorch, SciPy, etc.
• Experience building LLM agents (RAG pipeline, ReAct approach, Plan&Execute, MultiAgent communication, Knowledge graph)
• Experience with LLM agent frameworks and packages LangChain, LangGraph, LangFuse, Vector DB
• Experience leading the technical execution of a project’s features
• Extensive SQL knowledge
• Practical understanding of the mathematics behind modern machine learning, linear algebra, and statistics
• At least an Intermediate level of English

As a Plus:

• Experience in cyber security
• Experience in running and tuning open-source LLMs
• Experience with conversational AI
• Experience with iOS/macOS ML frameworks
• Experience in edge deployment of ML models
• Experience with LangFuse or alternatives
• Experience designing a data science roadmap

What we offer:

• We are a Ukrainian company, and we stand with Ukraine against russian aggression
  We maintain workplaces and salaries for the mobilized Macpawians and provide financial support to colleagues or their families affected by the war. Here you also can read about MacPaw Foundation, which intends to help save the lives of Ukrainian defenders and provide relief to as many civilians as possible.
• We are committed to our veterans
  Our Veteran Career and Empowerment Program is designed to ensure our veterans and active military personnel receive the recognition, support, and opportunities they deserve.
• Hybrid work model
  Whether to work remotely or at the hub is entirely up to you. If you decide to mix it, our Kyiv office, which works as a coworking space, is open around the clock. The office is supplied with UPS and Starlink for an uninterrupted work process. We also rent space in the Promprylad Coworking in Ivano-Frankivsk and reimburse the costs of renting a coworking space in any other city. If you decide to work at home, we cover the costs spent on your workspace organization: portable power stations, power banks, etc.
• Your health always comes first
  We guarantee life insurance starting on your first working day. Besides, we cover 100% of your medical insurance costs and 50% for your dependents. We also cover dental and massages and offer a 50% refund for psychotherapy.
• Flexible working hours
  You can choose a schedule that is comfortable for you. No one here tracks your clock in/clock out because MacPaw is built on trust and cooperation.
  Space to grow both professionally and personally
  Whatever your dreams and aspirations are, we got you. Education budget, annual development reviews, free English classes, and regular lectures. We also offer personal coaching with organizational coaches.
• Teams we are proud of
  We build honest, transparent, and reliable relationships within teams. Every Macpawian can improve processes and implement their ideas. We encourage open and constructive feedback and provide training for Macpawians on giving and receiving feedback.
• Office designed for people (and pets)
  Our office has it all. A spacious workplace with enough room for sitting up, lying down, and running around. A gym for recreation, fitness, and yoga. Cozy kitchens with coffee, snacks, and lunches. Sleeping/meditation rooms. A terrace with a view where we throw summer parties. Also, we have two cats living in the office, and you are welcome to bring your pets to the office (we have separate floors for cats and dogs).
• Time-off policy that covers life’s needs
  20 vacation days, unlimited paid sick leaves, xDays (2 days a month to work on side projects), days for personal time-off designed to help you take care of essential matters in your personal life, and parental leaves. On top of all that, sabbaticals are open after 5 years of being with MacPaw.
• Join social initiatives with MacPawCares
  MacPaw participates in numerous humanitarian aid and charity projects across many fields, and you are welcome to jump in and spend up to 24 working days per year making the world a better place.
• We’re an equal-opportunity employer. Here is a safe place for applicants of all backgrounds
  We are hiring talented humans. Meaning with all our variety of backgrounds and identities, including service members and veterans, women, members of the LGBTQIA+ community, individuals with disabilities, and other often underrepresented groups. MacPaw does not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.