Senior Data/ML Engineer

Salary: 1080 - 1280 PLN/day on B2B

Work model: elastic hybrid from Gdynia / Gdańsk / Warszawa / Łódź (at least 2-3 days per week from the office)

Why choose this offer?

• You can expect a flexible work organization
• The international work environment will give you the opportunity to interact with the English language on a daily basis
• Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit)
• The Jit community will bring you a nice time during regular integration meetings

Project

We are looking for an experienced Machine Learning Engineer / Data Engineer to manage the full lifecycle of machine learning models—from development and deployment to monitoring and optimization—ensuring high performance and reliability. You will work with large-scale data (both batch and real-time) using Spark and Python, implement MLOps best practices, and deliver scalable machine learning solutions that drive business impact.

Responsibilities you'll have

• Manage the full lifecycle of ML models, including development, deployment, monitoring, and performance optimization
• Implement MLOps practices such as CI/CD, testing, monitoring, and automation of ML workflows
• Build and maintain distributed big data processing pipelines for both structured and unstructured data using Spark and Python
• Enrich and transform corporate data to enable analytics, visualization, and advanced machine learning models
• Collaborate with cross-functional teams, including data scientists, DevOps engineers, and IT, to deliver high-quality ML solutions
• Work closely with analysts and business stakeholders to develop predictive and analytics models
• Optimize current MLOps practices and libraries to apply them to a broader range of use cases
• Explore cloud-based AI/ML solutions to improve infrastructure and scalability

Expected competences and knowledge

• Minimum 5 years of experience with Python and Spark
• Hands-on experience with AWS services for ML and data processing covering data ingestion, model training, batch inference, and automation pipelines
• Strong understanding of AWS infrastructure setup and automation using AWS CLI, boto3, and IAM roles to ensure reproducible and secure ML workflows
• Solid knowledge of algorithms, data structures, statistics, and linear algebra
• Experience with ML frameworks (TensorFlow or PyTorch), including training, refining, and deploying models into user-facing applications
• Experience with distributed systems, Hadoop/Hive ecosystem, or other Big Data technologies
• Proficiency in SQL (Spark/Hive SQL) and building data flows
• Experience with BitBucket/Git, including versioning and branching strategies
• Familiarity with Agile/SAFe frameworks
• Fluency in English
• Nice to have: Experience designing and implementing ML models (e.g., Propensity, Customer Lifetime Value, Micro-segmentation, channel recommendation models)

Technologies you'll work with

• Python, PySpark
• Machine Learning 
• AWS
• SQL
• Big Data
• Agile

Client – why choose this particular client from the Jit portfolio?

Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language. 

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.