Senior ML Engineer — FinTech, MLOps & Agentic AI

Traffit; Kraków; Hybrid; PLN 260,000 - 380,000; Full time

Benefits offered by this job

Private medical care

Sports card

Training courses

Hybrid working model

International projects

Job summary

People More in Poland is seeking a Senior Machine Learning Engineer to design, deploy, and maintain production ML systems for FinTech applications, including credit scoring, BNPL features, and agentic AI workflows.

You will collaborate with data engineering and software teams, implement MLOps practices, ensure model explainability, and manage monitoring, retraining, and cost efficiency in a hybrid setup with on-site Kraków/Warsaw options.

Qualifications

• Strong commercial experience in ML engineering in production.
• Full ML lifecycle: feature engineering, model training, validation, deployment, and monitoring.
• Very good knowledge of Python and SQL.
• Practical experience with Spark and/or Databricks at scale.
• Strong understanding of model validation techniques, backtesting, PSI, Gini/KS, and calibration.
• Experience with MLOps, including registries, versioning, CI/CD, monitoring, drift detection, and alerts.
• Knowledge of champion/challenger testing and shadow deployment strategies.
• Familiarity with SHAP and LIME explainability methods and documentation.

Responsibilities

• Designing, developing, and deploying ML models for credit scoring and merchant underwriting.
• Building features using a shared feature store for BNPL and MCA decisioning.
• Collaborating with Data Engineering to define data contracts and SLAs.
• Designing and maintaining agentic workflows, loops, graphs, and guardrails.
• Implementing MLOps processes, including CI/CD pipelines and deployment strategies.
• Monitoring production models for drift and performance, with retraining and rollback plans.
• Ensuring model explainability and regulatory compliance through documentation.
• Supporting CCD2 creditworthiness assessments and regulatory audits.
• Developing automated validation, backtesting, and experimentation frameworks.
• Building cost-efficient, observable ML systems with strong reliability.

Skills

English

Polish

Tools

Python

SQL

Spark

Databricks

SHAP

LIME

LLMs

MLOps

Feature stores

Job description

People More in Poland is seeking a Senior Machine Learning Engineer to design, deploy, and maintain production ML systems for FinTech applications, including credit scoring, BNPL features, and agentic AI workflows.

You will collaborate with data engineering and software teams, implement MLOps practices, ensure model explainability, and manage monitoring, retraining, and cost efficiency in a hybrid setup with on-site Kraków/Warsaw options.