Machine Learning Engineer – Mid/Senior
Location
Brazil
Posted
17 hours ago
Salary
0
Seniority
Senior
Job Description
Machine Learning Engineer – Mid/Senior
Kognit - Committed to Transforming
• Develop tabular ML models for operational decision-making: risk classification (XGBoost), dynamic pricing (gradient boosting), and combinatorial assignment optimization (Google OR-Tools). • Operate models in shadow mode with human-in-the-loop (HITL) validation before any automation. • Build the MLOps pipeline: training in Azure ML, model registry in MLflow, inference deployment (FastAPI/Docker) on AWS, with environment promotion and rollback. • Define metrics and backtesting with point-in-time correctness using the Feature Store. • Implement drift monitoring, automated retraining, and canary/A-B deployment via CI/CD. • Serve models via low-latency inference APIs (online features in Redis), with OpenAPI contracts.
Job Requirements
- Bachelor's degree in Data Science, Computer Science, Statistics, Engineering, Mathematics, Economics, or related fields.
- English or Spanish (international client).
- Strong Python skills for production ML (not just notebooks).
- Experience with tabular models using gradient boosting (XGBoost or similar) — imbalanced classification, probability calibration, regression.
- Model evaluation and backtesting: AUC/Recall/Precision, MAPE/MAE/RMSE, temporal validation and point-in-time correctness.
- MLOps: model versioning and registry (MLflow or equivalent), training/deploy pipelines in CI/CD, environment promotion and rollback.
- Model serving via API (FastAPI or equivalent) in Docker containers.
- SQL for data extraction and preparation.
Benefits
- Contractor — PJ (we are looking for long-term partners).
- Remote work.
- Working hours: 8 hours per day (168 hours monthly).
- Time bank with quarterly settlement (payment for positive balance hours).
- Variable compensation after 4 months of contract.
- Flexible benefits card: BRL 700.00 per month for meals (Flash card).
- Paid leave: 7 consecutive days after 1 year of contract; 15 days after 2 years; 21 days between 5 and 7 years; and 30 days from 8 years onward.
- Birthday day off: one day off in your birthday month.
- Partnership with Wellhub.
- Partnership with Open English.
- Partnership with FIAP.
- Partnerships with clinics and psychological services.
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