# Middle ML EngineerRemoteColombia, UkraineWe are looking for a Middle ML Engineer to turn loosely framed business problems into reliable, actionable models for a proprietary trading platform that connects traders with funding opportunities. You will work in a high-load, low-latency environment processing millions of events in real time, taking ownership from problem framing and feature engineering through model testing and business-ready results.### Required for this role* Bachelor’s degree or equivalent in computer science, mathematics, engineering, or a related field, with coursework in **machine learning** or **statistical learning**.* Strong **Python** and **PySpark** skills, with the ability to write clean, tested, maintainable code.* Hands-on experience with a cloud data platform such as **Databricks**, **Snowflake**, **Fabric**, or similar, together with strong **SQL**, including window functions and multi-table joins.* Solid understanding of core **ML concepts**, including cross-validation, overfitting, class imbalance, data leakage in time-ordered data, and selecting evaluation metrics appropriate to the problem.* Hands-on experience with **gradient-boosted trees**, including **XGBoost** and **LightGBM**, as well as **logistic regression**, **support vector machines**, and **k-nearest neighbors**.* Hands-on experience with **clustering methods**, including **k-means** and other approaches.* Experience with some of the following: **survival / time-to-event analysis**, **experiment design and causal inference**, **simulation and Monte Carlo methods**, **probability calibration**, **Bayesian or hierarchical modeling**, and **model monitoring and drift detection**.* Experience taking a model from development into a scheduled or production environment, including experience with **Docker**, **CI/CD**, and **workflow orchestration**.* Ability to explain model behavior, including **feature importance**, **calibration**, and limitations,



and present technical results clearly to a non-technical audience.* Fluent spoken **English (B2)**### Nice to have* Proven experience as a **machine learning engineer** or in a similar role.* Experience in **fintech**, **trading**, or **financial services**.### Your responsibilities* Take loosely framed business problems and develop appropriate ML solutions from scratch.* Explore data, test hypotheses, and iterate on potential approaches in notebooks.* Engineer features and build models using gradient boosting, logistic regression, survival analysis, or hierarchical methods, depending on the problem.* Select rigorous, relevant evaluation metrics based on the business objective and modeling approach.* Validate whether models hold up against the available data and intended use case.* Translate experimental findings and model results into clear, actionable outcomes for the business.* Challenge problem framing when assumptions do not hold, and communicate questions, risks, or blockers early.### What you get### Your time off* 18 paid vacation days and 10 paid sick days annually* 10 Ukrainian public holidays* Maternity and paternity leaves* Marriage and Parenthood Package* Additional leave for major life events* Sabbatical leave opportunities### Learning & growth* Sombra University workshops and internal learning programs* Tech Communities and knowledge sharing sessions* Language courses and workshops* Mentorship opportunities### Health & well-being* Sports compensation or health insurance coverage* Participation in races and marathons* Corporate doctor (telemedicine)* Well-being initiatives and workshops### And even more* Company-provided technical equipment* PE administration and tax support* Internal referral program* IT Club loyalty program* Company events and volunteering initiatives### Before you applyOur recruitment team will carefully review your profile, and if we see a good match with the role, we’ll reach out to you shortly.If you don’t hear from us within 5 business days, it means we’ve decided to continue the process with other candidates for this position. Thanks for understanding.Daria SvitlynetsSend CV
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📌 Middle ML Engineer (Colombia)
🏢 Sombra
📍 Colombia