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Iaroslav Kovalchuk

Junior ML Engineer specializing in energy forecasting and battery optimization

ElecricFishUniversity of MichiganSan Carlos, CA3 Years ExperienceJunior LevelWorks On-Site

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About

Backend/ML engineer working on a battery energy storage system operations dashboard: built a Flask backend integrated with OAuth and a separate FastAPI optimization/simulation service, deployed via Docker CI/CD to Azure Container Apps. Strong in productionizing ML (AzureML to batch endpoints) and in performance/scalability patterns (Postgres indexing/JSONB, per-unit data isolation, async throttling + caching for year-long CPU-intensive simulations across 40+ scenarios).

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Key Strengths

  • Designed modular Flask backend using feature-based blueprints for parallel development
  • Separated compute-heavy simulations into a dedicated FastAPI service (microservices separation of concerns)
  • Built CI/CD to push Docker images from GitHub to Azure and deploy as Container Apps
  • Implemented mandatory pytest test suite gating production pushes
  • Optimized PostgreSQL/SQLAlchemy models with composite indexes and JSONB for complex rate structures
  • Implemented robust transaction handling with commit/rollback guards
  • Operationalized ML via AzureML + batch endpoints with retraining/inference integrated into backend
  • Scaled per-unit workloads using stateless containers and unit-level data isolation
  • Reduced CPU contention by throttling simulations with asyncio.Semaphore and caching previously computed results
  • Domain experience with battery energy storage system (BESS) operations, forecasting, and optimization simulations

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Experience

ML EngineerElecricFish · May 2025 – Present
Data Science InternElecricFish · Jan 2024 – Aug 2024internship
Research AssistantUniversity of Michigan Battery Control Group · Sep 2021 – Dec 2023part-time
Member of Corporate CommitteeMichigan Data Science Team · Jan 2022 – May 2023part-time

Education

University of Michiganbachelor, Data Science; Probabilistic Methods (2025)

Skills

Azure Machine LearningBashCI/CDCC++Computer VisionData CleaningData VisualizationDistributed SystemsDockerETLFastAPIFlaskGitJavaScript

Languages

English

Publications

1 publication

Battery formation modelingSEI growthElectrochemistry

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Iaroslav KovalchukJunior ML Engineer specializing in energy forecasting and battery optimization