Aleksandar Milchevski, Developer in Skopje, Macedonia
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Aleksandar Milchevski

Verified Expert  in Engineering

Machine Learning Developer

Location
Skopje, Macedonia
Toptal Member Since
October 30, 2019

Aleksandar拥有超过十年的数据综合研究和开发经验, machine learning, computer vision, and signal/image processing. He enjoys working remotely and solving complex problems. He prides himself on being able to write clean, readable code.

Portfolio

Collab (Toptal Client)
Python, Amazon Web Services (AWS), Amazon rekrecognition, Computer Vision...
Miracle Mill, GmbH
Amazon Web Services (AWS), Amazon Kinesis Data Firehose, AWS Glue...
Leybold (via Toptal)
机器学习,音频单次处理,数字信号处理,Python

Experience

Availability

Part-time

Preferred Environment

Amazon Web Services (AWS), Google Cloud, Python, Linux

The most amazing...

...thing I have worked on is a DNA sequencing software.

Work Experience

Machine Learning Engineer

2020 - 2022
Collab (Toptal Client)
  • 领导了视频处理API的研究和开发.
  • Extracted valuable information from videos using AWS.
  • Used Ruby on Rails for the back-end side of the app.
Technologies: Python, Amazon Web Services (AWS), Amazon rekrecognition, Computer Vision, Audio Processing, Machine Learning, Data Science

Machine Learning Engineer

2019 - 2021
Miracle Mill, GmbH
  • Contributed to several projects using AWS (Glue, SageMaker, DynamoDB, and Lambda) and ETL using Apache Spark.
  • 领导机器学习模型的选择、训练和验证.
  • Placed the algorithms into production.
Technologies: Amazon Web Services (AWS), Amazon Kinesis Data Firehose, AWS Glue, Amazon SageMaker, Machine Learning, Python

Audio Signal Processing Engineer

2020 - 2020
Leybold (via Toptal)
  • Analyzed, processed, and classified sound recordings.
  • 采用离散傅立叶变换(DFT)等信号处理技术.
  • Used logistic regression and other machine learning techniques.
技术:机器学习,音频单处理,数字信号处理,Python

Data Scientist

2016 - 2019
Nucleics
  • 在C/ c++中改进和开发生产就绪的软件.
  • 研究基因组学和DNA测序领域的前沿思想.
  • Implemented and tested several complex ideas, 包括深度卷积神经网络的训练和测试.
技术:DNA测序,生物信息学,机器学习,Keras, Python, R, C, c++

Computer Vision Engineer

2016 - 2017
Sentice Tech
  • Worked on anomaly detection in images.
  • Used OpenCV.
Technologies: Python

Signal Processing Consultant

2016 - 2016
ECGalert
  • 实现了心电信号的处理和去噪.
  • Implemented a pipelined discrete wavelet transform (DWT).
  • 研究了几种FIR和IIR滤波器在心电信号表示中的应用.
Technologies: Digital Signal Processing, C++

Machine Learning Research Scientist

2014 - 2016
NAGI
  • 致力于研究和开发最先进的情感识别算法.
  • 参加第五届国际视听情感挑战及工作坊.
  • Led the development of a people tracking solution through wifi. Implemented the model using Apache Spark.
技术:情感识别,机器学习,MATLAB, Spark, c++, Python

Junior Teaching and Research Assistant

2010 - 2014
Faculty of Electrical Engineering and Information Technologies
  • 为数字信号处理领域的几门课程进行听觉和实验练习.
  • Worked on power quality assessment. 使用机器学习技术检测和分类干扰.
  • 积极参与研究项目《欧博体育app下载》, ERA.NET PLUS project."
  • Utilized OpenCV to implement face detection using SVM.
技术:数字信号处理、计算机视觉、机器学习、MATLAB、C语言

Junior Researcher

2009 - 2011
Dip team
  • 从事JPEG编码图像中环形伪影强度的检测和量化工作.
  • Developed a robust multi-frame super-resolution algorithm.
  • 了解了机器学习和解逆问题的基本思想.
技术:数字信号处理,机器学习,C语言,MATLAB

结合正则化线性回归和增强回归树的多模态情感分析

开发了一种利用视频特征的多模态情感分析方法, audio, electrocardiogram (ECG), 以及结合两种回归技术的皮肤电活动(EDA), namely boosted regression trees and linear regression. Moreover, 为了利用情感维度的时间相关性,提出了一种新的正则化线性回归方法. 最后的预测是使用在不同组的特征上单独训练的回归器的决策级融合得到的. 在基准数据集上获得的良好结果表明了该方法的有效性和有效性.

心电信号滤波的改进流水线小波实现

http://www.sciencedirect.com/science/article/abs/pii/S0167865517302118
在这个项目中,离散小波变换实现了一个带通滤波器去噪心电信号. 采用圆形缓冲器实现了DWT带通滤波器的新改进版本. Time performance analysis and comparison of obtained solution vs. existing solutions was done.

基于机器学习的超分辨率配准误差鲁棒算法

http://ieeexplore.ieee.org/abstract/document/5739234
In this work, 针对存在配准误差和异常值的情况,提出了一种新的两阶段鲁棒超分辨方法. In the first phase, 使用机器学习方法为指示配准错误存在的每个LR(低分辨率)图像创建权重矩阵. In the second phase, 使用所有LR图像和相关权重矩阵执行超分辨率, creating an image that is free of error artifacts.

适用于人脸去识别问题的通用人脸检测和姿态估计算法

在这项工作中,解决了图像中的人脸去识别问题. 解决这个问题的第一步是设计一个成功的通用人脸检测算法,该算法可以检测图像或视频中的所有人脸, regardless of the pose. If the face detection algorithm fails to detect even one face, 去识别算法的影响可以被抵消. 为此,提出了一种新的人脸检测算法,用于人脸检测和姿态估计. The algorithm uses an ensemble of three linear SVM classifiers. The first, second, and third SVM classifier estimates the face's pitch, yaw, and roll angle, 并使用逻辑回归将结果组合并输出最终决策. Second, 利用人脸检测结果和一种简单的空间变异体去识别算法,展示了同时进行人脸检测和人脸去识别的好处.
2013 - 2015

Progress towards a Ph.D. in Machine Learning

马其顿斯科普里电子工程和信息技术学院

2009 - 2013

Master's Degree in Signal Processing

马其顿斯科普里电子工程和信息技术学院

2005 - 2009

Bachelor's Degree in Electronics and Signal Processing

马其顿斯科普里电子工程和信息技术学院

JULY 2020 - JULY 2023

AWS Certified Data Analytics - Speciality (prev. Big Data)

AWS

NOVEMBER 2019 - NOVEMBER 2022

AWS Machine Learning - Speciality

AWS

SEPTEMBER 2019 - SEPTEMBER 2021

Google Cloud Certified Professional Data Engineer

Google Cloud

APRIL 2019 - PRESENT

谷歌云平台的数据工程、大数据和机器学习

Coursera (GCP)

FEBRUARY 2019 - PRESENT

Machine Learning with TensorFlow on Google Cloud Platform

Coursera (GCP)

JUNE 2018 - PRESENT

Deep Learning

Coursera (deeplearning.ai)

Libraries/APIs

TensorFlow, Keras, Amazon Rekognition, OpenCV

Tools

MATLAB, AWS Glue, Amazon SageMaker

Languages

C++, C, Python, R

Paradigms

Data Science

Storage

Google Cloud

Industry Expertise

Bioinformatics

Frameworks

Spark

Platforms

Linux, Amazon Web Services (AWS)

Other

Machine Learning, Digital Signal Processing, Big Data, Deep Learning, Amazon Kinesis Data Firehose, Audio Single Proccessing, DNA Sequencing, Computer Vision, Emotion Recognition, Signal Processing, Electronics, Audio Processing

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