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[open contact info](look above in the "contact info" section) (Mobile)
Denys Chaplyhin
[open contact info](look above in the "contact info" section) Elixir Developer @ Introduct Group | Master's in DS (ongoing)
Ukraine
[open contact info](look above in the "contact info" section)
chaplyhin-13650a226 (LinkedIn)
Summary
Top Skills As an Elixir Developer at Introduct Group, I work on developing
gRPC and maintaining microservices, APIs, and web applications for the
API gambling industry, using technologies such as Phoenix, RabbitMQ,
Elixir gRPC, protobuf, NoSQL, and PostgreSQL. I leverage my expertise
in blockchain technology to create secure, scalable, and reliable
solutions for data management, authentication, and encryption.

Previously, I was a Python Back-End Developer at OctoGamex, an
NFT trading platform that leverages blockchain technology to create
a decentralized and transparent marketplace for digital assets. I was
involved in projects such as refactoring the application, designing
and implementing ETL pipelines and RESTful API services, and
applying event-driven architecture using Celery and RabbitMQ. I also
mentored junior developers, used TDD and pytest, and containerized
the application using Docker.

I am currently pursuing master's degree in data science from
the University of Colorado Boulder, where I study topics such
as machine learning, data science, and distributed systems. I
have a bachelor's degree in biomathematics, bioinformatics,
and computational biology from the University of Chemistry and
Technology in Prague, and another master's degree in pharmacy
from the National Medical University in Kyiv.

I am passionate about learning new technologies and solving
complex problems, and I am always eager to take on new challenges
and collaborate with others. I have a strong engineering background,
with skills in Elixir, Python, FastAPI, Django, k-means clustering,
AWS, Node.js, and TypeScript. I am also proficient in SQL and
NoSQL databases, message brokers, web frameworks, and cloud
services.

Elixir profile: https://exercism.org/profiles/sulfadimetoxin

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Experience
Introduct Group
Elixir developer
September 2022 - Present (2 years 6 months)
Remote

Elixir, Phoenix, RabbitMQ, gRPC, protobuf, microservices, NoSQL,
PostgreSQL.

Upwork
AWS | Node.js | TypeScript - Back-end Developer
February 2022 - February 2023 (1 year 1 month)
Remote

https://www.upwork.com/freelancers/~01e47c345cd2bade67?viewMode=1

OctoGamex | NFT Trading Platform
Python Back-End Developer
October 2022 - January 2023 (4 months)
Vinnytsya, Ukraine

Projects related to blockchain technology:
- complete refactoring of the application
- designing and implementing ETL Pipelines from scratch using Django/
FastAPI
- designing and implementing RESTful API Services from scratch using
Django/FastAPI/Flask
- application architecture design using SQL databases (PostgreSQL/MySQL
(MariaDB)) and NoSQL (MongoDB, ElasticSearch, Redis, Cassandra)
- implementation of Event-driven Architecture using Celery + RabbitMQ
- TDD + pytest
- mentoring of junior developers
- containerizing an application using Docker
- GIT, GitHub Actions
- task and time management in Jira
- SCRUM/AGILE methodologies

Ownity | Trade & Own NFTs Together!
Python Back-End Developer
October 2022 - January 2023 (4 months)
Vinnytsya, Ukraine

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ElephantsLab
Middle/Senior Python Developer
April 2022 - January 2023 (10 months)
Ukraine (Remote)

Projects related to blockchain technology:
- complete refactoring of the application
- designing and implementing ETL Pipelines from scratch using Django/
FastAPI
- designing and implementing RESTful API Services from scratch using
Django/FastAPI/Flask
- application architecture design using SQL databases (PostgreSQL/MySQL
(MariaDB)) and NoSQL (MongoDB, ElasticSearch, Redis, Cassandra)
- implementation of Event-driven Architecture using Celery + RabbitMQ
- TDD + pytest
- mentoring of junior developers
- containerizing an application using Docker
- GIT, GitHub Actions
- task and time management in Jira
- SCRUM/AGILE methodologies

Probos Wallet
Python Back-End Developer
May 2022 - October 2022 (6 months)
Vinnytsya, Ukraine

Projects related to blockchain technology:
- complete refactoring of the application
- designing and implementing ETL Pipelines from scratch using Django/
FastAPI
- designing and implementing RESTful API Services from scratch using
Django/FastAPI/Flask
- application architecture design using SQL databases (PostgreSQL/MySQL
(MariaDB)) and NoSQL (MongoDB, ElasticSearch, Redis, Cassandra)
- implementation of Event-driven Architecture using Celery + RabbitMQ
- TDD + pytest
- mentoring of junior developers
- containerizing an application using Docker
- GIT, GitHub Actions
- task and time management in Jira
- SCRUM/AGILE methodologies

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University of Chemistry and Technology in Prague (UCT Prague)
Python Developer / Data Engineer
June 2021 - April 2022 (11 months)
Prague, Czechia

Projects related to Student Management Systems:
- designing and implementing ETL Pipelines from scratch using Django/Flask
- designing and implementing RESTful API Services from scratch using
Django/Flask
- application architecture design using SQL databases (PostgreSQL) and
NoSQL (ElasticSearch, Redis)
- implementation of Event-driven Architecture using Celery + RabbitMQ
- TDD + pytest
- containerizing an application using Docker
- GIT
- task management in GitHub
- KANBAN/AGILE methodologies

GEGI LLC
3 years 7 months

Data Engineer / Data Analyst
March 2021 - April 2022 (1 year 2 months)
United States (Remote)

QA Specialist / Junior Technical Engineer
October 2018 - February 2021 (2 years 5 months)
United States (Remote)

Education
University of Colorado Boulder
Master's degree, Computer Science · (October 2023)

University of Chemistry and Technology in Prague (UCT Prague)
Bachelor's degree, Biomathematics, Bioinformatics, and Computational
Biology · (September 2019 - June 2022)

National Medical University 'O.O. Bogomolec', Kyiv
Master's degree, Pharmacy · (September 2012 - February 2019)

Dnipropetrovs'ka Deržavna Medicna Akademija

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Master's degree, Medicine · (September 2011 - July 2017)

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