Personal information hidden

Dmytro Blashchyk Employment
Full-stack Engineer
Senior Full Stack Web Developer 2021 - 2025
Elementica
1. Designed and developed from scratch the high-load SaaS platform Serpnest
for SEO analytics and keyword ranking, implementing an optimized
Personal details microservice architecture and efficient data processing algorithms. The
optimizations implemented in the server side and database structure allowed
the system to process millions of requests with minimal latency, ensuring
Dmytro Blashchyk
stable operation even with a 10-fold increase in load.
2. Architected and implemented the robust backend infrastructure for Nosis.io,
[open contact info](look above in the "contact info" section) an enterprise-grade investment management platform, delivering scalable
microservices that power real-time financial data processing, algorithmic
[open contact info](look above in the "contact info" section) trading capabilities, and secure multi-asset portfolio management. Engineered
high-performance API systems with advanced security protocols that
[open contact info](look above in the "contact info" section) seamlessly integrate with third-party financial platforms while maintaining sub-
blashchyk-07a988151 second response times for millions of transactions, enabling the platform to
deliver hedge fund-level analytics and portfolio visualization to financial
upwork. advisors and investors.
com/freelancers/~0126aa901a4 3. Engineered a sophisticated backend system for an electric vehicle charging
154d73b?mp_source=share network, implementing comprehensive station communication protocols for
seamless operation and asynchronous message processing. Delivered a
@mramid1987 complete solution that manages the full charging lifecycle (initiation, payment
processing, termination) while providing robust API integration with mobile
applications, all deployed on cloud infrastructure to ensure scalability and
reliability for both EV owners and charging station operators.
Skills Technologies: Nest.js, Express.js, Postgress, MongoDB, Redis, AWS, Bull,
RabbitMQ, Microservices architecture, OCPP protocol, TypeORM, Websockets,
Node.js, Nest.js, Express.js, Koa.js SSE, Docker, Git, Node.js, Koa,js, Express.js, Fastify, REST, GraphQL

PostgreSQL, MySQL, SQLite,
MariaDB
Full Stack Web Developer 2019 - 2021
MongoDB, Redis, Memcached Qwerty.Software
1. Active participation in the development and support of a key product of a
RabbitMQ, Redis Pub/Sub, Bull
Ukrainian product company focused on the international market, ensuring its
Queue Provider
stable operation and expansion of functionality.
Stripe, Paddle, Monopay, LiqPay Created a microservice based on Lumen and Elasticsearch to optimize the
platform's search capabilities, which significantly improved the user
Amazon: EC2, Lambda, S3, RDS, experience for customers from different countries.
ElastiCache, Route 53, Elastic Load Updated and optimized the module responsible for synchronizing data
Balancing, CloudFront, CodePipeline, between the main platform and over 100 integrated sites in the product's
CodeBuild, CodeDeploy, SQS, MQ international ecosystem.
Implementation of a refund functionality for the company's internal financial
Firebase Cloud Messaging accounting system, taking into account international financial regulations and
different currencies.
OCPP (Open Charge Point Protocol)
Технології: PHP, Laravel, Node.js, ReactJs, MySQL, React.js, Vue.js, Docker,
PHP, Laravel Git

React.js, Vue.js, Angular.js Web Developer 2017 - 2019
IT Master
REST API, GraphQL, WebSockets, Developed internal sales platform automating processes and boosting
SSE (Server-Sent Events) department efficiency
Created ISAG(g)-compliant information management website enabling global
JIRA, Trello market operations and international data compatibility
Designed Nested Set database architecture optimizing hierarchical data
Languages handling and system performance
Technologies: PHP, Yii2, Laravel, JQuery, WordPress, MySQL, Node.js, Git
Ukrainian

Russian Education
English
Web programming 2015 - 2016
Shag Computer Academy