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Sergey O.
Last update: 11 Jul 2019
ARCHITECT /team lead
Lead Full Stack Developer / Solution Architect
Hi there,

I'm a Lead Full Stack Developer with proven expertise in back-end & front-end development, database and solution architecture. I have dealt with Progressive Web Apps, real-time communications, Clouds. Also, during my growth career, I got huge expertise in scaling microservices and setting up CI/CD processes with AWS/GCP from scratch. I'm good at serverless architecture.
All rates are indicative, annual rate includes 5% discount
5% discount on yearly basis
GMT+2 East Europe
Kyiv/Ukraine, Sanford/USA



Industry Experience

Information services & Technologies, Big Data, E-Commerce & Retail

Product Experience

firmware for telecommunications industry, High-load IoT platform server-side develop, E-Commerce platform


Sep `15 – Present

3 years

Wireless connection manager for IoT-Enabled consumer electronics

Lead Full Stack Developer / System Architect

Scaling Cloud Database/Node.js performance optimizations Develop new features Fix/improve existing features Fix Jenkins builds


CLIENT BACKGROUND The client is an IoT connection provider offering internet connectivity for any smart product, automatically and securely, right out of the box. Cirrent provides a global network of ZipKey Wi-Fi hotspots for connected products through partnerships with ISPs, Wi-Fi onboarding, product lifecycle management. Full description of the project:

Technologies Stack:

Amazon EC2 AWS Express.js GitHub JIRA MongoDB MySQL Node.js Apache Kafka Jenkins Nginx RabbitMQ Docker DynamoDB AWS Lambda


Information services & Technologies


firmware for telecommunications industry, High-load IoT platform server-side develop


Jun `19 – Jul `19

1 month

Big Data ETL

Solution Architect

I was in charge of designing solutions for data extraction, data streaming, processing.

The company providing research services and discovering novel biomarkers especially around sports and personal well-being using state of the art proteomics methods.

Technologies Stack:

Node.js Python Spark Redis Stream Processing Google Cloud Platform Serverless


Big Data

May `18 – Aug `18

3 months

Cezerin - eCommerce platform

Lead Full Stack Developer

I used the latest technologies to build web apps with efficient use of the network. Web app loads once on startup and fetches a smaller amount of data when you request a new page. Building a high-quality Progressive Web App has incredible benefits, making it easy to delight your users, grow engagement and increase conversions.

Cezerin is React and Node.js based eCommerce platform.

Technologies Stack:

GitHub JavaScript JIRA MongoDB Node.js React.js Docker


E-Commerce & Retail


E-Commerce platform


National Technical University of Ukraine "Kiev Polytechnic Institute"

Bachelor's degree in System Analysis

LinkedIn Learning

Serverless Architecture

LinkedIn Learning

Migrating from REST to GraphQL

LinkedIn Learning

Learning GraphQL

IoT and Embedded Systems agency #592

Kyiv/Ukraine, Sanford/USA


E-Commerce & Retail, Information services & Technologies, Mapping & Navigation, Internet & Telecom, Healthcare & Medicine, Safety & Security, Electronics & Equipment, Service & Support, Blockchain & Cryptocurrency, Cybersecurity & Data Protection, Data Science & Machine Learning, Big Data, Automotive

Sirin Software is a service provider of Embedded Linux and IoT solutions with a modern office in the historical center of Kyiv and friendly family atmosphere. In the last few years, we successfully provided various software solutions to US, European and Asian customers. Since 2016 we have started providing Hardware Design services in cooperation with product owners. Our company has expertise in such domains as Networking, Storage Systems, Cloud Computing, Buildings Automation, Drivers, IoT e.t.c. We help business to drive digital transformation across the full product cycle and deliver sustainable innovations to market.


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