Full Stack Engineer

Mykhailo Barsukov

Crafting digital experiences, one line of code at a time. Full‑stack developer with a passion for elegant solutions and continuous learning.

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Backend & Architecture

Scalable microservices, event-driven systems, high-performance APIs.

Building microservices with event-driven patterns using RabbitMQ and Redis Pub/Sub,Designing RESTful and GraphQL APIs with proper error handling and documentation,Optimizing database performance through indexing, query tuning, and caching strategies,Implementing multi-tenant architectures with proper data isolation and security,Working with message queues for async job processing and real-time data streaming

Node.js
Express
NestJS
TypeScript
PostgreSQL
MySQL
MongoDB
RabbitMQ
Redis
REST APIs
GraphQL
WebSocket
Microservices
Event-driven architecture
Supabase
Swagger

Security & Authentication

Multi-factor auth, OAuth flows, API security best practices.

Implementing TOTP-based two-factor authentication for enhanced security,Building role-based access control (RBAC) systems with granular permissions,Securing APIs with JWT tokens, OAuth flows, and proper validation,Protecting against common vulnerabilities (SQL injection, XSS, CSRF),Conducting security audits and implementing fixes for production systems

JWT
OAuth 2.0
TOTP (2FA)
bcrypt
HTTPS/TLS
CORS
Rate limiting
Helmet.js
Security headers

Frontend Development

Modern React applications, state management, responsive design.

Building responsive, mobile-first interfaces with modern React patterns,Managing complex application state with Redux Toolkit and Context API,Implementing server-side rendering and static generation with Next.js,Writing maintainable component libraries documented in Storybook,Ensuring code quality through comprehensive unit and integration testing

React
Next.js
TypeScript
JavaScritp
Redux Toolkit
React Query
React Hook Form
jQuery
Tailwind CSS
SASS
Material UI
Radix UI
Jest
React Testing Library
Storybook
i18next

DevOps & Infrastructure

Docker deployments, CI/CD automation, cloud infrastructure management.

Containerizing applications with Docker for consistent deployments across environments,Setting up CI/CD pipelines for automated testing and deployment,Managing cloud infrastructure on AWS with security-first approach,Configuring and optimizing Nginx for high-performance web serving,Administering Linux servers with focus on security and reliability

Docker
Kubernetes
AWS EC2
AWS S3
AWS RDS
AWS DynamoDB
AWS API Gateway
AWS Lambda
AWS CloudWatch
AWS IAM
Google Cloud Platform (GCP)
GitHub Actions
GitLab CI
Nginx
Linux
Ubuntu
Git

Leadership & Collaboration

Team mentorship, code reviews, technical communication.

Leading project recovery efforts and rebuilding development teams,Onboarding and mentoring junior developers on architecture and best practices,Conducting code reviews to maintain quality and share knowledge,Delivering technical presentations and workshops to educate teams,Bridging communication between technical teams and stakeholders

Agile/Scrum
Kanban
Jira
Slack
Code reviews
Technical documentation
Team mentoring

Performance & Optimization

Query optimization, caching strategies, load time improvements.

Optimizing database queries and implementing proper indexing strategies,Implementing caching layers with Redis for improved response times,Improving page load speeds through code splitting and lazy loading,Profiling application bottlenecks and implementing performance fixes,Achieving measurable performance improvements (22%-35% faster response times)

Database indexing
Redis caching
Query optimization
Chrome DevTools
Lighthouse
Load testing
Performance profiling

Skills

Full-Stack Development

My skill set encompasses a range of technologies essential for full-stack development.

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Backend & Architecture

Scalable microservices, event-driven systems, high-performance APIs.

Security & Authentication

Multi-factor auth, OAuth flows, API security best practices.

Work Experience

Career Milestones

A timeline of my career progression and notable accomplishments.

Full-Stack Developer at BriveX

Nov 2024 – Present

Key Achievements

Architected a multi-tenant financial platform with dynamic RBAC and complex data relations.
Engineered a Node.js transaction service achieving consistent sub-50ms response times for balance updates.
Optimized PostgreSQL queries for 100k+ record tables, boosting core performance by 35%.
Deployed event-based architecture using RabbitMQ for async jobs and Redis Pub/Sub for real-time notifications.
Implemented TOTP-based 2FA and migrated storage from GCP to an internal system to improve security and control.
Developed an automated tier system that calculates personalized financial terms based on user activity.

Technologies & Skills

Node.js
Express.js
PostgreSQL
RabbitMQ
Redis
TypeScript
AWS
GCP
Database Optimization
React

Full-Stack Developer at The WhyKingz

Dec 2023 – Oct 2024

Key Achievements

Stabilized a critical project mid-development, resolving security vulnerabilities and rebuilding the engineering team.
Re-engineered notification services, reducing message queue processing time from 2 hours to 15 minutes (87.5% reduction).
Built an AI-powered SaaS with real-time Supabase subscriptions and an OpenCanvas-based editor.
Created an automated SEO audit system and content pipeline that parses 100,000+ HTML files in seconds.
Developed a bot-filtering solution using IPv6 lookups to protect server resources.
Managed EC2 infrastructure with a security-first approach and designed scaling strategies for future growth.

Technologies & Skills

Node.js
Express.js
PostgreSQL
MongoDB
Supabase
AWS
Linux
Nginx
SEO
Team Leadership
Security

Full-Stack Developer at Onix-Systems

Oct 2022 – Dec 2023

Key Achievements

Led development of a global ERP search functionality impacting 400+ internal colleagues.
Refactored legacy codebase to TypeScript and Redux Toolkit for improved state management and type safety.
Developed an e-commerce platform integrated with headless CMS and managed MySQL schema design.
Managed a site redesign for a US-based client under tight deadlines, including i18n support and SEO optimization.
Standardized development workflows by documenting components in Storybook and implementing JEST unit tests.
Introduced AI-powered productivity tools to the development team to optimize code generation.

Technologies & Skills

Next.js
TypeScript
Redux Toolkit
MySQL
JEST
Storybook
i18n

Backend Developer at Self-Employed

May 2020 – Feb 2022

Key Achievements

Developed a student card platform integrating Monobank API and DIIA government KYC verification.
Built real-time inventory synchronization webhooks between e-commerce platforms and KeyCRM.
Implemented Stripe payment processing and automated course access for an online language school.
Designed a complex restaurant ordering system with dynamic modifiers and conditional pricing logic.

Technologies & Skills

Node.js
Express.js
KeyCRM
Stripe
KYC Integration
Webhooks
REST APIs
PostgreSQL
MongoDB
Client Communication

BriveXNov 2024 – Present

The WhyKingzDec 2023 – Oct 2024

Onix-SystemsOct 2022 – Dec 2023

Self-EmployedMay 2020 – Feb 2022

Full-Stack Developer

BriveXNov 2024 – Present

Key Achievements

Architected a multi-tenant financial platform with dynamic RBAC and complex data relations.

Engineered a Node.js transaction service achieving consistent sub-50ms response times for balance updates.

Optimized PostgreSQL queries for 100k+ record tables, boosting core performance by 35%.

Deployed event-based architecture using RabbitMQ for async jobs and Redis Pub/Sub for real-time notifications.

Implemented TOTP-based 2FA and migrated storage from GCP to an internal system to improve security and control.

Developed an automated tier system that calculates personalized financial terms based on user activity.

Core skills

Node.js

Express.js

PostgreSQL

RabbitMQ

Redis

TypeScript

AWS

GCP

Database Optimization

React

Full-Stack Developer

The WhyKingzDec 2023 – Oct 2024

Key Achievements

Stabilized a critical project mid-development, resolving security vulnerabilities and rebuilding the engineering team.

Re-engineered notification services, reducing message queue processing time from 2 hours to 15 minutes (87.5% reduction).

Built an AI-powered SaaS with real-time Supabase subscriptions and an OpenCanvas-based editor.

Created an automated SEO audit system and content pipeline that parses 100,000+ HTML files in seconds.

Developed a bot-filtering solution using IPv6 lookups to protect server resources.

Managed EC2 infrastructure with a security-first approach and designed scaling strategies for future growth.

Core skills

Node.js

Express.js

PostgreSQL

MongoDB

Supabase

AWS

Linux

Nginx

SEO

Team Leadership

Security

Full-Stack Developer

Onix-SystemsOct 2022 – Dec 2023

Key Achievements

Led development of a global ERP search functionality impacting 400+ internal colleagues.

Refactored legacy codebase to TypeScript and Redux Toolkit for improved state management and type safety.

Developed an e-commerce platform integrated with headless CMS and managed MySQL schema design.

Managed a site redesign for a US-based client under tight deadlines, including i18n support and SEO optimization.

Standardized development workflows by documenting components in Storybook and implementing JEST unit tests.

Introduced AI-powered productivity tools to the development team to optimize code generation.

Core skills

Next.js

TypeScript

Redux Toolkit

MySQL

JEST

Storybook

i18n

Backend Developer

Self-EmployedMay 2020 – Feb 2022

Key Achievements

Developed a student card platform integrating Monobank API and DIIA government KYC verification.

Built real-time inventory synchronization webhooks between e-commerce platforms and KeyCRM.

Implemented Stripe payment processing and automated course access for an online language school.

Designed a complex restaurant ordering system with dynamic modifiers and conditional pricing logic.

Core skills

Node.js

Express.js

KeyCRM

Stripe

KYC Integration

Webhooks

REST APIs

PostgreSQL

MongoDB

Client Communication

Achievements

Learning & Growth

Continuous learning is essential for staying current in web development. Here are my key certifications:

Fwdays+DevRain AI Conference Participation

Typescript: The Complete Developer's Guide

Modern React with Redux

The Web Developer Bootcamp 2022

Feedback

Insights from collaborators and mentors.

"Mykhailo communicates effectively with colleagues and often takes on organizational responsibilities beyond his primary duties. Thanks to his initiative and quick decision-making, we successfully overcame a crisis during the launch of a Telegram bot."

Oleksii SavchukHead of Department

"Mykhailo is a professional in full stack development. He approaches work professionally and with attention to detail. Always offers different ways of solving problems, looks for non-standard approaches."

Maksim RiabchenkoTeam Lead

"I can only say that he is a professional in his field! The solutions he brought to our projects were very useful, his approach and influence on the team was at a high level! The quality and speed with which he approached the projects was at the level of a senior developer."

Stanislav ZhehlovFull-Stack Developer

Contact Me

Let’s Connect

I'm open to discussing new projects, sharing ideas, or potential collaborations.