Андрій

ANDRII DRYHA
SENIOR FULL STACK DEVELOPER
[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY
Senior Full Stack Developer with more than 4 years of experience designing and deploying
scalable web applications across EdTech, FinTech, and SaaS domains. Expertise in modern
JavaScript/TypeScript ecosystems, cloud architecture, and distributed systems. Proven
proficiency with React.js, Next.js, NestJS, and AWS infrastructure. Strong background in CI/CD
automation, containerization, and test-driven development. Track record of architecting
solutions that improve user engagement by 45%+ and reduce infrastructure costs through
optimization.

SKILLS
Programming Languages: JavaScript (ES6+), TypeScript, SQL, HTML5, CSS3
Frontend Technologies: React.js, Next.js, Redux, Zustand, Material-UI, Tailwind CSS, Storybook,
Webpack, Vite
Backend Technologies: NestJS, Node.js, Express.js, REST APIs, GraphQL, Microservices
Architecture, WebSockets
Databases: PostgreSQL, MongoDB, MySQL, Redis, Elasticsearch
Testing Frameworks: Jest, React Testing Library, Cypress, Playwright, Supertest, Mocha
DevOps & Cloud: AWS (EC2, S3, Lambda, RDS, CloudFront, SQS, SNS, ECS, EKS), Azure, Docker,
Kubernetes
CI/CD & Version Control: GitHub Actions, Jenkins, GitLab CI/CD, Git, Bitbucket
Authentication & Security: JWT, OAuth2, Auth0, Passport.js, OpenID Connect
Additional Tools: Postman, New Relic, DataDog, Jira, Confluence, Slack API

WORK EXPERIENCE
Senior Full Stack Developer | Railsware | February 2024 - April 2026
EdTech Learning Management Platform (LMS)
Architected React.js + Material-UI frontend for 50k+ students/educators with interactive
course creation, assignment tracking, and real-time progress dashboards
Designed NestJS microservices backend with GraphQL API supporting multi-tenant SaaS
architecture with granular role-based access control
Implemented PostgreSQL relational database with Redis caching layer for sub-100ms query
response times on analytics queries
Deployed containerized application on AWS ECS with auto-scaling, RDS Multi-AZ for high
availability, and S3 for multimedia content storage
Configured GitHub Actions CI/CD pipeline with automated testing, security scanning, and
blue-green deployments to production
Achieved 99.8% uptime SLA and reduced page load time by 48% through database
optimization, code splitting, and CloudFront CDN integration
 Student Assessment & Proctoring System
Built Next.js + Tailwind CSS frontend with WebRTC video streaming for secure remote exam
monitoring and real-time proctor-student communication
Developed Express.js backend with WebSocket connections handling 10k+ concurrent exam
sessions with low-latency video feed processing
Integrated MongoDB for flexible exam session records and PostgreSQL for assessment
analytics with compliance logging for FERPA/GDPR
Deployed on AWS Lambda (serverless) with CloudFront CDN, S3 for video storage, and SQS
for async video processing and analysis
Implemented Auth0 authentication with biometric verification, JWT token rotation, and
end-to-end encryption for all exam data
Achieved 99.9% uptime during peak exam periods, processed 50k+ exams monthly, and
detected 98% of suspicious behavior through AI-based proctoring

Full Stack Developer | Digis Group | August 2021 - November 2023
FinTech Payment Processing & Wallet Platform
Built React.js dashboard with Redux for merchants to manage $50M+ annual transaction
volume, settlements, disputes, and financial reporting
Developed NestJS microservices architecture with REST APIs for payment processing, PCI-
DSS compliant card tokenization, and fraud detection using ML models
Structured PostgreSQL transactional database with ACID compliance for payment records
and MySQL analytical database for reporting and business intelligence
Deployed on AWS EC2 auto-scaling groups with RDS Multi-AZ, S3 encrypted storage, and
SQS for asynchronous payment processing queues
Implemented JWT authentication with rate limiting, OAuth2 for third-party merchant
integrations, and comprehensive audit logging for compliance
Reduced payment processing latency by 35% through query optimization, implemented
caching strategies, and achieved 99.95% transaction success rate

SaaS Subscription Management & Billing System
Designed Next.js + Zustand frontend for white-label subscription platform serving 500+
businesses managing subscriptions for 100k+ end customers
Created Express.js backend with GraphQL API supporting custom plan creation, tiered
pricing, dunning management, and automated invoice generation
Implemented MongoDB for flexible subscription schemas and PostgreSQL for immutable
billing records with complete audit trail
Deployed containerized application on AWS ECS with application load balancer, auto-
scaling policies, and S3 for invoice document storage
Integrated Stripe and PayPal APIs for multi-currency payment processing, implemented
webhook handlers for payment confirmations, and automated retry logic
Configured GitHub Actions pipeline with Jest/Playwright testing (85%+ code coverage) and
reduced customer churn by 12% through improved renewal UX

EDUCATION LANGUAGES
Computer Science, Bachelor's Degree (2018 - 2022) English: B2 (Upper-Intermediate)
Donbass State Engineering Academy Ukrainian: Native