Vitalii

V italii Avdieienko
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») vitalii-avdieienko Kyiv/Remote

Skills
General: JavaScript, TypeScript, HTML5, CSS3, REST APIs, GraphQL, C#
Front-End: React, NextJS, Redux, Zustand, RTK Query, TanStack Query, Axios, React
Hook Form, Tailwind, Shadcn, Material UI, Lucide, Zod, Yup, CASL, i18n
Payments: Stripe, Mobile in-app purchases
Back-End: NodeJS, NestJS, Fastify, Awilix, Prisma, Sequelize, Mongoose, SQL, CRON,
SocketIO, Passport, Auth0, AWS Cognito
Databases: PostgreSQL, MongoDB, Redis
Infrastructure: GitHub CI/CD, Docker, AWS, Azure, GCP, Heroku, Vercel, NGINX, Azure
FrontDoor
Monitoring: Sentry, CloudWatch, Snyk, Mixpanel, Tableau
Message Queues: BullMQ, RabbitMQ, SQS
Messaging: Amazon SNS & SES, Twilio, SendGrid, Nodemailer, Agora
API documentation: Postman, Swagger, Bruno
AI: LangSmith, LangGraph, LangChain, n8n, RAG, MCP, AI Agents, Skills, AI SDKs
Testing: Jest, Mocha, React Testing Library, Cypress, Playwright
CMS: Strapi, Directus

Experience & Achievements
November 2022 - Present (3.5+ years)
Full-Stack Developer/Tech Lead at Lumitech:
Decreased copywriting expenses by 90% by Increased de velopment productivity by 30%
developing an automated AI tool by developing AI tool for creating tickets
Decreased hosting expenses by 80% by Decreased amount of bugs in production by
P -
merging duplicated A I into the single multi 30% by covering the critical application flows
tenant service with tests
Improved average support ticket response Decreased the amount of bugs in
time by 50% by introducing error monitoring production by 20% by introducing branching
and analytics strategy and feature development pipelines
Increased conversion by 10% by introducing Increased application income by 2% by
context-based subscription pop-ups switching the payment provider
D ecreased hosting expenses by 10% by Helped to gain 10 new B2B customers by
optimizing the app build time updating the app to the modern design

May 2022 - November 2022 (6 months)
Full-Stack Developer at Mate Academy:
Increased application income by 15% by Increased conversion to subscriptions by 10%
implementing the new subscription tier by updating the landing page navigation
Education
February 2022 - May 2022 (4 months)
Full-Stack online course at Mate Academy
September 2021 - May 2024 (3 years)
Bachelor of Science in Computer Science and IT at National University "Zaporizhzhia Polytechnic"
September 2017 - May 2021 (4 years)
Professional Junior Bachelor’s degree in Computer Science and IT at Zaporizhzhia Aircraft Applied
College named after O. G. Ivchenko

Summary
Versatile Fullstack Developer with experience delivering end-to-end web solutions across a range of
industries, from healthcare and education to productivity and AI.

Proven ability to lead teams, collaborate with stakeholders, and drive projects from concept to
production.

Comfortable working in fast-paced environments, balancing both Front-End and Back-End
responsibilities, and contributing to technical decision-making.

Committed to building reliable, user-focused products and continuously improving development
processes through mentorship and testing best practices.