Вадим

Vadym Bezsmertnyi
Full-Stack Software Engineer
AI Automation Engineer
React • React Native • Node.js • CRM Systems • AI Workflow Automation
Cherkasy, Cherkasy Oblast, Ukraine [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section) github.com/VadymBezsmertnyi
[open contact info](look above in the "contact info" section)
CORE EXPERTISE
Full-Stack Engineering · Mobile Engineering · GIS & Geospatial Systems · Native iOS/Android Development · Secure Content
Distribution · Large-File & Object Storage Pipelines · Payment & Subscription Systems · AI Workflow Automation · Backend
Architecture
PROFESSIONAL SUMMARY
Full-Stack Software Engineer with experience building web and mobile applications, CRM systems, and real-time
communication platforms. I work primarily with React, React Native, TypeScript, Node.js, NestJS, Prisma, Firebase,
WebSocket, and WebRTC. Recently, I have focused on AI-assisted workflows, OpenAI and Gemini integrations,
Claude/Cursor-driven development workflows, MCP-based integrations, and business process automation.
CORE TECHNOLOGIES
FRONTEND React · Next.js · TypeScript · Redux Toolkit · RTK Query · Ant Design · TailwindCSS · NativeWind
· Axios · React Hook Form · Zod · Web Workers
MOBILE React Native · Expo · Redux Toolkit · RTK Query · Swift · Kotlin · Native iOS/Android Module
Development · MapLibre
BACKEND Node.js · NestJS · Express · REST API Design · WebSocket Architecture · WebRTC · Webhooks ·
BullMQ · Queue-Based Processing · Background Job Processing
DATABASES PostgreSQL · MongoDB · MySQL · Prisma · Supabase · Redis · SQLite
CLOUD & DEVOPS AWS S3 · AWS Cognito · Docker · CI/CD · Expo EAS · Firebase · Railway · Cloudflare R2 · Object
Storage Architecture · Presigned URLs · Multipart / Resumable Uploads · Large-File Processing
GIS & GEOSPATIAL PostGIS · MapLibre · GeoJSON · GIS Processing Pipelines · Terrain-RGB / Hillshade Pipelines ·
On-Device Georeferencing · Homography / Projective Transforms
SECURITY Applied Cryptography · Secure Content Distribution · Envelope Encryption · Signed Access
Tokens · PostgreSQL RLS
PAYMENTS &
SUBSCRIPTIONS
RevenueCat · Stripe · Wayforpay · In-App Purchases · Payment & Subscription Systems
AUTHENTICATION &
INTEGRATIONS
Google API · Apple Sign-In · Facebook Login · Telegram API
AI & AUTOMATION OpenAI API · Gemini API · Claude · Cursor · MCP-based Integrations · Prompt Engineering · AI
Workflow Automation · Business Process Automation · CRM Automation
ANALYTICS Mixpanel · PostHog · AppsFlyer · OneSignal
TESTING Jest · Cypress
COMMUNICATION Telegram · Instagram · Facebook Messenger · Viber · SendGrid · Cityhost · EmailJS
TELEPHONY UniTalk · TurboSMS · Ringostat
MEETINGS Zoom
LANGUAGES
English (B1)

PROFESSIONAL EXPERIENCE
GeeksForLess Inc. November 2023 — Present
Full-Stack Software Engineer / AI Automation Engineer
Contract · Remote
Built full-stack web and mobile applications using React, Next.js, React Native, Expo, TypeScript, Node.js,
NestJS, Prisma, Firebase, WebSocket, and WebRTC.
Developed CRM systems, real-time video communication platforms, mobile applications, and business workflow
automation features.
Integrated OpenAI API and Gemini API services into internal workflows and product features.
Connected third-party APIs for authentication, payments, analytics, communication, and CRM operations
including Google, Apple, Facebook, Telegram, RevenueCat, Stripe, and Wayforpay.
Worked on complex business logic including pricing models, route assignment, order management,
geolocation, service optimization, and client–executor communication.
Refactored legacy code to TypeScript, improved Redux state management, and supported Expo EAS mobile
delivery workflows.
MemCrab December 2022 — August 2023
Front End Developer
Built web and mobile features with React, TypeScript, React Native, Docker, and CI/CD pipelines.
Worked on a financial platform for high-volume buying and selling operations across multiple accounts.
Developed a responsive e-commerce application for branded sportswear on web and mobile.
Improved platform stability with Jest and Cypress testing and automated development workflows.
CyberLeaf, Cherkasy September 2021 — November 2022
Front End Developer
Built and maintained responsive web applications with React and TypeScript.
Collaborated with designers and backend developers on UI integrations and cross-platform feature delivery.
Used Redux for state management and improved application quality through testing and debugging.
Applied modern front-end practices to speed up delivery and support team workflows.
EDUCATION
Cherkasy Institute of banking The University of banking of the National bank of September 2012 — July 2016
Ukraine