Вадим

Vadym Bezsmertnyi
Software Engineer

Cherkasy, Cherkasy Oblast, Ukraine
938150664 · [відкрити контакти](див. вище в блоці «контактна інформація»)

LinkedIn, GitHub

Profile
Skills
I am an experienced Full Stack Developer with extensiveexperience in
JavaScript (ES6+) / mobile app development, specializing in ReactJS/React Native, TypeScript,
TypeScript Redux, Node.js, and Testing. With astrong background in both web
React / Next.js and mobile development, Icreate high-quality, user-friendly, and visually
appealinginterfaces.I am passionate about staying up-to-date with the
React Native / Expo
latesttechnologies and industry trends to deliver efficient solutionsfor front-end,
Redux back-end, and mobile applications. I thrive incollaborative environments and
Ant Design / TailwindCSS / enjoy working with cross-functional teams to bring ideas to life and optimize
NativeWind processes.

Node.js / NestJS / Express

Prisma / PostgreSQL / Employment History
MongoDB / MySQL Software Engineer, GeeksForLess Inc.
Supabase November 2023 — Present
Firebase (Auth, Realtime As a Software Engineer, I developed and delivered complex web and mobile
Database, Functions, Push applications, including CRM systems and real-time video streaming platforms.
Notifications) My technology stack included React, Next.js, React Native, Redux, TailwindCSS,
WebSocket / WebRTC Ant Design, NestJS, Prisma, WebSockets, and WebRTC. I focused on integrating
frontend with backend services, designing scalable architectures, improving
RevenueCat / Stripe /
state management, and building intuitive, high-performance user interfaces.
Wayforpay
I implemented subscription management using RevenueCat
Google API / Apple Sign-In
(react-native-purchases) and integrated @react-native-firebase for
/ Facebook Login / Telegram
authentication and real-time database operations. I also connected third-party
API
sign-in services such as Apple, Google, and Facebook. In addition, I built secure
AWS (S3, Cognito/Auth) photo and data storage solutions with firebase-functions, Node.js, and .NET,
Docker / CI/CD / Expo EAS improving reliability and user experience.

Jest / Cypress My projects included order management systems with advanced filtering,
geolocation services, client–executor communication, payments, security, and
Mixpanel / PostHog /
analytics. These solutions required integration with external systems and the
OneSignal / AppsFlyer
delivery of mobile applications tailored for ease of use. I worked extensively with
OpenAI API / GeminiAI complex business logic involving pricing models, route assignment, and service
optimization.
Languages
Beyond feature development, I modernized legacy codebases by introducing
English - B1 TypeScript, performing code reviews, and setting up Expo and Apple Developer
accounts. These efforts streamlined builds, improved delivery efficiency, and
enhanced overall development workflows for clients.
FRONT END DEVELOPER, MemCrab
December 2022 — August 2023

At Memcrab, LLC, I actively contributed to software development using
modern technologies, including ReactJS/TS, Docker, CI/CD, Cypress, HTML/CSS,
JavaScript/TypeScript, React Native, and Jest. My work focused on delivering
scalable solutions, ensuring code quality through testing, and streamlining
development processes with automation.

One of the projects I developed was a financial platform enabling large
companies to perform high-volume buying and selling operations across multiple
accounts. I ensured efficiency, security, and flexibility by applying best practices
and leveraging cutting-edge tools, which significantly improved transaction
reliability and platform stability.

Another project involved building an online store for branded sportswear.
I utilized ReactJS/TS and React Native to create a high-quality, responsive
interface that provided users with an engaging and seamless shopping
experience. To guarantee application reliability, I implemented comprehensive
testing with Jest, which reduced bugs and improved overall stability.

FRONT END DEVELOPER, CyberLeaf, Cherkasy
September 2021 — November 2022

As a Front End Developer at CyberLeaf, I developed and maintained responsive
web applications using ReactJS and TypeScript, ensuring optimal performance
and a seamless user experience. I collaborated closely with designers and
backend developers to implement smooth integrations and maintain consistent
design across platforms. To improve quality and reliability, I optimized
application functionality through rigorous testing and debugging, while also
leveraging Redux for scalable state management. In addition, I stayed up to
date with emerging technologies, applying modern best practices to accelerate
project delivery and strengthen overall development workflows.

Education
Cherkasy Institute of banking The University of banking of the National
bank of Ukraine
September 2012 — July 2016