Vadym

Vadym Chernykh - Full Stack Engineer
VIDEO INTRODUCTION | TECH BLOG | OPEN SOURCE APPLICATION with REAL-WORLD USERS
WhatsApp | LinkedIn | Gmail | Telegram: @vadim_nzt
Skills

● 10 years of commercial experience in software development
● Solid knowledge of HTML5, CSS3, Javascript, Typescript
● Frontend stack: React.js, Next.js, React Native, Expo, Redux, TanStack, Zustand, Apollo GraphQL, shadcn/ui,
MUI (Material UI)
● Back-end stack: Node.js (Express.js, NestJS), MongoDB, PostgreSQL, Prisma, RabbitMQ, Python (FastAPI),
Golang (Air)
● Unit and integration tests: React Testing Library, Jest, Vitest
● Experience with Docker, Docker Swarm, and Docker Compose
● Experience bundling applications using Webpack, Vite, Storybook
● Experience with i18n translation libraries and Arabic language integration (RTL / Bidirectional layout support)
● 4 years in a Lead position: mentoring, code reviews, creating tasks, gathering requirements, conducting
customer demos, and onboarding newcomers
● CI/CD: GitHub Actions, Bitrise, EAS
● Cloud: AWS (EC2, S3, RDS, DynamoDB, SNS/SQS, Lambda, CloudFront, CloudWatch, IAM)
● VPS: DigitalOcean

Domains: FinTech, Healthcare, Gamedev, Real Estate, Web3, Social Commerce
Languages: Ukrainian, Russian, English: C1
Reference check: "I had the opportunity to work with Vadym at Academy Smart, where he contributed as a Full Stack
Developer on client projects. I appreciate his contribution to the team and wish him every success in his future
endeavors." – Anastasiia Pankratov (Read all references)

Work experience

Academy Smart Ltd. – Backend Developer (AI-Driven) August 2024 – July 2026 (Full-time, Remote)
● Project Context: Built and optimized the backend infrastructure for a Unity-based game engine that helps
VR game developers build projects faster. Focused on moving legacy, self-hosted environments into a
modern cloud ecosystem while introducing advanced AI workflows and high-performance server logic.
● Framework Upgrade: Moved the backend from Express.js to NestJS to leverage TypeScript's strict typing
and clean, layered architecture, making the codebase easier to maintain.
● Faster Game Loads: Set up Bunny CDN for game asset storage, significantly cutting down latency and
speeding up asset load times for global VR developers.
● Monitoring & Logging: Built a production monitoring setup using Grafana and Alloy for real-time metrics,
using Pino for fast, low-overhead structured logging.
● Cloud & Database Migration: Managed the database migration from a self-hosted server over to MongoDB
Atlas to ensure high availability and operational scaling.
● Infrastructure Shift: Transitioned the core infrastructure from self-hosted servers to DigitalOcean to build a
cleaner, more cost-effective cloud system.
● Fixing Concurrency Issues: Replaced outdated Apache servers with Nginx, resolving major traffic
bottlenecks and concurrency issues.
● DevOps Automation: Configured automated CI/CD pipelines to handle testing and push smooth,
zero-downtime deployments straight to DigitalOcean.
● AI-Assisted Development: Orchestrated an advanced AI-assisted development workflow in Cursor,
utilizing Plan Mode, Debug Mode, and tailored Rules and Skills to architect, audit, and validate complex
system logic before runtime. Efficiently offloaded non-critical tasks and local inference workloads to
open-source LLMs like Qwen via Ollama, streamlining execution without compromising performance or data
security.
● Context Integration: Leveraged the Model Context Protocol (MCP) to plug databases directly into the AI
environment, accelerating data modeling and query optimization.
● Automated Security Workflows: Integrated the GitHub Security Lab Taskflow Agent and Cursor Github
Bot to automate PR reviews, catch logic bugs, and patch potential vulnerabilities.

FastCTO – Lead Software Engineer (AI-Driven) April 2023 – August 2024 (Contract, Remote)
● Statra – Mobile App (iOS & Android)
○ Project Context: Acted as a full-stack developer for Statra, a cross-platform enterprise financial
mobile app designed to help business owners track ROI and prevent fraud. Managed both the
frontend mobile architecture and backend data pipelines.
○ Financial Integrations: Built and maintained robust integrations with Plaid, QuickBooks, Finch,
and various US banking APIs to securely aggregate raw financial datasets.
○ Data Aggregation & Refinement: Designed a two-tier data pipeline that ingested raw data into
MongoDB, then cleaned, refined, and structured it into PostgreSQL for optimized reporting.
○ Backend Architecture: Developed services using Golang and Node.js (NestJS), utilizing a
Backend-for-Frontend (BFF) pattern tailored specifically for mobile clients.
○ Mobile Architecture: Designed and implemented a Feature-Sliced Design (FSD) structure (app →
screens → widgets → features → entities → shared) with clean API/UI layering and typed routing.
○ Core Product Delivery: Built dynamic financial KPI dashboards featuring interactive ECharts (line
charts, tooltips), custom date/period filters, sortable data tables, and batch CSV data exports.
○ Auth & Security: Integrated Azure AD B2C OAuth2 (PKCE) alongside a central API client featuring
Circuit Breakers, Exponential Backoff, and Correlation IDs for rapid error tracing.
○ Push Notifications: Built an end-to-end background notification flow (token upload, retries, badge
counts, and infinite-scroll lists) using Node.js, NestJS, and RabbitMQ on the backend.
○ Tooling & Quality: Handled dev/staging/production builds via Expo (EAS), using TanStack Query
for server state management, Zustand for client state, and a unified error-logging flow.

ZenwayCode – Full Stack Team Lead January 2020 – November 2022 (Full-time, Remote)
● Sensi.AI (AppStore, Playmarket)
○ Sensi.AI Mobile App: Built a mobile app from scratch using Feature-Sliced Design that tracks home
audio indicators to notify caregivers of emergencies, while enabling families to monitor metrics and
medical prescriptions.
○ Sensi.AI Web Platform: Designed and deployed a web-based version of the mobile platform,
allowing the client company to onboard more caregivers and scale care services to a larger client
base.
○ API Development: Built the primary product API using Express.js and Prisma ORM, providing
shared, robust backend functionality for both the mobile and web clients.
○ UX Impact: Delivered a highly reliable architecture and smooth UI that ensured caregivers could
respond immediately to critical, life-saving alerts.
● Influencer Marketing Platform (AppStore)
○ Managed an engineering team to develop three distinct applications: a brand-facing web app, a
creator mobile app, and a centralized web admin panel.
○ Performance Overhaul: Introduced rigorous architecture guidelines and cleaned legacy code,
yielding a 21.6% increase in mobile list FPS, removing code duplication, and eliminating unnecessary
re-renders (tracked via SonarQube).
○ Auth Flow Modernization: Replaced an outdated authentication layer with a new system supporting
social registration (Gmail, TikTok, Instagram, Facebook, YouTube), speeding up paid brand account
creation by 43.2% (tracked via Amplitude) and simplifying influencer onboarding.


Additional Professional Experience
● TrustYou – Full Stack Developer (November 2022 - December 2023) | Optimized PR pipelines and migrated
legacy React libraries to an NX.js monorepo monostructure.
● Computools – Full Stack Developer (June 2017 - January 2020) | Reconfigured legacy build systems to
custom Webpack pipelines, accelerating HMR and rendering speeds by 80%.

Education

Zaporizhzhya National Technical University Master's Degree in Computer Science 09/2015 - 05/2021