# Denys Astafiev Denys Astafiev is a remote worker on Himalayas, Senior Full-Stack Engineer at Independent Consultant, based in Slovakia. Source: https://himalayas.app/@denysastafiev ```text Senior Full-Stack Engineer at Independent Consultant who delivered a three-application vehicle inspection platform in three months. ``` | Detail | Value | | --- | --- | | Availability | Looking for a job | | Location | Slovakia | | Authorized to work in | Slovakia | | Salary expectations | 36k+ EUR | | Job categories | Full Stack Engineer, Backend Engineer, DevOps Engineer, Technical Lead | | Skills | Fullstack Development, Backend Development, API Design, REST API Development, System Architecture, Database Design, Query Optimization, Data Migration, Event Driven Architecture, Data Synchronization, Message Queues, Payment Systems Integration, Stripe Connect, Escrow, Mobile Application Developer | | LinkedIn | https://linkedin.com/in/denys-astafiev-106536238 | | GitHub | https://github.com/DenAst17 | ## About ```text At CarSalePro LLC, I delivered a three-application vehicle inspection platform in three months: an offline-first Flutter mobile app, a NestJS backend with 134 REST endpoints, and a Next.js marketplace. I started alone and then led two contract developers. I built the platform’s Stripe Connect escrow payments, including payout retries and dispute handling, and added safeguards against money-loss scenarios. I also developed offline data synchronization and on-device vehicle document and VIN scanning. At Atlanta, I owned the API, data model, CRM integration, and delivery infrastructure for a real estate portal with more than 100,000 monthly users. I built a CRM-to-database synchronization pipeline and resolved a production search timeout. Across my work at Videfy.ai, Insight Dev, Bytehive, and CGS-team, I’ve delivered AI, analytics, and marketplace products. My work has included integrating more than 20 AI models, building an AI reasoning system, and developing automated insights for an analytics platform. ``` ## Experience ### Senior Full-Stack Engineer (current) Independent Consultant. Dec 2025 - Present ```text Delivered production platforms end to end for startup and agency clients, covering architecture, backend, frontend, mobile, and delivery infrastructure. ``` Skills: Architecture, Backend-Development, Frontend-Development, Mobile-Development, DevOps, Delivery-Infrastructure ### Technical Lead and Full-Stack Engineer CarSalePro LLC. Jun 2026 - Aug 2026 ```text Led development of a greenfield vehicle inspection platform, delivering three applications in three months and leading two developers. ``` Skills: Flutter, Dart, River-Pod, Drift, SQLite, Google-MLKit, NestJS, TypeScript, Prisma, PostgreSQL, Redis, BullMQ, Next.js, React, Tailwind, Next-Intl, MapboxGL, Stripe-Connect, Cloudflare-R2, Render, Vercel, Codemagic, Docker, Playwright ### Backend and DevOps Engineer Atlanta. Mar 2026 - Jun 2026 ```text Owned the API, data model, CRM integration, and delivery infrastructure for a real estate portal with over 100,000 monthly users. ``` Skills: TypeScript, NodeJS, NestJS, Pnpm, TurboRepo, PostgreSQL, PostGIS, Prisma, Redis, RabbitMQ, Zod, OpenAPI, Swagger, JWT, Docker, Docker-Compose, Bitbucket-Pipelines, Hetzner, Linux ### Full-Stack Engineer Videfy.ai. Feb 2026 - Mar 2026 ```text Integrated over 20 AI models for photo and video generation into a unified system and built infrastructure for dynamic admin-driven model onboarding. ``` Skills: AI-Integration, ML-Model-Onboarding, System-Architecture, Performance-Optimization ### Full-Stack Engineer Insight Dev. Dec 2025 - Dec 2025 ```text Architected a NestJS backend with modular domain-driven design and engineered a two-phase AI reasoning system on OpenAI GPT models with LangChain. ``` Skills: NestJS, TypeScript, PostgreSQL, MikroORM, OpenAI-GPTs, Lang-Chain, Telegraf, Twilio, Winston, JWT, Swagger ### Full-Stack Developer Bytehive. Oct 2024 - Sep 2025 ```text Architected and developed a full-stack analytics platform with AI-driven automation, onboarding first paying clients within 3 months and contributing to a 6-figure investment. ``` Skills: React, NestJS, fastAPI, ExpressJS, PostgreSQL, MySQL, SQLite, TypeScript, Python, Jest, Playwright ### Full-Stack Developer CGS-team. Jan 2022 - Oct 2024 ```text Developed frontend and backend features for a dual-sided marketplace platform, designed database schemas, and conducted code reviews. ``` Skills: React, Next.js, Vue.Js, NestJS, ExpressJS, PostgreSQL, MongoDB, TypeScript, JavaScript, Material-UI, styled-components, React-Query, TypeORM, Redux, Bitbucket, Jira, Notion, Jest ## Education ### Taras Shevchenko National University of Kyiv Bachelor of Science, Computer Science and Cybernetics. 2021 - 2025 ```text Pursued a Bachelor of Science in Computer Science and Cybernetics, while working full-time as a software engineer. ``` ### MongoDB MongoDB Node.js Developer Path, Node.js Development ```text Completed the MongoDB Node.js Developer Path certification. ``` ### MongoDB MongoDB for SQL Professionals, Database ```text Completed the MongoDB for SQL Professionals certification. ``` ### SoftServe .NET Certified Specialist, .NET ```text Earned the .NET Certified Specialist certification. ``` ## Tech stack - OpenAPI - AWS IAM - GitHub - Bitbucket - Docker Compose - GitHub Actions - Bitbucket Pipelines - Flutter - Drift - PostGIS - MySQL - PostgreSQL - MongoDB - SQLite - Node.js - Next.js - NestJS - Tailwind CSS - Material-UI - Redis - Jira - styled-components - Jest - Vue.js - JavaScript - Python - HTML5 - Dart - RabbitMQ - BullMQ - FastAPI - TypeORM - MikroORM - Linux - iOS - Stripe - Notion - Prisma - Cloudflare WAF - AWS Lambda - Redux - Vercel - TypeScript - Git - Docker - Twilio - Cloudflare Pages - Render - SQL - LangChain - Shadcn/ui - Cloudflare Workers - Playwright - TanStack Query - Cloudflare D1 - Zod - Bash - Cloudflare R2 - React Hook Form - Codemagic - Winston - Next-Intl - Android To contact Denys, message them from this profile with a Himalayas employer account: [Hire on Himalayas](https://himalayas.app/hire). ## People also viewed - [Allyson David](https://himalayas.app/@allysondavid1): Integration Developer, Mad Software - [david kapitan](https://himalayas.app/@davidkapitan): Full Stack Engineer, Visa - [Edgar Buchek](https://himalayas.app/@edgarbuchek): Senior Full Stack Engineer, Digicode - [Martin Horvath](https://himalayas.app/@martinhorvath): Software Engineer, Incubeta - [Samad User](https://himalayas.app/@samaduser4): Senior Full Stack Engineer, Sopra Steria - [Ming Chen](https://himalayas.app/@mingchen): Senior Software Engineer, Intercom - [Glenn Kaizo](https://himalayas.app/@glennkaizo1): Senior Full Stack Engineer, Filament Syfter AI - [Michal Stepan](https://himalayas.app/@michalstepan): Senior Full Stack Engineer, Eleks - [Denys Astafiev](https://himalayas.app/@denysastafiev1): Senior Full Stack Engineer, Independent Consultant - [Danylo Holovin](https://himalayas.app/@danyloholovin): Senior Full Stack Engineer, Enter AI