# Denys Astafiev Denys Astafiev is a remote worker on Himalayas, Senior Full-Stack Engineer at Independent Consultant, based in Slovakia. Source: https://himalayas.app/@denysastafiev1 ```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, Payment Systems, Stripe Connect, Escrow, DevOps, CI CD | | LinkedIn | https://linkedin.com/in/denys-astafiev-106536238 | | GitHub | https://github.com/DenAst17 | ## About ```text At CarSalePro LLC, I delivered a vehicle inspection platform in three months: an offline-first Flutter app, a NestJS backend with 134 REST endpoints, and a Next.js marketplace. I implemented Stripe Connect escrow payments and an offline-first data layer, then led two contract developers. At Atlanta, I owned the backend 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. At Bytehive, I architected and developed an AI-driven analytics platform, integrated evaluation systems, and helped onboard the first paying clients within three months of development. The product secured a 6-figure investment within its first year. As an Independent Consultant, I deliver production platforms for startup and agency clients across backend, frontend, mobile, and infrastructure. My work has also included AI decision-support and video-generation platforms, as well as commercial marketplaces. ``` ## Experience ### Senior Full-Stack Engineer (current) Independent Consultant. Dec 2025 - Present ```text Deliver production platforms end to end for startup and agency clients: architecture, backend, frontend, mobile, and delivery infrastructure. Four client engagements to date. ``` Skills: Architecture, Backend, Frontend, Mobile, DevOps, Delivery-Infrastructure ### Technical Lead and Full-Stack Engineer CarSalePro LLC. Jun 2026 - Aug 2026 ```text Delivered three applications in three months: an offline-first Flutter mobile app, a NestJS backend with 134 REST endpoints, and a Next.js marketplace. Led two developers and built two-sided marketplace payments with escrow on Stripe Connect. ``` 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 Designed and built the backend of a real estate portal with more than 100,000 monthly users, including 36 feature modules, 39 data models, and 44 database migrations. Engineered a real-time data synchronization pipeline and owned the delivery infrastructure. ``` 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 more than 20 AI models for photo and video generation into one unified system. Built infrastructure for dynamic admin-driven model onboarding and resolved critical system faults. ``` Skills: AI, Model-Integration, System-Architecture, Stability, Performance ### Full-Stack Engineer Insight Dev. Dec 2025 - Dec 2025 ```text Architected a NestJS backend with modular domain-driven design and more than 13 feature modules. 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 as the core feature, onboarding the first paying clients within 3 months. Integrated AI evaluation systems and led client communication and requirements gathering. ``` Skills: React, NestJS, fastAPI, ExpressJS, PostgreSQL, MySQL, SQLite, TypeScript, Python, Jest, Playwright ### Full-Stack Developer CGS-team. Jan 2022 - Oct 2024 ```text Developed complex frontend features for contractor-facing and client-facing applications with React, Next.js, and Vue.js. Built backend services with NestJS and Express.js, and implemented RESTful APIs and business logic. ``` 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 Bachelor of Science in Computer Science and Cybernetics. Worked full-time as a software engineer during the complete degree. ``` ### 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 - Amazon EC2 - Amazon S3 - GitHub - Bitbucket - Docker Compose - GitHub Actions - Bitbucket Pipelines - Flutter - Drift - PostGIS - MySQL - PostgreSQL - MongoDB - SQLite - Node.js - Next.js - NestJS - .NET - Tailwind CSS - Material-UI - Redis - Jira - styled-components - Jest - Vue.js - JavaScript - Python - HTML5 - Dart - Mapbox - RabbitMQ - BullMQ - FastAPI - TypeORM - MikroORM - Linux - iOS - pnpm - Stripe - Notion - Prisma - Cloudflare WAF - AWS Lambda - Redux - Vercel - TypeScript - Git - Docker - Twilio - Cloudflare Pages - Render - SQL - LangChain - Turborepo - 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/@denysastafiev): Senior Full Stack Engineer, Independent Consultant - [Danylo Holovin](https://himalayas.app/@danyloholovin): Senior Full Stack Engineer, Enter AI