Hi, I'm

Yaroslav Dolhushyn

Full-Stack Engineer

I turn ideas into production-ready apps — from pixel-perfect frontends to resilient backend systems. TypeScript everywhere.

About

About Me

I've shipped 5+ commercial products reaching over 100K users — cutting load times by 40%, reducing infrastructure costs, and building everything from AI-powered voice apps to high-traffic video platforms. I care about code that lasts and teams that grow.

2+ Years

Commercial Experience

5+

Apps Delivered

100K+

Users Reached

M.Sc.

Computer Engineering

My sweet spot is owning features end-to-end: designing the API, building the React or React Native UI, setting up the AWS infrastructure, and making sure it all holds up under real traffic. I've led small teams, mentored juniors, and debugged production issues at 2 AM — the full startup experience.

Now based in Sangerhausen, Germany with full working rights (§24). I'm looking for a team that ships fast, cares about quality, and builds products people actually use. Open to on-site, hybrid, or remote across Germany.

Tech Stack

Skills & Technologies

Frontend

React.jsNext.jsTypeScriptTailwind CSSZustandReduxMobXTanStack QueryRadix UIMUIThree.jsWebSockets

Backend

Node.jsNest.jsExpress.jsPostgreSQLMongoDBRedisKafkaTypeORMPrismaGraphQLREST APIMicroservicesOpenAI / LLM

Mobile

React NativeNative ModulesDeep LinkingPush NotificationsExpoApp Store Deployment

DevOps & Cloud

AWS (S3, Lambda, RDS)DockerGitHub ActionsNginxVercelCloudflareVPSPM2

Tools & Platforms

GitFigmaSentryPostmanSwaggerCursorFirebaseCloud CodeIntercom

Analytics & ADs

CrashlyticsAmplitudeGA4Meta ADsGoogle AdsInstabugMixpanelHotjar

Career

Work Experience

Full-Stack Engineer

Kevych Solutions

Lviv, Ukraine (Remote)

02/2024 — Present
  • AI & Voice Advisory App (Tech Lead): Architected a React Native & Nest.js platform. Enabled voice consultations and AI advice via OpenAI with custom prompting pipelines.
  • Creative Design Platform: Engineered a headless video rendering engine using Puppeteer, Express, and Nginx for server-side React animation rendering.
  • Entertainment & Media: Scaled a multi-platform ecosystem to 70,000+ users across React Native apps and admin panels. Integrated AI-driven features, NestJS APIs, cloud functions, and payments via Stripe & PayPal.
  • Video Course Platform: Handled 2,000+ users and 700+ paid subscriptions in 6 hours using optimized DB indexing and caching.
  • E-commerce Migration: Migrated React to Next.js. Improved LCP/CLS by 40% and reduced hosting costs by 17%.
  • Technical Leadership: Standardized CI/CD pipelines, linting rules, and reusable templates across projects.

Education & Certifications

Master in Computer Engineering

Ternopil Ivan Puluj National Technical University

09/2024 — 01/2026

Specialized in software architecture and cloud computing

Bachelor of Computer Engineering

Ternopil Ivan Puluj National Technical University

09/2022 — 06/2024

Graduated with honors

Bachelor of Artificial Intelligence (Interrupted)

Technical University of Kosice

09/2022 — 01/2023

Focused on AI and machine learning courses

Professional Junior Bachelor's degree

Ternopil State Ivan Pul'uj' Technical College

09/2018 — 06/2022

Graduated with honors

Certifications

AWS Certified Cloud Practitioner CLF-C02 (2025)Front-end React JS Web Development Course (2024)JavaScript + React from scratch to result (2024)

Work

Featured Projects

A selection of commercial products I've built and shipped.

AI & Voice Advisory App

Tech Lead

Architected a full-stack platform enabling voice consultations stored on AWS S3 and AI-powered advice via OpenAI with custom prompting pipelines. Led SDLC as Tech Lead and mentored a junior engineer.

AI-powered voice consultations

React NativeNest.jsOpenAIAWS S3PostgreSQL

Entertainment & Media Platform

Full-Stack Engineer

Delivered a full-stack platform using FSD architecture, scaling a React Native ecosystem to 70,000+ users. Built AI-powered features, internal admin systems, NestJS services, cloud functions, and global payments with Stripe & PayPal.

70,000+ users

React NativeNest.jsStripeReactFirebaseAI

E-commerce Next.js Migration

Full-Stack Engineer

Migrated a legacy React SPA to Next.js. Improved Core Web Vitals (LCP/CLS) by 40% and reduced hosting costs by 17% through Docker containerization. Mentored a junior engineer on Next.js best practices and performance optimization.

40% faster LCP, 17% cost reduction

Next.jsDockerTailwindTypeScript

Video Course Platform

Full-Stack Engineer

Subscription-based learning platform that handled 2,000+ users and 700+ paid subscriptions in just 6 hours after launch. Achieved through optimized DB indexing and caching strategies. Custom NestJS APIs and Stripe integration for seamless payments.

700+ paid subs in 6 hours

Next.jsNest.jsPostgreSQLRedisStripeCloudflare

Headless Video Rendering Engine

Full-Stack Engineer

Built a server-side video rendering engine powering a Canva-like design platform. Executed client-side React animations via Puppeteer, Express, and Nginx, exposing a robust polling API for reliable MP4 exports under high load.

Server-side animation rendering

PuppeteerExpress.jsNginxReactNode.js

Internal CRM Platform

Tech Lead

Built a system for operational management, enabling teams to manage users, workflows, and reporting across the organization. Standardized CI/CD pipelines, linting rules, and reusable templates across projects to improve development efficiency and code quality.

Mentor intern engineers, lead code reviews

ReactNest.jsPostgreSQLTypeORMAWS

Healthcare SaaS Refactor

Full-Stack Engineer

Delivered a full platform refactor and re-architected the signup flow, increasing conversion rates and improving system reliability.

Platform refactor & signup flow re-architecture

ReactNest.jsNext.jsGitHub ActionsTypeORMTypeScriptWhatsApp BotAWSStripeTailwindTwilio

Event & Community Platform

Frontend Engineer

Built features for a marketplace connecting brands with vetted local communities such as run clubs, pilates collectives, and studios, enabling authentic partnerships over cold impressions.

Marketplace connecting brands with local communities

ReactNext.jsTypeScriptTailwindTanstack Query

Contact

Get in Touch

Have a project in mind or want to discuss an opportunity? I'd love to hear from you.

Or reach out directly

yardolhushyn@gmail.com+49 160 425 1263

Based in Sangerhausen, Germany

Open to on-site, hybrid, or remote across the world