Mykhailo Penkherskyi

Senior full-stack software engineer · Product engineer

penxerscky@gmail.com penhersky.net linkedin.com/in/penherskyLviv, Ukraine

Lviv, Ukraine (UTC+2/+3) · Independent contractor — direct or via employer of record · Full overlap with EU & UK hours, US East Coast mornings to 1pm ET · Remote, or hybrid in Lviv · Notice 2–6 weeks · 9:00–20:00 Kyiv

Experience

Dec 2025 — nowGeniuseeMarketing · SEO

Senior full-stack software engineer

Core implementation of a generative-engine optimization platform: it helps brands see and improve how their content surfaces in the answers of AI engines like Claude, ChatGPT, Gemini and Perplexity. A TypeScript monorepo built with Bun, spanning a customer-facing web app, an admin dashboard and supporting services.

TypeScript · Bun · React · Next.js · Firebase · AI-SDK · Langfuse · Tailwind

Aug 2021 — Nov 2025IncoraHealthcare ×3 · Security · Education

Full-stack software engineer

Four years across healthcare, security and education. The healthcare work was patient management and data visualisation — D3.js for clinical PDF reports, Three.js for real-time dashboards. In security, back-end microservice architecture for hardware performance data analysis.

TypeScript · Node.js · Fastify · Express · PostgreSQL · Sequelize · AWS · React · Redux Toolkit · Saga · Next.js · Socket.IO · MUI

Apr 2020 — Jul 2021Self-employedE-commerce

Full-stack Node.js — React developer

Full-stack e-commerce work: multiple online stores integrated with one central CRM and store-management system, plus a React Native application for employee management access.

TypeScript · Node.js · Express · Nest.js · MongoDB · React · React Native · Ant Design

Skills

LanguagesTypeScript · JavaScriptCloudAWS · AzureBack endNode.js (Express, Fastify, Koa, Nest) · ServerlessDatabasesPostgreSQL · Firebase · MySQL · MongoDB · SQLite · RedisAPIREST · GraphQL · Socket.IOFront endReact (SPA, Next.js, Gatsby) · Redux (Toolkit, Saga, Thunk) · Recoil · HTML · CSS (SCSS, LESS, Tailwind) · React Native · PWA · Three.js · D3.jsAIai-sdk · OpenRouter · LangfuseToolsGit · Cursor · Claude Code · Docker · Bun · Postman

Certifications

AWS Certified AI PractitionerAWS Certified Solutions Architect — AssociateAWS Certified Developer — AssociateAWS Certified Cloud PractitionerMicrosoft Certified: Azure Fundamentals

Education

2017 — 2023

Lviv University of Nature Management

Specialty 126 — Information Systems and Technologies

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