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Hi, I’m Roman Lototskyi, an AI engineer from Ukraine focusing on prompt engineering, AI integration, and full-stack web development. I design AI-powered tools and scalable applications using MERN, OpenAI APIs, and modern cloud and deployment pipelines. I enjoy turning ideas into reliable software that helps users accomplish tasks with minimal friction. I freelance and work on remote Open Phron.ai projects, building tooling for real-time analytics, prompt evaluation, and dynamic task routing. I’m passionate about clear UX, robust architectures, and automation that reduces costs and speeds up feedback loops.…Hi, I’m Roman Lototskyi, an AI engineer from Ukraine focusing on prompt engineering, AI integration, and full-stack web development. I design AI-powered tools and scalable applications using MERN, OpenAI APIs, and modern cloud and deployment pipelines. I enjoy turning ideas into reliable software that helps users accomplish tasks with minimal friction. I freelance and work on remote Open Phron.ai projects, building tooling for real-time analytics, prompt evaluation, and dynamic task routing. I’m passionate about clear UX, robust architectures, and automation that reduces costs and speeds up feedback loops.

Roman Lototskyi

Full Stack Developer, Back-End Developer, Front-End Developer, +4

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Hi, I’m Roman Lototskyi, an AI engineer from Ukraine focusing on prompt engineering, AI integration, and full-stack web development. I design AI-powered tools and scalable applications using MERN, OpenAI APIs, and modern cloud and deployment pipelines. I enjoy turning ideas into reliable software that helps users accomplish tasks with minimal friction. I freelance and work on remote Open Phron.ai projects, building tooling for real-time analytics, prompt evaluation, and dynamic task routing. I’m passionate about clear UX, robust architectures, and automation that reduces costs and speeds up feedback loops.…Hi, I’m Roman Lototskyi, an AI engineer from Ukraine focusing on prompt engineering, AI integration, and full-stack web development. I design AI-powered tools and scalable applications using MERN, OpenAI APIs, and modern cloud and deployment pipelines. I enjoy turning ideas into reliable software that helps users accomplish tasks with minimal friction. I freelance and work on remote Open Phron.ai projects, building tooling for real-time analytics, prompt evaluation, and dynamic task routing. I’m passionate about clear UX, robust architectures, and automation that reduces costs and speeds up feedback loops.

Available to hire

Hi, I’m Roman Lototskyi, an AI engineer from Ukraine focusing on prompt engineering, AI integration, and full-stack web development. I design AI-powered tools and scalable applications using MERN, OpenAI APIs, and modern cloud and deployment pipelines. I enjoy turning ideas into reliable software that helps users accomplish tasks with minimal friction.
I freelance and work on remote Open Phron.ai projects, building tooling for real-time analytics, prompt evaluation, and dynamic task routing. I’m passionate about clear UX, robust architectures, and automation that reduces costs and speeds up feedback loops.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Ukrainian

Fluent

Work Experience

Senior Software Engineer at CHISELL

July 1, 2025 - July 1, 2025

Led development of 12+ Shopify themes using bespoke Liquid code; upheld brand aesthetics and UX best practices; accelerated average order value by 15% within a 90-day timeframe; optimized site performance reducing load time by 35% and improved mobile experience; developed scalable backend services using Node.js and Express to power real-time analytics dashboard for e-commerce operations; led headless CMS integrations with WordPress and customized Elementor and Beaver Builder to power responsive marketing experiences across 10+ brand sites; built modular WordPress components using Advanced Custom Fields (ACF) and custom Gutenberg blocks to streamline dynamic content creation; built customized RESTful APIs in Node.js to connect Shopify storefront with internal tools such as inventory management and order fulfillment systems, improving operational efficiency and reducing manual error by 70%; deployed RESTful and GraphQL APIs to support frontend apps and mobile platforms with secure, low-l

Senior Full Stack Engineer at Genometec

March 1, 2020 - March 1, 2020

Pioneered a React.js-based data visualization tool ingesting 500,000+ patient records; tool facilitated faster insights into patient health outcomes; implemented mobile-first layouts with Flexbox and CSS Grid; translated UI/UX designs from Figma and Adobe XD into fully responsive, accessible components; improved frontend performance by 35% through lazy loading, code splitting, and bundling optimization; refactored over 15,000 lines of legacy JQuery and inline styles into modular Vue/React components; set up detailed event tracking via Google Tag Manager to monitor user interaction and feature adoption metrics, enabling data-driven iterative design improvements.

Developer at Airway Medix

September 1, 2023 - September 1, 2023

Deployed scalable backend services using Node.js and Express to handle real-time data and high user traffic; maintained a legacy PHP/Laravel stack, reducing SQL injection vulnerabilities by 60% and optimizing database interactions to improve system performance by 35%; integrated Shopify APIs to support storefront operations and built RESTful APIs to synchronize orders, inventory, and customer data with internal tools and fulfillment systems; implemented internal tooling to streamline data handling and reduce manual processing time by 60%.

Full-Stack Web Developer (Freelance / Self-Employed) at Various clients

December 31, 2023 - December 31, 2023

Delivered scalable web applications using React, Node.js, and Express; integrated AI chat and summarization via OpenAI API; developed REST and GraphQL APIs, authentication flows, and responsive UI components; implemented real-time dashboards and data pipelines; optimized backend performance with caching and reduced API costs by ~25%.

AI Engineer & Prompt Specialist at Open Phron.ai

January 1, 2023 - November 18, 2025

Designed AI-powered reasoning platform features, created context memory and conversation threading with MongoDB and Express APIs; built prompt libraries for reasoning, summarization, and code generation; deployed production environment with Docker and GitHub Actions; built dashboards for token usage and latency; automated prompt evaluation with scripted test cases.