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Illia Herasymets

@illiaherasymets

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I build reliable backend systems, REST APIs, automation pipelines, and AI-powered applications.

Ireland

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What I'm looking for

I'm looking to solve backend problems, improve existing systems, and build reliable production software that supports real business needs.

I've built production property-management software at Goldenstay, including customer booking applications, a secure Guest Portal, and an AI assistant using property-specific context.

I design REST APIs, extend Prisma and MySQL data models, and implement reservation and property-management workflows such as Early Check-In and Late Check-Out. I've also built protected integrations with external systems, including a custom WordPress plugin for property mapping, availability, pricing, and booking creation.

At ESTET, I built a Python product-feed pipeline that normalized supplier XML formats and generated consolidated feeds for external sales platforms. I also created a Flask and Vue.js administration panel, real-time parsing feedback, and scheduled feed regeneration.

My work also includes Laravel and Vue.js e-commerce and healthcare platforms, Fastify travel services, and an AI-powered menu application. I enjoy solving backend problems, improving existing systems, and building reliable software for real business needs.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Developer

Current

Goldenstay

Dec 2024 - Present (1 year 8 months)

Developed customer-facing applications and internal management tools for a property management platform, including a booking website and secure Guest Portal with AI assistant. Delivered backend features, integrations, and supported production releases.

JavaScript Fastify Vue.Js Prisma MySQL REST APIs OpenAI API WordPress GitHub Actions Linux Nginx TLS Grafana

Python Developer (Part-Time)

ESTET

May 2023 - Oct 2024 (1 year 5 months)

Built a Python product-feed pipeline that imported supplier XML, normalized data, and generated consolidated feeds for external platforms. Developed an admin panel with real-time progress and automated feed regeneration.

Python Flask Vue.Js Lxml SQLAlchemy XML

Frontend Developer

Redbird Cafe

Nov 2023 - Dec 2023 (1 month)

Maintained and improved the frontend of an AI-powered menu recommendation application built with Vue.js and GraphQL. Resolved UI bugs, implemented new features, and optimized performance.

Vue.Js SCSS GraphQL

Backend Developer

CAC Tour / CAC Edu

Oct 2023 - Oct 2023 (0 months)

Maintained and improved Fastify-based backend services for travel platforms integrated with external tour operator APIs. Fixed issues and implemented improvements across REST APIs and customer-facing applications.

Fastify REST APIs

Full-Stack Developer (Part-Time)

Amrita

Mar 2023 - Jul 2023 (4 months)

Rebuilt and maintained an e-commerce platform using Laravel, Vue.js, and MySQL. Developed a flexible administration panel with hierarchical page management and implemented new business features.

Laravel Vue.Js MySQL

Full-Stack Developer

Save-Health

Jan 2022 - Present (4 years 7 months)

Developed new features for a healthcare platform used by posture specialists, including patient portal functionality and an interactive image analysis tool for spinal angle measurement.

Laravel Vue.Js Image Analysis

Education

Degrees, certifications, and relevant coursework

Illia Herasymets

Bachelor of Science, Computer Science

Backend-focused Full-Stack Developer with 4 years of commercial experience building production software, REST APIs, automation pipelines, and AI-powered applications.