Portrait of Alex Hiriavenko

Alex Hiriavenko Fullstack Developer

Summary

Full-Stack Developer (Vue.js, NodeJS, NestJS, Laravel, TypeORM, PostgreSQL) with hands-on experience building healthcare digital products for a multi-location medical network: CRM, public website, patient cabinet, online consultations, appointment booking, payments, and Telegram bot workflows.

Strong background in scalable APIs, PostgreSQL optimization, high-load interfaces, reusable frontend architecture, and reliable integrations for patient and staff workflows.

Graduate of the IT Generation program by the Ministry of Digital Transformation of Ukraine.

Achievements

    • Improved page load speed by 30-80% across frontend and backend flows by trimming unnecessary payload data, removing redundant server requests, and optimizing PostgreSQL queries.
    • Implemented backend proxy for S3 file delivery - improved security (no direct public links) and reduced frontend integration complexity.
    • Delivered a reusable Task Templates module for CRM - employees create new tasks faster and with fewer errors, improving overall workflow efficiency.
    • Built reusable Vue composables and base UI components, including a screenshot upload flow reused in 3 modules (news, comments, tasks) - reduced code duplication and accelerated feature delivery across the project.
    • Delivered high-load healthcare CRM modules (≈3K users) ensuring stability and performance under peak load.
    • Awarded IT Generation grant.

Experience

  • Fullstack Developer

    Palmo ()
    • Developed and maintained ON Clinic's patient-facing digital platform, including the public medical website, patient cabinet, CRM modules, Telegram bot, and online appointment and payment workflows for a multi-location healthcare network.
    • Optimized PostgreSQL queries and API performance with caching and indexing.
    • Enhanced front-end interfaces and introduced reusable hooks/components to accelerate delivery.
    • Collaborated in agile teams with analysts, developers, QA, and DevOps, contributing to design.

  • Front End Developer Internship

    DAN.IT ()
    • Gained hands-on experience working in teams of 3-9 people on full-cycle projects.
    • Took the role of team lead in one project, coordinating task distribution and mentoring peers.
    • Built a social network project using React, Redux, MUI.

Additional Experience

  • Web Development Instructor (Logika School)

    Taught school-age students web development and frontend fundamentals, explaining HTML, CSS, JavaScript basics, and practical project structure in an accessible way.

  • Purchasing Manager (VHH Group)

    Ensured uninterrupted supply of equipment, components, and materials. Conducted market analysis, negotiated and concluded contracts, monitored quality of goods and services.

  • Category Purchasing Manager (LLC "Effect")

    Managed procurement in assigned category, negotiated supplier contracts, and improved inventory turnover. Conducted demand forecasting and market trend analysis to increase sales and turnover.

Education

  • Higher Education: Processing Equipment Engineer

    Donetsk National University of Economics and Trade

    Specialist Degree

Educational & Pet Projects

Non-commercial projects built during training and personal practice.