Portrait of Alex Hiriavenko

Alex Hiriavenko

Fullstack Developer

Summary

Full-Stack Developer (Vue.js, NodeJS, NestJS, Laravel, TypeORM, PostgreSQL) with hands-on experience building and maintaining high-load CRM systems (≈3K users, healthcare domain).

Strong background in designing scalable APIs, database optimization, and real-time features. Passionate about performance, clean architecture, and delivering reliable solutions that improve user experience and business efficiency.

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.