Євген

Yevhen Havryliuk
Senior Frontend Developer
[открыть контакты](см. выше в блоке «контактная информация») | t.me/YamborghiniBlack | [открыть контакты](см. выше в блоке «контактная информация») | github.com/yhavryliuk

ABOUT
Frontend developer with 12+ years of experience. Worked mainly with React, Next.js, and Angular —
including several large migrations from legacy codebases. Background spans healthtech, edtech, and IoT
products. Familiar with NestJS and GraphQL on the backend, but the frontend is where I feel most confident.

TECHNICAL SKILLS
Languages JavaScript (ES2020+), TypeScript, PHP
Frontend React, Next.js, Redux, Redux-Saga, RTK Query, React Native, Angular
(AngularJS 1.x → Angular 21)
Familiar with Node.js, NestJS, GraphQL, PostgreSQL, Redis, NX monorepo
Tooling Vite, Webpack, Gulp, Docker, Git, GitLab CI, Travis CI
Testing Unit testing, E2E testing
Other a11y (accessibility), Segment, DataDog

EXPERIENCE
Senior JavaScript Developer — Telemedicine Platform 09.2021 – 04.2025
Web and backend multi-tenant platform for healthcare providers.
•​ Frontend migration: AngularJS 1.x → React → Next.js; worked in NX monorepo with Apollo Federation
(GraphQL) backend.
•​ Worked on real-time video consultation module (WebRTC) and call extension flows.
•​ Implemented HIPAA-compliant document workflows: BAA support, electronic document signing.
•​ Worked on accessibility (a11y / WCAG) across the frontend.
•​ Frontend integration of Segment and DataDog analytics.
•​ Occasionally helped with minor backend tasks (NestJS/GraphQL) — mostly frontend work.

Senior JavaScript Developer — EdTech Platform 04.2019 – 09.2021
Student self-assessment and university matching platform.
•​ Maintained and progressively migrated a large AngularJS 1.x codebase to Angular 10.
•​ Developed data-driven student profile evaluation system with university admission readiness scoring.
•​ Helped stabilise CI/CD and participated in code review processes.

JavaScript Developer — Medical Smart Tools 08.2018 – 04.2019
IoT device management platform for personal and industrial use.
•​ Built React/Redux/Saga web app and React Native mobile client for managing specialized medical-grade
IoT sensors used in hospital environments.
•​ Developed real-time notification system for device status monitoring and incident alerts.
•​ Wrote E2E tests with Travis CI integration; maintained stable coverage across web and mobile clients.
•​ Stack: React, Redux, Redux-Saga, React Native (frontend/mobile); Node.js/Express backend was
handled by other team members.

JavaScript / C++ Developer — IP Telephony Enterprise 08.2017 – 07.2018
Large-scale corporate VoIP platform with complex back-office tooling.
 •​ Built and maintained a large-scale ERP admin panel in AngularJS 1.x for managing telephony
infrastructure, users, and billing.
•​ Implemented C++ components for performance-critical telephony processing logic.

JavaScript / PHP Developer — SmartSpace UA (EdTech) 03.2016 – 08.2017
Educational platform with tutor matching and interactive assessments for children.
•​ Developed a tutor-matching web application with AngularJS 1.x frontend and Yii 2 (PHP) backend —
search, filtering, and profile management.
•​ Built interactive test-taking applications for children: multi-type assessments, score calculation, and
SVG-based animations for feedback and engagement.

JavaScript / PHP Developer — Early Web Development 03.2013 – 02.2016
besplatka.ua, WordPress templates
•​ Built a CRM system from scratch for a call center: lead management, operator workflows, and call
tracking.
•​ Developed an ad and banner management module — uploading creatives, arranging them on
configurable page grids, and exporting layouts to Adobe InDesign for automated newspaper page
composition.
•​ Fullstack development, plugin integration, and basic server setup (CentOS, Nginx).

SIDE PROJECTS & INTERESTS
•​ MMORPG Backend — Java pet project with server-side game logic, database integration, and
performance optimization.
•​ Admin Panel & API — Angular 21 frontend with NestJS backend, containerized and deployed on K3s.

EDUCATION
IT Step Academy — Software Development
English: Intermediate (B1)