Metropistas - Route Assistance
Road assistance app for highways in Puerto Rico. Integrates geolocation, coverage validation, and push notifications.
- Spring Boot
- SwiftUI
- Kotlin
Hernan Hawryluk
Full-Stack Developer · Backend Specialist
Specialized in Java and Spring Boot, with experience designing and implementing REST APIs, microservices, and distributed systems, as well as deploying applications in cloud environments.
I focus on building scalable, high-performance backend systems while applying best practices in architecture, security, and relational database management (SQL).
About Me
I apply security best practices (OWASP) when designing and developing APIs and backend services. I have implemented secure authentication (JWT / OAuth2), access control, sensitive data protection, and rate limiting. I also optimize performance using Redis caching, real-time communication with WebSockets, and automated testing with JUnit.
I work with Cloud infrastructure and DevOps practices, mainly on AWS, using Docker and configuring CI/CD pipelines to automate deployments and manage production environments. I also have experience in web development with React, Next.js, and Tailwind, as well as mobile development with React Native, Swift / SwiftUI, and Kotlin / Jetpack Compose, including publishing and maintaining apps on the App Store and Google Play.
My Projects
OUT - Bars & Experiences
Mobile app designed to explore and discover cocktail bars in Buenos Aires. Includes instant reservations, discount implementation, and experience purchases.
- React Native
- TypeScript
- Expo
Smart Store - E-Commerce
Complete e-commerce platform with product management, shopping cart, advanced search, secure payments via Stripe, and an admin panel to manage products and orders.
- Next.js
- TypeScript
- Tailwind
Instagram Clone
Fully functional Instagram replica that reproduces the core features and user experience of the original platform, offering a modern, smooth, and fully operational interface.
- React Native
- Expo
- Firebase
NBL Renders
Promotional website for high-quality architectural renders, featuring animations, custom design, and unique illustrations, optimized to attract clients and deliver an exceptional user experience.
- HTML5
- CSS
- JavaScript
Interactive Render
Interactive 3D experience that allows users to explore and customize an apartment, adjusting finishes and lighting for an immersive and detailed visualization.
- Unreal Engine 5
- SketchUp
My Skills
- JavaScript
- TypeScript
- React Native
- Expo
- Swift
- SwiftUI
- Kotlin
- Jetpack Compose
- Java
- Spring Boot
- Python
- Django
- REST Framework
- SQLite
- MySQL
- PostgreSQL
- Firebase
- MongoDB
- Prisma
- Bash
- AWS
- App Store
- Google Play
- Docker
- HTML
- CSS
- React
- Node.js
- Express
- Next.js
- Tailwind
- Bootstrap
- Git
- GitHub
- Figma
- Asana
- Jira
- Trello
- Unreal Engine
Certificaciones
My Experience
Bytewave - Innovation in Software
Full-Stack Developer
I develop and maintain backend services and REST APIs in Java with Spring Boot for production environments used by applications with thousands of active users. I collaborate on web interfaces with React and mobile applications with React Native. I manage AWS infrastructure, CI/CD pipelines, GitHub repositories, and the deployment of releases to the App Store and Google Play. I also collaborate with clients on defining technical requirements and planning features.
February 2024 - PresentFreelance
Full-Stack Developer
Designed and developed complete commercial projects including backend services, web and mobile applications, as well as AWS infrastructure configuration and CI/CD pipelines. I also managed publishing and maintaining apps on the App Store and Google Play. Some of these projects exceeded 10,000 active users and received excellent client feedback.
October 2022 - March 2024Platzi - Coursera
Self-Taught Student
Completed front-end, back-end, and mobile development specializations through advanced courses on international platforms such as Platzi and Coursera, strengthening my skills through real products and commercial projects.
December 2021 - February 2024Contact Me
Don't hesitate to get in touch! I'm excited about new job opportunities. You can do so through this form, by sending me a direct email, or by connecting with me on LinkedIn or GitHub. Looking forward to connecting!