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hernanhawryluk/README.md

Hi 👋 My name is Hernan

CTO & AI-Native Full-Stack Engineer

Backend development · Application security · End-to-end product delivery

Visit my portfolio Cambiar idioma al español Connect on LinkedIn Visitor Badge

I'm a Full-Stack Engineer specializing in backend development with Java and Spring Boot and application security. I lead and build digital products end to end, from requirements and architecture to implementation, deployment, and production operations.

My experience spans backend services, REST APIs, and web and mobile applications. I also manage AWS infrastructure, CI/CD pipelines, and app releases on the App Store and Google Play.

I work directly with clients and stakeholders to define priorities, shape product roadmaps, and make technical decisions that balance delivery speed, scalability, costs, and maintainability.

  • 📍 Based in Monte Grande, Buenos Aires, Argentina.
  • 🚀 CTO & Full-Stack Developer at Hako Software since September 2024.
  • 🛠️ Building commercial software since 2022, before adopting AI-assisted development.
  • 📈 My experience includes projects that exceeded 10,000 active users.
  • 🌐 Explore my portfolio for project details and my repositories for code and documentation.

How I work with AI

I integrate Spec-Driven Development (SDD) and AI agents into my engineering workflow, with specifications, project context, and validation guiding the work.

  1. Specify: define the problem, requirements, constraints, and acceptance criteria.
  2. Provide context: document architecture, conventions, integrations, and project decisions.
  3. Coordinate agents: divide work into defined tasks for analysis, implementation, testing, and documentation.
  4. Review and validate: inspect code changes, run tests, and check behavior against acceptance criteria and architectural decisions.
  5. Deliver and maintain: integrate changes, deploy, and follow their behavior in production.

I remain responsible for technical decisions, code quality, security, and the final deliverable.

Technical expertise

Area Technologies and practices Applied experience
Backend Java, Spring Boot, Python, FastAPI, Django, Django REST Framework, Node.js, Express REST APIs, business logic, external integrations, and production services.
Application security JWT, OAuth2, OWASP practices, access control, rate limiting Authentication, authorization, API protection, and secure handling of application data.
Web JavaScript, TypeScript, React, Next.js, HTML, CSS, Tailwind CSS, Bootstrap Component-based interfaces, state management, API integration, and responsive layouts.
Mobile React Native, Expo, Swift, SwiftUI, Kotlin, Jetpack Compose Cross-platform and native applications, backend integration, and store releases.
Data and performance MySQL, PostgreSQL, SQLite, MongoDB, Firebase, Prisma, Redis, WebSockets Data modeling, persistence, query optimization, caching, and real-time communication.
Cloud and delivery AWS, Docker, Bash, Git, GitHub, CI/CD, observability Infrastructure, environment management, deployment automation, and production operations.
Engineering with AI SDD, agent orchestration, context management, automated testing, code review Structured implementation workflows, documented decisions, and validated deliverables.
Product and collaboration Figma, Jira, Asana, Trello, Agile methodologies Requirements, prioritization, roadmap planning, interface implementation, and team coordination.
Interactive 3D Unreal Engine 5, SketchUp Architectural visualization with interactive finishes and lighting.

Development journey & contributions

Explore my repositories and contribution history to see my work and how my projects have evolved over time.

Animated snake following my GitHub contribution grid

Let's connect

If you're developing a product, evolving a platform, or looking for technical leadership, let's talk.

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  1. instagram-clone-app instagram-clone-app Public

    Fully functional Instagram replica built in React Native, showcasing my skills as a mobile app developer. Explore the features and functionality of Instagram in this project.

    JavaScript 42 23

  2. ecommerce-nextjs-app ecommerce-nextjs-app Public

    A fullstack e-commerce website developed in Nextjs. This platform features a responsive design, comprehensive cart functionality, seamless Stripe payment integration, and a robust dashboard for eff…

    TypeScript 11 4

  3. portfolio-nextjs-app portfolio-nextjs-app Public

    My portfolio website crafted using Next.js, TypeScript, and Tailwind CSS. It boasts full responsiveness, multilingual support, light and dark modes, engaging animations, and robust form validation.

    TypeScript 3

  4. little-lemon-django little-lemon-django Public

    Web server for a restaurant designed in Python with Django architecture. Features include dynamic content templates, secure forms, user authentication, online reservations, dish reviews, and an API…

    Python

  5. tasks-nodejs-backend tasks-nodejs-backend Public

    This backend component forms an integral part of a full-stack project crafted using React and Node.js, powered by the Express framework.

    TypeScript 1

  6. ThreadsCloneApp ThreadsCloneApp Public

    Work in progress...

    Swift 1