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Kosik Ottó
Kosik Ottó

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Hello DEV! 👋 Full-Stack Engineer & CS Student Building Scalable Systems

#discuss #programming #beginners #career

Hi everyone! 👋

I'm Ottó Kosik, a Computer Science Engineering student at Óbuda University, Junior Java Developer at the National Tax and Customs Administration (NAV), and Full-Stack Software Engineer for the Óbuda University Racing Team.

My focus centers on resilient, high-throughput backend architectures, mission-critical enterprise systems, containerized cloud infrastructure, and modern type-safe frontends.

🚀 What I Do

  • Enterprise Backend Engineering (NAV): Developing high-availability, machine-to-machine (M2M) communication services, interface migrations, and data ingestion pipelines utilizing Java and Quarkus.
  • Full-Stack Development (O.U.R. Team): Designing modular services, asset tracking workflows, and centralized identity systems (Keycloak SSO).
  • Teaching & Mentoring: Serving as a University Teaching Assistant, guiding engineering students through programming fundamentals and algorithm design.

🛠 Tech Stack & Core Competencies

  • Backend & Architecture: Java (Quarkus, Spring Boot, Lombok), C# (ASP.NET Core, EF Core), RESTful APIs, JSON / XML (XSD), OpenAPI (Swagger), Dependency Injection, Layered Architecture
  • Frontend Development: React, TypeScript, JavaScript (ES6+), Tailwind CSS, HTML5, CSS3, Bootstrap
  • Databases & Storage: PostgreSQL (JSONB), MySQL, MSSQL, Oracle SQL, Redis, MinIO, SQLite
  • Cloud & DevOps: Docker, Docker Compose, Linux (Debian/Ubuntu, Apache2, Nginx), GitLab CI/CD, AWS (Lambda, API Gateway, S3)
  • IT Operations & Infrastructure: Active Directory (User & Group Management, GPO Drive Maps, NTFS permissions, storage quotas), DNS/DHCP administration & name resolution, Windows Server (GUI & Server Core), Remote Administration (RDP, SSH), Network Administration (IDF/MDF patching, DHCP reservations), CMDB / ITSM asset workflows, PXE / WDS OS deployment, Computer Hardware Lifecycle & Legacy Telecom Restoration
  • Security & Identity: Keycloak SSO, Role-Based Access Control (RBAC)
  • Tools & Methodologies: Git, GitLab, GitHub, Gitea, Jira, Notion, Agile Workflows, Code Review

🔗 Connect & Explore My Work

Looking forward to connecting, sharing software engineering workflows, and diving into enterprise backend challenges with the DEV community! 🚀

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