About Me
I’m Hossein Rezaeian, a tech enthusiast living in the world of app design, web development, and cybersecurity 😎 I also teach more than five programming languages — because I love both learning and sharing knowledge.
Skills
FullStack Web Development
98%
Experience
Remote | Present - 2018
Freelance Full-Stack Developer & Security Consultant
- Built and secured full-stack applications using React, FastAPI, Laravel, and RESTful APIs
- Audited websites and systems for vulnerabilities, delivering pentest reports and mitigation plans
- Developed custom automation tools using Python and Bash
2023 - 2019
Senior Developer - HexCenter Cloud Services
- Developed large-scale web systems for enterprise clients
- Led backend architecture using Laravel and Node.js with strong security focus
- Contributed to multiple SaaS products and cloud-based platforms
2023 - 2022
Senior Backend Developer - Ferdowsi University
- Developed and maintained backend services for university applications
- Optimized databases and APIs for performance and security
- Collaborated closely with business units to align technology with company goals
Present - 2022
Senior Developer & Instructor - University Programming Club
- Oversaw development and mentoring in academic and real-world projects involving Python, C++, and JavaScript.
- Conducted workshops and training sessions on software development best practices.
- Taught programming and security concepts to 100+ students, with a focus on backend development and Linux-based penetration testing.
- Supervised competitive coding and CTF training sessions.
2024 - 2023
Chief Technical Officer - Karovida Holding
- Led the technical strategy and product architecture of the company
- Supervised development teams and ensured code quality, scalability, and security
- Collaborated closely with business units to align technology with company goals
Present - 2023
Lead Security Engineer - Blue Security Team
- Founded and led a team of elite developers and ethical hackers focused on freelance security projects.
- Delivered high-impact solutions to clients in Iran and North America, including secure web application assessments and custom tooling.
- Coordinated multi-role team operations, ensuring clean code, documentation, and delivery.
Present - 2023
Official Instructor - Iran Technical & Vocational Organization
- Delivered professional training courses in programming and cybersecurity
- Audited websites and systems for vulnerabilities, delivering pentest reports and mitigation plans
- Developed custom automation tools using Python and Bash
Present - 2024
Technical Lead – Narchino
- Directed the technical roadmap and led a multidisciplinary dev team
- Implemented CI/CD pipelines and improved system performance
- Ensured project delivery with best coding and security practices
