Roseler Tañedo Jr.

Cybersecurity Enthusiast | Dev

Batangas City, Philippines
roseler@proton.me • +63 945 657 0778 • https://linkedin.com/in/roseler
Roseler Tañedo Jr.

About

Aspiring Cybersecurity Specialist with a strong foundation in secure software development, backend engineering, and network defense. Experienced in implementing role-based authentication, analyzing intrusion datasets, and applying ISO security standards. Skilled in Python, JavaScript, React, Node.js, and Firebase, with hands-on exposure to vulnerability assessment, data security, and threat analysis through academic research, internships, and professional certifications. Passionate about building resilient, secure systems that address real-world challenges.

Experience

  • -

    Cybersecurity Intern @ Redynox

    India - Remote

    Summary:

    • Completed a focused internship involving practical network and web application security assessments, gaining hands-on experience in threat analysis, vulnerability scanning, and secure configuration.

    Responsibilities:

    • Implemented security controls to protect small network environments from common threats
    • Monitored network activity and analyzed suspicious traffic patterns
    • Performed vulnerability scans on a deliberately insecure web application
    • Manually tested for SQL Injection, XSS, and CSRF vulnerabilities
    • Suggested remediation strategies for identified vulnerabilities
    • Promoted cybersecurity best practices via social media engagement
    • Network Security
    • Firewall Configuration
    • Wi-Fi Encryption
    • Wireshark
    • OWASP Juice Shop
    • OWASP ZAP
    • SQL Injection Testing
    • Web Vulnerability Scanning
    • Cybersecurity Awareness
    • Incident Analysis
  • -

    Cybersecurity Trainee @ FusionNode Bootcamp

    Philippines - On site

    Summary:

    • Completed an intensive 6-week training program in cybersecurity fundamentals, enterprise security, and practical defense techniques, gaining hands-on experience in both offensive and defensive security operations.

    Responsibilities:

    • Participated in simulated security operations to detect and mitigate threats
    • Applied penetration testing techniques to assess vulnerabilities
    • Engaged in blue team exercises to enhance incident response and defense capabilities
    • Gained familiarity with industry-standard tools and compliance frameworks
    • Cybersecurity
    • Networking
    • Threat Detection
    • ISO Standards
    • GRC
    • Cryptography
    • Penetration Testing
    • Blue Teaming
    • Threat Landscape Analysis
    • Azure
  • -

    Main Backend Developer @ AdviSync – Academic Advising Platform

    Philippines - Remote/Academic Project

    Summary:

    • Led backend development for AdviSync, a platform designed to enhance adviser–advisee interactions by providing analytics, status tracking, and streamlined class management. Oversaw database architecture and implemented core system features to ensure reliability and scalability.

    Responsibilities:

    • Served as the primary backend developer, coordinating with front-end team members to integrate system features.
    • Designed and managed Firebase Realtime Database structure for optimal performance and scalability.
    • Implemented role-based access control to secure sensitive platform operations.
    • Collaborated in code reviews, testing, and debugging to ensure system stability.
    • Backend Development
    • Firebase Realtime Database
    • Role-Based Access Control
    • Data Synchronization
    • System Architecture Design
    • Collaboration
  • -

    Software Engineer Intern @ Department of Information and Communications Technology

    Batangas City, Philippines - On site

    Summary:

    • Contributed to backend development tasks within a 3-week Agile sprint, including requirements gathering, secure authentication implementation, and developer documentation. Gained additional expertise in cybersecurity and SEO-related vulnerabilities through specialized training.

    Responsibilities:

    • Participated in a 3-week Agile sprint, collaborating with team members to deliver backend features on schedule.
    • Gathered and analyzed technical requirements for assigned development tasks.
    • Implemented and tested role-based authentication for secure application workflows.
    • Assisted in debugging, testing, and optimizing backend code for performance.
    • Attended a cybersecurity course covering legacy hacking techniques, SEO exploits, and data protection best practices.
    • Backend Development
    • Agile Development
    • Role-Based Authentication
    • Cybersecurity
    • Developer Documentation
  • -

    Unit Secretary @ Sunlife Canada

    Batangas, Philippines - On site

    Summary:

    • Assisting in the development and maintenance of software applications using Python and Django. Collaborating with cross-functional teams to ensure quality and timely delivery of software solutions.

    Responsibilities:

    • Handled client queries, requests, and documentation requirements with accuracy and professionalism.
    • Coordinated with multiple Financial Advisors to ensure timely submission and processing of client paperwork.
    • Maintained organized records and filing systems for both digital and physical documents.
    • Liaised between clients, advisors, and internal departments to facilitate smooth communication.

    Achievements:

    • Successfully implemented a tracking system for client requests, improving response times and reducing missed follow-ups.
    • Recognized for maintaining exceptional accuracy in handling sensitive financial documents.
    • Client Relations
    • Administrative Support
    • Document Management
    • Communication
    • Time Management
    • MS Office Suite

Projects

Skills

  • GitHub GitHub
  • Gitlab
  • HTML
  • CSS
  • JavaScript
  • Tailwind
  • Python Python
  • Node
  • MySQL
  • Git
  • Next.js
  • React

Education

Certificates