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Antony W. — Mid-Level Software Engineer and Cybersecurity Professional from Kenya

Antony W.

Mid-Level Software Engineer and Cybersecurity Professional

Kenya 2-3 years
Open to offersNew to Platform
Languages
English
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About

Antony E. is a skilled Software Engineer and Cybersecurity Professional based in Mombasa, Kenya. He specializes in backend and mobile application development, secure system design, and penetration testing. Antony has contributed significantly to AI system evaluation, enhancing model reasoning and problem-solving. Proficient in Python, C++, SQL, and JavaScript, he operates seamlessly in Linux environments, focusing on secure coding and system optimization. His role as a software engineer involves creating secure, scalable applications and conducting comprehensive security risk analyses. Antony's experience spans various positions including a Security Researcher with HackerOne, where he performs ethical hacking and vulnerability assessments, and as a self-employed engineer, where he leads end-to-end development of mobile and backend systems. As a lifelong learner, he has fortified his knowledge through certifications in penetration testing and ethical hacking, adding value across software and cybersecurity domains.

Experience

  • Software Engineer - AI Evaluation

    AfterQuery Experts · 2025 — Present
    Contributed to the enhancement of AI systems by evaluating software engineering, Linux, and cybersecurity tasks. Provided structured assessments that improved model reasoning and code quality. Analyzed workflows and scripts to identify security risks and potential failure modes. Supported AI development with technical analysis, testing, validation, and feedback.

  • CPTS Trainee – Certified Penetration Testing Specialist

    Cylander · 2024 — 2025
    Completed hands-on training focused on penetration testing, red teaming, and ethical hacking through Hack The Box Academy. Engaged in real-world attack simulations within controlled lab settings, enhancing skills in Linux-based offensive security tools and methodologies.

  • Software Engineer – Mobile Development (iOS & Android)

    Yusanet · 2025 — 2025
    Developed secure cross-platform mobile applications using Ionic Framework, Angular, and Capacitor, implementing security-focused authentication and encryption protocols. Managed the complete app release cycle for both the Apple App Store and Google Play Store, ensuring compliance with security standards.

  • Backend Engineering Student

    ALX Africa · 2023 — 2024
    Developed multiple secure RESTful APIs using Python and Node.js while managing databases in MySQL and PostgreSQL. Built app prototypes with Flutter and Firebase to enhance user accessibility and implemented authentication protocols to mitigate vulnerabilities.

  • Software Engineer

    Self-Employed · 2023 — Present
    Led the end-to-end development of secure mobile and backend systems. Designed and maintained backend infrastructure, APIs, and PostgreSQL databases ensuring real-time synchronization. Developed cross-platform mobile applications, addressing feature implementation and performance optimization. Implemented secure authentication flows and established defensive coding practices.

  • Security Researcher / Bug Bounty Hunter

    HackerOne · 2023 — Present
    Conducted ethical hacking and vulnerability assessments on both web and mobile applications. Identified and documented security flaws, responsibly disclosing them to associated organizations. Focused on penetration testing, network security, and secure application design while collaborating with engineering teams to validate fixes.

  • Cyber Technician

    VICTORIA DIGITAL · 2017 — 2023
    Configured network devices and firewalls, contributing to reduced vulnerabilities and downtime. Provided comprehensive IT support, including hardware repairs and software updates, resulting in high client satisfaction.

  • Computer Instructor

    The Info-Tech Institute · 2021 — 2023
    Instructed over 50 students in cybersecurity and IT tools, helping to enhance their proficiency. Mentored students in programming and ethical hacking, guiding them through various projects while designing comprehensive labs focused on secure coding and network security.

  • Software Engineer

    Upwork · 2022 — Present
    Provided freelance software development and cybersecurity solutions to a global clientele. Developed secure backend systems and mobile applications utilizing Python, Flutter, PostgreSQL, and Firebase. Followed secure coding practices and applied penetration testing techniques in a structured workflow.

  • Network Technician

    GENERATION X SOLUTION LIMITED · 2022 — 2022
    Configured Cisco routers to enhance network uptime and conducted security audits to mitigate vulnerabilities. Troubleshot a range of network issues, achieving swift resolutions.

  • Computer Teacher

    St John’s Baptist Primary School · 2022 — 2022
    Taught computer literacy and cybersecurity to over 60 students, developing lessons on safe internet practices and basic computer operations.

Skills & Expertise

Network SecurityAI and Data ScienceSolidWorksJavascript DeveloperCybersecurity SpecialistAI EngineerPython DeveloperPenetration Tester

Education

  • Certified Penetration Testing Specialist (CPTS)
    Cylander Organization · 2024 — 2025
  • Bioinformatics
    Stanford University · 2025 — 2025
  • Software Engineering
    African Leadership Experience (ALX) · 2023 — 2024
  • CyberSecurity
    Institute of Software Technologies (IST) · 2021 — 2022

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