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SMCallan/README.md 
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👋 Hi, I’m Callan

🎯 Software Engineer | Cybersecurity Specialist | Applied Researcher in Digital Ethics
📍 United Kingdom | 📧 ask for my email | 🌐 GitHub Profile

🚀 About Me

I’m a Software Engineer with an MSc in Computer Science and a background in Technologies and Psychology, specialising in software engineering. My experience ranges from developing resilient backend systems for national critical infrastructure to creating modern data pipelines and dashboards for private industry, as well as bespoke cross platform applications.

I focus on:

  • Building secure, large-scale systems with resilience and uptime guarantees (ideally >99.9%).
  • Modernising legacy platforms (e.g., reverse-engineering Assembly-era systems && beyond!).
  • Applied cybersecurity research, including vulnerability analysis and ransomware defence.
  • Bridging technology and ethics, ensuring systems are both robust and responsible.
  • uAtomation & optimising processes, desiging repeatable, verifiable solutions.

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🛠️ Tech Stack & Skills

Here is a taste of some technologies or concepts I have worked with in either a professional or academic capacity. While not an exhaustive list it gives a look at my experiences as a SWE with added Security specialism. Languages: Python • Java • C++ • C • Bash • SQL • JavaScript (React.js) • Node && others
Security: Penetration Testing • Network Analysis • OWASP Top 10 • Vulnerability Assessment
Cloud & DevOps: AWS • Git • CI/CD • Microsoft Azure • Google Cloud (GCP) && all that good stuff
Systems & Tools: Linux/Unix Systems • Windows / Mac • Computing • Networks • Internet • Hacking
Engineering: Distributed Systems • Secure Coding • API Design • Algorithms • System Hardening
I also stay relatively uptodate with AI research & technology.

📂 Professional Projects

🔐 Critical Infrastructure Resilience System
Resilient backend (Python/C++) with automated monitoring and recovery, ensuring >99.9% uptime.

🧩 Legacy System Modernisation
Reverse-engineered a 1980s Assembly system and rebuilt it using modern stacks, delivering long-term ROI.

📊 Data Pipeline & Dashboard
Automated Java/Python/SQL pipelines for real-time business intelligence with interactive dashboards.

🛡️ Cybersecurity Tools & Scripts
Python-based penetration testing tools, ransomware detection, and network defence scripts.

🧑‍💻 Continuous Learning & Conferences

Too long to go into but I attend many tech events in London & am continuing to learn every day.

🌐 Let’s Connect

✨ “I have been compared to a wizard.”
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