Francis Offiong (0xkali Zubimendi)Hi, my name is
I build secure, scalable systems that matter.
Security-focused Software Engineer and Cyber Security Analyst based in FCT, Nigeria. I specialize in full-stack development, penetration testing, digital forensics, and cloud security — building systems that are fast, secure, and production-ready.
01. About Me
I'm a Security-focused Software Engineer and Cyber Security Analyst with hands-on experience in application development, digital forensics, penetration testing, and cloud security.
I have a proven ability to design secure systems, analyze cyber threats, and build scalable web and mobile solutions aligned with industry best practices. Whether it's architecting a fintech backend with fraud detection or performing live penetration tests on organizational infrastructure, I bring a security-first mindset to every project.
I hold a B.Sc in Cyber Security from Ritman University (GPA: 4.72) and have completed the Google Cybersecurity Professional Certificate, the CISCO Cybersecurity Analyst Career Path, and the 14G Cyber Security Scholarship Program. I'm currently a React Native Engineer at Ulospaces and Fullstack Engineer at Kosmotech Developers.
02. Experience
Ulospaces · Lagos, Nigeria
Kosmotech Developers · Abuja, Nigeria
National Cybercrime Center (NPF-NCCC) · Abuja, Nigeria
Freelance · London, UK
Orion Industrial · Abuja, Nigeria
03. View My Work
A mix of security tooling, infrastructure, fintech, and product-focused applications reflecting how I think about systems, resilience, and user experience.
Featured Project · Lead Blockchain Engineer
A decentralized escrow and credentialing platform built on Base L2. It enables milestone-based USDC payments between clients and freelancers, with tamper-proof SoulBound Token (SBT) credentials and community-driven dispute resolution.
Featured Project · Lead Backend Engineer
Architected and developed a scalable fintech backend supporting multi-currency banking, virtual cards, savings groups, loans, and investments. Implemented secure transaction flows, automated savings (Osusu) systems, and advanced security features including RBAC, 2FA, and fraud detection.
Featured Project · Lead Full-Stack Engineer
Developed a full-stack real estate marketplace and social platform for rentals, sales, and shared apartments. Built a multi-role ecosystem with role-based access, listings, bookings, messaging, and community engagement features.
Featured Project · Lead Engineer
Engineered a comprehensive Content Security Policy (CSP) platform for XSS protection with real-time violation monitoring and AI-driven remediation. Integrated automated CSP generation tailored for Next.js applications.
Created an offline-first personal finance tracker emphasizing privacy and data security. Implemented robust client-side encryption ensuring all financial data remains local and inaccessible to external servers.
Lead Engineer
Developed a modern SaaS UI component library using Next.js 14, Tailwind CSS, and shadcn/ui. Delivered interactive features including live code previews, pre-built themes, and micro-animations for enhanced developer experience.
Lead Frontend Engineer
Built and maintained a lightweight load balancer in Go using a thread-safe round-robin algorithm for high availability and resilience.
Software Engineer & Maintainer
Developed a real-time messaging platform with an event-driven backend and monorepo architecture for end-to-end type safety.
Lead Full-Stack Engineer
04. Skills & Tools
Education & Awards
Ritman University, Akwa Ibom, Nigeria · GPA: 4.72
St. Aloysius Secondary School, Abuja
Ingressive for Good & Cisco — Completion of a 6-month cybersecurity bootcamp covering key security concepts and real-world knowledge.
Google — Expertise in threat detection, incident response, network security, and risk assessment.
CISCO — Structured career-path training covering SIEM monitoring, incident response workflows, vulnerability management, risk assessment, and foundational blue-team operations.
05. What's Next?
I'm always open to new opportunities, collaborations, and interesting security challenges. Whether you have a question or just want to say hi, my inbox is always open.