Raiyan Ahmed Rahat
Product Architect & Cybersecurity Consultant
I engineer scalable, secure digital infrastructure and AI-driven web applications. As the Founder & CEO of NexusCraft, I bridge complex product architecture with zero-trust security and modern automation.
About Me
I'm Raiyan Ahmed Rahat, a self-taught developer and cybersecurity enthusiast based in Gazipur, Bangladesh. My path in technology has been defined by curiosity, persistence, and continuous hands-on learning rather than a traditional academic route. While pursuing my Dakhil equivalent secondary education, I have focused on mastering software development and security fundamentals.
As a freelance web developer, I have built, deployed, and maintained more than 30 live web projects, including educational, media, and business applications. My core development stack includes HTML, CSS, JavaScript, React, and Firebase. I emphasize efficient, modern development workflows, utilizing Git, GitHub, and AI-assisted tools to streamline implementation.
Beyond development, I spent nearly two years working remotely as a Junior Cyber Security Consultant for ALTEN Germany. In this role, I collaborated with international teams to conduct research on emerging threats, assist with security assessments, and compile technical documentation. I have also earned 14 certifications from Cisco Networking Academy, Qualys, and Saylor Academy spanning network defense, endpoint security, Python, vulnerability management, and AI.
My goal is to continue growing as a technology professional, creating secure, high-performing web applications. What motivates me is the challenge of building user-friendly frontends while ensuring the underlying systems are structurally secure. Working with me means bringing someone onto your team who is self-directed, adapts quickly, and approaches development with a security-first mindset.
30+
Projects
12+
Certifications
Cybersecurity
Focus
AI & Software
Engineering
My Skills
Programming
Cybersecurity
Tools & Environment
AI
Certifications
Featured Projects & Ventures
NexusCraft
Premier digital agency and enterprise web engineering firm. Specializing in high-performance digital infrastructure, scalable web architecture, AI agent systems, and zero-trust security implementations for global clients.
LearnEra Bangladesh
An online learning platform offering practical, project-based courses for students. Evolved from an online study group established in 2021 with tracks in Full-Stack Web Engineering, Product & UX Design, and Applied AI & Machine Learning. 100% free until December 31, 2027.
Hallowin
Next-generation secure communication platform engineered with end-to-end cryptographic protocols, ephemeral session management, and zero-knowledge data architecture for mission-critical collaboration and privacy.
LearnEra — Founding Vision
Built in Bangladesh. For Bangladesh.
How It Started
LearnEra didn't start as a product — it started as a question: why does quality tech education cost so much in Bangladesh? In 2021, a small group of friends began meeting in an online study group, sharing resources and discussing ideas about how education actually works. That conversation grew into a commitment to build something real.
Today, LearnEra is a fully built, free-access online learning platform — designed from the ground up to give every Bangladeshi student a genuine shot at in-demand, job-ready skills, regardless of their financial situation.
"We'd rather prove our value first. Every course is free until December 31, 2027 — no hidden fees, no payment required."
The Mission
Make practical, project-based learning accessible to every Bangladeshi student — building real skills that employers and clients actually want, without a price tag as a barrier.
LearnEra Labs
A long-term R&D roadmap exploring localized AI tooling and shared learning infrastructure for Bangladeshi developers — open, community-driven, and built to last beyond the free period.
Verifiable Outcomes
Every completed course earns a free, verifiable certificate — permanently issued to the learner even after the free access window ends in 2027.
Three Learning Tracks
Full-Stack Web Engineering
React · Node.js · TanStack · Cloud Deployment
Intermediate → AdvancedProduct & UX Design
Figma · Motion Design · Design Systems
Beginner → AdvancedApplied AI & Machine Learning
Python · LLMs · Agents · Real-World Projects
AdvancedAdmissions are open
All courses are 100% free for early learners until December 31, 2027. No card, no payment required.
Experience
Freelance Web Developer
13/09/2023 - Present | Gazipur District, Bangladesh
- Developed and deployed more than 30 live websites and web applications.
- Managed hosting, deployment, maintenance, and troubleshooting.
- Built educational, media, and business-related web projects.
- Utilised AI-assisted development workflows and modern web technologies.
Junior Cyber Security Consultant
14/03/2024 - 08/02/2026 | ALTEN Germany (Remote)
- Assisted senior cybersecurity professionals in project-related activities.
- Supported cybersecurity research, analysis, and technical documentation.
- Conducted information gathering and research on cybersecurity topics and emerging threats.
- Assisted in preparing reports and maintaining project documentation.
Get In Touch
Contact Information
Feel free to reach out to me for any opportunities or collaborations.