Executive Portfolio

Raiyan Ahmed Rahat

Product Architect & Cybersecurity Consultant

Founder & CEO at NexusCraft
Focus — |

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.

Raiyan Ahmed Rahat — Founder & CEO at NexusCraft
Founder & CEO NexusCraft

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

HTML
CSS
JavaScript
React
Python

Cybersecurity

Network Security
Endpoint Security
OSINT
Threat Management
Information Security

Tools & Environment

Git
GitHub
Linux
Kali Linux
Firebase

AI

AI Tools
Prompt Engineering

Certifications

Featured Projects & Ventures

Founder & CEO
Educational Technology Ecosystem

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.

ReactNode.jsTailwindCSSFirebaseEdTech
Security Platform
Secure Communication & Messaging Platform

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.

CryptographyWebSocketsZero-TrustNode.jsInfoSec
Active Architecture
Founded 2021

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 → Advanced

Product & UX Design

Figma · Motion Design · Design Systems

Beginner → Advanced

Applied AI & Machine Learning

Python · LLMs · Agents · Real-World Projects

Advanced

Admissions are open

All courses are 100% free for early learners until December 31, 2027. No card, no payment required.

Explore LearnEra

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.

Include country code for direct SMS notification (e.g. +880...)
Certificate Document
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