Caleb Kalejaiye

Software engineer

Hi there, I’m Caleb also known as Rapto. I’m a fullstack webengineer interested in building smooth and seamless web experiences. While I focus on the web, i’m also interested in the bigger picture of how app development works.

I enjoy building dev tools as there's something satisfying about making everyone's workflow smoother. Whenever I see a problem that could save another developer time or frustration, I try to build my solution into a tool.

On the side, i am also interested in ai/ml engineering. I try to learn more about the ai ecosystem and sometimes build small projects around it.

Work Experience

Frontend Engineer @ Buildorz

2025 — April 2026

Driving user engagement by building high-performance and interactive web experiences.

  • Architected and delivered high-performance websites, focusing on modular architecture and optimized rendering to ensure a seamless user experience.
  • Engineered complex, scroll-based interactive experiences using GSAP and Framer Motion, resulting in highly engaging and visually stunning user interfaces.
  • Collaborated with cross-functional teams to integrate complex APIs, ensuring data consistency and real-time responsiveness.

Fullstack Engineer @ Chimly

2021 — 2024

Solved complex business challenges through enterprise-grade full-stack solutions.

  • Led the development of scalable full-stack applications for enterprise clients, ensuring robust architecture and seamless system integration.
  • Streamlined data flow by designing and implementing high-performance RESTful APIs, reducing backend response latency and improving interoperability.
  • Optimized end-to-end performance by refining database queries and frontend delivery, successfully reducing application load times by 40%.

Some of my Works

Header.io

A banner creation tool, with built-in tools and powerful customization options i.e templates, a drag-and-drop drop zone, sticker kit, and quick generation for fast results.

  • Dashboard with project management
  • Drag & drop Drop Zone for fast composition
  • Sticker Kit & templates (100+ banners created)
  • Social integration to share banners
Blockgram

Blockgram ($BGRAM) is a blockchain-powered Telegram client that combines chat, crypto, and AI: send crypto in-chat, use an AI assistant and keyboard, and enjoy private, ad-free messaging.

  • Send & receive crypto in-chat
  • AI features: summaries, assistant, keyboard integrations
  • Written in TypeScript
  • Privacy-first: no ads or tracking
  • Open-source client with wallet capabilities
Numpay

I built the landing page for a platform that allows Seamless global money transfers using just a phone number.

  • Instant send/receive with smart wallet behind the scenes
  • Add money instantly and transfer globally
  • End-to-end encryption and transparent operations
Reputronics

I built an Autonomous Trust Layer that gives robots and AI secure digital identities, measurable reputation, and cryptographic proof of reliability, accountability, and skill.

  • Decentralized identities for robots and AI
  • Proof of Utility model for performance and safety
  • Reputation scoring based on verified actions
  • Tamper-proof digital passports
  • Modular co-chain architecture for data exchange

GitHub Contributions

 

Connect

You can contact me at here