Bitwalka
Technological Solutions

Building software that solves real problems

Mobile apps, browser extensions, blockchain smart contracts, and full-stack solutions - plus developer courses to share what we've learned along the way.

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Bitwalka

Products & development, built to deliver.

We design and develop mobile apps, browser extensions, blockchain smart contracts, and custom software solutions. When we solve interesting problems, we turn that knowledge into courses so other developers can level up too.

Products

What We've Built

Polished apps designed to solve everyday problems.

Chrome Extension

WebNotes - Contextual Notetaker

Save notes tied to specific websites. Syncs across devices, supports import/export, and keeps your web research organized.

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Android App

NexaCalc - All-in-One Calculator Suite

Percentage, financial & big-number calculators, comprehensive unit converters, time zone tools, calendar conversions, favorites, and theming - all in one polished app.

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Web App

Family Heritage - Digital Family Book

Record every family member across generations with bios, relationships, and a visual family tree - your complete family history in one app.

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Courses

We also teach what we know. Master blockchain development from your first smart contract to production DApps through hands-on Udemy courses.

Beginner

Solidity Essentials: Master Smart Contract Development

The ideal starting point for blockchain development. Build your first Solidity smart contracts from scratch — for beginners and experienced programmers alike.

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Advanced

Advanced Solidity & Smart Contract Security

Production-grade Solidity. Deep-dive into gas optimization, reentrancy guards, access patterns, and critical security practices.

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Full Stack

DApp Mastery: Solidity, Frontend & Web3

Build full decentralized applications end-to-end. Connect smart contracts to React frontends with Web3.js and ethers.js.

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Let's work together

Got an idea, a question, or want to collaborate? We'd love to hear from you.