Kitwe, Zambia

Juma

Founder & Full-Stack Engineer

I build and ship real products from Kitwe, Zambia. Design through deployment.

See my workContact meRESUME.PDF
Juma Tandanya
About

Self-taught.
Multi-venture.
All real.

I'm a self-taught engineer and founder based in Kitwe, Zambia. Years of building, breaking, and shipping things that actually work.

I own products end-to-end: design through deployment. I've architected and built web platforms, serverless cloud infrastructure, native Android VPN tunneling, and mobile-money payment flows. Right now I'm operating MaterialCrate and building mobile for Trybe.

Projects

Things I've built.

MaterialCrate screenshot

MaterialCrate

Owner

The academic content platform where African students earn from sharing what they know.

Token-based creator economy with mobile money payouts, a custom plagiarism fingerprinting system (SHA-256 + MinHash/LSH), and free/pro/premium subscription tiers via Gumroad.

Next.jsPostgreSQLPrismaSupabaseRailwayVercelGumroadResend
Case study →Live site ↗
Supply Circuit screenshot

Supply Circuit

Client work

A full eCommerce platform on serverless AWS, built for a real Zambian business.

Complete Firebase-to-AWS migration: dual Cognito user pools, DynamoDB, Lambda, API Gateway, S3, SES, and WhatsApp order notifications. Delivered for SupplyCircuit Zambia Limited.

React 18TypeScriptViteDynamoDBCognitoLambdaAPI GatewayAmplify
Case study →Live site ↗
Trybe screenshot

Trybe

Contributor

An AI platform that matches people on who they are, not what they post.

Engineer on a team build. I wrote the entire Expo mobile app (auth stack, an eleven-screen onboarding flow, chat, threads, blind rooms), plus thread management on the Next.js client and fixes in the Python LangGraph agent layer. Rust services and a DeepSeek/Gemini agent stack underneath. Developed under Cracked Lemonade Stand.

React NativeExpoTypeScriptNext.jsPythonLangGraphRustPostgreSQL
Case study →Live site ↗
Hyperlink Software Technology LLC screenshot

Hyperlink Software Technology LLC

Client work

A corporate site built for an audience of one: the bank reviewing the company.

One self-contained HTML file, inline CSS, minimal vanilla JS, no build step, hosts anywhere. Built to read as legitimate under scrutiny: real scope, honest product status, bracketed placeholders instead of invented testimonials or logos.

HTMLCSSVanilla JSVercelGitHub Actions
Case study →Live site ↗
FinHive screenshot

FinHive

Design

Fintech UI designed to feel trustworthy, not terrifying.

Full UI/UX design in Figma: onboarding flow, data-dense financial screens with clear trust signals, and a navigation structure that keeps primary actions one tap away.

Figma
Case study →View Figma ↗
MagicVPN screenshot

MagicVPN

Client work

A commercial VPN built for mainland China, where the network actively fights back.

Solo-built, end-to-end: an Express/Postgres backend, a React Native client with a native Kotlin tunneling module (real packet-level VPN via sing-box, no wrapper, no webview), and a Next.js admin panel. Four evasion protocols, including VLESS+REALITY, to beat the Great Firewall. Android build complete and in device testing and production handover, with iOS to follow.

React NativeKotlinsing-boxNode.jsExpressPostgreSQLPrisma
Case study →
Stack

How I build things.

Frontend

ReactNext.jsTypeScriptViteTailwind CSSReact Three Fiber

Mobile

React NativeExpoexpo-routerKotlinAndroid VpnServiceMapLibreEAS Build

Backend

Node.jsExpressRustAxumPythonFastAPIPrisma ORMPostgreSQLPostGISDynamoDBRedisNeo4jQdrant

Cloud & Infra

AWS CognitoAWS LambdaAPI GatewayS3SESAmplify HostingSecrets ManagerSupabaseCloudflare R2DockerRailwayVercelFirebase

AI & Agents

LangGraphDeep AgentsMem0Vector embeddingsAI feature integration

Blockchain

SubstratePolkadot SDKFRAME palletsWebAssembly

Other

Gumroad subscriptionsMobile money integrationContent fingerprintingVPN protocols & evasionResend
Testimonial

Working with Juma on Supply Circuit was exactly what we needed. He understood the business requirements, made smart technical decisions, and shipped a production-ready platform. The AWS migration was smooth and the system has been reliable since day one.

Marvelous Chikombola

SupplyCircuit Zambia Limited

Contact

Let's build something.

Got a project, collab idea, or just want to say hi? My inbox is open.

→itsjumah.tj@gmail.com
GitHubLinkedInX / TwitterWhatsApp
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