Hey,
I'm Hersi.

A software engineer who builds infrastructure and SaaS products.

GoAWSTypeScriptNext.jsInfrastructure

I build infrastructure tools and SaaS products for businesses. Currently shipping PesaStream and open-source infra with Go and AWS. Based in Nairobi.

Featured projectsContact MePhotography
View_CV
SYSTEM STATUS
ONLINE

Building

PesaStream

Focus

Payments

Status

Shipping

Base

Nairobi

System Intelligence

Identity Architecture

Experience our customizable, high-fidelity digital business cards. Designed for the modern era of networking with real-time editing and premium aesthetics.

Customize YoursLive Demo
Yussuf HersiSoftware EngineerBuilding payment infrastructure for African SMEs✦ PesaStream✉yussuf@hersi.dev📱+254 712345678⚙github.com/aynaash
FRONT SIDE
hersi.dev

✨ Scan to Connect ✨

Scan QR Code to Visit Website

BACK SIDE
Click to flip • Hover to tilt
SYSTEM_STATUS: OPERATIONAL

Visual Narrative

A curated archive exploring the tension between structured architecture and organic form.

Explore Gallery

By the Numbers

What I've been building.

5+
Products Shipped

SaaS, open-source, and client work

3
Active Projects

PesaStream, OpenClaw, NextDeploy

4+
Open Source Tools

Go, TypeScript, and Bun libraries

Nairobi
Based In

Building for African markets

What I Work On

Focus Areas

The problems I spend my time solving — payments, automation, and tools for African businesses.

Go & AWS Infrastructure

Building deployment tools, CLIs, and cloud infrastructure with Go. Direct AWS SDK provisioning — Lambda, CloudFront, S3, SQS.

Go CLI tooling
AWS SDK provisioning
Lambda & CloudFront
Infrastructure as code

B2B & B2C SaaS

End-to-end SaaS products — payment systems, business tools, and platforms built for real customers.

Paystack & M-Pesa
WhatsApp Business API
Admin dashboards
Multi-tenant systems

AI Automation

Practical AI agents for business operations — customer comms, social media, and approvals, all gated through WhatsApp.

Claude API integration
Approval-gated agents
Feedback loops
Content generation

Backend Systems

API design, database architecture, and backend services in Go and TypeScript. Drizzle ORM, NeonDB, and PostgreSQL.

API design
Drizzle ORM & NeonDB
Go services
Data modeling

Building for Africa

Shipping products for African markets — local payment rails, offline-first design, and mobile constraints.

Local payment integration
Offline-first PWA
Mobile-first UX
Building in public
Explore all articles
Featured Work

Recent Projects

A selection of things I've built, from web apps to developer tools.

PesaStream

A WhatsApp-first business operating system for African SMEs. Point-of-sale, admin dashboards, and AI agents — run a full business from a single chat thread.

Next.jsTypeScriptDrizzle ORMPaystackWhatsApp API

type

SaaS

market

Africa

OpenClaw

An autonomous AI agent layer that handles customer comms, feedback loops, social media, and ad operations — all approval-gated through WhatsApp.

TypeScriptClaude APIWhatsApp APIBun

type

AI Agents

status

Shipping

NextDeploy

Open-source Go CLI that deploys Next.js apps to AWS using direct SDK provisioning — Lambda, CloudFront, S3, SQS. No Terraform or CDK required.

GoAWS SDKLambdaCloudFront

type

Open Source

infra

AWS

Wasiliano

Minimal, SMTP-first email library for Bun and Next.js. Built for transactional emails and newsletters with Notion as a CMS.

BunNext.jsSMTPNotion API

deliverability

High

overhead

Minimal

ContextBytes

AI-powered content system that transforms passive content into active mastery using hybrid retrieval and reasoning loops.

Gemini 1.5 ProNeo4jVertex AIPython

type

AI Tool

retrieval

Hybrid

View all projects