ENGINEERING PROOF

Working Software, Not Capability Claims

These projects show the APIs, business rules, test paths, deployment workflows and operational controls behind the services ClearClients offers.

Discuss Your Project

FINTECH / PAYMENTS

M-Pesa Payment Gateway

Production-structured M-Pesa payment service covering STK Push initiation, asynchronous callbacks, transaction states, retries, refunds, analytics and transaction event tracking.

PROBLEM

Businesses need a reliable way to initiate M-Pesa payments and reconcile asynchronous transaction confirmations without fragile manual checks.

SOLUTION

A FastAPI payment service manages STK Push requests, callbacks, transaction states, retries, refunds and operational tracking as one workflow.

PROOF

✓ Live application✓ Swagger API documentation✓ Callback and webhook flow✓ Docker and GitHub Actions delivery

PythonFastAPIDockerGitHub ActionsRender

Live Application API Documentation GitHub Source

FINTECH / BANKING

Bank Transaction API

Full-stack banking application demonstrating REST API engineering, JWT authentication, account operations, transfers, transaction history, automated testing and cloud deployment.

PROBLEM

Financial applications need protected account and transaction APIs with enforceable ownership, balance and transfer rules.

SOLUTION

A FastAPI service and browser dashboard provide JWT authentication, account management, deposits, withdrawals, transfers and audit-friendly transaction history.

PROOF

✓ Live authenticated dashboard✓ Interactive Swagger API✓ Automated API tests✓ Docker build and live smoke checks

PythonFastAPIJWTSQLAlchemyDockerGitHub Actions

Live Application API Documentation GitHub Source

FINTECH / PAYROLL

KenPay, Kenyan Payroll System

Full-stack Kenyan payroll application calculating PAYE, NSSF, SHIF, Affordable Housing Levy, net salary and employer cost through a web application and REST API.

PROBLEM

Payroll teams need repeatable statutory calculations and clear payroll outputs without spreadsheet-driven errors and duplicated work.

SOLUTION

A web application and REST API calculate Kenyan payroll deductions, net salary and employer cost through validated payroll logic.

PROOF

✓ Live web application✓ REST API✓ Statutory calculation engine✓ Docker and GitHub Actions workflow

PythonFastAPIPydanticDockerGitHub Actions

Live Application GitHub Source

MORE ENGINEERING WORK

Additional Projects

Supporting work across full-stack payment interfaces and machine learning.

FULL STACK / PAYMENTS

M-Pesa Payment Gateway Demo

React and FastAPI payment interface demonstrating payment initiation, transaction state management, webhook verification and frontend-to-backend API integration.

ReactTypeScriptFastAPIREST APIsWebhooks

GitHub Source ↗

AI / MACHINE LEARNING

ML on Graphs

Machine-learning project covering graph analysis, Graph Neural Networks, link prediction, edge classification, community detection, graph-level learning and model explainability.

PythonMachine LearningGraph Neural NetworksJupyter

GitHub Source ↗

Need Similar Engineering for Your Product?

Bring the payment flow, API requirement, backend problem or cloud workload.

Discuss Your Project