Engineering Capabilities & Stack
A detailed breakdown of core software engineering domains, architectural practices, and production-proven technology tools.
Core Competencies
How I Solve Technical Challenges
Backend Engineering & Microservices
Building high-throughput, fault-tolerant backend applications
Designing robust RESTful APIs, asynchronous background jobs, and microservice architectures with C#/.NET Core and Python. Experienced in handling concurrent transactions, thread safety, rate limiting, and clean architectural patterns.
Key Engineering Outcomes:
FinTech & Payment Gateway Integrations
Connecting mobile money and banking cores securely
Specializing in real-time mobile money payment gateways (M-Pesa Daraja API), B2C/C2B payment callbacks, bank core transaction processing, and automated ledger reconciliation.
Key Engineering Outcomes:
Scalable Web Architecture & SSR
Delivering instant, accessible, high-conversion web frontends
Architecting modern web applications using Next.js 15, React, and Blazor with Server-Side Rendering (SSR) and Static Site Generation (SSG) for ultra-fast page loads and top-tier SEO performance.
Key Engineering Outcomes:
Database Architecture & Optimization
Structured relational data modeling and high-speed query tuning
Designing normalized relational schemas, index strategies, transaction isolation levels, and stored procedures across MySQL, PostgreSQL, SQL Server, and Oracle.
Key Engineering Outcomes:
Legacy System Modernization & Audits
Transforming technical debt into maintainable enterprise software
Auditing monolithic Python and .NET codebases to resolve memory leaks, fix security vulnerabilities, refactor tightly-coupled modules, and introduce automated CI/CD deployment pipelines.
Key Engineering Outcomes:
Data Pipelines & ETL Automation
Automating data extraction, transformations, and lead pipelines
Engineering custom Python automation scripts, Web scraping suites (BeautifulSoup, Selenium, Proxycurl API), and ETL pipelines that process unstructured data into clean structured databases.
Key Engineering Outcomes:
Technical Matrix
Categorized Technology Stack
Tools selected and deployed based on project requirements and engineering constraints.
- C# / .NET Core
- Python (Django / FastAPI)
- Blazor Web Server
- RESTful APIs & Webhooks
- Node.js / Express
- React.js
- Next.js 15 (App Router / SSR)
- TypeScript
- Tailwind CSS
- HTML5 / Modern JS (ES6+)
- SQL Server (MSSQL)
- PostgreSQL
- MySQL
- Oracle Database
- Entity Framework Core
- Microsoft Azure Cloud
- M-Pesa Mobile Money API
- Banking Core APIs
- Docker & Git CI/CD
- Proxycurl & ETL Tools
Need a Senior Engineer or System Architect?
Whether you need to hire a full-stack engineer for your core team or want to contract technical consulting for a business software solution, I offer end-to-end execution.