Steve.Architect
Available for Hire

Building Secure, Multi-Tenant SaaS Platforms

I am a Backend-Focused Full Stack Engineer bridging the gap between legacy reliability (PHP) and modern scalability (Node.js/NestJS). Specialized in Event-Driven Architecture and Fintech Integrations.

Connect:
Steve Arnold Otieno

About Me

Systems Architect & Backend Specialist

I am a software engineer who values data integrity over hype. While I build clean UIs, my true strength lies in architecting backend systems that handle money and data correctly.

With a background in Computer Science, I bridge the gap between legacy reliability (PHP) and modern scalability (NestJS). I specialize in building multi-tenant SaaS platforms where security and isolation are non-negotiable.

Multi-Tenant Architecture
Event-Driven Systems
Fintech & Ledgers
99.8% Payment Success Rate
Read My Story

Core Competencies

I move beyond simple CRUD applications to build systems that are secure, reliable, and scalable by design.

SaaS Platform Architecture
Designing secure, multi-tenant architectures that scale. I specialize in data isolation strategies (Row-Level Security) and schema design.
Deep Dive
Fintech & Ledger Systems
Engineering immutable, double-entry financial ledgers. I build systems that handle money with ACID compliance and 99.8% transaction reliability.
Deep Dive
Event-Driven Systems
Decoupling complex business logic using Pub/Sub patterns. I ensure heavy background tasks don't slow down the user experience.
Deep Dive
High-Performance APIs
Optimizing database queries and API endpoints. I use Redis caching and proper indexing to reduce latency by up to 45%.
Deep Dive

Featured Engineering

A selection of complex systems I have architected. I focus on solving real-world problems with robust, scalable code.

GradeHub - Enterprise SaaS Platform
GradeHub - Enterprise SaaS Platform
A production-grade, multi-tenant School Management System featuring event-driven architecture, immutable financial ledgers, and RBAC security.
NestJSPostgreSQLEvent-DrivenDocker
Case Study
iTravel - High-Availability Payment System
iTravel - High-Availability Payment System
Architectural case study of a high-traffic booking engine. Engineered a fault-tolerant payment layer achieving 99.8% transaction success rates.
Node.jsStripe APIMicroservicesRedis
Case Study
ArtisanBase - Headless E-Commerce
ArtisanBase - Headless E-Commerce
A scalable, headless e-commerce solution decoupled into a NestJS backend and Next.js frontend, featuring Redis caching for high performance.
NestJSNext.jsTypeScriptSupabase
Case Study
Legacy Library Management System
Legacy Library Management System
A foundational LAMP stack system handling 10,000+ records. Features custom session management and role-based access control without frameworks.
PHPMySQLLegacy SystemMVC Pattern
Case Study

Ready to Engineer Your Next Solution?

I am currently open to Full-Time Software Engineering roles. Whether you have a question about my architecture or want to discuss a potential fit, I'd love to hear from you.

stevearnold9e@gmail.com