Steve Arnold Otieno

Full-Stack Software Engineer & Solutions Architect

Based in Kenya (Serving Global Markets)

Open to High-Impact Freelance Projects & Full-Time Roles

99.8%

(M-Pesa & Global Card Success)

45%

Faster load times = Better SEO)

30%

(Turning visitors into customers)

95%

Data Isolation (Bank-grade protection)

Connect

The Engineer

I am a Software Engineer who builds for growth. I bridge the gap between complex technical architecture and practical business needs. Whether I am crafting a sleek corporate website for a local brand or engineering a multi-tenant SaaS platform for a global startup, my focus remains the same: System Integrity.

I believe that a digital product is only as good as its foundation. My work is secure by design, optimized for search engines (SEO), and engineered to scale as your business grows. I build software that businesses can rely on 24/7.

Professional Journey

Full Stack Software Engineer

iTravel Holidays (UK-based)

March 2024 - Present

Platform Engineering: Collaborated with senior engineers to refactor legacy codebases, optimizing RESTful API endpoints and contributing to a 30% improvement in conversion rates.
Fintech Integration: Engineered a fault-tolerant Stripe payment gateway with webhook handlers, ensuring a 99.8% transaction success rate.
System Architecture: Independently designed a secure, multi-tenant invoice module with strict database isolation, reducing cross-tenant risks by 95%.
Performance: Identified and resolved N+1 query issues, reducing API response times by 45%.
Agile Leadership: Championed code quality through peer reviews and actively improved team deployment velocity.

Node.jsNestJSReactMySQLPostgreSQLMongoDBRedisDocker

Technical Arsenal

Frontend

Next.jsReactTypeScriptTailwind CSSshadcn/uiMantine UIReduxReact Query

Backend

Node.js (NestJS, Express.js)TypeScriptPHP (Laravel, CodeIgniter)Python (Django)Java (Core)Rust

Databases

PostgreSQLMySQLMongoDBPrisma ORMTypeORMRedis (Caching & Queues)Supabase

Integrations

StripeM-Pesa APIPayPalTwilioResendSendGridWebhooks

Infrastructure

DockerAWSVercelRenderRailwayCI/CD (GitHub Actions)Linux/UnixSecurity Auditing (OWASP)

Architecture

Multi-tenancyEvent-Driven ArchitectureACID CompliancePBAC/RBACMicroservices

Methodologies & Tools

Agile/ScrumSystem DesignTDDAI-Assisted Development (Cursor/Claude/Kiro)

Education & Foundation

Bachelor of Science (B.Sc.) - Computer Science

2020 - 2024

Technical University of Mombasa (TUM)

Capstone Project: Multi-Tenant Invoice Management System

For my final project, I architected a secure invoicing system for multiple businesses. This project set the foundation for my career, teaching me how to enforce strict data privacy and security—skills I now use to build professional-grade software for clients worldwide.