API Integration & Software Reliability Specialist

I help businesses investigate unreliable APIs and critical software workflows, with clear priorities for what to fix first. I'm Ivan Lim, a software engineering and API integration specialist with 20 years of experience across software development, IT leadership, enterprise integrations, and production support. My technical background includes APIs, Apigee, Node.js, TypeScript, PostgreSQL, cloud services, and troubleshooting. My focused assessments support technical leaders and operations stakeholders in e-commerce businesses, SaaS companies, and teams operating connected business systems. Typical concerns include failed data transfers, incorrect calculations, inconsistent updates, slow workflows, and usability obstacles. • API Integration Health Check — assess one agreed integration workflow, such as order synchronization, payment-status updates, delivery-provider connections, or accounting handoffs. • Software Codebase Health Check — review one agreed workflow, feature, or component across related files for reliability and maintainability, including AI-generated code. • SQL Query Optimization & Performance Health Check — investigate one critical query or tightly related query workflow supporting searches, dashboards, or operational reports. • UX Heuristic Evaluation & Usability Health Check — evaluate one agreed customer or staff journey within the listing's screen and device limits. I confirm scope, required evidence, price, and timeline before beginning. You receive a professional PDF report with evidence-supported findings, prioritized risks, limitations, and practical recommendations. One clarification round is included. These are focused assessments. Code fixes, deployment, ongoing monitoring, and comprehensive security testing are outside the standard scope; implementation can be discussed separately.