Job Title

Total AI Systems, Inc. is building AI-powered SaaS infrastructure for enterprise debt recovery. We operate in a fast-moving, production-driven environment where engineers are accountable for what they ship.We are not hiring someone who just “writes code.”We are hiring someone who understands systems, data, reliability and ownership.This role is backend-heavy and PHP-focused. You will design, build, secure and scale production systems that power real financial workflows.If you care about clean architecture, structured logic and shipping stable systems used by enterprises — this role is for you.What You’ll Be Responsible ForDesigning and building scalable backend services using PHPDesigning clean, normalized, maintainable MySQL data modelsBuilding secure, well-structured REST APIsRefactoring legacy logic into modular, testable componentsIntegrating third-party APIs and payment gateways safely and reliablyImproving performance of queries and backend processingHandling edge cases in compliance-driven financial workflowsWriting clear technical documentation and API specsPartnering with product and frontend teams to ship production-ready featuresOwning bugs in production, investigating root cause, not patching symptomsContributing to backend architecture decisions and scalability planningMaintaining clean Git workflows and code quality standardsRequired QualificationsBachelor’s degree from an accredited college or university (or equivalent experience)3+ years of backend development experienceStrong proficiency in PHP and MySQLDeep understanding of MVC architecture and API-driven backend designExperience designing secure authentication and authorization systemsExperience integrating third-party APIs and payment gatewaysStrong debugging and performance optimization skillsExperience working in SaaS or product-based environmentsAbility and willingness to work US business hours when neededFluent spoken and written EnglishHigh ownership mindset — you do not wait to be told to fix problemsStrongly PreferredExperience in FinTech or compliance-driven systemsExperience working in multi-tenant SaaS architectureExperience refactoring legacy PHP systemsUnderstanding of system performance tuning and query optimizationBasic working knowledge of HTML, CSS, and JavaScriptWhat We Mean by “Backend Ownership”We are looking for someone who:Understands database tradeoffs before writing queriesThinks about data integrity before writing featuresDoes not expose insecure endpoints “just for now”Optimizes bottlenecks before users complainTreats production bugs as personal responsibility