Summary: Seeking a Backend Engineer to architect and optimize a high-performance transaction orchestration engine for a leading digital remittance platform, focusing on scalability and ledger accuracy. Highlights: 1. Opportunity to define architectural legacy for a major payment platform 2. Culture valuing "Doing it Right" over "Doing it Fast" 3. Push PHP 8.4 to its absolute limits **Project:** MonidaOS v3\.1 (Fortress Release) **Product:** Enterprise\-grade remittance orchestration platform. **Strategy:** "Quality Fortress" (Automated Governance, Zero\-Trust, Scalability). **Location:** Mexico City (Remote) ***Mission:*** Engineer the high\-performance heart of MonidaOS, building a provider\-agnostic transaction engine capable of handling exponential growth while maintaining absolute ledger accuracy. ***Challenge Context:*** You will tackle the challenge of "Performance at Scale" without sacrificing strictness. Your primary focus is optimizing our transaction processing pipeline to handle 500\+ TPS using Laravel Octane, while ensuring our "Quality Fortress" rules (immutable DTOs, strict types) are never bypassed for speed. ***Key Responsibilities:*** * Core Engine: Architect and optimize the transaction orchestration engine to support dynamic routing across multiple remittance providers. * High Performance: Implement and tune Laravel Octane (Swoole/RoadRunner) for high\-throughput endpoints. * Database Optimization: Design eficient schemas in MariaDB; implement heavy caching strategies using Redis for non\-transactional data. * Governance Code: Write custom PHPStan rules or architecture tests (Pest) to prevent architectural drift (e.g., ensuring Controllers never talk directly to Models). * Concurrency: manage race conditions and idempotent processing for distributed payment webhooks. * Infrastructure: Assist in managing AWS Graviton instances via Terraform for cost\-effective scaling. ***Tech Stack \& Tools:*** * Must Have: PHP 8\.4 (Attributes, JIT), Laravel 12\. * Must Have: Laravel Octane, Redis (advanced caching/queues). * Must Have: PestPHP (Architecture Testing), Larastan. * Nice to Have: Go or Rust (for specific microservices), AWS Terraform. ***Required Experience \& Skills:*** * 5\+ years specializing in backend development with PHP/Laravel. * Deep knowledge of Database design (indexing, partitioning, locking strategies). * Experience with Event\-Driven Architectures (RabbitMQ, Kafka, or SQS). * Required English proficiency B2\. **Soft Skill:** "Performance Paranoia"\-you obsess over millisecond latencies and memory leaks. ***What We Offer:*** * A sandbox to push PHP 8\.4 to its absolute limits. * The opportunity to define the architectural legacy of a major regional payment platform. * A culture that values "Doing it Right" over "Doing it Fast". ***About Us:*** Monida is a digital remittance platform based in the USA focused on making international money transfers simple, fast, and affordable. We enable people in the United States to send money to Mexico, Guatemala, and other countries with zero fees and competitive exchange rates, including cash\-to\-cash transfers from physical locations. Our mission is to remove friction from cross\-border payments and make moving money as easy and transparent as possible. ***Location:*** This will be a fully remote position from within Mexico City ONLY. Important hiring note: **DO NOT** apply if you are not a citizen of Mexico, **currently living in Mexico City.** This is a region\-specific role. Job Types: Full\-time, Permanent Pay: $45,000\.00 \- $60,000\.00 per month Work Location: Remote