I am a backend engineer with CTO-level experience who specializes in building bulletproof, high-load systems that do not buckle under pressure. I thrive on solving complex technical bottlenecks, migrating massive legacy codebases, and designing event-driven architectures that handle real-world traffic.
- High-Traffic Architectures: Designing microservices and distributed systems capable of handling millions of requests and massive concurrent live user loads.
- Financial & Transactional Engines: Building ultra-reliable financial modules (savings, commercial papers, wallets) using Event-Driven Architecture.
- Backend Mastery: Deep expertise in PHP 8+, custom Laravel frameworks, Filament, NestJS, and optimizing databases for massive datasets.
- Performance Optimization: Upgrading enterprise systems (like a 200k+ line PHP migration) to slash API response times and infrastructure costs.
Core Backend & Frameworks
Data, Caching & Queues
Infrastructure & Cloud
Frontend & Full-Stack
- Built enterprise financial engines at Ladda, deploying robust modules for KYC, Treasury Bills, and Wallets that improved processing efficiency by 30%.
- Scaled B2B infrastructure at commercetools, upgrading legacy systems to drop API response times by 30% and implementing OpenTelemetry tracing.
- Migrated 200,000+ lines of legacy code from PHP 5.6 to 8.0, resulting in a direct 40% performance increase.
- Maintained 300,000+ active user platforms utilizing Docker, MongoDB, and Laravel.
"I build productive software, not proof-of-concepts."
- LinkedIn: linkedin.com/in/ahless
- Email: alexandergaruba96@gmail.com