Diego De Oliveira

Staff Software Engineer with 13 years of experience specializing in the evolution of product-critical systems. Partnering remotely with US companies since 2020, I drive technical strategies that ensures the reliability, maintainability, and long-term operability of backend domains that directly support business growth. I operate at the intersection of architecture and execution. My approach is intentionally hands-on, validating architectural decisions through implementation and supported in production to ensure system changes translate into real operational stability. I specialize in guiding systems through structural transitions as they scale, often collaborating within a group of senior peers to navigate complex trade-offs and reach architectural consensus that aligns technical direction with business needs. In practice, this has included leading the transition of fragmented services into a modular monolith to eliminate coordinated deployments and cross-team friction, resolving critical Postgres bottlenecks that reduced complex query response times from seconds to milliseconds, and introducing layered feature-slice architectures with automated integration testing to improve maintainability and prevent regressions as systems scaled. This work helps prevent structural constraints from slowing delivery as systems grow. While backend ownership is my primary focus, I contribute across the stack, from React-based interfaces to infrastructure decisions, to keep systems cohesive from development through production. I have worked remotely with US companies since 2020 and am comfortable operating in async-first environments. I am interested in roles involving deep ownership of product-critical systems where architectural direction is carried through hands-on implementation.