Freelancer profile translated to English.
Back to original languageAbout Natalia
Senior Backend Software Engineer (Java/Spring) with experience in transactional systems and critical environments. I design and implement REST APIs, integrations, and persistence layers with a focus on stability, security, traceability, and performance. I work with SQL optimization (Oracle/PostgreSQL; MyBatis/JPA), incremental refactoring to reduce technical debt (Sonar quality, complexity, duplication), and milestone delivery with PRs, tests, and technical documentation.
What I do:
Backend Development: services, REST APIs, contracts, validations, errors, observability (logs/audits).
Integrations: flow orchestration, third-party, resilience (timeouts/retries), consistency.
Persistence/SQL: queries and indexes, before/after measurement, DB layer tuning.
Quality: metrics-driven refactoring, design patterns, error handling standardization.
Spanish
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- EFT Group / EvertecSoftware Engineer SpecialistBANKING AND INSURANCEOctober 2007 - September 2025 (17 years and 11 months)ChileDevelopment and evolution of critical backend components in transactional environments, ensuring operational continuity, stability, security, and traceability.Java Backend (Spring): development and maintenance of REST services/APIs, validations, contracts, error handling, and operational logging.Integrations and legacy communication: evolution of APIs integrating with legacy queues/messaging, strengthening reliability (timeouts, retries/failure control, consistency).Persistence and performance: intensive work with Oracle/PostgreSQL; optimization of queries and indexes with before/after measurement.MyBatis (usual) / JPA-Hibernate (depending on project): design and tuning of the data access layer.Edge cases and continuous improvement: analysis and correction of complex incidents (e.g., session duplication, component communication failures) and incremental refactoring to reduce technical debt and complexity.Observability and MTTR reduction: improvements in traces and logging to accelerate diagnostics and stabilize production.
- Consultora SATXSenior Software Engineer (Staff Augmentation)BANKING AND INSURANCEJanuary 2026 - Today (5 months)Santiago de Chile, ChileDevelopment and evolution of backend services and business components for transactional systems, focusing on stability, performance, and quality.Design and implementation of REST APIs with clear contracts, validations, traceability (logging), and standardized error handling.Modeling of process flows and states (e.g., operation creation/tracking, entity management, audit/history), integrating authentication and access control where applicable.Incremental refactoring to reduce technical debt: decreasing complexity, eliminating duplication, improving maintainability, and adhering to quality rules.Performance optimization, especially in the data layer (SQL/persistence): query tuning, index/access strategy, and validation with before/after measurement.Delivery of end-to-end functional demos (backend + UI) to showcase complete flows, key screens, and user experience.Documentation and handover: technical guides, architectural decisions, prioritized backlog, and support for internal teams.
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Education
- Computer EngineeringDuocUC2013Ingeniería en Informática
- Bachelor of Science in PhysicsUniversidad de La Frontera2005Licenciatura en Física