Valentin Rodriguez

Backend Software Engineer

1+ yrs exp 83 · Excellent

About

Backend Software Engineer focused on designing scalable RESTful APIs, application security, and financial business process automation. Strong analytical foundation with hands-on experience in layered architectures, relational data persistence, and automated unit testing. Proven ability in resolving complex bugs and collaborating effectively within cross-functional Agile/Scrum environments.

Skills & Expertise (23)

Java 21 Intermediate

7.5/10

Years Exp

Spring Boot 3 Intermediate

7.5/10

Years Exp

JUnit 5 Intermediate

7.5/10

Years Exp

Mockito Intermediate

7.5/10

Years Exp

Java Intermediate

7.5/10

Years Exp

RESTful APIs Intermediate

7.4/10

Years Exp

Spring Scheduling Intermediate

7.4/10

Years Exp

Postgresql Intermediate

7.0/10

Years Exp

JWT Intermediate

7.0/10

Years Exp

OAuth2 Intermediate

7.0/10

Years Exp

Application Security Intermediate

6.5/10

Years Exp

Spring Data JPA Intermediate

6.5/10

Years Exp

kotlin Intermediate

6.5/10

Years Exp

Scrum Intermediate

6.5/10

Years Exp

Agile Intermediate

6.5/10

Years Exp

Hibernate Intermediate

6.5/10

Years Exp

Spring AOP Intermediate

6.5/10

Years Exp

Gradle Intermediate

6.0/10

Years Exp

GraphQL Intermediate

6.0/10

Years Exp

Apollo Client Intermediate

6.0/10

Years Exp

MySql Intermediate

6.0/10

Years Exp

JavaFX Intermediate

5.5/10

Years Exp

iTextPDF Intermediate

5.5/10

Years Exp

Work Experience

Backend Developer / Tech Lead

Zenitha IT (Aediflow SaaS Product Development)

Jan 2026 - Present

Automated complex financial calculations and settlement workflows, achieving 99.9% consistency in daily reporting via scheduled background tasks using Spring Scheduling in Java 21 and PostgreSQL. Optimized multi-tenant data isolation across organizations by enhancing core logic with Spring AOP and Hibernate dynamic filters. Implemented a robust authentication and authorization architecture integrating JWT and OAuth2 for secure API access control. Ensured high reliability and test coverage of mission-critical services prior to deployment by designing unit test suites with JUnit 5 and Mockito. Accelerated team delivery velocity across weekly sprints and mitigated technical blockers through active participation in daily Scrum ceremonies.

Java / Android Developer

Sugar Coach

May 2025 - Dec 2025

Modernized legacy codebase by upgrading core dependencies from 2019 to 2025 standards, resolving breaking changes and improving dependency management and security in Gradle. Reduced production software bug resolution time by 40% through systematic investigation, root-cause analysis, and bug fixing within an MVP architecture using Java and Kotlin. Ensured high availability and persistence of sensitive user data in offline scenarios by architecting an Offline-First strategy using Room (SQL) as the single source of truth. Integrated remote services and streamlined data synchronization by consuming GraphQL endpoints via Apollo Client.

Computer Science Instructor

ICT Workshop

Jan 2025 - Jun 2025

Guided 90% of a cohort of 80+ students with diverse skill levels to successfully deliver functional final software projects by designing and delivering a structured curriculum in Java and Object-Oriented Programming.