Senior Java Software Engineer (Oracle) - OP02295

Dev.Pro; São Paulo; Remote; BRL 180,000 - 240,000; Full time

Job summary

Dev.Pro, a US-based outsourced software development company, is hiring for a Senior Java Software Engineer with strong Oracle expertise to join a large-scale platform modernization initiative. You will design the Oracle database schema, support a future MySQL-to-Oracle migration, and blend hands-on Java development with advanced database engineering.

You’ll work with cross-functional teams across production environments, ensuring high performance, reliability, and scalable backend systems.

Qualifications

• 5+ years of experience building, debugging, and optimizing scalable Java backend applications.
• Strong proficiency in Java 8–17, OO design, patterns, multithreading and concurrency.
• Hands-on Oracle development experience in production, with knowledge of indexing, query optimization, partitioning, replication.

Responsibilities

• Design, develop, and maintain scalable Java backend applications.
• Design the Oracle database storage schema for a new application.
• Support the planning and execution of a future MySQL-to-Oracle migration.
• Develop and optimize SQL queries to improve database performance.
• Troubleshoot complex application and database issues in production environments.
• Support production database operations and implement changes with minimal downtime.
• Write and maintain unit tests using JUnit and Mockito.
• Collaborate with cross-functional teams on design and implementation decisions.
• Create and maintain technical documentation for relevant project activities.

Skills

Java

Oracle DB

SQL

JUnit

Mockito

GCP

Kubernetes

Linux scripting

Bash

Python

English

Scrum

Communication

Multithreading

Tools

Gradle

CI/CD

Job description

We are hiring in Latin America! At Dev.Pro, a US-based outsourced software development company, we're looking for contractors to join our global team of IT professionals helping tech companies scale their business through software engineering expertise. Operating as a remote-first company, our experts work across 55+ countries on five continents, giving us the flexibility and skillset to deliver high-quality engineering for projects of any size or complexity.

We invite a Senior Java Software Engineer with strong Oracle expertise to join a large-scale platform modernization initiative. You’ll work on a project that involves consolidating multiple platforms around Oracle, designing the database schema for a new application, and supporting a future MySQL-to-Oracle migration. In this role, you'll combine hands-on Java development with advanced database engineering and collaborate with cross-functional teams to deliver reliable solutions.

What's in it for you:

• Contribute to a large-scale platform modernization initiative that includes a future MySQL-to-Oracle migration
• Solve complex technical problems across application and database layers, combining hands-on Java backend development with advanced Oracle database engineering
• Collaborate with cross-functional teams to improve the performance and reliability of a business-critical platform serving 100k users

Is that you?

• 5+ years of experience building, debugging, and optimizing scalable Java backend applications
• Strong proficiency in Java 8–17, object-oriented design, design patterns, multithreading, and concurrency
• Hands-on Oracle development experience in production, with strong knowledge of database internals (indexing, query optimization, partitioning, replication, and transaction behavior)
• Advanced SQL skills, including performance troubleshooting
• Experience with production database operations (backup/restore, high availability, disaster recovery, failover), including executing changes with minimal downtime
• Experience writing unit tests with JUnit and Mockito
• Experience with cloud platforms (preferably GCP) and Kubernetes or similar orchestration tools
• Hands-on Linux/Unix experience and scripting skills in Bash, Python, or similar languages
• Ability to work independently, take ownership of technical tasks, and proactively identify and resolve blockers
• Strong communication skills and experience collaborating with cross-functional Scrum teams and leading technical discussions
• Upper-Intermediate+ English level

Desirable:

• Hands-on Oracle DBA experience in production
• Experience with major Oracle version upgrades or large-scale database migrations
• Oracle certification
• Experience with Groovy and Gradle
• Experience with CI/CD pipelines

Key responsibilities and your contribution

In this role, you'll combine Java backend development with Oracle database engineering, troubleshooting production issues, improving performance, and supporting migration activities.

• Design, develop, and maintain scalable Java backend applications
• Design the Oracle database storage schema for a new application
• Support the planning and execution of a future MySQL-to-Oracle migration
• Develop and optimize SQL queries to improve database performance
• Troubleshoot complex application and database issues in production environments
• Support production database operations and implement changes with minimal downtime
• Write and maintain unit tests using JUnit and Mockito
• Collaborate with cross-functional teams on technical design and implementation decisions
• Create and maintain technical documentation for relevant project activities