Java Engineer – Application, Database Modernization

🕒 November 16, 2025

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Mactores

WebsiteLinkedInAll Job Openings

51 - 200 employees

Founded 2008

🏢 Enterprise

Enterprise • Data

Mactores is a company that provides end-to-end data platform solutions aimed at accelerating business value through automation. Since 2008, Mactores has been helping businesses with digital transformation, offering services like Enterprise Data Lakes, Scalable Databases, Modern Data Warehouses, Automated DataOps, MLOps, and Generative AI solutions. They focus on enabling faster and cost-effective migrations and modernizations in data analytics, partnering with leading platforms to drive innovation and success. Mactores works alongside tech teams to strategize and implement the right data solutions timely and efficiently.

📋 Description

• Analyze and remediate large enterprise Java codebases to replace legacy or database-specific SQL constructs with modern, standards-compliant SQL. • Convert embedded SQL within Java services and MyBatis XML mappers, including rewriting constructs such as vendor-specific functions, sequences, pagination logic, dynamic SQL, and error-handling patterns. • Collaborate closely with schema and database migration engineers to ensure application-layer SQL aligns with the modernized target schema. • Refactor Java transaction logic, error-handling, drivers, and ORM/DAO layers to support the behavior of modern databases. • Participate in unit, integration, and performance testing to confirm functional parity and ensure applications meet performance SLAs post-modernization. • Support application cutover activities for production environments, including validation, monitoring setup, rollback planning, and stabilization. • Produce engineering documentation: SQL remediation guides, code-migration runbooks, troubleshooting guides, and knowledge-transfer material for customer teams. • Work across distributed teams (US & India) and collaborate with customer SMEs to ensure business logic alignment and successful modernization outcomes.

🎯 Requirements

• Bachelor’s degree in Computer Science, Engineering, or related field. • 3+ years of professional Java development experience (Spring, JDBC, MyBatis/Hibernate or equivalent). • Experience with application modernization, database migrations, or large-scale refactoring initiatives. • Strong SQL expertise and the ability to analyze, interpret, optimize, and rewrite complex SQL used within Java applications. • Deep understanding of JDBC, ORMs, Java transaction patterns, and database-driven application flows. • Experience working on enterprise-grade, high-performance applications with complex data interactions. • Strong communication skills and ability to work with global distributed teams in US time-zones.