Senior Java Engineer
Company Overview Lean Tech is a fast-growing technology services company that partners with organizations to build high-performing engineering teams across Latin America. We specialize in delivering top-tier talent that drives innovation, scalability, and long-term value for our clients. At Lean Tech, we prioritize professional growth, collaboration, and impactful work. Position Overview We are seeking a Senior Java Software Engineer with strong SQL expertise to support the continuous improvement of a large, legacy enterprise application following a recent migration to Microsoft SQL Server, focusing on stabilizing, optimizing, and refining the system’s database interactions and configurations. This role is ideal for a Java-focused engineer who brings strong experience working with relational databases and can help analyze current implementations, identify inefficiencies, and improve how the application interacts with the database. You will work across the full software development lifecycle, contributing to feature development while also acting as a technical advisor, helping the team enhance performance, optimize configurations, and apply best practices in database usage within a Java environment.
Key Responsibilities
Develop, troubleshoot, and maintain application code primarily in Java within a large, legacy codebase Analyze existing systems and identify performance issues and optimization opportunities, particularly in database interactions Act as a technical advisor to guide the team on database performance, configuration, and best practices in Java-based systems Optimize SQL queries, data access patterns, and application-database communication Improve application performance, quality, and responsiveness Diagnose and optimize database connection strategies (e.g., connection pooling, resource allocation) Contribute to the design, development, and enhancement of new and existing features Analyze current programs, diagnose issues, and propose effective, scalable solutions Participate in code reviews, testing, and continuous improvement initiatives Collaborate with product owners, QA teams, and database specialists Document code, system behavior, and database-related changes throughout the development lifecycle Provide support to testing and production support teams as needed Contribute to frontend components (JavaScript, HTML, CSS) when required, though this is not the primary focus Required Skills & Experience Bachelor’s Degree in Computer Science or related field Strong experience as a Java Software Engineer, working with Spring-based applications Strong hands-on expertise in Microsoft SQL Server (MSSQL), including SQL query optimization, performance tuning, and efficient data handling Experience working with low-level database access (e.g., JDBC, JDBC Template) in non-ORM environments Familiarity with REST APIs and integration with SQL databases Strong understanding of software design principles, design patterns, and data structures Experience analyzing and improving application performance and scalability Working knowledge of software testing practices Experience working with large, complex, or legacy systems Proficiency with development tools such as IntelliJ or Eclipse Ability to contribute across the full software development lifecycle Strong communication skills with the ability to provide technical guidance and recommendations
Nice to Have
Skills Experience with JSF, JSP, or similar frontend technologies Familiarity with DB2 Experience with Spring Boot Exposure to Azure environments Experience with stored procedures Familiarity with AI-assisted development tools (e.g., GitHub Copilot) Soft Skills Strong analytical and problem-solving mindset with a focus on performance Strong performance-oriented mindset with the ability to proactively identify inefficiencies Ability to evaluate systems and clearly communicate improvements Proactive and self-driven with a continuous improvement mindset Strong collaboration and interpersonal skills Detail-oriented, organized, and capable of handling multiple priorities Why You Will Love Working with Us Opportunity to work on a large-scale, evolving enterprise system Play a key role in improving performance and system efficiency Collaborate with experienced engineering teams in a supportive environment Long-term growth opportunities within Lean Tech Flexible, remote-first work environment (Colombia) Apply To This Job