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)
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