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Kal Yimer
Mid-level Java Application Engineer specializing in FinTech backend systems
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About
Banking-focused software engineer with hands-on experience modernizing legacy systems and building internal full-stack applications using Java, Spring Boot, React, SQL, and MongoDB. Stands out for reliability-minded engineering in financial environments, including a scheduling system that handled Daylight Saving Time correctly, reduced manual work, and protected downstream processing.
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Key Strengths
- Legacy system modernization in a small Agile team
- Designed reliable scheduling systems handling time zones and Daylight Saving Time
- Built idempotent batch jobs and Splunk alerting for production reliability
- Full-stack development with React frontend and Java/Spring Boot backend
- Designed REST APIs with authentication and business logic
- Practical experience with SQL and MongoDB data separation to avoid sync issues
- Improved database performance with indexing and partitioning
- Executed phased zero-downtime schema migrations
- Delivered internal banking tools that automated reporting and reduced errors
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