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Senior Systems Engineer - C/C++ Full Stack Developer (Legacy Database and Systems Modernization)
Location: Remote
Employment Type: Full-Time
Experience Level: Senior (10+ Years) Candidate submissions should clearly identify the candidate's years of experience for each key requirement, including C/C++, database modernization, PostgreSQL, legacy system transformation, along with other relevant qualifications.
Key Responsibilities
Legacy System Modernization
Lead the modernization of a 30+ year-old Store Management System platform.
Analyze and reverse engineer proprietary EZC file structures and data access patterns.
Develop migration strategies from EZC to PostgreSQL with minimal business disruption.
Identify and remediate technical debt, legacy dependencies, and non-standard implementations.
Design transition architectures supporting phased migration and coexistence of legacy and modern platforms.
Software Engineering
Design, develop, and maintain enterprise-grade solutions using C and C++.
Refactor and modernize large legacy codebases while preserving critical business functionality.
Develop APIs, middleware, integration services, and modernization frameworks.
Troubleshoot complex applications, database, and infrastructure issues.
Drive code quality, performance optimization, maintainability, and scalability initiatives.
Database Architecture & Migration
Design and implement PostgreSQL database schemas, indexing strategies, and performance optimization solutions.
Convert proprietary file-based data models into efficient relational database designs.
Develop ETL, conversion, reconciliation, and validation processes.
Ensure data integrity, auditability, and migration accuracy.
Optimize high-volume transactional and batch-processing workloads.
Required Qualifications
Bachelor’s degree in computer science, Engineering, Information Systems, or equivalent experience.
10+ years of software engineering experience.
8+ years of hands-on C/C++ development experience.
Extensive experience working with large-scale legacy systems and mission-critical enterprise applications.
Strong experience with relational database design.
Proven experience with database modernization and migration projects.
Deep understanding of software architecture, systems programming, and integration patterns.
Experience troubleshooting highly complex, distributed application environments.
Strong analytical and problem-solving skills.
Demonstrated experience applying AI-assisted development tools within enterprise software engineering environments.
Preferred Qualifications
Experience with proprietary, hierarchical, or file-based database platforms.
Experience in retail, store management, point-of-sale (POS), inventory management, merchandising, or supply chain systems.
Experience with high-volume transaction processing systems.
Experience modernizing legacy C/C++ platforms into service-oriented or API-driven architectures.
Familiarity with cloud technologies and modernization practices.
Experience leading technical teams and mentoring engineers.
Knowledge of DevOps, CI/CD, automated testing, and application observability.
Required Technical Skills
C
C++
SQL
Preferred Technical Skills
Claude Code
Python
PostgreSQL
EZC
Work arrangement
Yes
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