Systems Engineer - C/C++ Full Stack Developer

We are seeking a highly experienced Senior Systems Engineer - C/C++ Full Stack Developer to lead a strategic modernization initiative for a mission-critical Store Management System that has evolved over more than 30 years.

The program’s primary objective is the transformation of a proprietary EZC file-based database platform into a modern PostgreSQL relational database architecture. The legacy environment supports a large ecosystem of interconnected applications, system programs, libraries, batch processes, utilities, and business services that have accumulated decades of business logic, customizations, ad hoc enhancements, and non-standard implementations.

This role requires a hands-on engineering leader capable of analyzing complex legacy systems, reverse engineering undocumented functionality, designing modern architectures, and driving technical transformation while ensuring operational stability and business continuity., 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.

Enterprise Systems Integration

• Analyze dependencies across applications, libraries, services, utilities, interfaces, and batch jobs.
• Collaborate with architects, business analysts, infrastructure teams, and application owners.
• Develop integration solutions that support both legacy and modern environments.
• Produce technical documentation, architecture diagrams, and migration plans.

AI-Assisted Development

• Leverage AI-powered engineering tools to accelerate software delivery.
• Utilize AI tools for legacy code analysis, reverse engineering, dependency discovery, automated documentation, test generation, and modernization activities.
• Validate, optimize, and production-harden AI-generated code and architectural recommendations.
• Establish best practices and governance for responsible AI-assisted software development within enterprise environments.

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.

Expected Duration: Initial contract term is expected to be one year, with extension opportunities available based on project timelines, business priorities, and contractor performance., * 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., * 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

Best Regards