Software Engineer

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., Develop high-performance networking software across data-path, control-plane, forwarding, and protocol layers. Build packet-processing pipelines using C/C++, DPDK, VPP, and Network ASICs; implement SD-WAN, IPsec, VPN, firewall, DPI, and QoS capabilities. Integrate networking components into Kubernetes and Docker environments using distributed systems, message buses, and gRPC. Troubleshoot production systems and collaborate with distributed engineering teams. Top Skills: AWSBroadcomCC++CncfCnfDistributed SystemsDockerDpdkDpiGoGrpcIpsecKubernetesLinuxMessage BusesMicroservicesNetwork AsicsQosSd-WanUnixVnfVpnVpp ShareGate, Build and ship full-stack features for ShareGate Migrate’s new web application using React, TypeScript, C# and .NET. Integrate Microsoft APIs securely, establish scalable technical patterns, make architectural decisions, collaborate with Product and Design, and mentor teammates through code reviews. The role also emphasizes AI-assisted development with Claude and GitHub Copilot, technical risk management, and delivering high-quality migration experiences., Develop and maintain full-stack web application features, microservices, APIs, and front-end components using .NET Core, C#, TypeScript, Angular, and React. Design scalable solutions, apply OWASP and CWE/SANS Top 25 security practices, navigate complex business rules, critically evaluate AI-generated code, create unit tests, and collaborate with product and QA teams. Document code in French and work bilingually in French and English. Top Skills: .Net CoreAi Development AgentsAngularC#CweOwaspReactSans Top 25SQLTypescript

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• 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.

Error! Filename not specified.

Required Technical Skills

• C
• C++
• SQL

Preferred Technical Skills

• Claude Code

• Python

• PostgreSQL
• EZC

Remote Hiring Remotely in United States Expert/Leader Remote Hiring Remotely in United States Expert/Leader Lead modernization of a 30-year-old Store Management System by reverse engineering EZC file-based platforms, migrating data and applications to PostgreSQL, and developing enterprise C/C++ software. Responsibilities include architecture, systems integration, APIs, ETL, performance optimization, troubleshooting, documentation, and maintaining business continuity. The role also applies AI-assisted development tools for code analysis, documentation, testing, and modernization while mentoring teams and supporting legacy and modern environments. The summary above was generated by AI

Expected Duration: Initial contract term is expected to be one year, with extension opportunities available based on project timelines, business priorities, and contractor performance., Rate: Commensurate with experience, technical qualifications, and demonstrated expertise in C/C++, legacy platform modernization, and database migration. When submitting candidates, include your proposed bill rate requirements.