Principal Lead Software Engineer

ONE datAI, a division of One Technologies, is a premier provider of professional Data and AI solutions. Since its establishment in 2006, the company has been at the forefront of Israel׳s data innovation field, offering services in data infrastructure, analytics, AI/ML solutions, and more. With a team of over 200 skilled professionals, ONE datAI specializes in transforming complex data challenges into strategic opportunities. Trusted by leading organizations across divere sectors such as finance, healthcare, retail, transportation, and manufacturing, ONE datAI is committed to delivering excellence and driving innovation.

Principal Software Engineer (HO)

We are looking for a senior, hands-on technological leader to drive the transformation of a critical, long-standing core product into a modern, scalable, and advanced platform.

This role combines deep ownership of system architecture, leading legacy modernization efforts, and hands-on execution, with direct impact on product delivery velocity, business scalability, and company growth.

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Responsibilities

• Lead the transformation of a business-critical product suite from legacy systems to a modern, scalable platform—while ensuring business continuity and accelerating delivery and development pace. Migration from legacy systems based on ASP / ASP.NET / VB6 to a modern Microsoft .NET environment (.NET 9) and React.

• Own the end-to-end technological design of ERP, POS, Mobile, and API-based products.

• Design and develop scalable solutions for high-concurrency, transactional systems.

• Improve performance and optimize Microsoft SQL Server environments, including Stored Procedures, data design, and query tuning.

• Lead the decomposition of existing DLL-based components and refactor business logic into modern architectures.

• Establish advanced development methodologies, CI/CD processes, and engineering excellence standards.

• Integrate AI agents and tools to enhance productivity, code generation, and SDLC (as an accelerator, not the core responsibility).

• Mentor and guide development teams.

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Requirements

• 8+ years of experience in software development within product-based companies (preferably in ERP domains).

• Strong background working in on-premise environments —Must have.

• Proven experience in senior technical leadership roles such as Principal Engineer, Tech Lead, or equivalent.

• Deep expertise in Microsoft .NET / C# / backend design.

• Significant experience with modern frontend technologies, especially React.

• Proven experience leading complex legacy modernization initiatives.

• Strong proficiency in Microsoft SQL Server.

• Experience building modern APIs and migrating from legacy systems (SOAP/XML → REST).

• Ability to stay hands-on while maintaining a broad system-level perspective.

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Advantages

• Experience with AI coding tools / AI agents / GitHub Copilot / Cursor / SDLC automation.

• Experience in ERP / Retail / POS domains.

Additional Details

   •   Location: Ramat Gan

   •   Work model: Hybrid

• CVs can be sent to: [email protected]