Principal Application Modernization Engineer

About Us: At Liatrio, we enable real transformation. We help industry-leading enterprises break free from legacy systems and adopt AI that reshapes how teams build, deliver, and thrive at scale. We partner directly with enterprise teams to embed AI-native practices into delivery by accelerating modernization, reducing risk, and shipping production-grade AI systems that set the standard for the industry. Our people embed directly inside client organizations, leading hands-on AI enablement and transformations that reshape how entire enterprises build and operate at scale. If you’re ready to lead real AI transformation, this is where you belong. About the Role: The Principal Application Modernization Engineer is a senior technical leader who defines the scope of technical work, owns the architectural direction of complex workstreams, and is accountable for the technical outcomes of the engagement. You operate in ambiguity and make it clear. You walk into a legacy codebase, a stalled migration, or a cloud-native effort that's lost its footing, and you quickly develop a credible read on what's actually happening and what needs to change. You make the hard technical calls and communicate them in a way that builds trust with both the engineers executing the work and the technical leaders on the client side. What You'll Do: Technical Ownership and Architecture Define the scope of technical work related to deliverables and milestones of the engagementOwn the architectural direction of your workstream — making key technical decisions, documenting tradeoffs, and ensuring the team is building toward something coherent and maintainableResponsible for code quality, architecture, and technical direction across the teamWrite and review production code across the stack — your technical judgment sets the bar, and you're in the work alongside the teamIntegrate AI and LLM capabilities into client applications — designing the architecture for agentic workflows, RAG pipelines, intelligen