Senior Application Modernization Engineer

Liatrio is a company that enables real transformation by helping large enterprises modernize their legacy systems and implement AI solutions. The Senior Application Modernization Engineer will be responsible for modernizing software, building cloud-native systems, and mentoring engineers to improve delivery quality and speed.

Responsibilities:

• You'll be embedded with enterprise clients building real software — modernizing systems that have been running the business for years and building new ones that need to run it for years to come. Day to day that looks like:
• Breaking down monolithic legacy applications and rebuilding them as cloud-native services — designing APIs, decomposing tightly coupled systems, and migrating data without taking the business offline
• Building full-stack, production-grade applications — frontend interfaces, backend services, REST and GraphQL APIs, and the integrations that tie them together in complex enterprise environments
• Writing clean, testable, well-structured code across multiple languages and paradigms — and reviewing others' code with the same standard
• Designing and implementing event-driven and microservices architectures that can scale, evolve, and be maintained by teams who didn't build them
• Integrating AI and LLM capabilities directly into client applications — building agentic workflows, RAG pipelines, AI-augmented developer tooling, and intelligent automation that actually works in production
• Setting up and improving CI/CD pipelines, test automation, and delivery infrastructure so teams can ship with confidence
• Working alongside Operations teams to make sure what gets built can actually be run — containerized, observable, and operable in cloud environments
• Mentoring and uplifting the engineers around you — pairing, code review, and real-time feedback that makes the whole team better
• Keeping account leaders and architects informed of technical risk, blockers, and changes that affect the engagement

Requirements:

• 5+ years of hands-on software engineering experience
• Must be authorized to work in the United States or Canada without sponsorship
• Travel availability: 25-50% depending on client needs