Principal Software Engineer - Java

Career Area: Technology, Digital and Data Job Description: Your Work Shapes the World at Caterpillar Inc. When you join Caterpillar, you're joining a global team who cares not just about the work we do – but also about each other.  We are the makers, problem solvers, and future world builders who are creating stronger, more sustainable communities. We don't just talk about progress and innovation here – we make it happen, with our customers, where we work and live. Together, we are building a better world, so we can all enjoy living in it.

Lead and contribute to strategic modernization initiatives across   Helios   platforms, including transformation of legacy Java/J2EE applications to cloud-native (AWS)   and scalable architectures   Guide implementation approach for modernization initiatives, ensuring alignment between architecture intent and delivery execution   Define and guide target architecture patterns and design principles for modernization efforts   Drive experiments and proof-of-concepts (POCs) to evaluate new technologies, frameworks, and architectural patterns, enabling data-driven technology decisions   Translate successful POCs into scalable, production-ready solutions and drive adoption across teams   Influence engineering practices, standards, and architectural decisions across the broader   Helios   development community   Lead architecture and design reviews, and code reviews, enforcing coding standards, best practices, and maintainable design patterns   Mentor and coach engineers on low-level design, object-oriented design, and modern software engineering practices, elevating overall engineering capability   Deep-dive into complex legacy modules, identifying constraints, and proposing optimal modernization or refactoring strategies   Partner with DevOps and platform teams to ensure build, release, deployment readiness, and adoption of modern CI/CD and containerization practices   Identify and drive opportunities to embed AI and automation into engineering workflows, improving developer productivity, quality, and delivery speed   Required Skills & Experience   10+ years of experience  in software engineering, including strong hands-on development and technical leadership experience   Proven experience in Java/J2EE-based application development, including leading design and delivery of scalable services   Strong expertise in software architecture, design patterns, object-oriented design, and low-level design principles   Experience modernizing legacy enterprise applications and transitioning to microservices-based architectures   Hands-on experience with Spring frameworks, REST/JSON APIs, and distributed system design   Comprehensive knowledge of database technologies, including Postgres, SQL, and NoSQL, with proven ability to design, optimize, and troubleshoot data solutions.   Strong experience with data access technologies (JPA/Hibernate/JDBC)   Experience with testing frameworks (e.g., JUnit) and building high-quality, testable software   Proficiency with Git (branching, merging, tagging), Maven or equivalent build tools, and strong debugging skills   Experience leading or contributing to POCs, innovation initiatives, or modernization programs   Strong experience working with cross-functional and global teams, influencing without direct authority   Excellent technical communication, mentoring, and stakeholder engagement skills   ​ Experience with containerization technologies (e.g., Docker) and working with DevOps/CI-CD pipelines   Solid understanding of Kubernetes for orchestration of containerized applications   Experience working with software systems in autonomous vehicles, mining, construction, or similar industrial domains   Understanding of onboard (machine) and offboard (cloud/office) system architectures and their integration in distributed autonomy platforms   Familiarity with communication protocols and networking concepts