Principal Full Stack Engineer (Agentic Systems & Enablement)

Principal Full Stack Engineer (Agentic Systems & Enablement) About Us Founded in 2011, Modus is a global, fully remote team of world-class technologists who thrive in a collaborative, innovative environment. We’re a digital product engineering partner for forward-thinking businesses. Our global teams work side-by-side with clients to design, build, and scale custom solutions that achieve real results and lasting change, partnering with industry leaders including AWS, GitHub, and Atlassian. We were fully remote before it was cool! Recognized as one of the Inc. 5000 Fastest Growing Private Companies for nine years and a top remote work company by FlexJobs, we have helped some of the world’s largest brands deliver powerful digital experiences. As an award-winning Atlassian partner with a world-class team, we help organizations innovate and solve complex challenges for Fortune 500 companies and beyond, we want to hear from you. Opportunity! We are looking for a Principal Full Stack Engineer to help accelerate feature delivery across complex enterprise applications while introducing and scaling production-ready agentic software engineering practices . You'll work directly within a client's engineering team, combining hands-on development using Java, Spring Boot, TypeScript, and React with advanced Claude Code workflows. You'll contribute to production features, optimize existing repositories for AI-assisted development, and mentor engineers on effectively incorporating agentic coding into their daily work. This is a highly hands-on engineering and consulting role for someone who combines deep full-stack expertise with a passion for AI-driven software development and technical enablement . Rather than simply recommending new practices, you'll demonstrate their value through collaborative coding, real feature delivery, and practical knowledge sharing. Requirements: 10+ years of professional software engineering experience building and delivering complex enterprise applications. Strong hands-on expertise in Java and Spring Boot , including backend services, APIs, and enterprise application development. Advanced proficiency with TypeScript and React , including modern frontend architecture and build tooling such as Vite. 2+ years of experience with agentic coding workflows , tool-augmented LLM programming, and AI-assisted development in production environments. Advanced hands-on experience with Claude Code , including agent configuration, repository memory files, architectural context, sub-agents, custom skills, and development guardrails. Experience integrating agentic development workflows into existing enterprise codebases to accelerate feature delivery, testing, and refactoring. Strong understanding of repository architecture, code organization, automated testing, and technical documentation to support reliable AI-assisted development. Experience defining structured development workflows, including task decomposition, context management, automated verification, and code review . Ability to design and implement deterministic guardrails that maintain code quality, architectural consistency, and reliable AI-generated outputs. Demonstrated experience mentoring and upskilling software engineers , particularly through hands-on pairing and collaborative development. Ability to work directly with client engineering teams, adapting technical explanations and coaching approaches to different levels of AI-assisted development experience. Strong experience working within Agile, cross-functional product teams , contributing to production features from requirements through deployment. Ability to independently navigate complex enterprise applications, understand unfamiliar codebases, and identify opportunities for engineering improvements. Excellent communication, collaboration, and consulting skills, with the ability to translate advanced technical concepts into practical engineering practices.