Customer Success Engineer

About Onebrief Onebrief is collaboration and AI-powered workflow software designed specifically for military staffs. By transforming this work, Onebrief makes the staff as a whole superhuman - meaning faster, smarter, and more efficient. We take ownership, seek excellence, and play to win with the seriousness and camaraderie of an Olympic team. Onebrief operates as an all-remote company, though many of our employees work alongside our customers at military commands around the world. Founded in 2019 by a group of experienced planners, today, Onebrief’s team spans veterans from all forces and global organizations, and technologists from leading-edge software companies. We’ve raised $320m+ from top-tier investors, including Battery Ventures, General Catalyst, Sapphire Ventures, Insight Partners, and Human Capital, and today, Onebrief is valued at $2.15B. With this continued growth, Onebrief is able to make an impact where it matters most. Battle Road Digital, part of Onebrief, applies state-of-the-art innovations and experience from the video game industry to build the future of simulations, modeling, and operations with AtomEngine – our proprietary cloud-based game engine that’s making the world playable. About the Role As a Customer Success Engineer, you will ensure customers succeed with AtomEngine by directly extending and adapting the platform to meet their technical and operational needs. Sitting at the intersection of customer success and engineering, this role focuses on developing custom integrations, extensions, and workflows using the AtomEngine ModKit. In this role, you will work hands-on with customer scenarios, data, and environments—writing code, configuring systems, and validating solutions alongside customer teams. You will partner closely with Product, Engineering, and Customer Success peers to ensure customer-driven extensions align with platform direction, while also feeding real-world insights back into the core product. What You'll Do Serve as the technical interface and escalation point for complex customer issues requiring code-level investigation or intervention Design, develop, and maintain custom extensions, integrations, and workflows using the AtomEngine ModKit to meet customer-specific requirements Work directly with customer teams to design, implement, and validate new ModKit features, while ensuring solutions remain maintainable and compatible across platform releases Develop deep mastery of AtomEngine, becoming a subject matter expert able to confidently teach, demo, and guide customers through advanced workflows. Partner with Customer Success and Account teams to support adoption and long-term customer success, contributing technical insight where it matters most Advocate for customer needs internally, translating real-world use cases into clear, actionable input for Product and Engineering teams Act as a trusted technical advisor, helping customers operationalize AtomEngine within their existing workflows and environments What We Look For 3+ years of professional experience in a software engineering, solutions engineering, or technical customer-facing role involving hands-on development Demonstrated experience writing and maintaining production-quality code, including extending existing frameworks, SDKs, or plugin systems Proficiency in at least one general-purpose programming language used for application or game-adjacent development (e.g., C#, Python, C++, or similar) Strong understanding of software design principles, with an emphasis on modularity, maintainability, and backward compatibility Comfort working with customers face-to-face to debug, iterate, and validate solutions in real-world environments Clear written and verbal communication skills, especially when explaining technical concepts to mixed technical and non-technical audiences Willingness and ability to travel periodically to customer sites for onboarding, workshops, and hands-on technical collaboration Self-directed and effective in fast-moving, ambiguous environments, balancing customer urgency with sound technical judgment Due to federal contract requirements, U.S. Citizenship is mandatory for this position. Preferred Qualifications Active Secret or Top-Secret security clearance Prior military experience Notice to Third Party Recruitment Agencies Please note that Onebrief does not accept unsolicited resumes from recruiters or employment agencies. In the absence of an executed Recruitment Services Agreement, there will be no obligation to any referral compensation or recruiter fee. In the event a recruiter or agency submits a resume or candidate without an agreement Onebrief explicitly reserves the right to pursue and hire those candidate(s) without any financial obligation to the recruiter or agency. Any unsolicited resumes, including those submitted to hiring managers, shall be deemed the property of Onebrief.