Senior Software Engineer, Full-stack

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. About the role We’re hiring Senior Software Engineers to tackle meaningful full-stack problems at Onebrief — the kind that sit at the intersection of system design and product complexity. Think: real-time collaboration features, interactive planning UIs, and high-trust workflows operating under real constraints. We value strong problem-solving skills and sound engineering judgment over mastery of any one technology. This is a senior individual contributor role with meaningful ownership within a team’s scope. You’ll lead multi-sprint initiatives, deliver high-quality solutions to well-defined problems, and contribute to the evolution of our systems as they grow in complexity. You’ll partner closely with Product Managers, Design, and fellow engineers to ship thoughtful, resilient features. What you'll do Own team-level architecture, delivering strategic and tactical software to address defined problems Begin to influence work outside of your direct team, solving complex problems impacting performance, features, and product design Support and unblock peers through async reviews, pairing, and mentorship Work in an async-first way , aligning clearly on scope, tradeoffs, and outcomes Build across the stack , using TypeScript/React/Node with PostgreSQL, Redis, and Kubernetes under the hood What we look for 6+ years of experience as a Software Engineer, including owning meaningful product or platform surfaces Experience collaborating across teams to deliver elegant, strategic solutions to defined problems A comprehensive understanding of the current state of web technology and best practices A track record of shipping in B2B SaaS or similarly demanding domains Clear, context-rich communication across PRs, RFCs, and collaborative docs Comfort navigating ambiguity and low-process, async environments Hands-on experience improving team velocity via tooling or process improvements Core tech we use Frontend : React, TypeScript, Vite, shared component libraries, client-side observability Backend : Node.js, PostgreSQL, Redis, secure RESTful APIs Infrastructure : Kubernetes, AWS, CI/CD pipelines Integrations : CSV/Excel/KML importers, JWT auth, PDF exports, DoD data systems 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.