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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Engineer - **Company:** Sphinx LLC - **Location:** Chantilly, VA, United States (Remote available) - **Experience:** Expert - **Salary:** $157,000.0 - $190,000.0 - **Contract:** Permanent contract - **Skills:** HTML, JavaScript (Programming Language), Application Programming Interfaces (APIs), Cascading Style Sheets (CSS), Software Quality, Code Review, Corona (Software Development Kit), Web Development, Design of User Interfaces, Python (Programming Language), Svelte, Software Deployment, Software Requirements Analysis, SQLAlchemy, Systems Integration, TypeScript, Web Applications, Web Application Frameworks, ReactJS, Caching, Backend, Fastapi, SC Clearance, Sphinx, Kubernetes, Front End Software Development, Oracle Cloud Infrastructure, Docker - **Published:** August 24, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=90328f27e716e89f ## About the Role * 5+ years of progressively responsible web development experience with modern software development approaches * Extensive experience with JavaScript, HTML, CSS, TypeScript, web frameworks (React, Svelte), and concepts such as caching, authentication, and CSP * Deep understanding of open architecture constructs (e.g., OMS, UCI, OCI) and modern containerized microservices architectures (Docker, Kubernetes) * You are a well-rounded engineer comfortable wearing multiple hats, such as a web designer, UX designer, and engineer * You possess a strong understanding of backend code with experience integrating the front-end and the backend (and the willingness to fix the backend when it's needed) * You are comfortable working with ambiguity and can self-direct your work while guiding others and supporting project leadership activities * You understand the importance of, and you have the desire to own a technical problem end-to-end * You've made enough mistakes and booked enough wins to know what not to build and what good looks like * Excellent communication skills, working with end-users to design and build solutions to their needs, a habit of self-directed learning of new technologies, and the ability to learn quickly and adapt to a fast-paced environment * Experience developing, testing, and deploying software within air-gapped or highly secure government network environments. * Must be eligible to obtain and maintain TS/SCI access. Bonus points if you have the following: * You have experience designing and developing intuitive user interfaces featuring real time, 2D/3D geospatial visualizations * Currently hold an active U.S. Government Secret Clearance, Must be a US Citizen and be able to obtain and hold a U.S. Top Secret security clearance and be eligible to obtain and maintain a TS/SCI clearance ., CLEARANCE ELIGIBILITY - This position requires eligibility to obtain and maintain a U.S. security clearance. For more information about U.S. Security Clearances: click here. To conform to U.S. Government export regulations, applicant must be a (i) U.S. citizen or national, (ii) U.S. lawful, permanent resident (aka green card holder), (iii) Refugee under 8 U.S.C. § 1157, or (iv) Asylee under 8 U.S.C. § 1158, or be eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here. ## Description Sphinx is hiring a Senior Full Stack Engineer to join our team, building the next generation of mission planning and command and control software for space communications programs. This team is tasked with creating modern, resilient services and capabilities to service the US Government. As our engineering organization continues to scale rapidly, you'll also play an important role in helping establish strong technical practices, supporting a growing team, and maintaining quality and consistency as we expand. As a Senior Full Stack Engineer, you will lead the development of intuitive UI/UX and enhance backend services to support Sphinx's space vehicle mission planning platform, which is being leveraged by some of the most important space missions operated by the US Government. We're seeking an experienced engineer with strong front-end development skills AND backend programming fundamentals. You'll work as an individual contributor and a lead for more junior engineers. What you will be focusing on: * Building performant, secure, tested web applications with a focus on automation and security * Designing, enhancing, and improving APIs between front-end and backend software services * Leading the development of critical features across the entire development lifecycle, with significant influence from user feedback, system requirements, design engineering, and evolving customer needs at scale. * Conducting thorough code reviews to maintain code quality, enforce best practices, and ensure code adheres to established standards * Creating and translating design mockups into functional, visually appealing user interfaces using modern front-end frameworks (FastAPI, SQLAlchemy, PostgREST, Svelte, React, CesiumJS) and technologies like Python, Javascript, Typescript, CSS, and Kubernetes * Advocating for improvements to product quality, security, and performance that have a particular impact on your team and others * Supporting junior engineering talent with mentorship or technical guidance, While this role is remote, the potential for travel may occur such as client visits, company gatherings, and other project related travel as needed may be required. ## Related Videos - [Continuous Documentation for Your Code](https://www.wearedevelopers.com/videos/798-continuous-documentation-for-your-code) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [Docker build without Docker](https://www.wearedevelopers.com/videos/100114-docker-build-without-docker) - [Slopquatting, API Keys, Fun with Fonts, Recruiters vs AI and more - The Best of LIVE 2025 - Part 2](https://www.wearedevelopers.com/videos/1765-slopquatting-api-keys-fun-with-fonts-recruiters-vs-ai-and-more-the-best-of-live-2025-part-2) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)