Senior Software Engineer, UI
Epirus
About Epirus
Epirus is a high-growth technology company dedicated to overcoming the asymmetric challenges inherent to the future of national security. Epirus' flagship product, Leonidas, is a software-defined system built using intelligent power management techniques that allow power-hungry systems to do more with less.
Job Summary: This is an opportunity to join a team of skilled software engineers developing across the full stack down to bare metal. We are tackling new and critical problems and developing products ranging from energy weapons to AI-powered sensors and drone swarm defense. As we enhance, scale and deploy our systems, we need software engineers who want to take ownership and work closely with a skilled team from planning through implementation. At Epirus you will: · Create User Interfaces for cutting-edge systems, not just apps
- Create reliable and real-time optimized UIs
- Innovate to solve problems that are novel and critical to our nation
- Be a part of a talented team of skilled and experienced engineers and managers
- Be part of a culture that enables ownership, values mentorship, and promotes work/life balance
Responsibilities:
We’re looking for a Senior-level front-end engineer. A successful candidate will have deep experience implementing and developing all aspects of web-based UIs and will leverage that experience to do the following:
- Make powerful insights into our architectural decision-making, including framework trade-offs, state-management solutions, API and business layer patterns, and error-handling strategies
- Collaborate effectively with UX/UI designers to ensure the seamless translation of design concepts into functional, user-friendly interfaces
- Collaborate effectively with our backend teams to improve API designs
- Integrate novel front-end tech into our stack
- Take ownership of significant new features and plan them with meaningful technical document requirements descriptions, design wireframes, and software design diagrams•
- Optimize not just performance but developer experience, CI/CD, and testing
- Be a force for readability and clean coding patterns in our codebase.
- Mentor and collaborate effectively
Basic Qualifications:
- Bachelor’s degree in Computer Science, Engineering, or related field, or equivalent experience.
- 5+ years of professional front-end/UI development experience, JavaScript and TypeScript Expert
- Mastery in building UI applications with React
- Competence in at least one set of front-end build tools, bundling, and transpilation
- Competence in at least one set of testing frameworks for unit, integration, and e2e testing (e.g., Jest, Playwright)
- Mastery of CSS, SASS, and experience with Bootstrap, Tailwind, Material-UI, Shadcn
- Experience optimizing performance for real-time React applications
- Experience with Agile/Scrum development
- Experience working with a design/development pipeline
- At least 1+ years with at least one of the following: web-based 3d rendering, data visualization, mapping libraries
Preferred Skills and Experience:
- Experience with wireframing/design tools (e.g., Figma, Adobe XD, Sketch)
ITAR REQUIREMENTS:
- To conform to U.S. Government space technology export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a U.S. citizen, lawful permanent resident of the U.S., protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the U.S. Department of State. Learn more about the ITAR here.
At Epirus, you’ll work with technical peers and great people—and get first crack at some of the defining technology challenges of our time. Here, “impossible” is just a challenge. We're a diverse, fast-growing team of change-makers fueling the future of energy with revolutionary solutions. Join us and rewrite the rules.
