Senior Software Engineer- Frontend

Epirus is seeking a Senior Software Engineer - Frontend in Torrance, CA, to develop user interfaces for innovative technology solutions. The role involves collaborating with teams, optimizing performance, and mentoring others. Candidates should have 5+ years of front-end development experience, particularly with JavaScript, TypeScript, and React. A Bachelor's degree in a relevant field is required, along with expertise in UI applications and Agile methodologies.
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. 


 

As required by the Equal Pay Transparency Act, Epirus provides a reasonable range of minimum compensation for roles that may be hired. Actual compensation is influenced by a wide array of factors including but not limited to skill set, level of experience, and specific office location. For the state of California only, the range of starting pay for this role is: $163,300—$187,000 USD
Job posting details for Senior Software Engineer- Frontend at Epirus in Torrance, California, United States. Compensation / salary range: $163,300—$187,000 USD. ClimateTechList gathers 9,000+ job openings from over 509 climate tech companies and updates them daily.