Senior Software Engineer, UI

Senior Software Engineer, UI

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 peopleand 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