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Sr Frontend Developer Jobs in Seattle, WA (NOW HIRING)

AIM

Frontend Developer

Redmond, WA · On-site

$116K - $135K/yr

They are seeking a Senior Frontend Developer to design and build user interfaces that integrate human operators with autonomous systems, focusing on accessibility and performance. Responsibilities ...

Ravenna Software, Inc

Senior Frontend Engineer

Seattle, WA · On-site +1

$160K - $200K/yr

About the Role At Ravenna, we are looking for a Senior Frontend Engineer who cares deeply about ... Improve developer experience Help improve the frontend development environment through better ...

The AES Group

Front End Developer

Seattle, WA · Remote

$106K - $123K/yr

Position Title: Front End Developer Location: Remote - USA Experience Level ... Senior-Level Let's create our future together at The AES Group! About The AES Group: The AES Group ...

Merican

Senior Software Engineer

Bothell, WA · On-site

$136K - $180K/yr

We are looking for a Senior Software Engineer with strong expertise in modern front end technologies and scalable application architecture. * The ideal candidate will play a key role in designing ...

Adobe

Senior Front-end Engineer, AI

Seattle, WA

$139K - $191K/yr

If so, the Photoshop team is looking for a passionate Senior Web developer to join us in shaping the future of digital imaging on the Web. Work within a fast-paced, agile environment, partnering ...

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All JobsSr Frontend Developer JobsSr Frontend Developer Jobs in Seattle, WA

Sr Frontend Developer information

See Seattle, WA salary details

$48.4K

$125.7K

$177K

How much do sr frontend developer jobs pay per year?

As of Jul 29, 2026, the average yearly pay for sr frontend developer in Seattle, WA is $125,652.00, according to ZipRecruiter salary data. Most workers in this role earn between $118,400.00 and $137,700.00 per year, depending on experience, location, and employer.

What is the difference between Sr Frontend Developer vs Frontend Developer?

AspectSr Frontend DeveloperFrontend Developer
Required ExperienceTypically 5+ years, leadership skills1-3 years, entry to mid-level
ResponsibilitiesAdvanced coding, mentoring, project leadershipImplementing UI features, bug fixes
Skills & CertificationsExpertise in JavaScript, frameworks, leadershipHTML, CSS, JavaScript basics
Work EnvironmentSenior roles in teams, project planningDevelopment teams, collaborative projects

The main difference between a Sr Frontend Developer and a Frontend Developer lies in experience, responsibilities, and leadership. Senior developers handle complex tasks, mentor others, and lead projects, while frontend developers focus on implementing features and fixing bugs. Both roles require strong JavaScript, HTML, and CSS skills, but senior roles demand more experience and strategic input.

What are Sr Frontend Developers?

Sr Frontend Developers are experienced software engineers who specialize in building and optimizing the user interfaces of web applications. They are responsible for translating design mockups into interactive, responsive, and accessible web pages using technologies like HTML, CSS, and JavaScript frameworks (such as React, Angular, or Vue). In addition to coding, Sr Frontend Developers often lead technical decisions, mentor junior developers, and collaborate closely with designers and backend engineers to deliver high-quality user experiences. Their expertise ensures that web applications are visually appealing, performant, and user-friendly.

What are some common challenges faced by Sr Frontend Developers when working on cross-functional teams?

Sr Frontend Developers often collaborate closely with backend engineers, UX/UI designers, and product managers. A common challenge in these environments is ensuring clear communication of technical requirements and design expectations to avoid misunderstandings that can lead to rework. Balancing user experience with technical feasibility is another frequent hurdle, especially when negotiating priorities between design vision and performance constraints. Effective Sr Frontend Developers proactively bridge gaps through strong documentation, regular alignment meetings, and by advocating for best practices in both development and design.

What are the key skills and qualifications needed to thrive as a Sr Frontend Developer, and why are they important?

To thrive as a Sr Frontend Developer, you need deep expertise in HTML, CSS, JavaScript, and modern front-end frameworks like React or Angular, usually backed by a degree in computer science or equivalent experience. Advanced knowledge of tools such as Git, Webpack, RESTful APIs, and proficiency with testing frameworks is typically required. Outstanding problem-solving abilities, strong collaboration, and effective communication set top performers apart in this role. These skills ensure the delivery of high-quality, user-friendly interfaces and seamless teamwork in fast-paced development environments.
What are popular job titles related to Sr Frontend Developer jobs in Seattle, WA? For Sr Frontend Developer jobs in Seattle, WA, the most frequently searched job titles are:
What job categories do people searching Sr Frontend Developer jobs in Seattle, WA look for? The top searched job categories for Sr Frontend Developer jobs in Seattle, WA are:
Sr Frontend Developer jobs near you
Infographic showing various Sr Frontend Developer job openings in Seattle, WA as of July 2026, with employment types broken down into 80% Full Time, 8% Part Time, 1% Temporary, and 11% Contract. Highlights an 80% Physical, 5% Hybrid, and 15% Remote job distribution, with an average salary of $125,652 per year, or $60.4 per hour.

Frontend Developer

AIM

Redmond, WA • On-site

$116K - $135K/yr

Full-time

Re-posted 27 days ago

Job description

Job Summary:
AIM is transforming heavy machinery into AI-powered fleets, enhancing safety and performance in challenging environments. They are seeking a Senior Frontend Developer to design and build user interfaces that integrate human operators with autonomous systems, focusing on accessibility and performance.
Responsibilities:
• As a Senior Software Engineer with a UI focus, you will design and build the two web surfaces that put a human in the loop with AIM's autonomous fleet: the safety-critical Operator UI and the multi-tenant portal — and the shared design system that powers both.
• Set the architectural direction for component APIs, accessibility, theming, versioning, deprecation paths, and migration tooling.
• Own the developer experience of every engineer at AIM who builds on top of the design system.
• Drive the patterns that make it easy to ship high-quality, accessible UI by default.
• Architect and implement the live 3D scene with Three.js / React Three Fiber / Drei — point clouds, terrain meshes with BVH acceleration, geofence editing, cut/fill visualization, machine overlays.
• Design state machines (XState), validation, and observability for safety-critical UI flows.
• Build teleop controls and integrate live video streaming with the rigor those interfaces demand.
• Drive the architecture for multi-tenant authorization, internationalization (including RTL), and real-time data.
• Design customer-facing experiences that hold up to the standards of best-in-class B2B software.
• Write clean, testable, maintainable TypeScript using modern frontend engineering principles.
• Drive improvements in code quality, accessibility, performance, reliability, and observability.
• Lead code reviews, design reviews, and architectural discussions.
• Work with TPMs, design, autonomy, controls, hardware, and field ops to ensure your UI works reliably on real machines and at real customer sites.
• Partner with FDEs to understand field realities — sun glare, gloves, dropped networks — and incorporate operational truth back into the codebase.
• Drive root-cause analysis and elimination of recurring defects.
• Mentor junior and mid-level engineers.
• Improve developer experience, CI/CD, test frameworks (Vitest, Cypress, Testing Library, vitest-axe, MSW), and local development tooling.
• Help define SWE excellence and engineering mechanisms across the org.
Qualifications:
Required:
• Bachelor's degree in Computer Science, Computer Engineering, Design, HCI, or equivalent hands-on experience.
• 5+ years of professional software engineering experience delivering production frontend systems.
• Deep expertise in TypeScript and React, including modern patterns (hooks, suspense, concurrent rendering).
• Experience with 3D web graphics: Three.js, React Three Fiber, Drei, WebGL, shaders, GLTF pipelines, BVH acceleration, or point-cloud rendering.
• Experience with real-time data and binary serialization: Protocol Buffers, gRPC-web, WebSockets, or high-frequency telemetry on the web.
• Experience with modern frontend tooling: Vite, npm workspaces (or pnpm/yarn workspaces), Storybook, modern testing stacks.
• Strong debugging skills using browser devtools, logs, telemetry, metrics, and tracing.
• Proven track record of delivering high-quality software independently and as part of cross-functional teams.
Preferred:
• Comfort working across the whole stack when needed.
• Experience with safety-critical or industrial UI: robotics, automotive, aerospace, medical, defense, energy — contexts where a bug has physical consequences.
• Experience with state machines (XState, statecharts) as a tool for safe UI flows, not as a buzzword.
• Experience with TanStack Router, TanStack Query, Zustand, Tailwind CSS v4, tailwind-variants, Floating UI, Mantine, or Visx.
• Experience with multi-tenant SaaS authorization (ReBAC/ABAC) and the UI patterns that make complex permissions comprehensible.
• Experience with frontend infrastructure: Docker, Kubernetes, CI/CD, micro-frontend architecture, OpenTelemetry, Sentry.
Company:
Scalable earthmoving is not optional. It’s required for our civilization to flourish. Founded in 2021, the company is headquartered in Bellevue, USA, with a team of 51-200 employees. The company is currently Growth Stage.

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