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Sr Frontend Engineer Jobs in Bothell, WA (NOW HIRING)

Summation

Senior Design Engineer

Bellevue, WA · On-site

$100 - $130/hr

The role Design Engineering at Summation lives at the intersection of product design and frontend engineering. As a Senior Design Engineer, you will ship beautiful, high-performance product ...

Axon

Frontend Senior Software Engineer I

Seattle, WA · On-site +1

$139K - $183K/yr

Your Impact As a Senior Software Engineer I on the Frontend Squad, you will collaborate with other engineers to shape and drive technical solutions and architecture for scalable, high-performance ...

Axon

Frontend Senior Software Engineer I

Seattle, WA · On-site

$141K - $225K/yr

Your Impact As a Senior Software Engineer I on the Frontend Squad, you will collaborate with other engineers to shape and drive technical solutions and architecture for scalable, high-performance ...

AIM

Senior Software Engineer - UI

Redmond, WA · On-site

$145K - $181K/yr

They are seeking a Senior Software Engineer with a UI focus to design and build the Operator UI and ... modern frontend engineering principles. • Drive improvements in code quality, accessibility ...

DevSelect

Front End Designer/Developer

Redmond, WA · On-site

$116K - $135K/yr

Currently we're looking for highly passionate senior-level front-end / user experience engineers with a keen sense for design.People that fit well on this team are highly collaborative, great ...

Hiya

Sr. GTM Engineer, Marketing

Seattle, WA · On-site

About the Role We're hiring a Sr. GTM Engineer, Marketing to transform Hiya's website into an AI ... Strong React/Next.js (or similar modern frontend framework) experience with demonstrated ability to ...

Bristol-Myers Squibb Company

Senior AI Engineer

Seattle, WA · On-site

$118K - $163K/yr

As a Senior AI Engineer on the AI Venture Studio team, you will be a hands-on senior individual ... Partner with frontend engineers throughout the software delivery lifecycle to define clean API ...

Bristol Myers Squibb

Senior AI Engineer

Seattle, WA · On-site

$118K - $163K/yr

As a Senior AI Engineer on the AI Venture Studio team, you will be a hands-on senior individual ... Partner with frontend engineers throughout the software delivery lifecycle to define clean API ...

Nvidia

Senior GPU Compiler Development Engineer

Redmond, WA · On-site

$137K - $180K/yr

PTX Compiler (PTXAS) apart from implementing PTX ISA is responsible for PTX Compiler Front End, ... As a senior member of the team, you will be responsible for leading efforts to enhance PTX Compiler ...

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Showing results 41-60

All JobsSr Frontend Engineer JobsSr Frontend Engineer Jobs in Bothell, WA

Sr Frontend Engineer information

See Bothell, WA salary details

$79.9K

$164.1K

$221.3K

How much do sr frontend engineer jobs pay per year?

As of Aug 10, 2026, the average yearly pay for sr frontend engineer in Bothell, WA is $164,073.00, according to ZipRecruiter salary data. Most workers in this role earn between $136,900.00 and $188,400.00 per year, depending on experience, location, and employer.

What is a Sr Frontend engineer?

Sr Frontend Engineers are experienced software developers who specialize in building and optimizing the user-facing parts of web applications. They lead the design and implementation of complex interfaces, ensure performance and accessibility, and often mentor junior engineers. Their role includes working closely with designers, backend developers, and product managers to deliver high-quality, scalable front-end solutions. Typically, they have a deep understanding of modern JavaScript frameworks, web standards, and best practices.

How does a Sr Frontend engineer typically collaborate with backend teams to deliver high-quality user experiences?

As a Sr Frontend Engineer, you’ll frequently work closely with backend developers to define APIs, discuss data requirements, and troubleshoot integration issues. Regular collaboration involves participating in planning meetings, code reviews, and joint debugging sessions to ensure frontend and backend components align seamlessly. This cross-team communication is essential for delivering responsive, efficient, and scalable user interfaces, and it also provides opportunities to influence architectural decisions and improve overall product quality.

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

AspectSr Frontend EngineerFrontend Developer
Required CredentialsBachelor's in CS or related field, 5+ years experience, advanced JavaScript frameworksBachelor's in CS or related field, 2-4 years experience, proficiency in HTML, CSS, JavaScript
Work EnvironmentLead projects, mentor junior staff, collaborate with cross-functional teamsImplement UI features, fix bugs, collaborate with designers and backend developers
Employer & Industry UsageTech companies, startups, large enterprisesWeb development agencies, startups, tech firms

The main difference between a Sr Frontend Engineer and a Frontend Developer lies in experience, responsibilities, and leadership. Sr Frontend Engineers typically have more experience, lead projects, and mentor others, while Frontend Developers focus on implementing features and fixing bugs. Both roles require strong JavaScript skills, but the senior role involves more strategic planning and team collaboration.

What are the key skills and qualifications needed to thrive as a Sr Frontend engineer?

To thrive as a Sr Frontend Engineer, you need advanced expertise in JavaScript, HTML, CSS, and modern frontend frameworks like React or Angular, typically supported by a degree in computer science or equivalent experience. Familiarity with version control systems (like Git), build tools (Webpack, Babel), and testing frameworks (Jest, Cypress) is standard, and certifications in relevant technologies are a plus. Strong problem-solving abilities, attention to detail, and effective communication help you collaborate with cross-functional teams and mentor junior developers. These technical and interpersonal skills are crucial for delivering robust, maintainable user interfaces that drive business outcomes.
What are popular job titles related to Sr Frontend Engineer jobs in Bothell, WA? For Sr Frontend Engineer jobs in Bothell, WA, the most frequently searched job titles are:
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Sr Frontend Engineer jobs near you

Senior Design Engineer

Summation

Bellevue, WA • On-site

$100 - $130/hr

Other

Re-posted yesterday

Job description

About Summation

Summation is building an AI Business Planning Platform for CFOs and finance teams. We combine a real-time modeling layer with Addison, our AI calculation engine, to turn messy enterprise data into decision-grade insights. Customers use Summation to model scenarios, explain variances, and automate weekly and monthly reviews.

The role

Design Engineering at Summation lives at the intersection of product design and frontend engineering. As a Senior Design Engineer, you will ship beautiful, high-performance product experiences in production code, lead our design system, prototype new interactions, and raise the bar on accessibility, motion, and polish. You will partner closely with Product, Design, and Engineering, moving from Figma to code to shipped features.

Roles & Responsibilities
  • Build production UI in React and TypeScript for Summation’s web app
  • Lead the Summation Design System: tokens, components, theming, accessibility, docs, and release workflow
  • Prototype end-to-end product ideas in code, validate with real data, and graduate winners into production
  • Craft motion and micro-interactions that clarify meaning and reduce cognitive load
  • Translate flows and states from Figma into resilient, testable components with strong state management
  • Drive UI performance: bundle hygiene, code-split plans, rendering strategy, perceived latency
  • Partner with data visualization to express complex financial concepts with clarity
  • Establish guardrails: lint rules, Storybook checks, accessibility checks, visual regression in CI
  • Mentor engineers and designers on interaction patterns, system thinking, and front-of-frontend craft
  • Contribute to product quality across the stack through reviews, pairing, and high-signal documentation
You will love this role if you
  • Love working across design and code and care about the details users feel
  • Think in systems: tokens, states, variants, docs, upgrade paths
  • Prototype ideas fast and are comfortable deleting code after an experiment
  • Believe accessibility, performance, and clarity are product features
  • Enjoy collaborating with PMs, designers, and backend engineers in a high-context startup
Required experience
  • 4+ years building production web UI with React and TypeScript
  • Strong CSS fundamentals: layout, fluid type and spacing, responsive systems, motion
  • Design system experience: tokens, component architecture, Storybook, documentation
  • Data visualization in production using one of Recharts, D3, Visx, ECharts, or similar
  • Accessibility and quality: semantic HTML, WCAG basics, keyboard and screen reader support, automated checks
  • Figma fluency: components, variants, auto-layout, dev mode, and handoff
  • Proven ability to take a concept from Figma to shipped code without heavy PM overhead
Nice to have
  • Remix or Next.js, Tailwind, shadcn/ui
  • Framer Motion for interaction design
  • WebGL or Canvas experience for advanced interactions
  • Visual regression and accessibility tooling in CI
  • Experience in fintech, analytics, or complex data products
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