React Front-End Developer Job at Robert Half (Seattle)

Senior Software Engineer, Front-End or Full Stack

As a Senior Front-End Software Engineer, you will be working on a state of the a...

Location

United States , Marriott International HQ

Salary:

108300.00 - 190200.00 USD / Year

Marriott Bonvoy

Expiration Date

Until further notice

Requirements

7+ years of professional experience in front-end development
Strong proficiency in React and TypeScript
Solid understanding of web markup, including HTML5 and CSS3
Experience with state management libraries like Redux, Mobx, Zustand
Knowledge of modern front-end build tools and workflows (e.g., Webpack, Vite)
Excellent problem-solving skills and attention to detail
Effective communication and teamwork skills
Experience with monitoring tools like Dynatrace, Splunk, et al.
Proven ability to work in an Agile development environment
Experience with RESTful APIs and asynchronous programming

Job Responsibility

Develop and maintain front-end components and user interfaces using React and TypeScript
Collaborate with cross-functional teams to design and implement user-friendly features for all form factors
Optimize applications for maximum speed and scalability
Ensure the technical feasibility of UI/UX designs
Participate in code reviews to maintain code quality and consistency
Troubleshoot and debug issues as they arise
Stay up-to-date with the latest front-end technologies and best practices
Mentor and provide guidance to junior developers
Communicate effectively with team members, stakeholders, and clients

What we offer

Bonus program
Comprehensive health care benefits
401(k) plan with up to 5% company match
Employee stock purchase plan at 15% discount
Accrued paid time off (including sick leave where applicable)
Life insurance
Group disability insurance
Travel discounts
Adoption assistance
Paid parental leave

Fulltime

Staff Front-End Engineer

We are looking for a Staff Front-End Engineer to lead our Design System initiati...

Location

France , Paris

Salary:

Not provided

Ledger

Expiration Date

Until further notice

Requirements

A minimum of 8 years of experience in software development
Significant experience in building and maintaining a library of UI components
Strong proficiency in HTML, CSS, and JavaScript
Extensive knowledge of Web APIs and CSS features, as well as their browser support
Experience with React
Experience with testing frameworks
Familiarity with design tools such as Figma
Expertise in Responsive and Adaptive Design
Experience with version control systems
Awareness of accessibility standards and best practices (a11y)

Job Responsibility

Lead the development, and maintenance of our design system in React and React Native
Define best practices, guidelines, and documentation for UI components, accessibility, and performance
Collaborate with our designers to translate Figma designs into reusable, high-quality components
Ensure consistency across platforms (web & mobile) by establishing a robust design token framework
Advocate for accessibility and ensure compliance with WCAG and other accessibility standards
Mentor engineers and contribute to team growth by providing technical guidance and code reviews

What we offer

Equity
Flexibility: A hybrid work policy
Social: Annual company outing for Ledgerdary Days, plus frequent social events, snacks and drinks
Medical: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage
Well-being: Personal development, coaching & fitness with our dedicated partners
Vacation: Five weeks of paid leave per year, in addition to national holidays and rest & relaxation (RTT) days
High tech: Access to high performance office equipment and gadgets, including Apple products
Transport: Ledger reimburses part of your preferred means of transportation
Discounts: Employee discount on all our products

Fulltime

Senior Front-End Software Engineer

KAYAK is looking for a Senior Frontend Engineer to join our growing frontend tea...

Location

Lithuania , Kaunas

Salary:

3333.00 - 6600.00 EUR / Month

KAYAK

Expiration Date

Until further notice

Requirements

Education in Computer Science or related field
5+ years of experience in Web Development
Solid knowledge and hands-on experience in HTML, CSS, JavaScript, TypeScript and React
Experience with centralised state management tools e.g. Redux
Experience with CSS preprocessors e.g. Sass, Less
Understanding how frontend build tools work and ability to configure them e.g. Webpack, Rollup
Experience writing unit and E2E tests
Fluency in English
Ability to thrive in a hybrid working model, working at least three office days per week

Job Responsibility

Engage in collaborative product development with global teams
Participate in planning and execution of new features
Design and implement innovative, high-performing and scalable frontend solutions
Maintain and enhance existing code
Maintain existing and develop new solutions for automation: unit, integration, E2E testing

What we offer

Work from (almost) anywhere for up to 20 days per year
Funds for your career growth
Access to thousands of on-demand e-learnings
Generous additional Health Insurance
Flexible sick time off
Additional financial support for your sick leave
Additional day off on your birthday
Company-wide vacation week once a year (winter holidays)
Additional financial support during parental leave
Free lunch twice a week and daily snacks at the office

Fulltime

Front-End Engineering Intern

KAYAK is seeking software engineering interns who are eager to tackle exciting p...

Location

Lithuania , Kaunas

Salary:

1038.00 EUR / Month

KAYAK

Expiration Date

Until further notice

Requirements

Are pursuing a degree in Computer Science or have hands on experience in software projects
Can perform with proven programming fundamentals
Have hands-on experience with HTML, JavaScript, CSS and React
Can communicate fluently in English
Have a genuine passion for code quality and testing
Have strong analytical approach
Have high energy, willingness to learn and are not afraid to ask questions
Are able to attend the office in Kaunas

Job Responsibility

Engage in collaborative product development with global teams, refining your programming skills along the way
Innovate and enhance features under expert mentorship, unlocking your full potential
Swiftly troubleshoot issues with the guidance of experienced professionals, driving impactful results
Experience a transformative journey of growth with our dedicated team, evolving into a proficient engineer ready to thrive in the tech industry

What we offer

Flexible sick time off
Additional financial support for your sick leave
Additional day off on your birthday
Company-wide vacation week once a year (winter holidays)
Free lunch twice a week and daily snacks at the office
Free yoga twice a week
Paid volunteering time
No meeting Fridays
Office and team events such as summer camp, KAYAK birthday, winter party and more!
Company-paid therapy sessions through SpringHealth

Fulltime

Front-end Web Developer

Robert Half Technology is currently seeking a Front-end Web Developer for an exc...

Location

United States , Greenville

Salary:

Not provided

Robert Half

Expiration Date

Until further notice

Requirements

2+ years direct web development and project implementation experience
working knowledge of current web development languages- (JavaScript, HTML and CSS)
experience with modern JS frameworks and libraries such as Node, React, Redux, Angular, React Native and Vue.js is a plus
strong knowledge of compatibility and cross-browser issues
able to iterate quickly turning mockups into HTML and CSS
a real passion for the end-to-end solutions that drive the user experience and customer happiness
experience caring for the technical needs of sites, apps and integrations with high volume traffic
deep understanding of how a mobile user experience differs from the experience on a web or other application

Job Responsibility

drive and code solutions using creative solutions
collaborate with key partners to deliver on time tested and reusable code in a rapidly changing environment
identify business needs and adapt solutions that align with the company goals
work through complex business processes and create simple solutions integrating best of breed tools
work with leadership and others to find the right solutions

What we offer

medical, vision, dental, and life and disability insurance
company 401(k) plan
free online training
access to top jobs
competitive compensation

Front-end Engineer, Explorer

Blockchain.com is connecting the world to the future of finance. As the most tru...

Location

Argentina , Buenos Aires

Salary:

Not provided

Blockchain

Expiration Date

Until further notice

Requirements

At least 4 years of professional front-end development experience
Proficiency in React/Next.js, ES6, Styled Components, and React Context
Experience building innovative data visualizations and scalable web applications
Strong understanding of asynchronous programming (JavaScript Promises, async/await) and front-end architectural patterns
Experience with Node.js backends and API development
Familiarity with unit testing and automated CI/CD pipelines
A growth mindset—you actively seek feedback, iterate rapidly, and push yourself to improve
Clear communication skills and enjoyment of working in diverse, distributed teams

Job Responsibility

Build & Ship: Develop beautiful user interfaces for one of the most popular and visited websites in the crypto ecosystem
Collaborate: Work closely with designers, product managers, and other engineers to translate user stories into delightful, performant web features
Own Features: Take full responsibility for feature development—planning, debugging, testing, and releasing to production—with an eye on continuous improvement and scalability
Stay Curious: Explore the latest front-end tools and technologies (React, Next.js, Styled Components, ES6, etc.), share insights with the team, and champion best practices

What we offer

Competitive full-time salary based on experience and meaningful equity in an industry-leading company
The opportunity to be a key player and build your career at a rapidly expanding, global technology company in an exciting, emerging industry
Performance-based bonuses
Apple equipment provided by the company
Work from Anywhere Policy: You can work remotely from anywhere in the world for up to 20 days per year

Fulltime

Web3 Front End Developer

The Childhood Cancer Society is dedicated to supporting families facing pediatri...

Location

Salary:

Not provided

Childhood Cancer Society

Expiration Date

Until further notice

Requirements

Proficiency in front-end technologies such as React, JavaScript, or similar frameworks
Experience creating intuitive and user-friendly interfaces
Familiarity with blockchain wallet integrations and Web3 frameworks (ethers.js, web3.js)
Strong problem-solving skills and attention to detail
Excellent communication and teamwork abilities

Job Responsibility

Design and implement a user-friendly website for the cryptocurrency
Develop purchase mechanisms and integrations with cryptocurrency wallets
Ensure a seamless user experience for donors and supporters
Participate in code reviews and provide constructive feedback
Maintain the security, scalability, and reliability of the platform

Front End Developer

Develop robust and maintainable front-end applications utilizing React, JSX, and...

Location

India , Indore

Salary:

Not provided

Cibirix

Expiration Date

Until further notice

Requirements

5+ years work experience
Develop robust and maintainable front-end applications utilizing React, JSX, and TypeScript
Design and implement application architecture with modular, reusable components
Collaborate effectively with UI/UX designers to transform visual designs into functional user interfaces using modern UI libraries such as Tailwind CSS, MUI, and Chakra UI
Apply CSS-in-JS methodologies using libraries like styled-components, Emotion, or MUI’s styling solution
Monitor and improve Core Web Vitals (LCP, INP/FID, CLS)
Utilize performance analysis tools such as Google Lighthouse, Page Speed Insights, WebPageTest, and the Web Vitals library
Debug and profile components using advanced tools like React Developer Tools (Profiler) and Chrome DevTools
Implement Real User Monitoring (RUM) and analytics using tools and libraries such as web-vitals, Sentry, or SpeedCurve
Optimize JavaScript bundle sizes through strategies like code splitting, lazy loading, tree-shaking, and by leveraging tools like Webpack Bundle Analyzer

Job Responsibility

Develop robust and maintainable front-end applications utilizing React, JSX, and TypeScript, ensuring high code quality and scalability
Design and implement application architecture with modular, reusable components and a well-structured, maintainable codebase
Collaborate effectively with UI/UX designers to transform visual designs into functional user interfaces using modern UI libraries such as Tailwind CSS, MUI, and Chakra UI
Apply CSS-in-JS methodologies using libraries like styled-components, Emotion, or MUI’s styling solution to deliver dynamic and consistent component-level styling
Monitor and improve Core Web Vitals (LCP, INP/FID, CLS) to ensure optimal performance, responsiveness, and stability of the user experience
Utilize performance analysis tools such as Google Lighthouse, Page Speed Insights, WebPageTest, and the Web Vitals library to assess and enhance front-end performance
Debug and profile components using advanced tools like React Developer Tools (Profiler) and Chrome DevTools
Implement Real User Monitoring (RUM) and analytics using tools and libraries such as web-vitals, Sentry, or SpeedCurve to capture real-world performance data and drive continuous improvement
Optimize JavaScript bundle sizes through strategies like code splitting, lazy loading, tree-shaking, and by leveraging tools like Webpack Bundle Analyzer to improve load times and runtime performance
Conduct ongoing testing and debugging to ensure application performance, responsiveness, accessibility, and cross-browser/device compatibility

Fulltime

React Front-End Developer

Robert Half

Location:
United States , Seattle

Category:
IT - Software Development

Contract Type:
Contract work

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
April 29, 2025

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