Senior Frontend Engineer — Remote, React/Next.js

Mosaec; Town of Sweden (NY); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Get paid, not played

8-hour working days with clients

Up to 24 flex days per year

Job summary

Mosaec is seeking a Senior Frontend Developer with strong React.js and Next.js skills for one of our clients. You are a growth-oriented candidate who enjoys turning ideas into exciting products.

Ideal candidates have 5+ years of frontend experience, mastery of HTML, CSS, JavaScript, TypeScript, and modern tooling, plus experience with Redux or MobX and testing with Jest or Cypress. This role requires CET timezone alignment and remote collaboration.

Qualifications

• Minimum of 5 years of frontend development experience with a strong portfolio in React.js and Next.js.
• Proficiency in HTML, CSS, JavaScript, TypeScript and modern frontend tooling.
• Experience with state management libraries such as Redux or MobX.
• Proficiency with testing frameworks like Jest, Cypress, or Testing Library.
• Strong knowledge of Git and version control.

Responsibilities

• Design, develop, and maintain high-performance web applications using React.js and Next.js.
• Create reusable UI components with a focus on performance and accessibility.
• Collaborate with designers, backend developers, and product managers to translate user needs into functional apps.
• Write clean, well-documented code following best practices.
• Identify and address performance bottlenecks for smooth user experiences.
• Conduct unit, integration, and end-to-end testing to ensure reliability.

Skills

React.js

Next.js

TypeScript

HTML/CSS/JavaScript

State management (Redux/MobX)

Testing (Jest/Cypress)

Git

Tools

Redux/MobX

Jest

Cypress

Testing Library

Job description

Mosaec is seeking a Senior Frontend Developer with strong React.js and Next.js skills for one of our clients. You are a growth-oriented candidate who enjoys turning ideas into exciting products.

Ideal candidates have 5+ years of frontend experience, mastery of HTML, CSS, JavaScript, TypeScript, and modern tooling, plus experience with Redux or MobX and testing with Jest or Cypress. This role requires CET timezone alignment and remote collaboration.