JavaScript Job: Senior UI Reactjs Developer

Job added on




Weehawken, New Jersey - United States of America

Job type


JavaScript Job Details



We are looking for a Senior UI Reactjs Developer to join our project team. The successful candidate will be a highly motivated team player and will have significant experience in application development, a strong technical background and good communication skills. He/she will interact directly with the users and with other technologists across the firm.



  • Develop new user-facing features using React.js, focusing on high-quality, dynamic, and responsive UI components.
  • Utilize Redux for state management to ensure consistency across user sessions.
  • Translate designs and wireframes into high-quality code, ensuring best practices in UI/UX standards.
  • Optimize application components for maximum performance across a wide range of web-capable devices and browsers.
  • Collaborate with back-end developers and web designers to improve usability and meet product stakeholder requirements.
  • Maintain and improve the website interface, fixing bugs, and addressing client feedback.


Required skills & experience:

  • Bachelor s degree or higher in Computer Science is preferred.
  • Excellent verbal and written communication in English language.
  • 8+ professional years of experience with programming languages/frameworks: ReactJS (Class and functional components)
  • Experience building SPAs and Micro Frontend architecture.
  • Thorough understanding of React.js and its core principles
  • Experience with global store management (Context API, Redux - RTK Query)
  • Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
  • Familiarity with newer specifications of ECMAScript (ES6, ES7 )
  • Strong TypeScript experience (at least 1 year in recent times);
  • Experience with styled-components (CSS-IN-JS)
  • Knowledge of CSS preprocessors, like SAAS & LESS
  • Experience with common front-end development tools such as Babel, Webpack, NPM, etc.
  • Familiarity with unit test and end-to-end libraries (jest, RTL, Cypress, Night watch)
  • Familiarity with code versioning tools (Git)
  • Familiarity with RESTful APIs
  • Knowledge of modern authorization mechanisms, such as JSON Web Token
  • Familiarity with modern front-end build pipelines and tools (GitLab)
  • Work with designers and developers to develop modern, intuitive user interfaces for our web properties.
  • Translating designs and wireframes into high quality code


Good to Have.

  • Older JavaScript libraries (jQuery, ExtJS, Backbone.js)
  • Basic experience with Node.js
  • Basic knowledge in Azure Cloud
  • Basic knowledge in database technologies (NoSQL).


We can offer you:

  • A highly competitive compensation and benefits package
  • A multinational organization with 48 offices in 19 countries and the possibility to work abroad
  • Laptop and a mobile phone
  • 10 days of paid annual leave (plus sick leave and national holidays)
  • Maternity & Paternity leave plans
  • A comprehensive insurance plan including: medical, dental, vision, life insurance, and long-/short-term disability (plans vary by region)
  • Retirement savings plans
  • A higher education certification policy
  • Commuter benefits (varies by region)
  • Extensive training opportunities, focused on skills, substantive knowledge, and personal development
  • On-demand Udemy for Business for all Synechron employees with free access to more than 5000 curated courses
  • Coaching opportunities with experienced colleagues from our Financial Innovation Labs (FinLabs) and Center of Excellences (CoE) groups
  • Cutting edge projects at the world’s leading tier-one banks, financial institutions and insurance firms
  • A flat and approachable organization
  • A truly diverse, fun-loving and global work culture.



Diversity & Inclusion are fundamental to our culture, and Synechron is proud to be an equal opportunity workplace and is an affirmative action employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Synclusive’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We strongly believe that a diverse workforce helps build stronger, successful businesses as a global company. We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We empower our global workforce by offering flexible workplace arrangements, mentoring, internal mobility, learning and development programs, and more.

All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law.