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Paymentus

Senior React Developer

Paymentus
Canada · Full-time · Mid-Senior

Summary/Objective

We are seeking a highly skilled and experienced Senior React Developer to join our dynamic team. The ideal candidate will have a proven track record of designing, architecting, and delivering large-scale React applications using the latest development practices. You will play a key role in shaping the front-end architecture, ensuring optimal performance, and delivering high-quality, maintainable code. Additionally, you should have a keen eye for good user experience (UX), ensuring that the applications you build are not only functional but also intuitive and delightful for users. If you are passionate about building scalable, performant, and user-friendly web applications, we want to hear from you!


Essential Functions/ Responsibilities

  • Design, architect, and develop large-scale React applications using modern React practices (e.g., hooks, functional components, context API, etc.).
  • Optimize React applications for maximum performance, scalability, and maintainability.
  • Collaborate with cross-functional teams (designers, product managers, backend developers) to deliver high-quality features and solutions.
  • Write clean, reusable, and well-documented code following best practices.
  • Develop and maintain unit tests, component tests, and end-to-end (e2e) tests to ensure code quality and reliability.
  • Troubleshoot and debug issues, ensuring a smooth user experience.
  • Stay up-to-date with the latest trends and advancements in React and front-end development.
  • Mentor and guide junior developers, fostering a culture of learning and growth within the team.
  • Advocate for and implement user-centric design principles to ensure applications are intuitive, accessible, and visually appealing.


Required Qualifications

  • 6+ years of professional experience in front-end development, with a strong focus on React.
  • Proven experience designing and architecting large-scale React applications.
  • Deep understanding of React build processes, including Webpack, Babel, and other related tools.
  • Strong knowledge of React performance optimization techniques (e.g., memoization, lazy loading, code splitting).
  • Solid understanding of web/internet basics (e.g., HTTP, REST APIs, browser rendering, security).
  • Experience writing comprehensive unit tests, component tests, and e2e tests using tools like Jest, React Testing Library, Cypress, or similar.
  • Proficiency in modern JavaScript (ES6+), HTML5, and CSS3.
  • Familiarity with state management libraries (e.g., Redux, Zustand, Recoil).
  • Experience with version control systems (e.g., Git).
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and collaboration skills.
  • A demonstrated eye for good user experience (UX), with the ability to translate design concepts into functional, user-friendly interfaces.


Preferred Qualifications

  • Experience with TypeScript in React applications.
  • Familiarity with server-side rendering (SSR) and static site generation (SSG) using frameworks like Next.js.
  • Knowledge of CI/CD pipelines and DevOps practices.
  • Experience with responsive design and cross-browser compatibility.
  • Understanding of accessibility standards (WCAG) and best practices.
  • Experience working closely with UX/UI designers to implement pixel-perfect designs.


Interview Integrity

During the interview process, we're evaluating your individual problem-solving skills, creativity, and approach to challenges. While AI tools are part of your daily toolkit once you join, all interviews, assessments, and take-home assignments must be completed independently. You may not use AI tools, third-party services, coaching platforms, or content-farming services during any part of the interview process unless we explicitly permit it. We will clearly communicate when AI tools are allowed for specific assessments. Any indication of third-party assistance or AI-generated responses will result in immediate disqualification.


EEO Statement

Paymentus is an equal opportunity employer. We enthusiastically accept our responsibility to make employment decisions without regard to actual or perceived race,creed, color, age, sex or gender (including pregnancy, childbirth and related medical conditions), gender identity or gender expression (including transgender status), sexual orientation, national origin, ancestry, citizenship status, religion, marital status, physical or mental disability, military service or veteran status, genetic information, protected medical condition as defined by applicable state or local law, genetic information, or any other classification protected by applicable federal, state, and local laws and ordinances. Our management is dedicated to ensuring the fulfillment of this policy with respect to hiring, placement, promotion, transfer, demotion, layoff, termination, recruitment advertising, pay, and other forms of compensation, training, access to facilities and programs and general treatment during employment.


Reasonable Accommodation

Paymentus recognizes and supports its obligation to endeavor to accommodate job applicants and employees with known physical or mental disabilities who are able to perform the essential functions of the position, with or without reasonable accommodation. Paymentus will endeavor to provide reasonable accommodations to otherwise qualified job applicants and employees with known physical or mental disabilities, unless doing so would impose an undue hardship on the Company or pose a direct threat of substantial harm to the employee or others.

An applicant or employee who believes he or she needs a reasonable accommodation of a disability should discuss the need for possible accommodation with the Human Resources Department, or his or her direct supervisor.

Key Skills

Ranked by relevance

react ai ai tools ux responsive design javascript typescript responsive webpack devops server html5 cicd
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Posted
Apr 13, 2026
Type
Full-time
Level
Mid-Senior
Location
Richmond Hill
Company
Paymentus

Industries

Financial Services

Categories

Information Technology

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