PP - Frontend Engineer - 143

Thaloz
San Mateo, CA

Our client, a leader in mobile payment systems, is seeking a Senior Fullstack Frontend Engineer to own and solve complex frontend challenges in connected payments. You will contribute to a major payments platform used by over 27 million monthly active users and supporting $100 billion in transaction volume, ensuring reliability, performance, and quality across the web experience.

This role is an opportunity to take technical ownership of mission-critical frontend systems, work across the full stack with Node.js/Express when needed, and improve testing and observability practices using Jest and React Testing Library.

Responsibilities

  • Design and develop React-based web applications and UI components for a high-scale payments platform
  • Build and maintain unit and functional tests using Jest and React Testing Library
  • Debug client-side issues and trace problems across the web application stack, including server-side Node.js/Express logs
  • Diagnose and resolve production issues, contributing to release support and incident response
  • Collaborate with engineers and QA to ensure code quality, test coverage, and reliable deployments
  • Review and improve frontend architecture and testing practices
  • Implement cross-browser compatible solutions and optimize for consistent user experience
  • Contribute to backend endpoints and integrations as needed using Node.js and Express

Qualifications

  • 5+ years of professional JavaScript experience
  • 3+ years of professional React experience
  • Proficiency writing unit and functional tests with Jest and React Testing Library
  • Practical experience with Node.js and Express and a basic fullstack understanding
  • Strong debugging skills and ability to trace issues across client and server logs
  • Experience contributing independently to production React applications
  • Ability to collaborate effectively with engineering teams for QA and release support
  • Solid understanding of testing practices and maintaining test coverage

Nice-to-Have Skills

  • Experience ensuring cross-browser compatibility
  • Strong CSS skills
  • Familiarity with React Hooks
  • Experience with Apollo GraphQL
#J-18808-Ljbffr
Posted 2026-01-15

Recommended Jobs

Night Floor Manager

Jetro / Restaurant Depot
Oakland, CA

Position Title:  Night Manager MEX Department:  Branch Floor Supervisor:  Branch Manager FLSA: Exempt Position Summary: Supervises Stockers and Hilo driver’s during second shift and thi…

View Details
Posted 2025-12-10

Applied Scientist - ML Systems & Compiler (Neuron)

Amazon
San Francisco, CA

A leading technology company in California seeks talented scientists for the AWS Neuron Science Team. You will enhance their software stack and collaborate with customers to identify barriers and opt…

View Details
Posted 2026-01-15

People Technology Workday Developer

gusto
San Francisco, CA

About Gusto At Gusto, we're on a mission to grow the small business economy. We handle the hard stuff—like payroll, health insurance, 401(k)s, and HR—so owners can focus on their craft and custo…

View Details
Posted 2025-12-30

Distribution Tech

PHS Bio-Medical Services
Victorville, CA

Overview Join our team of dedicated professionals who provide services and operational support to award winning hospitals through roles in supply chain, IT and cybersecurity, clinical engineering…

View Details
Posted 2026-01-15

Warehouse Support Specialist

ShipBob
Moreno Valley, CA

As a member of the ShipBob Team, you will... Grow with an Ownership Mindset : We champion continuous learning and proactive innovation. Team members are encouraged to identify challenges and t…

View Details
Posted 2025-12-27

Sr. Strategic Account Manager (Remote)

jobgether
California

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Strategic Account Manager - REMOTE. In this role, you will play a pivotal part in building a…

View Details
Posted 2026-01-09

Associate QA Engineer

Veeva Systems
Pleasanton, CA

Veeva Systems is a mission-driven organization and pioneer in industry cloud, helping life sciences companies bring therapies to patients faster. As one of the fastest-growing SaaS companies in histo…

View Details
Posted 2025-07-31

Respiratory Care Practitioner Part Time Days

ScionHealth
Santa Ana, CA

At ScionHealth , we empower our caregivers to do what they do best. We value every voice by caring deeply for every patient and each other. We show courage by running toward the challenge and…

View Details
Posted 2026-01-15

Senior Special Agent

Department of Corrections & Rehabilitation
San Bernardino County, CA

Job Description and Duties Under the direction of the Special Agent-In-Charge (SAC) the Senior Special Agent (SSA) may be assigned to a regional office, the Central Intake Unit (CIU), the Fore…

View Details
Posted 2026-01-15

Senior Structural Engineer

Disneyland Resort
Anaheim, CA

“We create happiness.” That’s our motto at Disney Experiences. At Disney, you’ll help inspire magic by enabling our teams to push the limits of entertainment and create innovative built environments. …

View Details
Posted 2026-01-09