Sr. Web Developer

Fiserv•Sunnyvale, CA

9d•$140,000 - $210,000•Onsite

About The Position

Fiserv is a global leader in financial technology, and our Clover platform empowers millions of small and independent businesses worldwide to accept payments and run their operations seamlessly. As a Web Developer on the Clover Gift Cards team, you will be at the heart of one of our most impactful and fast-growing merchant engagement platforms. In this role, you will help design, scale, and maintain the end-to-end engineering ecosystem that powers digital and physical gift card experiences across Clover point-of-sale (POS) hardware devices, web applications, and consumer portals.

Requirements

Bachelor’s Degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience).
7+ years of professional experience designing, developing, delivering, and supporting critical enterprise web applications.
Strong proficiency with JavaScript, TypeScript, HTML5, CSS, SASS/LESS, browser DOM APIs, and web build systems (e.g., Webpack, Gulp, Grunt).
Deep experience building responsive, highly accessible web applications using React, Next.js, or Ember.
Solid hands-on experience developing REST and GraphQL APIs, along with working knowledge of relational (MySQL) and NoSQL (MongoDB) databases and complex query design.
Experience working in cloud environments (preferably GCP) and writing automated web tests using modern frameworks (Jest, Cypress, Selenium).
Proven experience in Agile environments using Git, with an understanding of modern web architectures (micro-frontends, Webpack Module Federation, service workers).

Nice To Haves

Excellent written, verbal, and interpersonal communication skills, with a track record of effective cross-functional teamwork.
Proven experience leveraging AI software engineering tools (e.g., GitHub Copilot, IDE plugins, AI coding agents) to optimize workflows, accelerate debugging, and elevate overall developer velocity.
Back-End development or light knowledge in Java, Spring Boot & Microservices.

Responsibilities

Collaborate effectively within a multidisciplinary team of software developers and engineers to build intuitive merchant- and consumer-facing web interfaces.
Take full ownership of core services and feature delivery—from initial architecture and technical design through to deployment and production monitoring.
Translate product requirements into functional, maintainable, and extensible software while identifying technical requirements in product planning meetings.
Write automated developer tests for new features and update existing test suites to maintain low response times, high signal-to-noise quality, and optimal application performance.
Partner with QA and engineering colleagues to develop comprehensive test strategies, perform root-cause troubleshooting, and resolve complex application issues.
Participate in a regular team on-call rotation to maintain platform reliability and high availability for global merchants.

Benefits

Fuel Your Life program to support your physical, financial, social, and emotional well-being
Paid holidays and generous time away policies
No-cost mental health support through Employee Assistance Programs
Living Proof program to recognize your peers’ extra effort with points redeemable for rewards
Eight Employee Resource Groups to foster a collaborative culture and expand your network
Unparalleled professional growth with training, development, and internal mobility opportunities
Medical, dental, vision, life, and disability insurance options available from day one
Retirement planning and discounted shares with the Employee Stock Purchase Plan
Tuition assistance and reimbursement program
Paid parental, caregiver, and military leave