Sr Fullstack Engineer
Fiserv· midsize· Fintech / Payments· Oct 14, 2026 · 13d ago
Sunnyvale, California
In office
Full-time
Senior
$140K–$210K
5+ years exp
Job description
Calling all innovators - find your future at Fiserv.
We re Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we re involved. If you want to make an impact on a global scale, come make a difference at Fiserv.
Job Title
Sr Fullstack Engineer
We re Clover, the largest cloud-based integrated commerce operating system for small and medium businesses. You ve probably seen us in your favorite restaurants and shops; we support over 700k merchants worldwide and annually process over $240 billion card transactions. Clover enables merchants to accept payments, run their business and sell more. Come help us transform the way merchants do business, join Clover.
About the Team
At Clover, payments are at the absolute heart of our merchant experience. The Payments team owns the core transaction platform that processes billions of dollars in volume, serving hundreds of thousands of small and mid-sized businesses globally. We are not just building typical UI screens; we are constructing a highly reliable, low-latency transaction engine that guarantees correctness in every swipe, dip, tap, and click
What you will do:
Work on any of the following: building microservices, building accessible, beautiful, responsive user interfaces, and exploring ways to expand to new markets and regions.
Push the envelope on modernizing our stack; from code to infrastructure.
Owning one or more of the web apps that are written in React Typescript and the backend consists of multiple Java microservices connecting to MySQL.
Will work on our payments products like hosted checkouts, virtual components etc, which allows our merchants and consumers to use a variety of different purchase options to make purchases, and improve the user experience on the site to make the site experience seamless and beautiful.
As a full stack engineer, you will be expected to work on building new features, contribute to architecting solutions for new features, and ensure all code delivered to production is stable and well-tested.
Serve in a shared on-call rotation to investigate full-stack application failures, mitigating both UI defects and backend system outages to maintain a seamless user experience.
What you will need to have:
5 years of working experience building software with combined experience with a server-side language (e.g. Java) and front-end technologies (JavaScript/HTML/CSS)
Knowledge of a Single Page App framework (React, Angular, Vue.js, etc.)
Experience with API design and REST APIs .
Experience with Java development experience.
Understanding of Database technology such as MySQL/Oracle or NoSql DB.
Knowledge of automated testing practices
Experience designing and implementing new features from the ground up
What would be great to have:
Experience in the Payments domain or eCommerce Solutions.
Experience with AI Platforms
Salary Range
$140,000.00 - $210,000.00
These pay ranges apply to employees in Sunnyvale, California. Pay ranges for employees in other states may differ.
It is unlawful to discriminate against a prospective employee due to the individual s status as a veteran.
For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company’s sole discretion.
Thank you for considering employment with Fiserv. Please:
Apply using your legal name
Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).
Our commitment to Equal Opportunity:
Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.
If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact AskHR.US fiserv.com . Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv’s Disability Accommodation Policy for additional information.
Note to agencies:
Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
Warning about fake job posts:
Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.
Application prep
Use the role’s language and application details while tailoring your materials.
Keywords to mirror
reacttypescriptjavajavascriptangularvueapirestai
- Platform
- workday
- Effort
- long