Sr Full Stack Engineer

Calling all innovators - find your future at Fiserv.

Were 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 were involved. If you want to make an impact on a global scale come make a difference at Fiserv.

Job Title

About your role:

To accelerate our leadership in the point-of-sale (POS) and financial technology sectors Clover is aggressively expanding our digital omni-commerce capabilities. As a Full Stack Software Development Engineering - Advisor I you will serve as a critical technical driver in building our next-generation website storefront and seamless checkout experiences. This vital role directly supports our 2026 strategic objectives to accelerate international expansions across APAC Japan and the EU eliminate backend dependencies to maximize feature velocity and pioneer AI-driven agentic commerce integrations.

What youll do:

• Full Stack Product Delivery: Architect build and deploy high-performance e-commerce storefronts secure checkout flows and omni-channel merchant integrations.
• Frontend Excellence: Develop responsive SEO-friendly and accessible user interfaces using and optimizing for Core Web Vitals and seamless user experiences.
• Backend & API Architecture: Design and implement highly available secure microservices using Java Spring Boot and Hibernate to reduce cross-team dependencies and time-to-market.
• Database & Infrastructure: Model complex commerce data using MongoDB and MySQL while deploying and scaling localized microservices using Kubernetes and Docker on Google Cloud Platform (GCP).
• Internationalization (i18n): Build resilient systems capable of supporting multi-region scalability localization and regional compliance for seamless multi-region traffic handling.
• AI Integration & Adoption: Actively utilize AI-assisted developer tools (e.g. GitHub Copilot Cursor ChatGPT) to accelerate coding velocity and design backend architectures capable of supporting smart product recommendations and agentic commerce integrations.
• Mentorship & Quality: Lead code reviews define architectural standards and mentor mid-level/junior engineers to foster a culture of engineering excellence.
• Responsibilities listed are not intended to be all-inclusive and may be modified as necessary.

Experience youll need to have:

• Core Experience: 5-8 years of professional software engineering experience building scalable enterprise-grade web applications.
• Frontend: Deep expertise in JavaScript/TypeScript and (SSR SSG and CSR strategies).
• Backend: Strong proficiency in Java and the Spring ecosystem (Spring Boot Spring Security) alongside ORM experience with Hibernate.
• Databases: Hands-on experience with both relational (MySQL) and NoSQL (MongoDB) databases.
• Cloud & DevOps: Experience designing and deploying microservices on GCP (or AWS) using Kubernetes Docker and CI/CD pipelines.
• AI Proficiency: Demonstrated ability to integrate AI into daily development workflows to increase productivity with a strong foundational understanding of LLMs and AI integrations.

Experience that would be great to have:

• Previous experience in Fintech POS or E-commerce platforms (direct familiarity with competing platforms like Shopify Toast Stripe etc. is a massive plus).
• Experience building software for global markets including managing the complexities of global tax currency conversion and localization.
• Deep understanding of web security PCI compliance and secure payment processing workflows.

How youll work:

• This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.
• This role requires use of a computer and audio equipment.

Benefits at Fiserv:

• 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

#LI-SH2

Salary Range

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 individuals status as a veteran.

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. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiservs Disability Accommodation Policy for additional information.

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Fiserv does not accept resume submissions from agencies outside of existing do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

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