Senior Full Stack Engineer

Fiserv

Full Stack Engineer developing high-performance e-commerce solutions for Fiserv, a leader in financial technology. Involves architecture, development, and mentorship to enhance omni-commerce capabilities.

Posted 6/24/2026full-timeSunnyvale • California • 🇺🇸 United StatesSenior💰 $140,000 - $210,000 per yearWebsite

Tech Stack

Tools & technologies

AWSDockerGoogle Cloud PlatformHibernateJavaJavaScriptKubernetesMicroservicesMongoDBMySQLNext.jsNoSQLReactSpringSpring BootSpringBootTypeScript

About the role

Key responsibilities & impact

Architect, build, and deploy high-performance e-commerce storefronts, secure checkout flows, and omni-channel merchant integrations
Develop responsive, SEO-friendly, and accessible user interfaces using React.js and Next.js, optimizing for Core Web Vitals and seamless user experiences
Design and implement highly available, secure microservices using Java, Spring Boot, and Hibernate
Model complex commerce data using MongoDB and MySQL
Build resilient systems capable of supporting multi-region scalability, localization, and regional compliance
Actively utilize AI-assisted developer tools to accelerate coding velocity
Lead code reviews, define architectural standards, and mentor mid-level/junior engineers

Requirements

What you’ll need

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

Benefits

Comp & perks

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

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaScriptTypeScriptReact.jsNext.jsJavaSpring BootHibernateMongoDBMySQLmicroservices

Soft Skills

leadershipmentoringcode reviewsarchitectural standards