Senior API Engineer – Advisor

Fiserv

Software Engineer designing and delivering resilient high-volume solutions using modern APIs and cloud infrastructure at Fiserv. Collaborating with cross-functional teams in an Agile environment.

Posted 6/3/2026full-timeAlpharetta • New Jersey, New York • 🇺🇸 United StatesSenior💰 $90,000 - $158,400 per yearWebsite

Tech Stack

Tools & technologies

AWSAzureCloudJ2EEJavaKafkaNoSQLOpenShiftSplunkSpringSpring BootSpringBootSQL

About the role

Key responsibilities & impact

Define and implement solution architecture for high‑volume, resilient systems.
Design, develop, debug and test object‑oriented Java/J2EE code, Spring and RESTful APIs (JSON over HTTPS).
Effective usage of AI for Software Engineering – Design/Coding/Code review/Debugging
Hands-on working experience in Azure, and Containerization
Build cloud‑native services following 12‑Factor principles and work with messaging platforms and integrations (Kafka, MQ, ESB).
Collaborate in Agile/Scrum delivery model with product managers, clients and engineering teams.
Contribute to CI/CD and DevSecOps practices to enable repeatable, secure deployments.
Perform database integrations, JPA, performance tuning and optimization across relational and non‑relational stores.
Apply design patterns and algorithmic approaches to improve reliability, maintainability, readability and performance.
Troubleshoot and operate within complex IT environments, including networking, security and performance considerations.
Cloud migration and platforms experience (Azure, PCF, OpenShift, AWS).
Experience with Splunk and file transfer technologies (NDM / Connect: Direct / IBM FileGateway).

Requirements

What you’ll need

8+ years recent experience as a member of engineering teams delivering resilient, high‑volume solutions built in Java/J2EE.
5+ years working on high‑volume transactional systems, including performance tuning.
5+ years hands‑on experience building RESTful APIs (JSON over HTTPS) with recent hands‑on experience with Java and Spring Frameworks (Spring Boot).
4+ years hands‑on experience designing, writing, debugging and testing object‑oriented code.
Experience developing 12‑Factor cloud‑native services messaging architectures (Kafka, MQ, ESB).
Experience with both relational and non‑relational database technologies (SQL and NoSQL).
Advanced understanding of design patterns, software algorithms and coding techniques that improve testability and maintainability.
High proficiency with modern CI/CD and DevSecOps practices.

Benefits

Comp & perks

Health insurance
Retirement plans
Paid time off
Flexible work arrangements
Professional development opportunities
Bonuses
Stock options
Equipment allowances
Wellness programs

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

JavaJ2EESpringRESTful APIsAI for Software EngineeringAzureContainerizationCI/CDDevSecOpsDatabase integrations

Soft Skills

CollaborationProblem-solvingDebuggingPerformance tuningReliabilityMaintainabilityReadabilityCommunicationTeamworkAgile/Scrum