Senior Java API Integration Engineer
Cognizant· enterprise· IT Services· Aug 23, 2026 · 2mo agoPosted 65 days ago
Buffalo, New York, United States
In office
Full-time
Senior
$145K–$185K est.
Before you apply
Ghost Signal:
Open 65 days.
Job description
About the role
As a Java API Integration Engineer, you will make an impact by designing, developing, and supporting secure integrations that enable customer onboarding, ACH origination, transaction inquiries, and payment-status tracking. You will be a valued member of the technology team and collaborate with business, operations, risk, fraud, infrastructure, and vendor stakeholders.
In this role, you will:
• Implement and integrate Fiserv PEP+ Direct APIs for customer onboarding, ACH origination, inquiries, and status tracking.
• Develop and maintain REST and SOAP API integrations using JSON, WSDL, and OpenAPI/Swagger.
• Support ACH exception, return, investigation, and reconciliation processes.
• Participate in technical design, testing, implementation, deployments, and production support.
• Troubleshoot integration and operational issues, identify root causes, and coordinate timely resolution.
• Support API gateways, secure service-to-service communication, API publishing, subscriptions, token management, and webhooks.
• Collaborate with business and technology teams to deliver reliable payment solutions.
Location: Buffalo, New York.
Work model
We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position requiring three days per week onsite and two days remote in Buffalo, New York.
The working arrangements for this role are accurate as of the date of posting. This may change based on the project you’re engaged in, as well as business and client requirements. Rest assured, we will always be clear about role expectations.
Visa sponsorship
This position is not eligible for visa transfer or sponsorship, now or in the future.
Compensation
The annual salary for this position is $81,337 to $136,000 depending on experience and other qualifications of the successful candidate.
This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans. The salary and other compensation information is accurate as of the date of this posting and may change subject to applicable law.
Cognizant offers benefits for eligible employees, including medical, dental, and vision coverage; paid time off and holidays; 401(k) contributions; disability coverage; parental leave; and an employee stock purchase plan.
What you need to have to be considered
• Hands-on experience implementing banking or payment-service API integrations.
• Strong Java and Spring Boot development experience.
• Experience developing and integrating REST and SOAP APIs using JSON, WSDL, and OpenAPI/Swagger.
• Knowledge of API gateways, API publishing, subscriptions, and secure service-to-service communication.
• Experience with OAuth 2.0, TLS/mTLS, certificates, tokens, and secure authentication practices.
• Experience developing webhooks or event-driven integrations.
• Strong SQL skills and experience supporting financial-services applications.
• Professional experience working in banking or financial services.
These will help you stand out
• Experience implementing or integrating Fiserv PEP+ or PEP+ Direct.
• Experience integrating with mainframe platforms, including z/OS and DB2 for z/OS.
• Knowledge of Treasury Management or embedded-banking solutions.
• Understanding of ACH processing, NACHA rules, credits, debits, returns, NOCs, and CCD and CTX transaction types.
• Experience supporting ACH onboarding, origination, warehouse inquiries, payment-status workflows, exceptions, reconciliation, and fraud controls.
• Experience providing production support in regulated or high-volume payment environments.
We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.
Compensation information is accurate as of the date of posting. Cognizant reserves the right to modify salary, other compensation, and benefits information at any time, subject to applicable law.
About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.
Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.
If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email CareersNA2@cognizant.com for roles based in the Americas or CareersIndia2@cognizant.com for roles based in India.
Application prep
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Keywords to mirror
javaapirestsqlai
- Platform
- cognizant
- Effort
- medium
Benefits
Benefits detected in the listing.
Dental
Vision
401(K)
Paid Time Off
Parental Leave