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Sr. Mainframe Engineer

Sr. Mainframe Engineer

locationMerrimack, NH, USA
remoteHybrid
PublishedPublished: 1/29/2026
Full Time
The Role
Are you an ambitious Senior Software Engineer looking for an opportunity to work on essential systems that serve millions of customers? At Fidelity Investments, we offer you the chance to join our R4 Responsive Security Master team in Merrimack, NH!
We are seeking a Senior Software Engineer with strong mainframe development expertise and working knowledge of distributed technologies to join the R4 Responsive Security Master team, which manages reference data and pricing systems within Brokerage Recordkeeping Technology.
In this hands-on engineering role, you will collaborate closely with business partners, architects, and engineering teams to support and maintain high volume production platforms that serve millions of Fidelity customers. You will focus on production support, incident remediation, application enhancements, and continuous improvement across both mainframe and distributed environments.

The Expertise and Skills You Bring:
• Education: Bachelor’s degree in computer science or related field, or equivalent experience.
• Experience: Proven expertise with mainframe technologies and working knowledge of distributed systems.
• Solid hands-on development skills in mainframe languages and technologies (Cobol, CICS, VSAM, JCL, utilities, FileAid, Endevor, debuggers, schedulers, etc.).
• Proficiency with the DB2 database management system and database processing concepts.
• Extensive experience in SQL language.
• Deploy and support software releases into production environments.
• Strong knowledge of and experience with the overall testing process.
• Any knowledge or experience in distributed technologies, cloud computing, and/or Java programming is a plus.
• Specific Certifications: Relevant certifications in mainframe and distributed technologies are desirable.
• Skills: Effective communication, collaboration, and problem-solving abilities. Capacity to successfully implement complex solutions in a dynamic environment.

The Team
We have a relentless dedication to our clients, offering world-class technology solutions that differentiate us in the industry. Our team strives to maintain the highest standards in managing reference data and pricing systems. We engage with various interested parties to ensure the smooth operation and ongoing advancement of our platforms. Our greatest asset is our people - join us and contribute to our success!
Most roles at Fidelity are Hybrid, requiring associates to work onsite every other week (all business days, M-F) in a Fidelity office. This does not apply to Remote or fully Onsite roles.
Please be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.
Company Overview
At Fidelity, we are passionate about making our financial expertise broadly accessible and effective in helping people live the lives they want! We are a privately held company that places a high degree of value in creating and nurturing a work environment that attracts the best talent and reflects our commitment to our associates. We are proud of our diverse and inclusive workplace where we respect and value our associates for their unique perspectives and experiences. For information about working at Fidelity, visit FidelityCareers.com. Fidelity Investments is an equal opportunity employer. Fidelity will reasonably accommodate applicants with disabilities who need adjustments to complete the application or interview process.
Fidelity TalentSource, is the in-house temporary staffing provider for Fidelity Investments. Unlike traditional staffing agencies, we are an internal business unit within Fidelity’s Talent Acquisition team, dedicated to recruiting talent from various backgrounds for roles in Fidelity’s regional and investor center locations. Our mission is to help you experience Fidelity’s diverse and inclusive workplace while expanding your skill set and professional network, with the ultimate goal of conversion to full-time employment as part of Fidelity’s long-term strategy.
For information about working at Fidelity TalentSource, visit FTSJobs.com.
Fidelity TalentSource will reasonably accommodate applicants with disabilities who need adjustments in order to complete the application or interview process. Please email us at HR@ftsjobs.com if you would like to request an accommodation.