Senior Mainframe Software Engineer Jobs (NOW HIRING)

Senior Mainframe Software Engineer
The Team
The Brokerage Record Technology Tax Engineering team within Fidelity Wealth Technology is looking for a passionate and experienced Senior Mainframe Software Engineer to help design, enhance, and modernize our mission critical tax processing systems. You will collaborate closely with architecture, product, and business partners to build reliable, scalable solutions that support Fidelity's brokerage and tax processing platforms.
The Purpose
As a Senior Mainframe Software Engineer, you will quickly develop a deep understanding of our mainframe ecosystem-including core applications, data flows, integrations, and end-to-end processing. You will be a key technical leader focused on engineering excellence, platform modernization, and ensuring the reliability, performance, and scalability of high volume, business critical systems.
The Expertise You Bring
Deep hands on expertise with COBOL, JCL, VSAM, CICS, batch/online processing, IOM, and enterprise batch scheduling tools.
Extensive experience designing, engineering, and optimizing mission critical mainframe applications.
Advanced SQL proficiency across DB2, Oracle, and/or Postgres with strong data analysis and performance debugging skills.
Proven experience modernizing legacy mainframe systems and integrating with distributed or cloud architectures.
Ability to deliver complex end to end technical solutions, including specifications, integration designs, and documentation.
Strong Agile background with the ability to mentor teams and influence technical direction.
Exceptional analytical, debugging, and cross functional collaboration skills.
Bachelor's degree in Computer Science Engineering, or related field with 8+ years of experience, or a Master's degree with 6+ years of experience (advanced experience preferred).
Skills You Bring
Define and implement application and system level architectures for high performance, resilient mainframe environments.
Design and develop complex applications, frameworks, and subsystems while providing technical leadership across multiple areas.
Recommend development tools, testing frameworks, and engineering methodologies to improve quality and productivity.
Ensure production readiness, quality assurance, performance, and compliance with enterprise standards.
Author comprehensive documentation including architecture diagrams, integration specs, and modernization playbooks.
Lead full project lifecycle planning and execution for large scale, cross platform initiatives.
Identify engineering risks and drive mitigation strategies to ensure system resilience.
Plan and coordinate complex workstreams, managing cross team schedules and dependencies.
Serve as a senior liaison to business and technology partners, translating requirements and resolving technical issues.
Champion production stability by proactively monitoring, diagnosing, and resolving system issues, driving root cause analysis, and ensuring 24/7 reliability for missioncritical brokerage and tax processing workloads.
The Value You Bring
You elevate the stability and performance of Fidelity's tax processing platform through deep mainframe engineering expertise.
You accelerate modernization efforts by integrating mainframe capabilities with distributed and cloud solutions.
You influence architectural strategy by providing seasoned technical leadership and solution guidance.
You enable cross team success by translating complex business needs into scalable, high quality technology solutions.
You ensure reliable delivery and operational excellence through strong engineering practices, documentation, and risk management.
You safeguard production stability by reducing incidents, improving resilience, and ensuring consistent, high quality system performance.
The Hourly Rate for NJ is 50-80/hr based on experience. Placement in the range will vary based on job responsibilities and scope, geographic location, candidate's relevant experience, and other factors.