Jobs in the United States

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Added 8 mins ago
AE
Campus Graduate Masters Full-Time Engineer - 2027 AI Engineer I, Enterprise Technology Services- Sunrise, FL
American Express
Sunrise, FL
- $78,000 to $124,750 USD / year
- Full-time
Support the development, testing, and integration of AI / ML models, LLM integrations, intelligent services, or data retrieval pipelines under guidance.
Added 9 mins ago
Systems Engineer / Principal Systems Engineer (AHT)
Northrop Grumman
Melbourne, FL
2+ years experience applying knowledge of electromagnetic theory, RF propagation, signals processing, e.g., designing, developing, integrating, and/or testing role
Added 9 mins ago
X-Day Offensive Research (XOR) Vulnerability Researcher
JPMorgan Chase
Tampa, FL
Design and execute testing and simulations – such as penetration tests, technical controls assessments, cyber exercises, or resiliency simulations – and contribute to the development and…
Added 52 mins ago
Sr. Specialist, AI CRM Engineering
Bristol Myers Squibb
Princeton, NJ
Participate across the full SDLC lifecycle - design, build, testing, deployment, and issue resolution - for CRM and AI-integrated business requirements.
Added 52 mins ago
Senior Manager, CRM Engineering, Administration & Development - Field Enablement
Bristol Myers Squibb
Princeton, NJ
…assistants, LLM-augmented development workflows, and automated testing into day-to-day engineering practice to accelerate delivery and raise code…
Added 52 mins ago
Margin Java Tech Lead, Senior Vice President
Citigroup
Jersey City, NJ
We’re currently looking for a high caliber professional to join our team as Margin Java Tech Lead – SVP – C14 based in Jersey City or Tampa.
Added 2 hours ago
AI/ML Machine Learning Engineer
Children's Healthcare of Atlanta, Inc.
United States
Skilled at writing robust, production-grade code for application in predictive analytics (e.g.,Python, R, Java, Scala).
Added 2 hours ago
Mainframe Developer
HTC Global Services Inc
Columbia, MO
Job Title:Senior Mainframe COBOL / Natural Developer Position Overview
Added 3 hours ago
IT SPEC (INFOSEC)
Patent and Trademark Office
Alexandria, VA
…projects related to the design, development, modification, testing, installation, implementation, and support of new and existing automated financial and planning / budgeting systems You…
Added 3 hours ago
Software Development Manager, EC2 Control Plane, EC2 S4
Amazon
Arlington, VA
Provide technical direction on system design decisions involving networking protocols, Rust, Java, and HTTP-based multi-tier services, ensuring reliability and performance at scale.
Added 3 hours ago
Technology Consulting - TMT - Forward Deployed Engineer - Sr Manager
EY
Chicago, IL · Houston, TX · Miami, FL · New York, NY · San Antonio, TX · San Francisco, CA · Dallas, TX
Full-stack and infrastructure skills. Advanced hands-on Python or Java, cloud-native services on Azure, AWS, and/or GCP, Kubernetes, Docker, and CI/CD.
Added 3 hours ago
AE
Campus Graduate Masters Summer Internship Program - 2027 Software Engineer, Enterprise Technology Services- Charlotte, NC
American Express
Charlotte, NC
- $24.05 to $63 USD / hour
How software is built and delivered “the Amex Way,” including structured onboarding, developer bootcamp concepts, code quality, testing, and secure engineering practices.
Added 3 hours ago
AE
Campus Graduate Masters Full-Time Engineer - 2027 Software Engineer II, Enterprise Technology Services- Charlotte, NC
American Express
Charlotte, NC
- $89,250 to $150,250 USD / year
- Full-time
How software is built and delivered “the Amex Way,” including structured onboarding, developer bootcamp concepts, code quality, testing, and secure engineering practices.
Added 3 hours ago
AE
Campus Undergraduate Full-Time Engineer - 2027 Software Engineer I, Enterprise Technology Services- Charlotte, NC
American Express
Charlotte, NC
- $78,000 to $124,750 USD / year
- Full-time
How software is built and delivered “the Amex Way,” including structured onboarding, developer bootcamp concepts, code quality, testing, and secure engineering practices.
Added 4 hours ago
AD
Software Dev Engineer II - AMZ27373.1
Amazon Development Center U.S., Inc.
Boston, MA
- $143,700 to $194,400 USD / year
…development cycle, end-to-end, from design, implementation, and testing to documentation, delivery and maintenance. Produce comprehensive, usable software documentation. Evaluate and make…
Added 4 hours ago
Software Dev Engineer III - AMZ26892.1
Amazon.com Services LLC
Miami, FL
…services using object-oriented design, distributed programming, Java and C/C++. Gather business and functional requirements from external and/or internal customers and end-users, and…
Added 4 hours ago
AD
Software Dev Engineer II - AMZ26511.2
Amazon Development Center U.S., Inc.
Santa Clara, CA
- $165,200 to $223,600 USD / year
…development cycle, end-to-end, from design, implementation, and testing to documentation, delivery and maintenance. Produce comprehensive, usable software documentation. Evaluate and make…
Added 4 hours ago
AW
Software Dev Engineer II - AMZ26548.2
Amazon Web Services, Inc.
Cupertino, CA
- $165,200 to $223,600 USD / year
…development cycle, end-to-end, from design, implementation, and testing to documentation, delivery and maintenance. Produce comprehensive, usable software documentation. Evaluate and make…
Added 5 hours ago
Backend Software Engineer
Steampunk
Remote, United States
As a Backend Software Engineer, you will work on modernizing legacy enterprise systems by decomposing monolithic Java and .NET services into cloud-native Python microservices. This role is…
Added 5 hours ago
Backend Software Engineer
Steampunk
Remote, United States
As a Backend Software Engineer, you will work on modernizing legacy enterprise systems by decomposing monolithic Java and .NET services into cloud-native Python microservices. This role is…
Added 5 hours ago
DevSecOps Engineer
Steampunk
McLean, VA
Advocate for software engineering practices such as unit testing, code reviews, full build testing, quality engineering practices and requirements capturing techniques to the teams to…
Added 5 hours ago
DevSecOps Engineer
Steampunk
McLean, VA
Advocate for software engineering practices such as unit testing, code reviews, full build testing, quality engineering practices and requirements capturing techniques to the teams to…
Added 5 hours ago
AE
Campus Graduate Masters Summer Internship Program - 2027 AI Engineer, Enterprise Technology Services- Atlanta, GA
American Express
Atlanta, GA
- $24.05 to $63 USD / hour
Assist with data collection, preprocessing, transformation, and management to enable model training, testing, validation, and evaluation.
Added 5 hours ago
AE
Campus Graduate Masters Full-Time Engineer - 2027 AI Engineer I, Enterprise Technology Services- Atlanta, GA
American Express
Atlanta, GA
- $78,000 to $124,750 USD / year
- Full-time
Support the development, testing, and integration of AI / ML models, LLM integrations, intelligent services, or data retrieval pipelines under guidance.
Added 5 hours ago
AE
Campus Undergraduate Full-Time Engineer - 2027 AI Engineer I, Enterprise Technology Services- Atlanta, GA
American Express
Atlanta, GA
- $78,000 to $124,750 USD / year
- Full-time
Support the development, testing, and integration of AI / ML models, LLM integrations, intelligent services, or data retrieval pipelines under guidance.

HTC Global Services Inc

Mainframe Developer

Columbia, MO, United States

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Job details

Posting language: English
Posted: Oct 31, 2026

Original job description

Job Title:Senior Mainframe COBOL / Natural Developer Position Overview

Work on enhancing a mission-critical mainframe accounting platform by developing new pooled-account functionality within an established z/OS environment. This role involves extending existing Enterprise COBOL and Natural applications, implementing financial accounting functionality, and ensuring accurate transaction processing, reconciliation, and reporting.

The position requires a developer who can navigate complex legacy applications, trace undocumented logic, and deliver reliable enhancements without disrupting existing production operations.

What You'll Do / Key Responsibilities

Analyze existing account master, posting, and balance-maintenance programs to identify where new account functionality must be incorporated and document findings.
Design and develop new account functionality, including master file and table structures, account opening and closing, participant linkage, sweep and reverse-sweep logic, allocation, interest apportionment, and closing balance derivation.
Modify batch COBOL programs and JCL and extend nightly and month-end processing cycles while maintaining agreed batch-window limits.
Enhance audit trails, exception reporting, and reconciliation controls in coordination with accounting stakeholders.
Develop test data, unit and regression test packs, and parallel-run comparisons against current production output.
Investigate and explain differences identified during testing.
Support implementation, conversion of in-scope existing accounts, and early-life production runs, including on-call support during initial cycles.
Prepare program documentation, data-flow notes, and runbook updates for ongoing production support.

Required Qualifications

5+ years of Enterprise COBOL development experience in a z/OS environment.
5+ years of experience with NaturalOne.
3+ years of JCL development and production support experience.
3+ years of experience with financial/accounting systems development or support, including double-entry posting, balance/accrual maintenance, value dating, reconciliation, and month-end closeouts in a regulated environment.
3+ years of experience working with Adabas and VSAM.
3+ years of experience tracing undocumented logic through copybooks, call chains, and job streams.

Preferred Qualifications

Experience with cash management, account pooling, sweeps, or treasury applications.
Experience with CA-7 scheduling and batch operations.
Experience with REXX, Python, or Java.

Additional Skills

Experience with mixed-estate integration, including calling between COBOL and Natural and exposing mainframe functionality through z/OS Connect, IBM MQ, or REST services.
Experience with CA-7 batch-window analysis and performance tuning.
Experience with REXX or CLIST for tooling, and Java or Python for data comparison and migration activities.
Knowledge of notional and physical pooling, cash concentration, sweeps, and intercompany allocation.
Ability to take specifications from analysis through production implementation with limited supervision.
Strong written communication skills, including the ability to explain technical changes to auditors, business analysts, and developers.
Degree in computer science or a related field, or equivalent practical experience.

What Makes HTC A Great Place To Build Your Future

HTC Global Services wants you to join our team. Come build new things with us and advance your career. At HTC Global, you’ll collaborate with experts, work alongside clients, and be part of high-performing teams driving success together. You’ll have long-term opportunities to grow your career and develop skills in the latest emerging technologies.

At HTC Global Services, our employees have access to a comprehensive benefits package. Benefits can include Group Health (Medical, Dental, and Vision), Paid Time Off, Paid Holidays, 401(k) matching, Group Life and Disability insurance, Professional Development opportunities, Wellness programs, and a variety of other perks.

Our success as a company is built on inclusion and diversity. HTC Global Services is committed to providing a workplace free from discrimination and harassment, where every employee is treated with dignity and respect. We celebrate differences and believe that diverse cultures, perspectives, and skills drive innovation and success. HTC is an Equal Opportunity Employer and a proud National Minority Supplier. We seek to empower each individual, fostering an environment where everyone feels valued, included, and respected.

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More about this job

Skills

Transaction processing
Opening and closing procedures
COBOL
JCL
Reporting
Documentation
Cash handling
Scheduling
Python
Oracle Java
Communication skills
Computer science

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