Senior Software Engineer- Mainframe/Assembler (Adabas & Natural)

Software AG; Denver (CO); Hybrid; USD 130,000 - 145,000; Full time

Benefits offered by this job

Hybrid work model

Remote work share up to 60%

One-time home office stipend

401(k) with 5% match

Medical, dental, vision

Job summary

Software AG in Denver, CO, is seeking an experienced senior assembler developer to design, implement, and optimize IBM mainframe assembler code for z/OS environments. You will analyze, debug, and develop high‑performance code for our mainframe product family and contribute to testing and documentation.

Join a global leader focusing on performance and reliability. The role offers a hybrid work model, collaboration across distributed teams, and a competitive base salary plus a 10% discretionary

Qualifications

• 7+ years of professional software development with IBM z/Architecture 31‑bit and 64‑bit assembler instructions.
• Comprehensive knowledge of IBM z/OS architecture, software and utilities.
• Commitment to high code quality and performance.
• Strong time‑management skills and ability to manage priorities.
• Ability to combine judgment, experience, analytical and debugging skills.
• Excellent interpersonal and writing skills.
• Useful experience with zIIP, zEDC, Sysplex.
• Experience with Network Protocols (TCP/IP, CTCA, FCTC, XCF, VTAM).
• Ability to work in a geographically distributed team.
• Self‑motivated and continuous learning mindset.

Responsibilities

• Design, implement, and optimize IBM mainframe assembler code in the z/OS environment.
• Analyze, debug, and develop high‑performance code for products.
• Implement and test new code or enhancements for existing products.
• Provide guidance and collaboration for QA and documentation.
• Own issues and proactively test products to avoid problems.
• Contribute creative ideas for product features.

Skills

Mainframe assembler

z/OS technology

Code optimization

Debugging

Time management

Interpersonal skills

Network protocols

Distributed teamwork

Self-motivation

Tools

z/OS

Sysplex

zIIP

TCP/IP

Job description

Software AG's products enable companies to convert their data into value. As a data pioneer, Software AG has been convincing thousands of market‑leading companies worldwide with customer‑oriented innovations for over 50 years.

Mainframe Adabas is the flagship product for Software AG. It is well known for its extremely high performance and reliability, with online transaction processing and is used to run customers’ business and company‑critical applications. Even after more than 50 years, Software AG Adabas continues to develop and adapt to new industry standards, business methods, and technologies.

The Mainframe Adabas family of products has a diverse portfolio. Support for high availability technology; IBM’s SYSPLEX Technology and zIIP are key extensions to the DBMS. Additional add‑on products include replication, monitoring, network, Auditing, security, large memory and various other optimizations.

For this position, we are looking for an experienced and motivated senior assembler developer who can support existing products or develop solutions for our customer base.

Be you, join us.

Location: Denver, CO (Hybrid)

Responsibilities

• Design, implement, and optimize software written in IBM mainframe assembler in the z/OS environment.
• Analyze, debug, and develop high‑performance code for various products.
• Implementation and testing of new code or enhancements for existing products.
• Actively provide guidance, direction, and collaboration for QA and documentation.
• Take ownership and ensure proactive analysis and testing of products to avoid problems.
• Contribution of creative and innovative ideas for products and features.

About You

• 7+ years of professional software development experience with IBM z/Architecture 31‑bit and 64‑bit assembler instructions.
• Comprehensive knowledge and experience with IBM z/OS technology (architecture, software, and utilities).
• Commitment to a high level of code quality and performance.
• Strong time‑management skills, and the ability to manage complexities and competing priorities.
• Ability to combine judgment, experience, analytic and debugging skills, and business sense to make sound decisions.
• Very good interpersonal/communication skills with sound writing skills.
• Useful to have experience with such technologies as zIIP, zEDC, Sysplex.
• Useful to have Network Communication Protocol experience (e.g. TCP/IP, CTCA, FCTC, XCF, VTAM).
• Ability to work in a diverse and geographically distributed team.
• Self‑motivated, self‑developing and learning mindset.

Application Deadline: 07/31/2026

What’s in it for you?

Compensation

The annual base salary range for this position is $130,000 - $145,000.

This position is also eligible for a 10% discretionary annual bonus in accordance with relevant plan documents and award agreements.

Benefits

• Company paid holidays, sick leave, and vacation time.
• Paid family leave and other leaves of absence.
• Community Service Day.
• Medical, dental, vision, FSA/HSA, life insurance and pet insurance.
• 401(k) plan with up to 5% employer match.
• Wellness program.
• Enjoy time and location flexibility with our hybrid working model, which allows a remote work share of up to 60%.
• Set yourself up for success in your new role by upgrading your home office space using your one‑time hybrid work payment.
• Lean on the employee assistance program for support during some of life’s most common but difficult challenges.

At Software AG we are committed to providing an environment of mutual respect and fairness where equal employment opportunities are available to all applicants and employees without regard to race, colour, religion, gender, pregnancy, national origin, age, physical and mental disability, marital status, sexual orientation, gender identity, and any other characteristic protected by applicable law.

We believe that diversity, equity, and inclusion is critical to our success as a global company, and we seek to recruit, compensate, develop, promote, and retain the most talented people from a diverse candidate pool.

To all recruitment agencies: Software AG does not entertain unsolicited CVs without prior approval from Software AG's Talent Acquisition Team. Kindly refrain from sending CVs to our job’s alias, Software AG employees, or any other organizational location without explicit consent. Software AG assumes no responsibility for any fees associated with unsolicited CVs.