Senior Software Engineer- Mainframe/Assembler

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

Benefits offered by this job

Hybrid Working Model

One-time Hybrid Work Payment

Employee Assistance Program

Medical, Dental, Vision Insurance

Job summary

Software AG in Denver, CO (Hybrid) is seeking an experienced senior assembler developer for IBM mainframe assembler in the z/OS environment to support and enhance our Adabas-related products.

Responsibilities include designing, implementing, and optimizing high-performance assembler code, debugging, testing new features, and guiding QA and documentation. Candidates should have 7+ years of experience with IBM z/Architecture and z/OS, and enjoy teamwork across distributed sites.

Qualifications

• 7+ years of professional software development experience with IBM z/Architecture 31-bit and 64-bit assembler.
• Comprehensive knowledge of IBM z/OS architecture, software and utilities.
• Strong focus on code quality and performance.
• Excellent time management and ability to handle priorities.
• Strong analytical, debugging and decision-making abilities.
• Excellent interpersonal and written communication skills.
• Experience with zIIP, zEDC, Sysplex is a plus.
• Experience with network protocols such as TCP/IP, CTCA, FCTC, XCF, VTAM is a plus.
• Ability to work in distributed teams.
• Self-motivated with a 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.
• 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.

Skills

IBM z/Architecture assembler

IBM z/OS knowledge

Code quality & performance

Analytical debugging

Communication skills

Team collaboration

Self-motivated learner

Network protocols (TCP/IP etc.)

zIIP / zEDC / Sysplex (plus)

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.

Location- Denver, CO (Hybrid)

Be you, join us

Responsibilities

• Design, implement, and optimize software written in IBMmainframe 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: 10/30/2026

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 workshare 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.