Senior Mainframe Developer - HLASM

Dynatrace; United States; On-site; USD 161,000 - 241,000; Full time

Benefits offered by this job

Health insurance

Dental insurance

Life insurance

STD

LTD

401K

PTO

Job summary

Dynatrace is redefining mainframe observability by bringing AI-driven insights to z/OS, CICS and HLASM. We’re looking for engineers who understand systems at the instruction level and who care about performance, dumps, and traces.

You’ll build instrumentation inside CICS and z/OS, push HLASM limits, and design features used by the world’s largest enterprises. Join a small, elite team focused on deep expertise over process.

Qualifications

• 7+ years of real-world HLASM experience.
• Deep expertise in z/OS internals, CICS internals, systems programming and runtime behavior.
• Strong hands-on experience with CICS.
• Daily proficiency with JCL, SDSF, and USS.
• Proven ability to analyze dumps, traces, and performance bottlenecks.
• Working knowledge of COBOL, PL/I, or C for testing and debugging.

Responsibilities

• Build low-level, high-performance instrumentation inside CICS and z/OS.
• Push the limits of what’s possible with HLASM.
• Design and ship features used by the largest enterprises on the planet.
• Diagnose complex behavior using dumps, traces, and deep system insight.
• Deliver code that runs in mission-critical environments where overhead is unacceptable.
• Work directly with a small, elite team of highly experienced engineers.

Skills

HLASM

z/OS internals

CICS internals

JCL

SDSF

USS

performance analysis

COBOL/PL/I/C

Tools

DB2

MQ

WebSphere WAS

z/OS Connect

Job description

Your role at Dynatrace

Let’s be clear: this is not a typical mainframe role.

At Dynatrace, we’re redefining what’s possible on the mainframe - bringing AI-driven observability to the most critical systems in the world. Our OneAgent runs in millions of environments, and we’re going deeper into z/OS CICS internals to deliver visibility that simply doesn’t exist anywhere else. We’re looking for engineers who don’t just write code, they understand how systems actually work at the lowest levels. If you live in HLASM, read dumps like a second language, and care about performance down to the instruction level, keep reading.

What You'll Own

• Build low-level, high-performance instrumentation inside CICS and z/OS
• Push the limits of what’s possible with HLASM
• Design and ship features used by the largest enterprises on the planet
• Diagnose complex behavior using dumps, traces, and deep system insight
• Deliver code that runs in mission-critical environments where overhead is unacceptable
• Work directly with a small, elite team of highly experienced engineers
• Raise the bar—technically and operationally

Why This Role Stands Out

• You’ll work on problems most engineers never get access to
• Your code will run in the most demanding production environments in the world
• You’ll join a team that prioritizes deep expertise over process
• You’ll help shape the future of AI-powered mainframe observability

This Is For Engineers Who

• Obsess over performance, efficiency, and control
• Want to go deeper than application-level development
• Take pride in solving problems most people don’t even understand

What will help you succeed

• 7+ years of real-world HLASM experience
• Deep expertise in z/OS internals, CICS internals, systems programming and runtime behavior
• Strong hands-on experience with CICS
• Daily proficiency with JCL, SDSF, and USS
• Proven ability to analyze dumps, traces, and performance bottlenecks
• Working knowledge of COBOL, PL/I, or C for testing and debugging

Nice To Have

• Experience with DB2, MQ, networking, CTG, security, or WebSphere (WAS)
• Familiarity with z/OS Connect or modern hybrid mainframe architectures
• Some Java experience
• AI experience

Compensation And Rewards

DOE, salary $161K - $241K, plus Health, Dental, Life, STD, LTD, 401K, PTO. Total compensation may vary depending on candidate experience/education and location.

Equal Employment Opportunity

All your information will be kept confidential according to EEO guidelines.

We offer competitive compensation, company-sponsored premium benefits, medical, dental, vacation/holidays, company matching 401(k) Plan, etc.

Dynatrace is an Equal Opportunity/Affirmative Action employer.

All qualified applicants will receive consideration for employment without regard to race, sex, color, gender identity, religion, national origin, ancestry, citizenship, physical abilities, age, sexual orientation, creed, disability status, veteran status, pregnancy, genetic status, or any other characteristic protected by law.

If your disability makes it difficult for you to use this site, please contact [e-mail].

Dynatrace participates in E-Verify, participant information in English and Spanish.

Right to work information in English and Spanish.

EEO is the Law.