Senior z/OS Systems Programmer

Ensono; Hyderabad; On-site; INR 2,500,000 - 4,500,000; Full time

Job summary

Ensono in Hyderabad seeks a Senior z/OS Base System Engineer to lead and advance our core mainframe OS environment. You will design, implement, and optimize z/OS services, ensuring high availability and reliability across mainframe clusters, while mentoring engineers and influencing architectures.

You will collaborate with global teams and stakeholders in an agile context, applying advanced OS concepts, tuning, and observability to maintain production health and performance.

Qualifications

• 10+ years’ experience in z/OS systems programming or a similar senior role.
• Deep knowledge of z/OS internals and architecture with core components.
• GDPS operations and Coupling Facility management for high availability.
• Hands-on SMP/E packaging, installation, and upgrades to z/OS.
• Proficiency in REXX, JCL, TSO/ISPF; knowledge of Assembler a plus.
• Strong performance tuning and use of system utilities.
• L3 support experience for mainframe OS infrastructure.
• Independent, proactive work style with strong documentation skills.
• Clear communication to stakeholders; leadership in architecture.

Responsibilities

• Design, develop, and improve core platform services on z/OS.
• Ensure quality, security, reliability, and compliance of OS solutions.
• Build observability, monitor health, and perform root-cause analysis.
• Monitor and optimize ParallelSysplex and Coupling Facility configurations.
• Make critical technical decisions and mentor junior engineers.
• Collaborate with cross-functional teams and leadership.

Skills

z/OS internals

GDPS mastery

SMP/E

REXX

JCL/TSO/ISPF

Assembler (plus)

z/OS performance tuning

Level 3 support

Independent working

Documentation & change management

Leadership & mentoring

English communication

German language (plus)

Job description

Ensono is a hybrid IT services provider that sees a world in transformation. We understand the world of business has become more complex, layered, and interdependent because we’re enabling the IT infrastructure for that transformation. Our clients are some of the most innovative and forward-thinking companies in the world and we help keep their businesses thriving. With nearly 50 years of experience, we optimize and modernize IT infrastructure by amplifying the power of mainframes and mid-range servers with the agility of cloud. Check us out atwww.ensono.com.

Job Role:

Asa Senior z/OS Base System Engineer, you will act as a key technical leader inmaintainingand advancing our core mainframe operating system environment.We’relooking for an experienced z/OS Systems Software Engineerto:design, develop, and improvethe core digital platform services we provide on z/OS. You willapply a broad range of software engineering practices, from analyzing system needs and developing new features to automated testing and deployment.You’llensure thequality, security, reliability, and complianceof our operating system solutions by implementing both functional and non-functional requirements.You’llhelpbuild observabilityinto our systems,monitorproduction health, resolve incidents, and perform root-cause analysis to improve stability. In addition, you willmonitorandoptimizeParallelSysplexand Coupling Facility configurations, ensuring high availability across mainframe clusters. As a senior engineer, you will make criticaltechnical decisionsand articulate your solution designs and proposals to stakeholders and technical leadership, serving as a trusted advisor on mainframe systems architecture. You will alsoshare knowledge andexpertisewith colleagues, mentor junior engineers, and contribute to our engineering culture via code reviews, technical presentations, and participation in internal communities.

Your team:

In our agile operating model, crews are aligned to larger products and services that fulfill business needs through multiple autonomous pods.

You’llbe working in the Mainframe Platform Core Services team, a global crew responsible for mainframe infrastructure services and innovation. You will collaborate closely with other specialized mainframe engineering teams (e.g., DB2 Engineering and Online Systems Engineering for CICS/MQ) to deliver end-to-end reliable solutions. This role involves frequent interaction with operational teams across geographies (such as Switzerland, USA) to ensure alignment of system enhancements and operations. As a senior member,you’llofteninterface withlead engineering boards and stakeholders to align mainframe platform improvements with business goals.

Mandatory Skills

• You have10+ years’ experience in z/OS systems programmingor a similar senior engineering role. Your qualifications include:
• Deep knowledge of z/OS internals– Expert skills inz/OS operating system architecture, design, and implementation, with mastery of core z/OS components and subsystems.
• ParallelSysplex& Coupling Facility mastery– Comprehensive experience inGeographically Dispersed ParallelSysplex(GDPS) operations and Coupling Facility management to ensure high availability and minimal outages.
• SMP/E and system installation–Hands-onexpertisewith SMP/Epackaging, installation, and maintenance of z/OS software and operating system; capable of planning and executing complex system upgrades and ensuring OS currency (experience up to z/OS 3.1 preferred).
• Programming & Scripting– Proficiency inREXX, TSO/ISPF, JCL, and other system programming languages; familiarity withAssemblercoding is a plus.
• Performance & Tools– Stronganalytical skillsand thorough knowledge of z/OS performance tuning and system utilities; experience with IBM and non-IBM system management tools, monitoring, and problem determination utilities.
• Problem Management & Support– Proven experience providingLevel 3 supportfor mainframe OS infrastructure, including diagnosing complex systemissuesand devising permanent solutions.
• Independent and Proactive– A self-driven engineer capable of workingindependently, taking initiative inidentifyingsystem improvements, and proactively addressing potential issues or vulnerabilities.
• Change Management & Documentation– Good understanding ofchange management processes, with an ability to write clear system design and architecture documents (e.g., network and system design concept documents) and to guide technical changes from concept through production.
• Continuous Learning & Strategic Thinking– Eagerness tolearnnew technologiesand practices, reusing strategic platforms and standards; adept at evaluating options and makinglong-term architectural decisionsthat ensure sustainability.
• Communication & Leadership–Strong communication skillsare essential: fluent English (written and spoken) ismandatory, and German language skills are a plus. You are comfortable presenting complex technical decisions to stakeholders and senior management. You alsodemonstrateleadership through mentoring and by influencing architecture and engineering best practices across the mainframe community.

Shift Timing- 1:30 PM to 10:30 PM

We are an equal opportunity employer. All qualified applicants will be considered for employment without regard to caste, colour, creed, religion, gender, gender identity, sexual orientation, age, disability, HIV status, or any other status protected by law. Candidates with disabilities who require accommodations during the recruitment process are encouraged to contact our Talent Acquisition team to place a request.