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Senior Software Engineer - Mainframe

Rocket Software Open · verified Oct 24, 2026
Vilnius Full-time Senior Software Engineering

At a glance

Senior Software Engineering role at Rocket Software. Vilnius · full-time · €49,000–€83,300 base.

SalaryStated by Rocket Software
€49,000 – €83,300
Base salary for this role, in EUR per year, as published in the posting.
RoleSoftware Engineering
SenioritySenior
LocationVilnius
EmploymentFull-time
Base pay€49,000–€83,300
PostedAug 6, 2026 · 2mo ago
Role brief

techroles summary, based on the employer's posting.

What you'll do

  • Shape and build software features for tools that monitor IBM z/OS storage, including fixing defects and improving existing functionality
  • Own component-level design decisions, review proposed designs, and adapt software to make use of platform capabilities
  • Break larger features into tasks, estimate effort and risks, and keep competing work moving with limited guidance
  • Resolve customer issues with Support and sales engineers, and explore the broader problem behind each technical question
  • Test, document, and deliver completed work, while helping junior engineers grow and preventing recurring problems

What you bring

  • Senior-level software engineering experience, backed by a track record of delivering software in practice
  • Proficiency building and debugging IBM z/OS Assembler applications
  • Proficiency developing and debugging in C or C++
  • A bachelor's degree or equivalent qualification

Who this fits

This role suits a senior engineer comfortable owning component design and working across teams, with a willingness to coach junior colleagues. The work centers on IBM z/OS storage monitoring and includes customer issue resolution. The position is in Vilnius, with travel listed at zero to ten percent.

From the employer

It's fun to work in a company where people truly BELIEVE in what they're doing!

Job Description Summary:

The Senior Software Engineer designs, develops, troubleshoots, debugs, and sets the direction for the design and implementation of software features/functionality/enhancements, correction of defects, and/or the creation of new products. Develops Enterprise Program Products for monitoring IBM z/OS Storage environments. Determines software’s compatibility with hardware and/or influences software's design in relation to hardware.

Essential Duties and Responsibilities:

  • Review and provide feedback on designs.

  • Takes ownership of the design and development of features within their component.

  • Recognizes and practically solves for anti-patterns.

  • Good understanding of how his/her work aligns with high-level use cases and team deliverables.

  • Define (more than a feature, less than a product) a component that fits into an architecture.

  • Describe and defend design decisions for components owned by the team.

  • Optimize software design to leverage platform capabilities.

  • Acts as the technical subject matter expert for a product domain.

  • Quantify and communicate work estimates and risks to direct management.

  • Handle multiple competing priorities with minimal help.

  • Understand features as a whole and able to break down larger stories and features into tasks.

  • Familiar with most of the technologies we focus on and what markets they target.

  • Takes ownership of customer issues and effectively communicate with Support/SEs to resolve field questions/issues.

  • Discuss with customers what larger concerns and problems they are trying to solve, over and above the immediate technical concerns.

  • Willingness to teach and grow junior team members.

  • Excellent listening skills.

  • Effectively works within the team and across teams.

  • Ensures all tasks are completed thoroughly and that any work done is tested, unit tested, documented, and ready for customers.

  • Takes identified problems and concerns and creates a plan to fix the problem and prevent it from occurring again.

  • Follows through on all tasks.

  • Reliably delivers expected work products and outcomes.

  • Imparts a sense of urgency on junior team members.

Required Qualifications:

  • Experience in software engineering at a senior level

  • Proven track record of software development in the real world

  • Proficient in IBM z/OS Assembler (HLASM) development and debugging

  • Proficient in C/C++ development and debugging

Preferred Qualifications:

  • Familiar with IBM z/OS operating systems environments and facilities (JES, ISPF)

  • Familiar with IBM z/OS Storage Management

  • Familiar with IBM High Level Assembler (HLASM) development and debugging

  • Can-do attitude

  • Curious and asks "why"

Education:

Bachelor's degree or equivalent.

Travel Requirements:

0 - 10%

...

What Rocket Software can offer you in Vilnius:

  • Health Insurance from Day 1: Choose from 3 great options!

  • Generous Time Off: Unlimited annual leave holidays, plus Juneteenth as an extra day off for everyone.

  • Rocket enhanced parental leave benefit.

  • Employee Assistance Program – Digital Courses & Meditations, Certified Personal Coaching & Personal Therapy sessions.

  • Workcation Policy: Enjoy the flexibility to work from a vacation spot, combining work and leisure.

  • Choose your own hybrid/remote work model.

  • Tuition Reimbursement and Certificate Reimbursement Program opportunities.

The base salary range for this role is €49,000.00 - €83,300.00 /year. Exact compensation may vary based on skills, experience, and location.

Salary range applies only to candidates in Lithuania

Salary offer for the candidate is determined based on the predefined salary ranges for the position and depends on the level of competence and experience of the candidate.

Rocket Software Inc. is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. Rocket Software Inc. is also committed to compliance with all fair employment practices regarding citizenship and immigration status.


At Rocket Software, we believe AI is a critical enabler of innovation and productivity. All Rocketeers are expected to actively leverage AI-powered tools and technologies, where appropriate, to enhance efficiency, improve decision-making, and deliver greater impact in their roles. Embracing continuous learning and the responsible use of AI is an essential part of how we work.


As part of our commitment to a safe and trustworthy workplace, we include background and reference checks in our hiring process.


Rocket is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you need special assistance or an accommodation while seeking employment, please call: 781-577-4321 or send an email to people@rocketsoftware.com. We will make a determination on your request for reasonable accommodation on a case-by-case basis.


If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

Opportunity

Software Engineering work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Software Engineering€40k+

Find me work

By the team behind techroles.

Find me work
Opportunity

Software Engineering work from LinkedIn, X, Reddit and Upwork, in one list.

Each morning you get everything that fits, strongest first.

Find me work

By the team behind techroles.