Software Engineer (Senior) - TS/SCI with Polygraph Required

Catalyst Operations & Analytics; Österreich; On-site; EUR 90,000 - 130,000; Full time

Job summary

Catalyst Operations & Analytics seeks a Senior Software Engineer to lead the design, development, and delivery of complex software systems in an Agile environment. You will own significant portions of the SDLC—from requirements analysis and design through coding, integration, and testing—and you will mentor junior engineers to raise the team's technical capabilities.

The role emphasizes evaluating software architectures, ensuring performance and security, and presenting technical solutions to

Qualifications

• Bachelor's degree or higher in a technical field with 7-11 years of software engineering experience.
• Master's degree with 5-9 years experience also acceptable in lieu of a degree.
• Strong proficiency in one or more modern programming languages and full SDLC experience.

Responsibilities

• Lead design, development, and delivery of complex software systems within Agile teams.
• Review and mentor junior/mid-level engineers; provide technical leadership and guidance.
• Ensure performance, security, and reliability standards across deployed systems.

Skills

Java

Python

C/C++

JavaScript

SDLC

Agile/Scrum

Version control

DevOps/CI-CD

Windows/Linux

Technical writing

Mentorship

Education

Bachelor's degree

Master's degree (optional)

Tools

Git

CI/CD tools

Job description

Position Summary

Senior Software Engineers lead the design, development, and delivery of complex software systems in support of the customer's requirements. Senior Software Engineers take ownership of significant portions of the software development lifecycle — from requirements analysis and design through coding, integration, and testing — while operating within Agile development teams. Senior Software Engineers apply sound engineering judgment to resolve difficult technical problems, evaluate design trade-offs, and help ensure delivered systems meet performance, security, and reliability standards. Senior Software Engineers are expected to review the work of less experienced engineers and provide technical mentorship

Requirements

US Citizenship and TS/SCI with Polygraph (no exceptions)

Education/Experience Requirements:

• Bachelor's degree and 7-11 years of relevant professional software engineering experience (Master's degree and 5-9 years also acceptable); additional relevant experience may be considered in lieu of a degree
  

Required Skills:

• Strong proficiency in one or more modern programming languages (e.g., Java, Python, C/C++, JavaScript)
• Demonstrated experience across the full software development lifecycle (SDLC), including requirements analysis, design, coding, integration, testing, and deployment
• Experience working within Agile/Scrum development teams and ceremonies
• Experience with version control and configuration management tools
• Experience developing on Windows and/or Linux operating systems
• Experience with DevOps practices, CI/CD pipelines, and test automation
• Demonstrated ability to evaluate software architecture and technical trade-offs
• Strong critical thinking, technical writing, and oral communication skills, including the ability to present technical solutions to customers
• Senior positions review and guide the work of Junior and Mid-Level engineers