Software Systems Engineer

axiomspace; Houston (TX); On-site; USD 120,000 - 180,000; Full time

Job summary

Axiom Space in Houston seeks a resilient Software Systems Engineer to own software systems for the Commercial Space Station program. You will define, integrate, and verify software across the lifecycle in a MBSE-driven environment, coordinating with multi-disciplinary teams in a fast-paced setting.

Responsibilities include requirements management, interfaces, verification planning, and end-to-end system integration. A strong track record in MBSE and aerospace experience is highly valued.

Qualifications

• Demonstrated experience authoring and managing software/system requirements (functional, performance, safety, and interface).
• Experience maintaining bidirectional requirements traceability across lifecycle stages.
• Experience defining and managing interfaces (ICDs) and supporting integration activities.
• Experience planning and executing verification activities (test, analysis, inspection, demonstration).
• Proficiency with at least one requirements management tool (e.g., Jama, DOORS, or Innoslate).
• Hands-on MBSE experience using SysML in at least one MBSE tool (e.g., Cameo, Rhapsody, Innoslate).
• Working knowledge of JIRA/Confluence and project/risk management practices.

Responsibilities

• Author software and system requirements using a model-based requirements approach.
• Maintain bidirectional requirements traceability across the full lifecycle.
• Lead requirements reviews, change control boards, and impact assessments.
• Define interfaces (ICDs), message schemas, timing budgets, and failure behaviors.
• Participate in software architecture trades: partitioning, redundancy, data flows, modes/states.
• Collaborate with avionics, network, FPGA, and hardware teams for end-to-end integration.
• Plan and author verification methods and define testable acceptance criteria.
• Support integration activities across SIL/HIL environments and labs.
• Support safety analyses and derived requirements, including hazard analysis and fault response.
• Communicate project progress and issues to stakeholders and leadership.
• Implement and maintain agile project management methodologies.
• Perform additional duties as assigned.

Skills

Software requirements

Traceability

Interfaces and architecture

MBSE (SysML)

JIRA/Confluence

Problem solving in fast-moving env

Education

Bachelor's degree in Aerospace, Electrical, Systems, CS or related field

Tools

Jama

DOORS

Innoslate

SysML tools (Cameo, Rhapsody)

Job description

Axiom Space is a human space exploration company, building era-defining space infrastructure and delivering technology-driven solutions that will empower civilization to transcend Earth. Beginning with Axiom Station, successor to the International Space Station, the company is pioneering a next-generation orbital settlement that will foster groundbreaking innovation and research in microgravity and drive the global space economy of tomorrow. Today, guided by the vision of leading humanity's expansion off planet, Axiom Space is the principal provider of commercial human spaceflight services and developer of advanced spacesuits for the Moon and beyond. For more information about Axiom Space, visit www.axiomspace.com.

Axiom Space fosters a work environment inclusive of all perspectives. We are the pioneers of commercial space, leading the transformation of low-Earth orbit into a global space marketplace.

POSITION SUMMARY

Since Axiom Space is a very complex work environment, we are looking for a resilient, high-energy Software Systems Engineer to support our Commercial Space Station program in Houston, TX. This individual will own the definition, integration, and verification of software systems supporting space operations and station infrastructure, spanning requirements, architecture, and interface work across the full software development lifecycle. The role operates within a standards-driven, MBSE-based development environment alongside multidisciplinary hardware, software, and avionics teams, and requires strong systems thinking, clear cross-disciplinary communication, and comfort operating in ambiguous, fast-moving environments.

KEY DUTIES & RESPONSIBILITIES

• Author software and system requirements (functional, performance, safety, cybersecurity, interface) using a model-based requirements approach
• Maintain bidirectional requirements traceability across the full lifecycle: ConOps -> system -> software -> design -> test
• Lead requirements reviews, change control boards, and impact assessments
• Define interfaces (ICDs), message schemas, timing budgets, and failure behaviors
• Participate in software architecture trades: partitioning, redundancy, data flows, and modes/states
• Collaborate with avionics, network, FPGA, and hardware teams to ensure end-to-end system integration
• Plan and author verification methods (test, analysis, inspection, demonstration) and define testable acceptance criteria
• Support integration activities across SIL/HIL environments, benches, labs, and flight/field test readiness
• Support safety analyses and derived requirements, including hazard analysis, fault response, and criticality/DAL determinations
• Communicating project progress, status, and potential issues to stakeholders and leadership
• Implementing and maintaining agile project management methodologies throughout the project lifecycle
• Perform additional job duties as assigned

QUALIFICATIONS

U.S. citizen or permanent resident; ability to pass a pre-employment background check and drug screening

• Demonstrated experience authoring and managing software/system requirements (functional, performance, safety, and interface)
• Experience maintaining bidirectional requirements traceability across lifecycle stages
• Experience defining and managing interfaces (ICDs) and supporting integration activities
• Experience planning and/or executing verification activities (test, analysis, inspection, demonstration)
• Proficiency with at least one requirements management tool (e.g., Jama, DOORS, or Innoslate)
• Hands-on experience applying Model-Based Systems Engineering (MBSE), using SysML or an equivalent modeling language, in at least one MBSE tool (e.g., Cameo, Rhapsody, Innoslate)
• Working knowledge of JIRA/Confluence and project/risk management practices
• Bachelor's degree in Aerospace, Electrical Engineering, Systems Engineering, Computer Science, or another technical/engineering field; 10+ years of systems engineering experience on software-intensive programs, or an equivalent combination of education and experience
• Track record of making things happen in ambiguous, fast-moving environments
• Uses good judgement to problem-solve proactively, positively impacting hard challenges
• Demonstrated organization skills to meet tight deadlines with high quality results

Preferred Qualifications

• Experience in aerospace or spaceflight systems, ideally human-