Role & seniority: Experienced Software Test Engineer (HIL focus) in safety-critical avionics.

Stack/tools: Embedded/system test environment; hardware-in-the-loop (HIL) systems and test rigs; C development context; scripting/test automation (e.g., Python); strong documentation tooling. Onsite collaboration with a cross-functional team (requirements, developers, testers).

Top 3 responsibilities

Plan, execute, and document structured testing activities to ensure quality, reliability, and compliance.
Contribute to continuous improvement of QA processes within a safety-critical avionics project.
Collaborate with cross-functional teams to validate software in embedded/hil environments and maintain test artifacts.

Must-have skills

Experience as a Software Tester in avionics, automotive, or other safety-critical embedded domains.
Proficiency with hardware-in-the-loop (HIL) systems and test rigs.
Ability to develop and execute structured test plans and test cases.
Strong documentation and reporting capabilities.
Understanding of industry standards/regulatory compliance and agile collaboration.

Nice-to-haves

Familiarity with DO-178C avionics processes.
Experience with agile methodologies.
Certifications in software testing or related fields.
Experience with test automation frameworks or scripting (Python).
Familiarity with other test paradigms (SIL, MIL, MLI).

Location & work type: Huskvarna, Sweden. Onsite 5 days/

Full Description

AddanEx JOB POSTING

Title: Experienced HIL Tester

Location: Huskvarna, Sweden (Onsite 5 days per week)

Type: Contract

Start Date: ASAP

Duration: 6 Months + Long term Extensions possible

Utilisation: 40 Hours per week

Languages: English (Swedish is a bonus)

Your role

As a Software Test Engineer, you will play a key role in ensuring the quality, reliability, and compliance of software used in safety-critical systems. You will be responsible for planning, executing, and documenting structured testing activities while contributing to the continuous improvement of quality assurance processes.
This is a key position within a safety-critical operation, offering the opportunity to contribute to advanced technology projects within a highly competent and experienced team.
You will be part of a team that develops an avionics project for a civilian aircraft, comprised of C developers, testers, requirements specialists and others.

Your profile

We are looking for an experienced Software Test Engineer with strong analytical skills and a structured approach to quality assurance. You are detail-oriented, proactive, and comfortable working both independently and in close collaboration with colleagues from different disciplines.
To thrive in this role, you bring hands-on experience as a software tester within avionics, automotive, or other embedded systems environments. You feel confident working with hardware-in-the-loop setups. You have a solid understanding of modern testing methodologies and tools, and you are comfortable working with both high-level and low-level testing activities. Strong documentation skills are essential, and experience with test automation tools or scripting languages is highly valued. We believe you approach challenges with curiosity, structured problem-solving skills, and a genuine commitment to delivering high-quality solutions. You enjoy contributing to a supportive, thoughtful, and quality-driven development environment.

Requirements

Experience as a Software Tester within avionics, automotive, or other safety-critical industries centred around embedded development
Experience working with safety-critical software
Experience developing and executing structured test plans and test cases
Experience with hardware-in-the-loop (HIL) systems and test rigs
Strong documentation and reporting skills
Understanding of industry standards and regulatory compliance processes

Software Tester