Application software engineer Jobs in Sion

About H55 H55 is the electric aviation pioneer born from Solar Impulse, the first aircraft to fly around the world on solar energy alone.

Our mission is to make air transport clean, safe, and affordable by building the certification-grade energy storage systems the industry needs to scale.

What we build is meant to fly.

Not just prototypes, but certified systems that operate in real-world conditions.

That requires discipline across engineering, safety, and the way we run the business.

Based in Sion, Switzerland, with a growing international footprint, H55 is entering a pivotal new phase as we expand our operations and build the foundation for the next stage of electric aviation.

About the Role We are looking for an IT Application Specialist with a strong foundation in system administration.

As part of the IT team, you will be the go-to person for keeping our business applications and web services running smoothly, from day-to-day operations to full software lifecycle ownership across the organisation.

You will ensure service continuity, manage user access, support end-users, and contribute to IT projects.

Your ability to document what you build and maintain will be as valued as your technical skills.

Main Responsibilities Application & Web Services Management Deploy and maintain on-premise and cloud/SaaS applications, including ERP systems.

Own the full software lifecycle: installation, configuration, updates, patching, and decommissioning.

Manage API integrations, reverse proxy configurations (Nginx/Apache), and SSL certificates.

Database Administration Manage SQL databases (MySQL, PostgreSQL, MSSQL), including backups, access rights, and day-to-day queries.

This is not a dedicated DBA role, but confidence maintaining and querying databases is expected.

Identity & Access Management Manage user identities and permissions through Active Directory, Azure AD/Entra ID, LDAP, and SSO.

Enforce RBAC policies, manage groups, and conduct access reviews and audits.

Data Handling & Reporting Handle data exports, basic ETL tasks, and reporting needs using Power BI or equivalent tools to support business operations.

User Support Provide support for users and business applications.

Manage tickets and requests through tools such as GLPI or Odoo.

Security & Monitoring Monitor services, respond to incidents, apply security patches, and track vulnerabilities across the environment.

Documentation Maintain up-to-date technical documentation, procedures, application catalogues (licences, versions, dependencies), and asset inventories.

Your Profile Education & Experience CFC, Bachelor’s degree in IT, or equivalent qualification 3+ years of experience in a similar role Relevant certifications are a plus, including: ITIL Microsoft AZ-104 Linux LPIC-1 Technical Skills Experience deploying and maintaining on-premise and SaaS applications throughout their lifecycle Working knowledge of SQL databases, including backups, rights management, and basic queries Familiarity with identity management technologies such as Active Directory, Azure AD/Entra ID, LDAP, and SSO Ability to handle data exports, ETL processes, and reporting tasks Experience with Odoo or similar ERP/business applications is an asset Working knowledge of Linux and Windows Server environments, including installation, configuration, and troubleshooting Understanding of web services infrastructure, including reverse proxies, SSL certificates, and API integrations How You Work Comfortable finding answers independently, reading technical documentation, and learning new technologies as the environment evolves Service-oriented, with clear communication toward non-technical users Strong documentation discipline: knowledge should remain documented and traceable within systems and procedures Able to manage priorities and handle multiple workstreams within a small team environment Structured, reliable, and attentive to operational detail This role has a direct impact on how the company operates and scales.

You will work closely with teams across the organisation and contribute to building a reliable, secure, and scalable IT environment that supports H55’s growth.

We are building a team with a range of backgrounds and perspectives, and we value people who bring different ways of thinking and working.

If this role interests you but you do not meet every requirement, we encourage you to apply.

Ready to help make electric aviation a certified reality?

Let’s talk.

Additional Information H55 is committed to building an inclusive workplace and welcomes applications from all qualified individuals regardless of nationality, gender, disability, religion, sexual orientation, or age.

Employment decisions are based on skills, experience, and business needs.

We are committed to providing an inclusive recruitment process.

If you require any accommodations during the application or interview process, please let us know.

By applying for this position, you agree that your personal data will be processed for recruitment purposes in accordance with applicable data protection laws.

Your data will be handled confidentially and retained only as long as necessary for the recruitment process.

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