Software Solutions Developer - CAREL FRANCE

Carel Industries s.p.a; Lyon; On-site; EUR 55,000 - 75,000; Full time

Job summary

CAREL France is seeking a Software Solutions Developer to migrate and structure embedded applications on CAREL programmable controllers for refrigeration, HVAC, BMS/EMS, and energy management systems.

The role emphasizes robust software engineering in an industrial setting, using Structured Text (ST), object-oriented design, and APIs with automated testing and documentation. Collaboration with field experts and cross-functional teams is essential.

Qualifications

• Experience with embedded applications in an industrial setting.
• Ability to migrate and structure software with modular architecture.
• Proficiency in version control, testing, and documentation.

Responsibilities

• Analyze existing controller applications and define a migration strategy to recent CAREL platforms.
• Design modular software architecture for IEC 61131-3 applications that is maintainable and scalable.
• Develop software in Structured Text (ST) following CAREL principles.
• Structure code around functions, classes, interfaces, or function blocks.
• Enforce Git best practices, including reviews, traceability and releases.
• Create automated/unit tests and non-regression test matrices.
• Integrate HMI interfaces, web applications, REST APIs and supervision systems.
• Collaborate with refrigeration specialists, commissioning engineers, and business experts.

Skills

Structured Text ST

IEC 61131-3

Git

Unit testing

API development

OOP

Documentation

HMI integration

Collaboration

Tools

Git

Job description

CAREL France is the French commercial subsidiary of the CAREL Group, a global leader in control solutions for refrigeration, HVAC, and energy efficiency. We support our customers across French, Belgian, Luxembourg and Maghreb markets with local sales, technical expertise, training, and service, while leveraging the innovation and resources of an international organization.

We are looking for a Software Solutions Developer responsible for the migration, structuring, development, and validation of embedded applications running on CAREL programmable controllers, intended for the control of commercial refrigeration, HVAC, BMS/EMS, and energy management systems.

As an experienced software developer, the candidate is able to apply robust software engineering practices in an industrial environment, including modular architecture, object‑oriented programming (OOP), Git, testing, documentation, APIs, and legacy code migration.

Key Activities:

• Analyze existing controller applications and define a clean migration strategy to recent CAREL platforms.
• Design a modular software architecture for IEC 61131-3 applications that are maintainable, testable, and scalable.
• Develop software in Structured Text (ST) while applying CAREL development principles.
• Structure code around clearly defined functions, classes, interfaces, or function blocks.
• Establish and enforce Git best practices, including version control, code reviews, traceability, and release management.
• Create automated tests, unit tests, audit tools, and non‑regression test matrices.
• Contribute to the integration of HMI interfaces, web applications, REST APIs, communication systems, and supervisory platforms.
• Collaborate with refrigeration specialists, commissioning engineers, and business experts.