Embedded Software Engineer

Cathcart Technology; Tampere; Hybrid; EUR 83,000 - 103,000; Full time

Job summary

Cathcart Technology is seeking an Embedded Software Developer with strong CODESYS and PLC experience for an initial 3–4 month freelance assignment in Finland. The project involves developing control systems for heavy machinery and integration with C/C++ applications. Remote work is possible with periodic on-site testing in Turku/Raisio or Tampere.

Start timing is September/October 2026. The role emphasizes functional safety, ISO 26262, and Machinery Directive alignment, with English as the

Qualifications

• Strong hands-on experience with CODESYS development and PLC logic.

Responsibilities

• Developing and updating control system applications using CODESYS.
• Developing application layers for new EPEC hardware modules.
• Working with C/C++ applications alongside CODESYS-based control logic.
• Supporting integrations and migrations between CODESYS runtime and other applications.
• Contributing to functional safety and requirements management.
• Testing software against physical hardware and machinery.

Job description

Embedded Software Developer – CODESYS & C

Freelance | €60–75/hour | Turku / Tampere / Hybrid | Initial 3–4 months

We are looking for an experienced Embedded Software Developer to join an industrial R&D project focused on control systems for heavy machinery.

This is an initial 3–4 month freelance assignment, starting as soon as the right person is available, with a strong possibility of extension.

The project involves the continued development and modernisation of load handling control systems, including developing application layers for new hardware modules and integrating CODESYS-based control logic with C/C++ applications.

We're particularly interested in speaking with developers who have strong practical experience with CODESYS and PLC development, alongside knowledge of C or C++.

What you'll be working on

• Developing and updating control system applications using CODESYS
• Developing application layers for new EPEC hardware modules
• Working with C/C++ applications alongside CODESYS-based control logic
• Supporting integrations and migrations between CODESYS runtime and other applications
• Contributing to functional safety and requirements management
• Testing software against physical hardware and machinery

What we're looking for

The key requirement is strong hands‑on experience with CODESYS development and PLC logic.

Experience in some of the following would also be beneficial:

• C and/or C++ development
• EPEC control modules
• Embedded control systems
• Mobile or heavy machinery
• Functional Safety
• ISO 26262
• EN ISO 13849
• Machinery Directive requirements
• Hardware or bench testing

You don't necessarily need experience across every area. If you have strong CODESYS experience alongside a background in embedded or industrial control systems, we'd be keen to hear from you.

The majority of development work can be completed remotely, but you will need to be able to attend Raisio/Turku or Tampere for hardware, bench or vehicle testing when required.

The working language is English, with Finnish considered beneficial but not essential.

Contract

Initial duration: 3–4 months, with a good possibility of extension

Start: September/October 2026, or as agreed

Location: Turku/Raisio or Tampere + remote working

If you have strong CODESYS experience and are available for a new freelance project this autumn, please get in touch to discuss the project in more detail.