Remote Edge & PLC Integration Engineer (Freelance)

Falu AG; Joweid Zentrum; On-site; CHF 120,000 - 180,000; Full time

Benefits offered by this job

Remote by default

Freelance friendly

AI tooling budget

Travel paid on top of rate

Job summary

FALU AG in Rüti (ZH) builds and sells swab production machines with PMAS cloud monitoring. We seek a freelance integration engineer to cover PLC software, Raspberry Pi edge devices, site gateway, and broker connections, collaborating with the in-house team and CEO. Expect long-term engagement with periodic travel primarily across Europe and the US.

You will manage PLC data, implement edge provisioning, and ensure reliable uptime while supporting commissioning and onboarding for customers.

Qualifications

• Siemens PLC programming in TIA Portal (SCL and LAD, S7-1200/1500).
• Industrial networking: PROFINET, VLANs, static and DHCP setups, firewalls, TLS basics.
• Linux on Raspberry Pi or comparable SBC: systemd, networking, images, headless operation, remote administration.
• Solid programming skills in Python or Node.js for edge software, and Git as a daily tool.
• MQTT in depth: versions 3.1.1 and 5.0, QoS levels, retained messages, last will, TLS, broker ACLs.
• Proficiency with AI coding tools is a hard requirement. You use such tools daily and review outputs.
• Working proficiency in English (code, commits and documentation in English); German is a plus.
• Willingness to travel to customer plants, typically a few days per quarter.
• Available for at least two days per week on a permanent basis as a freelancer.

Responsibilities

• Work on PLC to MQTT broker path, with scope defined by strengths.
• Decide data exit strategy from PLC: MQTT publish or edge read, justify and standardise.
• Manage PLC software versions with safe update and rollback.
• Ensure PLC clock discipline (NTP, local time per plant).
• Develop and maintain Raspberry Pi edge software: MQTT client, buffering, health reporting.
• Maintain the site gateway: routing, TLS, NTP, remote maintenance, watchdogs.
• Turn current setup into provisioning process: golden image, per-machine config, fleet updates.
• Monitor edge layer to detect degraded devices early.

Skills

Siemens PLC programming

Industrial networking

Linux on SBC (Raspberry Pi)

Python or Node.js

Git

MQTT

AI coding tools

English proficiency

Travel willingness

Freelancer invoicing

Tools

HiveMQ Cloud

MQTT brokers

OPC UA

Docker on ARM

Job description

FALU AG in Rüti (ZH) builds and sells swab production machines with PMAS cloud monitoring. We seek a freelance integration engineer to cover PLC software, Raspberry Pi edge devices, site gateway, and broker connections, collaborating with the in-house team and CEO. Expect long-term engagement with periodic travel primarily across Europe and the US.

You will manage PLC data, implement edge provisioning, and ensure reliable uptime while supporting commissioning and onboarding for customers.