Might be worth looking at CoTech:

CoTech « CoTech « Cooperative Technologists

Building a tech industry that's better for its workers and customers through co-operation, democracy and worker ownership.

CoTech « Cooperative Technologists (www.coops.tech)

While most of their member co-op's are based in the UK, they were occasionally looking for people who are based in the EU, as they would qualify under the residency requirements for tendering for local government contracts.

Also, take a look at the work done by @coopcloud