In Finland, contracts are based on collective labour agreements. Almost every field has its own labour agreement. However, pay is sometimes negotiable. If it is, this is mentioned in the job advertisement, and candidates are usually asked to indicate their expectations in their application.
Pay is usually expressed in hourly or monthly terms. Holiday pay is based on the statutory requirement. In some fields or enterprises (especially in executive positions), you may negotiate annual bonuses, which are likely to be performance-related.
Extra benefits are very common in Finland and include luncheon vouchers, sports and cultural discount vouchers, and occupational healthcare. In some companies, you may be supplied with a leased car. Some advantages are negotiable. Consult your new superior, who can tell you the right person to negotiate these extra benefits with.