The main route from graduating in Ireland to permanent residency runs through the Critical Skills Employment Permit (CSEP). This is Ireland's fast-track work permit and it's designed to attract skilled international workers into occupations where there's a genuine national shortage.
To qualify for a CSEP, you need a job offer in an occupation on the Critical Skills Occupations List, with a minimum annual salary of €38,000. Alternatively, any job paying €64,000 or more qualifies regardless of the specific occupation. A relevant degree is usually required. The list is maintained by the Department of Enterprise, Trade and Employment and updated periodically, so it's worth checking the current position for your target field.
After two years on a CSEP, you can apply for Stamp 4. Stamp 4 removes the employment permit requirement, gives you access to almost any job, and simplifies bringing family members over. It's the closest thing to permanent status short of full citizenship.
Citizenship by naturalisation is available after five years of reckonable residence in the previous nine years. A realistic timeline from graduation is around three years to Stamp 4 and around five years to citizenship, though individual circumstances vary. The Employment Permits Act 2024, in force since September 2024, made it easier for CSEP holders to change employers without restarting the permit process.