Two-day Java and JVM developer conference at Sofia Tech Park, June 3-4 2026, organised by the Bulgarian Java User Group, featuring 79 speakers across two tracks on Java, JVM languages, mobile, web, and software engineering practices.
jPrime is an annual developer conference organised by the Bulgarian Java User Group, held each year at Sofia Tech Park in the John Atanasoff Innovation Forum. The conference runs two simultaneous tracks covering the Java platform, JVM languages, mobile development, web technologies, and software engineering best practices. The event brings together international speakers alongside practitioners from Bulgaria and the wider Balkan region.
The 2026 programme features 79 speakers across two tracks, with content spanning the Java ecosystem broadly: language updates, JVM internals, frameworks, architecture patterns, and applied practices in mobile and web. The conference does not restrict itself to Java alone, including talks relevant to any JVM-hosted language and adjacent engineering topics.
jPrime is the Bulgarian Java User Group's annual conference, one of the longest-running developer community events in Southeast Europe. It operates as a practitioner-first event: the programme is selected by the community and speakers are primarily active developers rather than vendor representatives.
The conference covers the broader JVM ecosystem, including Kotlin, Scala, and Groovy, as well as adjacent topics in mobile and web development. Java is the dominant thread but not the only relevant one.
The 2026 edition has 79 speakers confirmed, according to the organiser.
Sofia Tech Park, located at Tsarigradsko Shosse 115B, is Bulgaria's first science and technology park. The John Atanasoff Innovation Forum within the park provides purpose-built conference space. The venue is named after John Atanasoff, the Bulgarian-American physicist credited as a pioneer of electronic digital computing.
The Bulgarian Java User Group (BGDJUG) is a volunteer-run developer community organisation that has organised jPrime for multiple consecutive years. The group is affiliated with the international Java User Group network and operates the conference on a non-commercial basis, with community volunteers handling programme curation and logistics.
jPrime consistently draws an international speaker roster to Sofia, making it one of the more geographically diverse Java community events in the European southeast.
Tickets are available at jprime.io. The regular ticket price is EUR 170 (VAT included), according to the organiser. An early-bird rate of EUR 115 was available until February 15, 2026. A student ticket is available at EUR 65.
Sofia Tech Park is located at Tsarigradsko Shosse 115B, accessible by metro (Tsarigradsko Shosse station) and bus from Sofia city centre. The journey from Sofia Airport takes approximately 30 minutes by public transit.
Several hotels are available along Tsarigradsko Shosse and in the surrounding business district. The jPrime website may list recommended options.
Yes. A student ticket is priced at EUR 65, according to the organiser. Student status verification requirements are not publicly disclosed as of verification.
| Official website | https://jprime.io/ |
| Register | https://jprime.io/ |
| Programme | not publicly disclosed as of verification |