Proposal Guidelines

Euruko 2026 will be a single-track conference. We are looking for talks that are 30–40 minutes long, followed by a short Q&A session. We also plan to host workshops on the second day. There will be multiple workshop rooms, and workshops should be 2 hours long.

We are open to a wide range of topics, here are some examples that we’d find interesting::

• Ruby VM Internals & JIT Compiler Evolution: Deep dives into runtime performance, optimization strategies, and the production-level impact of next-generation compilation engines like YJIT and ZJIT.

• Modular Garbage Collection & Memory Management: Customizing and tuning memory architectures, utilizing pluggable GC frameworks, or integrating modern toolkits like MMTk for high-throughput applications.

• Advanced Concurrency & True Parallelism: Architecting safe, data-race-free parallel systems using modern Ractor primitives like Ractor::Port and leveraging Fiber-based concurrency for heavy I/O workloads.

• Namespace and Process Isolation: Implementing secure multi-tenant software, sandboxed environments, and plugin ecosystems using native in-process isolation tools like Ruby::Box.

• Core Class Performance & Data Processing: Leveraging structural language optimizations under the hood—such as the transition of Set to a C-optimized core class—to drastically reduce execution and memory overhead.

• Progressive Typing & Static Analysis Workflows: Practical strategies for implementing inline RBS type annotations, migrating from legacy signature formats, and seamlessly integrating type checkers into developer pipelines.

• Bespoke Tooling with Modern Parsers: Harnessing the power of the production-default Prism parser to build custom linters, structural refactoring scripts, or deep AST code analysis tools.

• Ecosystem Modernization & Enterprise Upgrades: Real-world case studies on preparing massive codebases for strict language standards, including handling string literal freezing audits and deprecated feature migrations.

• Next-Gen Native Extensions & Gem Security: Moving the ecosystem forward by transitioning away from legacy, compilation-heavy architectures toward modern cross-platform patterns and supply chain security.

• AI-Assisted Engineering & Code Generation at Scale: Best practices for leveraging LLMs to author, refactor, and audit enterprise Ruby codebases; managing repository-wide context, ensure code quality, and safely scaling AI-driven development.

Non-technical talks are also welcome, as long as they are related to Ruby in some way or are useful to an audience of Rubyists.

Selection Criteria

We are aiming to host 10 talks:

2 keynotes and 2 invited talks selected by the organizers
6 talks selected by the program committee

The program committee is a panel of approximately 20 people assembled by the organizers. It includes members of the local Ruby community, organizers of Ruby meetups and conferences (including previous Euruko conferences), and other community members.

Proposals will be evaluated in a two-stage process. The first stage is anonymized, meaning that reviewers cannot see speaker details.

Talk selections will be made approximately two weeks after the CFP closes. All submitters will be informed of their proposal status as soon as possible after the CFP closes.