Angelos Bimpoudis (Aggelos Biboudis)

About

I work in the Java Platform Group at Oracle, advancing the Java programming language in OpenJDK through language design, the JEP process, javac implementation, and authorship of the Java Language Specification (JLS). My current work focuses on pattern matching and broader language evolution under Project Amber.

Previously, I worked on the Scala 3 compiler as a postdoctoral researcher at EPFL with Martin Odersky. I earned my PhD at the University of Athens under Yannis Smaragdakis, where my research focused on programming languages and high-performance stream processing, with publications at POPL, OOPSLA, and ECOOP.

Elected JDK Committer in 2023 and JDK Project Reviewer in 2024.

Get in touch: biboudis att gmail dott com

Java & talks

I contribute to Java language evolution alongside colleagues in Oracle’s Java Platform Group and the wider OpenJDK community. My contributions span delivered features, preview features, draft proposals, and compiler prototypes.

Selected Java language contributions

Unnamed Variables & PatternsJEP Owner: specified and implemented the feature from preview in JDK 21 (JEP 443) to final delivery in JDK 22 (JEP 456).
Primitive Types in Patterns, instanceof, and switchJEP Owner: specified and implemented the feature across five previews in JDK 23–27: 455, 488, 507, 530, and 532. Preview feature.
Enhanced Local Variable DeclarationsJEP Owner: developed the draft proposal and the proposed compiler implementation.
Research Prototype: DeconstructorsCo-authored and prototyped the translation and reflection for deconstructors.
Draft JEP: Exception Handling in switchCo-authored a draft JEP proposing exception handling during switch-selector evaluation.
JLS Chapter 5: conversionsAuthored “Towards a Future-Proof Chapter 5”, a design proposal to refactor the JLS conversion framework (2025).
Preparing for Change: Safe Switching over Sealed APIsCo-authored with Alex Buckley and Brian Goetz. OpenJDK, 2026.

Recorded talks, interviews & panels

Pattern Matching, Under the MicroscopeDevoxx Belgium · 2025
Pattern Matching in Java: Past, Present, FutureDevoxx Belgium · 2024
Ask the architectsDevoxx Belgium · 2025 · Panel participant
Ask the Java ArchitectsDevoxx Belgium · 2024 · Panel participant
JEP Explained: JEP 455JetBrains · 2024 · Discussion with Brian Goetz and Tagir Valeev
Ask me anything about the Java LanguageDevoxx Greece · 2024 · Q&A with Brian Goetz
Pattern Matching — Live Q&ADevoxx Belgium · 2024 · Q&A with Nicolai Parlog

Research & publications

My research spans programming languages, metaprogramming, and efficient stream processing. Publications are listed with their original author names. Full publication list on Google Scholar.

Programming languages

Highest-performance Stream ProcessingO. Kiselyov, T. Kobayashi, A. Biboudis, N. Palladinos, OCaml Workshop'22
All Things Flow: Unfolding the History of StreamsA. Biboudis, J. Gibbons and O. Kiselyov. HaPoC'21, extended abstract (slides)
A Type-and-Effect System for Object InitializationF. Liu, O. Lhotak, A. Biboudis, P. Giarrusso and M. Odersky. OOPSLA'20
Semantics-Preserving Inlining for MetaprogrammingN. Stucki, A. Biboudis, S. Doeraene and M. Odersky. SCALA'20
Report on Theory of Quoted Code PatternsN. Stucki, F. Liu, A. Biboudis. Technical Report, 2020
A Practical Unification of Multi-stage Programming and MacrosN. Stucki, A. Biboudis and M. Odersky. GPCE'18
Initialization Patterns in DottyF. Liu, A. Biboudis and M. Odersky. SCALA'18
Simplicitly: Foundations and Applications of Implicit Function TypesM. Odersky, O. Blanvillain, F. Liu, A. Biboudis, H. Miller, and S. Stucki. POPL'18
Expressive and Efficient Streaming LibrariesA. Biboudis. PhD thesis (slides)
Structured Program Generation TechniquesY. Smaragdakis, A. Biboudis, and G. Fourtounis. GTTSE'15, published 2017 — Grand Timely Topics in Software Engineering
Stream Fusion, to CompletenessO. Kiselyov, A. Biboudis, N. Palladinos and Y. Smaragdakis. POPL'17 (Project, slides, video)
Recaf: Java Dialects as LibrariesA. Biboudis, P. Inostroza and T. van der Storm. GPCE'16 (repo, slides)
Streams à la carte: Extensible Pipelines with Object AlgebrasA. Biboudis, N. Palladinos, G. Fourtounis and Y. Smaragdakis. ECOOP'15 (Project, video, bib)
Automating Ad hoc Data Representation TransformationsV. Ureche, A. Biboudis, Y. Smaragdakis and M. Odersky. OOPSLA'15
jUCM: Universal Class Morphing (position paper)A. Biboudis, G. Fourtounis and Y. Smaragdakis, MASPEGHI'15 (slides)
MorphScala: Safe Class Morphing with MacrosA. Biboudis and E. Burmako. SCALA'14
Clash of the LambdasA. Biboudis, N. Palladinos and Y. Smaragdakis. ICOOOLPS'14 (slides, Project)
Reified Type Parameters Using Java AnnotationsP. Gerakios, A. Biboudis, and Y. Smaragdakis. GPCE'13 (slides, poster)
Forsaking Inheritance: Supercharged Delegation in DelphJP. Gerakios, A. Biboudis, and Y. Smaragdakis. OOPSLA'13

Computer vision

MobiXeyes: Real-time Stereo Vision Technology for Racket SportsO. Sekkas, V. Tsetsos, A. Biboudis, E. Zervas, N. Silvestros, S. Hadjiefthymiades, A. Batistakis. APCST'15

Wireless sensor networks

Multisensor data fusion for fire detectionE. Zervas, A. Biboudis, C. Anagnostopoulos, O. Sekkas, and S. Hadjiefthymiades.

Academic service

Program committees (PC), reviewing, and conference organisation.

ICFP 2023 (PC)
ARRAY 2021 (PC)
GPCE 2021, 2018 (PC)
SPLASH 2019 (web/publicity co-chair)
ML Workshop 2019 (PC)
OOPSLA 2019 (External Reviewer)
Functional Stream Libraries and Fusion: What's Next? (Co-organiser of Shonan Meeting)
REBLS 2017, 2018, 2019 (PC)
SCALA 2017 (PC), 2016 (co-chair)
ECOOP 2016 Artifact Evaluation Committee

Teaching

TA/Lecturer, Foundations of Software (2017, 2018) by Professor M. Odersky
TA/Lab, K04-Introduction to Programming (2011) by Professor P. Stamatopoulos
TA, K10-Object Oriented Programming (2011, 2012) by Professor I. Karali
TA, K22-Operating Systems (2010, 2011, 2012) by Professor S. Hadjiefthymiades
TA, TP06-Compilers (2012) by Professor Y. Smaragdakis