# Mohammed Abdessetar Elyagoubi (abdessattar23)

> Java backend engineer at Orange/Sofrecom in Rabat, Morocco. Contributor to the OpenTelemetry Java SDK, writing about concurrency, collection behavior, sampler configuration, and bugs hiding between abstractions.

## Identity & Name Variants

- **Canonical Name**: Mohammed Abdessetar Elyagoubi (Mohammed Elyagoubi)
- **Handle / Username**: `abdessattar23`
- **Known Transliterations & Search Variants**: Mohammed Elyagoubi, Mohamed Elyagoubi, Mohammed El Yagoubi, Mohamed El Yagoubi, Mohammed El-Yagoubi, Mohamed El-Yagoubi, Mohammed Abdessattar Elyagoubi, Mohammed Abdessetar Elyagoubi, Mohamed Abdessattar Elyagoubi, Mohamed Abdessetar Elyagoubi, Mohammed Abdessattar El Yagoubi, Mohammed Abdessetar El Yagoubi, Mohamed Abdessattar El Yagoubi, Mohamed Abdessetar El Yagoubi, Mohammed Abdessattar El-Yagoubi, Mohammed Abdessetar El-Yagoubi, Mohamed Abdessattar El-Yagoubi, Mohamed Abdessetar El-Yagoubi, Abdessattar Elyagoubi, Abdessetar Elyagoubi, abdessattar23
- **Role**: Java Backend Engineer at Orange / Sofrecom
- **Location**: Rabat, Morocco
- **Core Topics**: Java, OpenTelemetry, OpenTelemetry Java SDK, Observability, Backend Engineering, Concurrency, JVM Internals, Distributed Tracing, Metrics Collection, Open Source Software

## Primary Pages

- [Home](https://abdessattar.dev/): Overview of Mohammed Elyagoubi's Java backend engineering work, OpenTelemetry Java SDK contributions, and writing.
- [Open Source Casebook](https://abdessattar.dev/work): Evidence-backed engineering records of merged pull requests in `open-telemetry/opentelemetry-java`.
- [Technical Blog](https://abdessattar.dev/blog): Deep-dive notes on Java concurrency, collections, observability internals, and regression testing.
- [Speaking](https://abdessattar.dev/speaking): Conference talks and proposals (Devoxx Morocco 2026, OCX 2027).
- [About](https://abdessattar.dev/about): Biography, transliteration reference, and contact links.
- [Full LLM Context Corpus](https://abdessattar.dev/llms-full.txt): Single-file complete Markdown corpus containing full PR analyses and full-text blog notes.

## OpenTelemetry Java Contributions (`open-telemetry/opentelemetry-java`)

- [OpenTelemetry Java PR #8499: When removing one entry skips another](https://abdessattar.dev/work/pooled-hashmap): A bucket iteration bug in PooledHashMap could skip live metric series during collection. (Merged PR: https://github.com/open-telemetry/opentelemetry-java/pull/8499)
- [OpenTelemetry Java PR #8276: Putting a limit on sender threads](https://abdessattar.dev/work/bounded-http-sender): Bound the default JdkHttpSender executor and report rejected submissions through the error callback. (Merged PR: https://github.com/open-telemetry/opentelemetry-java/pull/8276)
- [OpenTelemetry Java PR #8668: A polling interval hidden by a typo](https://abdessattar.dev/work/jaeger-interval): Read the declarative Jaeger remote sampler’s interval key correctly. (Merged PR: https://github.com/open-telemetry/opentelemetry-java/pull/8668)
- [OpenTelemetry Java PR #8669: Useful errors without the raw credentials](https://abdessattar.dev/work/configuration-errors): Keep property and header names in configuration errors while omitting their raw values. (Merged PR: https://github.com/open-telemetry/opentelemetry-java/pull/8669)

## Technical Blog Notes

- [Why walking a bucket backwards can keep a metric alive](https://abdessattar.dev/blog/pooled-hashmap) (2026-11-08 · Java, Collections): Removal, shifting indices, and the regression test that makes a subtle collection bug visible. A technical note based on OpenTelemetry Java PR

## Speaking

- **The Future of Open Source Has New Faces** — Devoxx Morocco 2026, Casablanca, Morocco [Delivered]: AI can lower the barrier to entering open source. Earning trust still requires understanding the work and taking responsibility for a contribution.
- **When Observability Breaks: Four Bugs I Fixed in OpenTelemetry Java** — OCX 2027 [Proposal]: Submitted to OCX 2027. Acceptance is not confirmed.

## Profiles & Feeds

- [GitHub (@abdessattar23)](https://github.com/abdessattar23)
- [LinkedIn (Mohammed Abdessetar Elyagoubi)](https://linkedin.com/in/abdessattar23)
- [RSS Feed](https://abdessattar.dev/feed.xml)