Abdullah Gökmen

Software Engineer

Building scalable backend systems & cross-platform applications

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About Me

• Currently working at the Turkish Ministry of Health, contributing to systems serving 85M+ users
• Focused on backend architecture, microservices, and DevOps practices
• Experienced in building production-grade mobile & web applications
• Backend works and some projects are not shown for security reasons and client requirements

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Tech Stack

Backend

Frontend & Mobile

DevOps & Tools

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Projects

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Open source

Merged contributions I actually landed:

Project	PR
picocli	[doc] Drop the dead hawkeye example
maven-deploy-plugin	[MDEPLOY-315] Clarify deploy without a local distributionManagement
PMD	[java] Fix #6965: AbstractClassWithoutAnyMethod false positive on der...
openhab-addons	[shelly] Add sidebar entries to documentation #21290
openhab-addons	[lutron] Add sidebar entries to documentation #21290
openhab-addons	[linky] Add sidebar entries to documentation #21290
openhab-addons	[unifi] Add sidebar entries to documentation #21290
app-finance	add integration tests to the quality gates chapter [#260]
frostwire/frostwire	[android] Show disk-full error when a cloud download cannot be moved...
openhab-addons	[network] Align allowSystemPings docs with MainUI #20128
gravitino	[#8309] docs: replace deprecated apt-key in how-to-build.md
PMD	[doc] Fix #2527: restore CPD tiling article link
license-maven-plugin	Skip null dependency trail when excluding transitives #310
slf4j	Pin fluent API caller method name in CallerInfoTest
flow	document ComponentEvent.getSource as the listener component #19850
NullAway	Write the full encoded byte array when serializing TSV/XML rows #1788
pf4j/pf4j	Document PluginManager.getExtensions instantiation #293
flow	Clarify Menu javadoc so Hilla is a secondary note #21242
fdb-record-layer	Document SQL support in the FAQ
snowstorm	add UK Edition loading tips #651
databuff	add Python OTLP integration quick-start guide #27
subversion-plugin	Document that included/excluded region regexes match the full path #1431
nexus	empty window is not a selector miss
flow	Improve AppShellConfigurator annotation error details (vaadin/hilla#231)
TornadoVM	add class-level Javadoc to examples #35
camel-quarkus	Document Twitter native locale requirements #2564
valkey-glide	move protobuf encode/decode tests to internals #3947
NullAway	Document MethodRef overload signatures in the sample library model #1016
cucumber-expressions	Add a README to the .NET NuGet package #312
Linthra	add AppStream metainfo for software centres #435
a2a-java	link Javadoc from the README #287
openrouteservice	document csv extra info #1974
serverpod_docs	Add Google and Apple IDP admin operations pages
frankframework/frankframework	Document metrics export options in AppConstants
flutter_file_picker	Relax file_picker_linux dbus to ^0.7.13
sqlite-jdbc	support automatic_index and cache_spill pragmas
philter	Fix curl Content-Type header in filter policies docs #91
lsp4ij	sample for registering a custom LSP client command #553
lsp4ij	update rust-analyzer semantic tokens section #1302
smooth_sheets	add a README link to navigator_resizable
maven-enforcer	Add tests for requireJavaVersion five-part JDK strings #980
mdn/browser-compat-data	Mark api.HTMLAllCollection as deprecated
spoon	add missing Javadoc tags to ProcessingManager #3923
gctoolkit	Add class Javadoc for public event summary types #264
conpot	set FakeSession.maxtimeout before pyghmi _initsession
plantuml/plantuml	add how to update alphadoc #2420
pinot-docs	document broker FailureDetector #13502
capacitor-plugins	keep datetime format default from rendering as a flag #157
maven-ear-plugin	Avoid NPE in isArtifactRegistered when module artifact is null #519
mc-image-helper	say when a mod page URL is given to install-curseforge #685
maven-assembly-plugin	Drop the Maven 2.0 qualifier from the multimodule package-phase note...
citrus	note that validation processors replace default validators
maven-invoker-plugin	Document how to use a JVM debugger with invoker ITs #708
maven-jar-plugin	Document that skipIfEmpty wins over forceCreation
melos	only report success when dart pub exits 0
maven-surefire	Fix #3303: distinguish JUnit 6 ParameterizedClass invocations
maven-remote-resources-plugin	Fail clearly when configureLocator has no project POM #275
jackson-databind	Document that CacheProvider must return new cache instances
lottie-flutter	avoid CanvasKit stack overflow on animated trim paths #411
maven-enforcer	RequireFilesExist should accept a file reached through
jsoup	Add Elements.before(Node) and after/prepend/append(Node) #953
Feign	Skip bridge methods in contract parsing and map them for dispatch
retrofit.dart	serialize FlutterCompute @Body via toJson
mdn/browser-compat-data	Add css.types.color.from_currentcolor for relative color origin
form_builder_extra_fields	add a visual example gallery for extra fields #21
flutter_file_picker	Relax file_picker_linux dbus to ^0.7.13
melos	honor PUB_CACHE when generating IDE files
content	Remove incorrect private+no-store guidance from HTTP caching guide
retrofit.dart	detect generated toJson on Freezed models
mdn/browser-compat-data	VideoFrame.copyTo.format_property
Lithos UI	Toggle coverage for #124
freeCodeCamp	stray article in Toggle Text App

Open pull requests:

Project	PR
bsl-language-server	Document PairingBrokenTransaction early rollback on the diagnostic pa...
camel-quarkus	Document Camel Quarkus build items #2900
Apache Gravitino	[#12492] docs: document jdbc.options for PostgreSQL plan_cache_mode
logging-log4j2	Honor spring.cloud.config.watch.enabled on Log4j2EventListener
maven-acr-plugin	Document Main-Class in the Application Client FAQ #61
maven-ejb-plugin	Fail when the EJB source directory cannot be created #195
maven-help-plugin	Do not let effective-pom encoding fall back to null
maven-jar-plugin	Skip empty JARs when includes match no files #510
maven-shade-plugin	Write an empty relativePath on dependency-reduced-pom.xml
pinot	add RELEASE_POLICY.md #11642
polaris	expand GCS production configuration for sysadmins
apicurio-registry	Remove unchecked generic varargs warning in unionOf #8905
docs	[amplify-libraries][Flutter] Document copyWithModelFieldValues for nu...
flutter_cache_manager	Await store.putFile so cache info is persisted #492
oblivion	how to share the proxy on the LAN #217
BetonQuest/BetonQuest	consistent notify keyword on counting objectives #3967
bytechef	explain JSON File Write source property #2249
mobile-app	show error widget when content fails to load #84
clickhouse-kafka-connect	convert DESIGN.md diagrams to text #712
schema-registry	pretty-print schema JSON with jq
cowrie/cowrie	accept grep -m max-count
aibolit	#696: replace huge Java fixtures with inline examples
cucumber-expressions	Document Python usage in the package README #311
native	[jnigen] Expose editable documentation on the visitor API #3496
deephaven-core	add Raises descriptions for autocomplete #6164
docs	Document OIDC_LOGIN_BUTTON_TEXT on the frontend #6615
DSpace/DSpace	Fix haveNA to honor additional handle prefixes #11449
ditto	Document PUT create for connections #1746
jkube	clarify oc:build defaults to cluster S2I #1528
openvsx	Document how to configure mirror mode
eclipse.platform.ui	Relax LargeFileTest marker timing factor #2622
rdf4j	document gzip uploads on the Workbench add page
exist	[doc] Document recursive xmldb:create-collection() #3869
devtools	Clarify Diff Snapshots Freed column is per class #8837
frankframework/frankframework	Clarify getInputFromSessionKey missing-key exception #11377
FROST-Server	Install uuid-ossp in docker-compose for STRING/UUID ids #308
smooth_sheets	list real-world examples in the README #128
gauge-java	Add gauge_javac_args so javac can emit debug symbols #188
gleec-wallet	Document custom KDF commit builds #3290
dagger	Clarify that enableAggregatingTask is on by default #5235
pyrdp	replace dropped libgl1-mesa-glx with libgl1
gpx-animator/gpx-animator	Add a How to contribute section to the website #220
nowinandroid	point the README at Declarative Gradle #78
grimmory-docs	Clarify Bookdrop NFS/SMB watch limits (grimmory#485)
hapi-fhir	add 2026 changelog section #5034
fl_chart	Remove leftover axisTitleData from chart docs #1201
rohd	add ExternalSystemVerilogModule example to user guide #568
jcabi-github	Add created_at and updated_at to MkCommit #1147
jetty.project	Document pemWorkDirectory on QuicheServerQuicConfiguration #12795
heralding	use configured HTTP banner as Server header
build_verify	Add optional clean before expectBuildClean #22
peanut.dart	extra-args example in peanut.yaml #118
kroxylicious/kroxylicious	use clusterDefinitions instead of targetCluster #4277
armeria	Document the OAuth 2.0 client #5636
mage	Fix NPE when creature type choice is missing #14392
flutter-maplibre-gl	explain local sprites and glyphs via file:// #338
tracing	Remove Brave Zipkin dependency warning from reporters docs #509
injectable	Add constructorCallback to generated micro package init
snare	build Docker image on Python 3.8
Gym	document gym env prefetch CLI #2937
eo	#7988: name the missing map key in the error
apache-kafka-connect-docker	scrape Connect JMX with Prometheus #65
opencast/opencast	Handle null properties in service registry updated() #1174
odd-platform	Add failed job/test status reason to alert chunk descriptions #1227
openremote/openremote	Show client secret length on the interconnect form #1365
security	Document demo installer password checks vs REST API settings #4081
pf4j/pf4j	Document when PluginManager.unloadPlugin returns false #291
PhotonVision/photonvision	add Python photonlib snippets and fix code tabs #1914
java-cfenv	Document IBM Cloud RabbitMQ bindings #69
PlantUML	Document missing Javadoc @param tags #2629
testcontainers-spring-boot	compare this project with official Testcontainers #1224
PMD	[java] ExhaustiveSwitchHasDefault: list missing cases in the violation
powsybl-core	Reject null DataSource in Importers.importData
nessie	CEL filters for commit log, entries, and references #5325
robolectric/robolectric	Include post stack traces when tests fail with unexecuted runnables #...
rstudio/rstudio	debugSource error when keep.source is FALSE #12375
pgpverify-maven-plugin	NPE when ProjectDependencyGraph is null #488
updater	refresh updater library architecture map
OpenNutriTracker	name every contact in What leaves your device #989
endlessh	optional Banner config line
spring-cloud-bus	Document RabbitMQ exclusive queue locator #249
spring-cloud-consul	Document spring.cloud.consul.config.prefixes #746
spring-cloud-zookeeper	Fix ACL authentication docs #239
tut-spring-security-and-angular-js	Add a mocked JWT test for the resource server #23
Spring AI	Normalize advisor observation contextual names
StarRocks/starrocks	[Doc] Skip write-triggered auto-refresh for MVs that will not self-he...
nextcloud-deck	Show a readable error when an attachment hits the server size limit #830
trino-gateway	Replace deprecated MBeanExporter.unexportAll #864
uyuni	Document createOrUpdatePath permissions as a string #7968
flow	Clarify Binder bind(String) does not add BeanValidator #19423
very_good_cli	resolve dart coverage package_config in pub workspaces
vyuh_node_flow	layering panel example for node stacking #10
webforj/webforj	align DateTimeField and TimeField with minute-based format #1497
lottie-flutter	use the dotLottie 2.0 animation path in the README decoder
meshcore-open	add web client and self-host notes to README #325

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