Ahmad Alsanie

Backend · Senior · Amman, Jordan · UTC+03:00 · Relocation · Work permits: Jordan · Citizenship: Jordan · English: C1 · Can start in 2 weeks

Java Developer

11+ years exp

Java

JavaScript

Python

Kotlin

Scalability & Performance: 7/10

Reliability & Observability: 7/10

API Design: 6/10

Active 1 day ago

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Overview

Technical skills

Projects

Timeline

Roles

Overview

Senior backend engineer specializing in resilient distributed system components and durable execution pipelines. Proven strengths include concurrency, durability and recovery as demonstrated by the distroplane executor, journal writer/reducer and bounded-origin proxy/connection-pool components. Public code does not show traditional relational database schema evolution, large-scale ETL/data-platform work or cloud-managed IAM integrations.

Phone

Technical skills

Languages

Java

JavaScript

Python

Kotlin

Java

Spring Boot

Spring Framework

Netty

DevOps

Kubernetes

Datadog

Terraform

AWS

Amazon S3

AWS Lambda

Amazon CloudWatch

GitHub Actions

Databases

Oracle

PostgreSQL

DynamoDB

Other

Claude

AWS Bedrock

JUnit

Gradle

OpenJDK

Testcontainers

Mockito

GitHub

CI/CD

Apache Kafka

Tooling

Docker

Rest API

Maven

CI/CD

Helm

Jenkins

Modularization

GraphQL

npm

Spinnaker

Projects

Distroplane

Created a Go-based CLI and GitHub Action to distribute releases to npm, SDKMAN, Homebrew, and WinGet. Implemented immutable planning and durable journaling to track uncertain publication outcomes, then reconciled and retried safely when needed. Focused on reliable automation and deterministic publication steps across targets.

Bounded Origin

Designed a Java HTTP gateway and supporting library to control request coalescing, admission limits, and persistent reuse of computed results. Tested concurrent execution behavior, including recovery after crashes and ownership semantics. Published reproducible load tests and JMH benchmarks documenting latency tradeoffs.

Shamash

Built a Java/Kotlin architecture analyzer that models bytecode dependency graphs and detects cycles. Developed a CLI with report outputs and added integrations for GitHub Actions and IntelliJ. Focused on producing extensible, rules-based analysis with machine-readable reporting formats.

Timeline

Software and Platform Engineer · Middle

Independent · Full-Time

Dec 2025 to Present 11 Months In office

Contributed to Spring Boot internals and driver-level improvements for PostgreSQL JDBC, including changes to auto-configuration ordering and structured logging behavior. Implemented performance-focused fixes and added regression and integration tests to validate behavior across the driver suite and reproducible benchmarks.

Java

Spring Boot

PostgreSQL

Software Engineer II · Middle

Amazon · Full-Time

Feb 2025 to Dec 2025 10 Months Amman In office

Worked on Retail Search and Payments, improving relevance and ranking by propagating customer queries through semantic matching and tuning Lucene/HNSW configuration with relevance and business metrics. Reduced production p99 latency in a Java fraud-detection service by profiling the request path and parallelizing MongoDB calls, then validated the gains with CloudWatch. Built internal Arabic relevance services in Python on AWS using Lambda with S3, DynamoDB, and Amazon Bedrock (Claude), optimizing latency by parallelizing model invocations.

Java

Python

AWS

Amazon S3

DynamoDB

AWS Lambda

Claude

AWS Bedrock

Amazon CloudWatch

Senior Software Engineer · Senior

ESL FACEIT Group · Full-Time

Jul 2023 to Sep 2023 2 Months Berlin In office

Developed Heliyon product features using Java with JSP and JavaScript, working with an internal content-management platform. Delivered improvements aligned to product requirements during the engagement period.

Java

JavaScript

Software Engineer II · Middle

Delivery Hero · Full-Time

Sep 2022 to Apr 2023 7 Months Berlin In office

Built and shipped a JWT authentication service shared by logistics frontend and backend to support vendor onboarding and menu-related workflows. Owned US point-of-sale vendor rollout by deploying services on Kubernetes and managing infrastructure with Terraform. Mentored a junior engineer and improved internal onboarding documentation.

Kubernetes

Terraform

Software Engineer III · Middle

Expedia Group · Full-Time

Mar 2018 to Aug 2022 4 Years 5 Months Amman In office

Improved hotel-page performance by building an i18n service that consolidated localization calls, using profiling, benchmarking, and Datadog validation to confirm production impact. Led release automation for a bill of materials spanning many shared JVM libraries, reducing weekly workflow time by automating snapshot installation, validation, and releases. Enabled large-scale cleanup of obsolete monolith files by creating Java analysis and runtime usage logging, and built a shared ICU4J library for locale-aware date/time/currency formatting used by JVM services.

Java

Datadog

Software Engineer · Middle

Atypon · Full-Time

Feb 2016 to Oct 2016 8 Months In office

Implemented features using Java and JSP, and integrated JavaScript behavior within an internal content-management platform. Contributed to ongoing enhancements of Heliyon-related functionality.

Java

JavaScript

Software Consultant · Middle

eBECS · Full-Time

Aug 2015 to Feb 2016 6 Months In office

Customized business software by implementing client-side logic in JavaScript and backend or service components in C#. Worked on adaptations and customizations of existing systems based on business needs.

JavaScript

University of Jordan

Bachelor's Degree · Computer Information Systems

2015 Amman, Jordan

Software Engineer II · Middle

Expedia Group · Full-Time

Amman In office

Java

Associate Software Engineer · Middle

Expedia Group · Full-Time

Amman In office

Java

Senior Backend Developer Confidence: High Distributed Systems

API Design

6/10

How well APIs are designed

API surface and error contracts are deliberately designed for interoperability and stability, with explicit request/response boundaries and representation handling in a network gateway and Spring integration.

Evidence

bounded-origin/bounded-origin-proxy/src/main/java/io/github/aalsanie/boundedorigin/proxy/GatewayRequestHandler.java

bounded-origin/bounded-origin-proxy/src/main/java/io/github/aalsanie/boundedorigin/proxy/RepresentationBoundary.java

codes/codes-spring/src/main/java/io/github/aalsanie/codes/spring/ProblemDetails.java

Data Layer & Database

5/10

Working with databases

No traditional RDBMS work, but strong evidence of a custom durable journal and event-reduce semantics with careful validation, sequencing and state reconstruction.

Evidence

distroplane/internal/journal/writer.go

distroplane/internal/journal/reducer.go

distroplane/internal/journal/frame.go

Scalability & Performance

7/10

Handling load and speed

Performance and scale are explicit concerns: benchmarks, JMH suites, executor schedulers for thousands of operations, connection pooling and careful concurrency testing demonstrate measured scalability work.

Evidence

bounded-origin/bounded-origin-benchmarks/src/jmh/java/io/github/aalsanie/boundedorigin/cli/ConfigurationBenchmark.java

distroplane/internal/executor/executor_test.go

bounded-origin/bounded-origin-proxy/src/main/java/io/github/aalsanie/boundedorigin/proxy/OriginConnectionPool.java

System Architecture

6/10

Overall system structure

Clear modular decomposition (api/core/proxy/cli/store), event-sourced run journals and executor/lease separation show deliberate architecture choices for resilient, recoverable workflows.

Evidence

bounded-origin/bounded-origin-core/src/main/java/io/github/aalsanie/boundedorigin/core/PolicyEngine.java

bounded-origin/bounded-origin-proxy/src/main/java/io/github/aalsanie/boundedorigin/proxy/BoundedOriginGateway.java

distroplane/cmd/distroplane/commands.go

Security & Auth

6/10

Protecting data and access

Security and secrecy are addressed: safe-dial checks, credential-source validation, explicit refusal of unsafe inputs, and tests ensuring secrets are not leaked from state files.

Evidence

distroplane/cmd/distroplane/doctor_network.go

distroplane/internal/credentials/credentials.go

distroplane/cmd/distroplane/doctor_test.go

Reliability & Observability

7/10

Stability and monitoring

Robust reliability patterns: lease renewal and expiry, operation timeouts and cancellation handling, journaling durability tests and restart/recovery logic with many targeted tests.

Evidence

distroplane/internal/executor/executor.go

distroplane/internal/journal/writer.go

distroplane/internal/executor/executor_test.go

Verified artifacts

spring-projects/spring-boot· ★ 81.7K microsoft/winget-pkgs· ★ 11.3K pgjdbc/pgjdbc· ★ 1.7K zaproxy/zap-api-java· ★ 53

Expertise

Python· Senior

Go Development· Senior

Microservices & API Architecture· Senior

Technologies

Go· Senior

Rest API

Spring Framework

GraphQL

Spring Boot· since 2025

Mockito

Apache Kafka

Netty

Core· mentioned only

gRPC· mentioned only

Kotlin· mentioned only

Recommendations

Design and implement resilient proxies, gateways and origin-boundary components that need connection pooling, request coalescing and safe origin dialing.
Build fault-tolerant job/execution systems or orchestration components that require leasing, durable journals and restart/recovery semantics.
Develop release-distribution tooling and CLI-driven automation where recoverability and artifact provenance are critical.
Implement high-throughput, low-latency services that require careful concurrency testing and benchmarking (JMH / Go benchmarks).

Repositories

The developer's experience in this domain has been verified based on AI analysis of the following repositories:

codes distroplane bounded-origin

Senior Mobile Developer Confidence: High Generalist

Senior backend Java engineer specializing in high-concurrency HTTP gateway and resilience infrastructure. Proven strength in concurrent systems and capacity-control design, demonstrated by the bounded-origin modules and extensive concurrency and failure-mode tests (e.g. bounded-origin-core/src/main/java/io/github/aalsanie/boundedorigin/core/BoundedOriginExecutor.java and tests such as bounded-origin-core/src/test/java/io/github/aalsanie/boundedorigin/core/BoundedOriginExecutorMutationTest.java). There is no public evidence of mobile platform work, native mobile integrations, or mobile UI/UX expertise in the provided code.

Platform Native Mastery

Knowing the mobile platform

Not evidenced in public code

Mobile UI/UX & Responsiveness

Smooth mobile experience

Not evidenced in public code

Performance & Battery

Speed and battery use

Not evidenced in public code

Offline & Data Sync

Working offline and syncing

Not evidenced in public code

Device Integration

Using device features

Not evidenced in public code

Release & App Lifecycle

Building and publishing apps

Not evidenced in public code

Technologies

Tooling

Java· since 2016 · Senior

Kotlin· Senior

JUnit

Gradle

Modularization

Recommendations

Develop high-throughput backend services and HTTP gateway/proxy components requiring concurrency control and resource budgeting.
Design and implement resilience libraries and single-flight/caching systems for service-to-origin materialization.
Build JVM libraries and multi-module publishing pipelines with strong test coverage and reproducible builds.
Create CLI tools and server-side benchmarking suites that need careful performance and lifecycle testing.

Repositories

The developer's experience in this domain has been verified based on AI analysis of the following repositories:

codes bounded-origin

Senior QA Engineer Confidence: High SDET

Senior SDET and backend reliability engineer specializing in concurrent Java services and robust test infrastructure. The strongest proven skill is designing and exercising concurrency-safe, contract-focused integration and performance tests as shown by BoundedOriginExecutorMutationTest and ZeroCodeEndToEndTest. Public code does not show frontend E2E/UI automation frameworks or large-scale cloud deployment orchestration pipelines.

Test Automation Frameworks

7/10

Building automated tests

Strong home-grown test automation tooling and fixtures: API snapshot tooling, process-level fixtures, mock origins and deterministic temp-dir isolation are present and repeatedly used in tests.

Evidence

aalsanie/codes/testing/api-snapshot/src/main/java/io/github/aalsanie/codes/testing/PublicApiSnapshot.java aalsanie/bounded-origin/bounded-origin-cli/src/test/java/io/github/aalsanie/boundedorigin/cli/ZeroCodeEndToEndTest.java aalsanie/bounded-origin/bounded-origin-core/src/test/java/io/github/aalsanie/boundedorigin/core/ManualThreadFactory.java

Test Coverage & Strategy

6/10

What and how to test

Test suite emphasizes negative paths, boundaries and concurrency edge cases rather than only happy-path assertions; many tests assert exact failure modes and state transitions.

Evidence

aalsanie/bounded-origin/bounded-origin-core/src/test/java/io/github/aalsanie/boundedorigin/core/BoundedOriginExecutorMutationTest.java aalsanie/bounded-origin/bounded-origin-proxy/src/main/java/io/github/aalsanie/boundedorigin/proxy/GatewayRequestHandler.java aalsanie/bounded-origin/bounded-origin-cli/src/test/java/io/github/aalsanie/boundedorigin/cli/ZeroCodeEndToEndTest.java

API & Integration Testing

6/10

Testing how parts work together

Concrete contract and integration testing is present, including Spring MockMvc/WebTestClient contract tests and multi-process end-to-end process harnesses exercising HTTP semantics and artifact stores.

Evidence

aalsanie/codes/reference/spring-orders/src/test/java/com/example/orders/OrderHttpContractTest.java aalsanie/bounded-origin/bounded-origin-core/src/test/java/io/github/aalsanie/boundedorigin/core/PolicyModelIntegrationTest.java aalsanie/bounded-origin/bounded-origin-cli/src/test/java/io/github/aalsanie/boundedorigin/cli/ZeroCodeEndToEndTest.java

Performance & Load Testing

7/10

Testing speed under load

Clear performance engineering focus: JMH microbenchmarks and reproducible benchmark campaigns with capture, summarization and artifact verification scripts.

Evidence

aalsanie/bounded-origin/bounded-origin-benchmarks/src/jmh/java/io/github/aalsanie/boundedorigin/cli/ConfigurationBenchmark.java aalsanie/bounded-origin/bounded-origin-benchmarks/scripts/microbench.py aalsanie/bounded-origin-git/benchmarks/campaign.py

Bug Reporting & Analysis

4/10

Finding and describing bugs

Bug-analysis and verification are driven by tests and verification scripts; there are useful evidence-verification checks but fewer public issue/bug-report artifacts in the provided files.

Evidence

aalsanie/bounded-origin/bounded-origin-benchmarks/scripts/summarize_results.py aalsanie/bounded-origin/bounded-origin-core/src/test/java/io/github/aalsanie/boundedorigin/core/BoundedOriginExecutorMutationTest.java

CI Test Integration

5/10

Running tests automatically

Some CI-oriented artifacts and test-automation hooks are visible (API snapshot gating, process smoke tests), but explicit engineered CI matrices, per-test artifact retention policies and selective-diff test routing are not strongly evidenced in the human-authored files.

Evidence

Expertise

SDET & Test Engineering· Senior

Industries

Internet Services· Senior

Software· Senior

Technologies

CI/CD

Python· since 2025 · Senior

JavaScript· since 2015 · Junior

C#· since 2015

Terraform· since 2022

Maven

Helm

GitHub Actions

Datadog· since 2018

CI/CD

Jenkins

AWS· since 2025

Docker

Kubernetes· since 2022

Testcontainers

OpenJDK

Spinnaker

AWS Lambda· since 2025

GitHub

Amazon S3· since 2025

Amazon CloudWatch· since 2025

Recommendations

Build and own concurrency-heavy backend components, worker pools and origin-proxy systems where deterministic testing and failure-mode coverage are required.
Design and implement system-level performance benchmarks and SLO-driven load campaigns with reproducible artifact verification and reporting.
Develop contract and integration test suites for HTTP APIs and artifact-stores, including negative-path, timeout and idempotency semantics.
Create test infrastructure (process fixtures, managed synthetic origins, API snapshot gating) and integrate them into CI pipelines with traceable artifacts and metrics.

Repositories

The developer's experience in this domain has been verified based on AI analysis of the following repositories:

codes bounded-origin bounded-origin-git