moaaz.dev

Moaaz Elshazly

Building Cloud Tech That Scales

I design and build the systems that have to be right — money, scale and reliability — and I stay in the code while doing it. 10 years of engineering experience, seven of them leading teams, the last four working independently with platforms across the region.

What I do

Where I'm most useful

AI chat & product recommenders

Conversational search and recommendation over large catalogs. Self-hosted and managed models, retrieval grounding, structured outputs, and evaluation harnesses that decide whether a model is actually fit to ship.

Built a conversational search service on a self-hosted LLM over a multi-million-track catalog

BedrockvLLMRAGLangChain4jEvaluation

AWS cost reduction

I find where the money actually goes — data processing, idle capacity, oversized functions — and remove it without touching what users experience. Measured before and after, never estimated.

Took one platform from $44.5k to $30k a month, no degradation, no rollback

Cost engineeringVPC endpointsRightsizingFinOps

AWS architecture & migrations

Designing systems that hold under load, and moving live ones without downtime. Snapshot and rollback strategy first, cutover second, old infrastructure deleted only after production proves itself.

Helped migrate on-premise systems onto AWS, and moved managed services onto self-hosted infrastructure

ECSLambdaOpenSearchVPCCloudFront

Observability & dashboards

Health dashboards that let an on-call engineer diagnose from one screen, and alarms tuned against measured baselines so they stay actionable instead of becoming noise people mute.

Built the monitoring layer a multi-service production platform runs on

CloudWatchAlarm designRunbooksIncident response

Android & cross-platform apps

Production mobile work from architecture to store release — native Android, Kotlin Multiplatform and Flutter — with the crash triage and CI discipline that keeps quality from sliding.

Raised crash-free users from 80% to 99.8% on a marketplace app

KotlinKMPComposeFlutterCI/CD

Admin dashboards & internal tools

The systems teams run the business on: content and user management, support tooling, audit logging and reporting. Full stack, from schema design through to the UI people use all day.

Shipped admin platforms handling content, users, promotions and loyalty

KtorSpring BootReactPostgreSQL

Deep linking & attribution

Links that survive an app-store install and land users on the right content, with the analytics to prove it — deferred deep linking, universal links, and install attribution.

Building a links-only platform to replace Firebase Dynamic Links

Lambda@EdgeUniversal LinksApp LinksAttribution

Hands-on technical leadership

Growing engineers and the systems that support them. Code-review culture, hiring and interviewing, technical-debt programmes, and automated review tooling that gives every pull request context-aware feedback.

Built an LLM code reviewer that reviews every pull request a team opens

MentoringHiringCode reviewTech debt

Coding activity

7,840 commits since 2019

1,964 commits in 2026

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Tools

What I build with

Cloud
AWS · ECS/Fargate · Lambda · EC2 · S3 · CloudFront · API Gateway · RDS · DynamoDB · Redshift · OpenSearch · Firehose · SQS · Cognito · VPC · WAF · CloudWatch · Bedrock
Languages
Kotlin · Java · Python · TypeScript · Dart · SQL · Bash
Backend
Spring Boot · WebFlux · Ktor · Node · PostgreSQL · ClickHouse · Redis · Flyway
Mobile
Android · Jetpack Compose · Kotlin Multiplatform · Flutter · SwiftUI
AI
Amazon Bedrock · self-hosted vLLM · LangChain4j · RAG · embeddings · LLM evaluation
Practice
Technical leadership · mentoring · hiring · incident response · cost engineering

Contact

Let's talk

Available for technical leadership, platform and AI work.