Hamed Z. - Senior Software Engineer | Distributed Systems Specialist | JVM Expert

Muscat, Oman

Experience

Jan 2025 - Dec 2025

1 year

ERP Integration – Architecture & Implementation

Designed and implemented an integration layer to connect a legacy ERP system (SQL Server, Microsoft tech stack) with modern external services used by a mobile after-sales application.
Developed a robust architecture based on Change Data Capture (CDC) to ensure real-time, consistent data synchronization between the ERP backend and service endpoints.
Enabled seamless two-way communication between mobile clients and ERP by abstracting core business operations such as order status, updates, inventory changes, and service logs.
Improved data reliability and consistency across systems by applying event-driven patterns and transactional guarantees around change propagation.
Empowered the mobile team to deliver real-time after-sales support features without direct coupling to the ERP's internal logic.

Jan 2022 - Dec 2025

4 years

United Kingdom

Beauty Platform

YUV UK

Worked in synergy with a diverse team to delineate the workflow and ascertain the best strategy for each service implementation.
Participated in a cross-functional team to establish the work breakdown structure and pinpoint the most efficient approach for each service provision.
Collaborated with peers from different departments to formulate the project roadmap and choose the most effective techniques for delivering each service.
Performed business analysis and architected a data model to facilitate both client-facing interactions and internal administrative tasks.
Examined business operations and constructed a data model to streamline data flow for both external services and internal operations.
Established a multi-tiered environment using Google Cloud to automate the software development lifecycle, including development, testing, and deployment stages.
Utilized cloud events for auditing activities and validating transactions for system-defined product usage.
Utilized Google Cloud services (Cloud SQL, App Engine, Firebase, PubSub, Cloud Run, etc.) to build and deploy resilient, multi-tiered applications.
Designed a Google Cloud-based, multi-environment framework for efficient software development processes, encompassing integration, testing, and delivery stages.

Jan 2017 - Dec 2022

6 years

Trading Platform & OMS

Vestun

Led the design, architecture, and development of a high-performance trading platform integrated with equity, futures, options, and crypto exchanges, designed to process over 10k ticks per second per server.
Processed market data, news, and other real-time feeds to enable robust, data-driven decision-making.
Connected trading strategies to the core platform using socket communication and REST APIs for low-latency execution.
Developed a comprehensive dashboard for reporting, monitoring, and order management.
Leveraged a modern microservices architecture with three core subsystems: data warehouse & storage engine, core trading engine, and dashboard.
Implemented RBAC using Spring Security to enable fine-grained permission management and user isolation across platform roles.
Utilized Spring Boot, Spring Data, and Spring Cloud to develop scalable and maintainable services with seamless integration and centralized configuration.
Achieved high scalability, performance, and low latency through efficient API design, asynchronous communication, and containerized deployment.

Jan 2015 - Dec 2015

1 year

Messaging App and Real-Time Services

Saba Idea

Developed a real-time chat Java NIO server for coloob, enabling seamless in-platform messaging at 8k messages per second per node.
Leveraged optimized core system design and engineering for efficient scaling and smooth user experience on a 4-core CPU with 4GB RAM.

Jan 2014 - Dec 2018

5 years

Real-Time As a Service Platform

Abrin

Designed a highly resilient and scalable messaging infrastructure capable of handling 60,000 messages per second per node.
Leveraged lightweight threads and the actor model to simplify complex concurrency issues and facilitate performance monitoring.
Optimized a high-throughput messaging protocol and serialization to enable data synchronization at a rate of 2 million messages per second across geographically distributed systems.
Implemented multi-layered data abstraction to simplify queries and aggregation across diverse caches and databases, streamlining big data processing and analysis.
Developed a custom stress test toolkit leveraging Netty to identify performance bottlenecks and gracefully handle failures under extreme load.

Jan 2013 - Dec 2014

2 years

Team Lead, Mobile Banking

Hafez fanavaran

Led the successful launch of a mobile banking app adopted by 50,000+ users, offering services like transfers, loans, and card management.
Implemented robust encryption (symmetric/asymmetric) and in-branch activation for enhanced security.
Built core banking transactions on Spring Framework and Spring Integration with Oracle as the backend database.

Jan 2013 - Dec 2013

1 year

Software Developer

Contributed to mobile banking app development focusing on UI/UX across JavaME and Android devices.
Implemented RTL language support (e.g., Persian) on devices lacking native support.
Ensured data security through local encryption and secure server key exchange.

Jan 2013 - Dec 2013

1 year

Payment Solution Developer

Melli Bank

Contributed to Azarakhsh QR-based mobile payment system, replacing physical cards.
Engineered offline payment functionality using low-level Bluetooth packets and time-sync services, supporting Bluetooth on Android and Java ME, with WiFi compatibility across platforms including iOS.

Jan 2012 - Dec 2012

1 year

Traffic Equipment Management System

Designed and developed a city-wide system for managing traffic equipment and services.
Contributed to workflow and data model design for a tablet-based field app and backend management system.
Built reporting tools for stakeholders using Android, Java REST APIs, EJB, SQL Server, GlassFish, and Hibernate.

Jan 2009 - Dec 2011

3 years

Web Application Development (Java EE)

Built and enhanced applications using Java EE technologies (EJB, JAX-WS/RS, JPA, DI) on the JBoss platform.
Employed design patterns, unit testing (JUnit), SQL/JDBC, and frameworks like Hibernate and Spring for persistence and application layers.

Jan 2008 - Dec 2009

2 years

Remote

Eclipse Plugin & Modular Java Development

Built advanced Eclipse plugins with remote update, web UI, and native library support using RCP for cross-platform UI.
Applied modular design with Equinox and Java Project Jigsaw.

Jan 2007 - Dec 2013

7 years

Mobile Application Development

Developed mobile apps across Java ME and Android with multi-platform support for Android, iOS, BlackBerry, Symbian, and Windows Phone.
Built secure networked apps over GSM/GPRS, low-power Kerberos-based clients, and TCP/Bluetooth communication systems.
Created GPS-enabled location and routing apps.
Developed a PaaS solution enabling users to design and deploy native cross-platform mobile apps via web services.

Jan 2006 - Dec 2007

2 years

Desktop Application Development

Developed cross-platform desktop applications using Swing, focusing on rich UI/UX and seamless integration with internet-based RIA services.

Jan 2005 - Dec 2006

2 years

Web Development

Built interactive, user-friendly web pages using HTML, CSS, and Flash.

Summary

Full-stack architect with 18+ years of experience across diverse domains including fintech, cloud services, and mobile platforms.
JVM and concurrency optimization expert with deep knowledge of actor-model programming and real-time data pipelines.
Specialized in scalable enterprise application design using Java EE, Akka, and cloud-native technologies.
Proven ability to lead cross-functional teams and deliver high-impact systems with measurable results.