Senior Java Engineer/Architect

Achieved a remarkable 90% reduction in instances of undelivered goods, which were initially believed to be in stock.

Elevated on-time delivery rates by a substantial 70% through implementing advanced Java Technology. This involved generating precise stock projections and delivery timelines, contributing to improved customer satisfaction.

Secured an impressive profit surge of 70 million by architecting a dependable, high-performance microservice. This microservice was crafted with a test-driven approach, achieving an impressive 85% test coverage, ensuring reliability and functionality.

The client, a prominent retail corporation, aimed to enhance customer interaction and drive revenue growth. Consequently, they created a novel application that delivers real-time stock updates and suggests alternatives for out-of-stock items.

Skills: AWS, Java 17, Spring REST, Hibernate, JPA, Spring Boot, Spring Batch, BDD Mockito, Swagger3, Jira, Confluence, Docker, Webflux, Datadog, Spring Security with JWT Tokens

Unlocked the potential of an extra $700m in sales in Q1 of '21 by leading a full architectural revamping process, thus enabling 1-2 day delivery time for new feature requests (instead of weeks) while keeping infrastructure costs to a minimum.

Increased app performance by having 4x faster API calls while using 25% less memory and 30% fewer database calls.

Internet speed skyrocketed from 100GB/s to 400 GB/s.

Ensured 100% stability in migration and zero major incidents by implementing a test-driven development approach, achieving over 80% code coverage.

The client, Colt Technology - a world-class global network and voice provider, failed to increase revenue and provide contentment to existing clients due to accumulated technical debt due to a bad architectural design.

Skills: Java 8, Spring JPA, Spring Boot, Elastic Search, DDD, BDD Mockito, Junit5, Kafka, Oracle Sql NoSQL, Swagger3, Feign clients, SOAP, Microservices, Linux systems, Jenkins, Rancher CI/CD

Designed an application with three times faster response time, by discovering and fixing bugs, adding key database retrieval optimizations, reducing cyclomatic complexity, and designing efficient caching that resulted in

A significant impact on the increased 2019 revenue with 11.7%, resulting in total revenue of $2.391 billion for this year.

The client, Medtronic - a global leader in medical technology, had a high debt after a massive investment in a real-time patient monitoring app that could not produce any income due to bugs causing crashes and inefficient code.

Skills: Java 8, Hibernate, ActiveMq, JPA, MySql, Thymeleaf, Spring MVC, Spring, SCRUM, Tomcat, Git

Drastically increased performance 10 times by redesigning the full application with modern technologies and a stable database design.

Achieved startling stability and scalability in record time, handling 10k concurrent sessions effortlessly by building and leading a fast-paced team of 5 people into fully redesigning the architecture from the ground up to meet business requirements having separate environments for dev & demo deployments.

Ensured a successful KPMG acquisition by being a key player in the sales process, holding technical presentations and contributing to marketing discussions.

The client as the owner of a real-time office feedback app, did not manage to acquire customers due to slow and unstable application, crashing under 100 concurrent users.

Skills: Java 8, Spring Boot, MySql, Spring with RESTful Apis, Hibernate, JPA & Security, Maven, Spring Security

Drastically increased the company's income from $40M to $100M annually by designing a highly efficient algorithm to collect and aggregate the needed data, leading to a successful release in 2013.

The major increase resulted in selling the company to Facebook with $500M in 2014.

The online advertising company's client, now part of Facebook, struggled to accelerate its income growth due to a lack of critical reports on viewers' profiles for ad targeting and the real-time number of delivered ads.

Skills: Java, threading, java nio, Netty, TCP, UDP, HTTP, SVN, Java Sax Parser, Spring Security, JWT Tokens, Kafka Streams