Java Services

Web application software service

Applause

- Developing new product features for the high-volume single page application applying knowledge of Java 11, Node.js and Angular.
- Improved web application performance and UX with migrating 90% of the codebase from Angular.js to Angular 11 and leveraging its optimization potential.
- Reduced web application tech debt by moving deprecated midtier backend calls to dedicated app BFF and upgrading codebase to Typescript.
- Optimized web development lifecycle by migrating two web applications from their own repositories to central web-app monorepo.
- Increased chat application unit test coverage from 21% to 78%.
- Moved platform application queue traffic from AWS SQS to RabbitMQ resulting over 30% cost reduction spent on external queue service.

Full Stack Developer

EY GDS

- Developing new and customization of the existing features for the multi purpose web application using Java and Angular 7. Focused on document automation module.
- Improved developer and end user experience migrating UI from Thymeleaf to Angular.
- Integrating with third-party services and external APIs as a part of implementation of the critical backend component providing authentication feature with SAML2 protocol.
- Participating in peer code reviews for the mission-critical online service maintaining code and design consistency across different team members.

BDSolutions

- Design and implementation of Godly mobile application with strict cooperation with the UX and graphics department.
- Setup the processes of releasing and distributing the application to the Google Play store.

Mobile Developer

X-Trade Brokers

- Initiative and implementation of an application for managing client content and application translations, which resulted in the possibility of changing application translations at any time and synchronization between environments.
- Modernized key web application for customers by updating web technologies from jQuery / Velocity to Angular.js resulting in increase in user retention.
- Introduced two-way communication using Websockets to a critical web application, which allowed the client to be informed about the status of his operations in real time.
- Increasing the productivity of Java programmers by introducing the JRebel tool to reload the code without restarting the application.
- Design and implementation of new cross-system functionalities in cooperation with other project teams.
- Performing the role of the technical leader of the team during the last months of work.
- Monitoring, troubleshooting, debugging and bug fixing of the applications.
- Integration with several online payment providers, providing customers with additional channels for card payments or using banking systems, which translated into an increase in the amount of deposits in transaction accounts and the company’s profit.
- Integrating with internal services and APIs (i.e. CRM or trading system) as a part of
implementation of the mission-critical backend application for processing client account related operations resulting in shortening the time of creating an account by over 90%.
- Developing and maintaining internal libraries and API clients.
- Introduced a system of calculating commissions on deposits made, which allowed to reduce the cost of servicing payment systems.
- Performance tuning of the business-critical application database for asynchronous
processing using Hibernate improving query execution time by 30-60% and overall system response time.
- Design, implementation and deployment of a central client database, which allowed to reduce data duplication among the internal systems.
- Creating internal tools for monitoring the activity of logged in users with the use of JMX.
- Experimenting with front-end frameworks for business-critical accounting application that helped to boost project development efficiency.
- Using tools for static code analysis and elimination of blocker, critical, and major issues from critical business application.
- Mentoring and couching newly hired team members and juniors resulting in over 50% of onboarding time decrease.

Software Developer

Xentivo

- Preparation of the MVP application for submitting electronic applications for funding under the European Entrepreneurship Development Program.
- Developing new and customization of the existing features for the document management application based on open source NuxeoDM and commercial Documentum platforms.
- Coordinated with engineering and product teams in the identification of customer requirements for the document management application.
- Conducting training on the use of the application for end users.
- Preparation and implementation of a demo application for potential clients.

Java Programmer

Fullstack developer

Vakifbank LTD/Turkey

Involved the Vakifbank VIT (Vakifbank Innovative Transformation) core banking system transformation from mainframe systems into distributed systems. Redesigned the existing payment system which integrated with more than 500 payment companies (electric, water, gas, university, tax) into a dynamic payment system, including multiple payment types (credit card, debit card, cash) via all payment channels (internet, mobile banking, branch, ATM). Integrated direct debit system for regular payments. The system has the capability to handle 1M transactions, multithreaded at a single run with improved performance and efficiency. Participated in recruiting activities. Improvements were made using WPF, WCF, C#.NET, .NET Core, Oracle, MVVM, MVC, TFS, ALM.

Core Payment System

Teknoritma Software Services LTD

Managed the digital transformation for this leading provider of technology solutions for the healthcare sector. Moved core data, converted content as necessary, and mitigated risks. Improvements were made using C#.NET, .NET Core, Angular, Power Designer, MVC, SQL Server. 

Hospital Integrations

Acute Art

- Create an interface to streamline app use with Angular 11
- Maintain existing code while developing new features

Full Stack .NET Developer

HITZone Hove

Developed the user training and follow-up system by integrating the KPI and performance analysis for the members and improvement progress charts.

User training and follow-up system

FirstRate Exchange Services

- Developed the new mobile middleware with the Post Office with integrating the current money exchange operations and added new features in 4 months.
- Implemented new features, resolved performance bugs and improved the app fabric cache performance of the main system for the Post Office Travel Money Card / Travel Money Order / JLP Money Exchange / Santander Money Exchange and Bank of Ireland Money Exchange systems.
- Implemented the new transformation of the back office, branch data management, stock management and reference data management, stock data management and rates data management systems.

Expert, freelance JSON engineers