Development of new features, including new endpoints, and jobs for data migration and import. Assist SRE team in investigation of production issues. Technical design, estimation and planning of feature epics. Coordination with the front-end team for REST endpoint design. Performance optimization of SQL operations using the provided ORM. Maintenance: bug corrections and dependency upgrades. Culture of documentation, testing and collaboration. Organisation : Team with backend, front, QA, PO. Scrum: 3-week sprints: daily, retro, grooming, poker planning.

Feature development: Integrated new payment means (cash via scratch cards or qr codes, bank cards via Stripe), UI/UX redesign, integration of new products to buy. Customized the Braintree SDK to improve the 3DS validation UX for credit card purchases. Integrated A/B testing for credit card payments (Stripe vs Braintree vendors). Migrated legacy code to modern standards: migration of screens with all the logic in activities to MVVM, migration of Robolectric tests to Espresso, migration of AsyncTask to Kotlin coroutines. Modularized the monolith project to 60 modules, for a better organization of the code base, and elimination of cyclical dependencies. Implemented/integrated tools to improve the development of both iOS and Android platforms: generation of release notes on GitHub, monitoring of code coverage, monitoring the migration of the Oblective-C to Swift migration, Jenkins jobs to synchronize strings from Lokalise, Jenkins job to build a fork of libphonenumber for iOS. Organization: 1 release per month on average, daily with the mobile, backend, support, and QA, PR.

Develop features and maintain the Libon Android app, which provides phone calls to mobiles and landlines over internet (VoIP). Integrate and customize the Linphone SDK (NDK). Increased unit test code coverage from 25% to 88%. Modernize the code base with Kotlin migration, introduction of Google architecture components (LiveData, ViewModel), and other tools released by Google (ConstaintLayout, data binding). Integration of CI tools in a dockerized Jenkins: Pipeline, Sonar, Jacoco, deployment to HockeyApp and Nexus. Integration of the Google Billing library and other 3rd party billing solutions. Point of contact with providers of third-party SDKs. Publication on the Play Store. Organization: Feature teams and component team, PR, code review, Scrum: 2-3 week sprints, daily, retro, demo.

Customize the Ariba software for client needs. Led a team of two other developers. Clients: AXA, Alstom, BNPP, Société Générale, Decathlon, RTE, Sanofi-Aventis. Worked both at the client site and from the Ariba office.

Developed a software to monitor equipment in the RATP stations.

Customization of the Lumos Technologies network equipment monitoring software, which was acquired by Micromuse, for the customer Net.com.

Developed features for a network equipment monitoring software.

Customized the B-B homepage.com software for different clients.