Asset synchronization service (MF Connect). Member of core team and one of lead developers responsible for core functionality, architectural decisions, team mentoring.- Working with customers on technical issues.- Planning, designing features and overseeing the implementation by the team, mentoring.- Architecting and developing subsystems and features.- Implementing and improving (as a team) development standards, processes and automation reducing feature cycle time ~20%, issue resolution time ~61%, total number of reported issues ~30%.- Reimplementation of core subsystems which allowed the development of further features that were blocked by the original implementation (including distributed processing).- Optimization of software areas resulting in performance improvements ranging from ~20% to >300%.Major Technologies used: Java, SQL (PostgreSQL, Derby), MyBatis, Gradle, JUnit, Mockito, Docker, GitSoftware lifecycle management service (ALM Octane). Member of a new team responsible for enabling the interaction between devops and software development.- Reworking deployment code which streamlined configuration, deployment within Kubernetes.- Optimization of system and tooling improving the performance and responsiveness.- Taking over areas in a short time resulting in on-schedule delivery of dependent features.Major Technologies used: Java, Kotlin, Spring(Core, Web, JDBC), SQL (PostgreSQL, MSSQL, Oracle), Elasticsearch, Hazelcast, Maven, JUnit, Mockito, Docker, Kubernetes, Git

Payment system. Member of core team responsible for developing primary functionality that is used by external API users and internal projects.- Implementation, extension and support of core services. Provision of REST, gRPC external and internal APIs.- Implementation of generalized Kafka data streaming subsystem capable of live configuration which is responsible for message payload enrichment and routing.- Monolith architecture decomposition. Inter-service dependency analysis, dependency extraction and isolation, planning and extraction of logical modules to separate microservices.- Research and POC development of a high load payment system using Akka.- Feature leading, code review, root cause analysis, effort estimation.- Ground-up service setup and development. Implementation of PSD2/OpenBanking Standard.Major Technologies used: Java, Kotlin, Spring (Boot, Data, MVC, Security), Kafka, gRPC, Hibernate, Akka, PostgreSQL, MongoDB, Gradle, Liquibase, JUnit, Mockito, Docker, GitLab, Git

Service for location aggregation and promotion which helped people search places for their special occasions. Primary backend and frontend developer. Taking part in refining CI and delivery systems.- Implementation of new features. Integration with third party location providers. Improving product delivery system (Jenkins). Introducing Docker in a development environment.- Geo data processing. Implementation of template based engine for generating location contents. Implementing source-agnostic framework for location data importing.- REST service development. Provision of external and internal APIs.- FTS and General performance optimizations.- Auxiliary utility development in Python.Major Technologies used: Java (backend), PHP, JS, HTML/CSS (Frontend), Python, PostgreSQL, Spring (Core, Data), Hibernate, Hibernate Search, Apache Solr, Apache CXF, Wicket, Jenkins, Docker, SVN, JUnit