Portfolio

— Supporting and evolving a distributed backend system serving tens of millions of users daily
— Worked within a high-load, high-regulation environment with demanding uptime requirements
— Participated in architectural decisions, performance audits, and deep refactoring initiatives
— Implemented and maintained microservices using Java + Spring Boot, with Hibernate and JPA
— Optimized PostgreSQL queries and schema design for high-throughput operations
— Integrated Apache Ignite as distributed cache for in-memory compute
— Maintained Redis-based subsystems and Kafka-based asynchronous workflows
— Worked with Dockerized services orchestrated in Kubernetes clusters
— Built and improved CI/CD pipelines based on Jenkins and Git

— Consulted a financial institution on building a personalized recommendation system for retail banking
— Conducted audit of business requirements, technical constraints, and data flows
— Selected optimal tech stack and evaluated AWS services for scalable and compliant deployment
— Designed a distributed, event-driven architecture leveraging microservices, message queues, and stateless compute
— Proposed integration strategy with existing systems, including authentication, customer data layers, and analytics pipelines
— Provided guidance on observability, fault tolerance, async processing, and horizontal scaling
— Delivered architectural documentation, PoC outlines, and roadmap for implementation

Focus areas:
Cloud-native design, cross-system integration, asynchronous architecture, layered caching, data lake readiness, compliance-by-default

— Worked on core services used by millions of end-users in the financial sector
— Maintained and extended high-load backend systems within regulated environments
— Collaborated with product teams to deliver new features with strict compliance alignment
— Designed and optimized PostgreSQL queries for mission-critical operations
— Containerized legacy services using Docker and improved CI/CD processes
— Followed strict audit and security procedures while ensuring delivery speed

— Led a cross-functional team through full product cycles
— Launched major features: task kanban, website builder, AI integrations
— Migrated services from MySQL to PostgreSQL
— Improved delivery pipelines and introduced infrastructure monitoring
— Integrated AWS services for storage and scalability
— Scaled internal services to support tens of millions of users
— Advocated Agile practices and refined team planning processes

— Worked on core B2B/B2C modules in high-impact product areas
— Participated in strategy meetings with partners and stakeholders
— Represented the company at external conferences (incl. Skolkovo)
— Delivered key features used by millions of Bitrix24 users globally
— Collaborated with UX and product teams to align dev output with business goals

— Designed and built a gamified chatbot for public promotional quizzes targeting Hilti clients
— Used in marketing campaigns across regions to increase brand engagement
— Supported dynamic question sets, scoring, rewards, and live leaderboard
— Handled thousands of unique sessions during peak campaign periods
— Delivered complete UX: from entry point to final results and prize distribution
— Fully self-hosted, lightweight backend, with real-time updates and analytics

— Created 70+ Bitrix24 marketplace applications (including paid and partner-integrated)
— Apps installed on over 200,000 client web-sites and portals worldwide
— One of the top apps reached 100,000+ installations
— Built solutions for CRM, automation, integration, analytics, UI extensions and more
— Covered full lifecycle: development, deployment, support, billing, updates

— Built and launched the new company website from scratch
— Integrated multiple distributors into a unified internal system
— Handled server setup and system administration
— Used AWS (S3, EC2) for media storage and infrastructure scaling

— Delivered custom websites for multiple clients using Bitrix CMS
— Handled full-cycle implementation: layout, integration, and deployment
— Met tight deadlines without sacrificing quality
— Maintained direct communication with clients — consistently positive feedback
— Built strong foundations in practical full-stack delivery under real constraints