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Work Background
CalXSolutions Architect (Consultant)
Oct. 2024 - May. 2025- Led platform modernization, migrating legacy monolith to a modular microservices architecture on AWS ECS, migrating 2 legacy and 4 newly developed services to cloud-native deployment - Re-architected telephony infrastructure, replacing Plivo with Twilio, improving call reliability, API control, and integration flexibility for developer teams - Designed and delivered reusable service templates embedding NFRs: structured logging, centralized configuration, observability pipelines (logs, metrics, alarms), and security controls - Implemented centralized IAM architecture with Keycloak and OAuth2, replacing legacy authentication with consistent token-based identity management across services - Implemented a gradual migration strategy to ensure a seamless system transition with zero downtime. - Collaborated closely with product management, DevOps, and engineering to align architecture evolution with business priorities and operational readiness Tech Stack: Java, Kotlin, Spring Boot, Keycloak, Twilio, MySQL, AWS ECS, AWS CloudWatch, Docker
TechTellentSolutions Architect
May. 2023- Led full architecture redesign, migrating the platform to cloud-native microservices on AWS ECS, improving scalability, resilience, and fault isolation across 30+ services - Designed and delivered real-time streaming pipelines with Kafka, Kafka Streams, Debezium, and Spark, processing up to 6,000 events/sec and 800 requests/sec under peak loads - Built reusable service templates integrating observability (logs, tracing, metrics), security controls, and CI/CD automation, reducing new service onboarding complexity and standardizing deployments - Implemented centralized IAM architecture with Keycloak and OAuth2, replacing fragmented authentication with unified token-based security and audit traceability for regulatory compliance - Deployed full-stack observability platform (ELK APM, Grafana), cutting MTTR by ~50%, enabling rapid detection of performance bottlenecks and achieving 15–20% latency reduction in production - Refactored Apache Spark data pipelines on AWS EMR and Glue, improving processing efficiency by 40% while reducing compute resource costs - Defined and enforced architecture governance, led cross-team design reviews, mentored engineering teams on cloud-native design and operational best practices - Supported successful delivery of SOC2-aligned audit-ready architecture, collaborating closely with compliance, product, and engineering stakeholders Tech stack: Java, Spring Boot, Apache Kafka, Kafka Streams, Debezium, Apache Spark, AWS EMR, AWS Glue, AWS ECS, Keycloak, PostgreSQL, Cassandra, ELK Stack, ELK APM, spring cloud · Event Driven · Microservices · Distributed Systems · GitLab CI
Leading Africa BankSolutions Architect (Consultant)
Dec. 2022 - May. 2023- Led backend modernization, rebuilding critical services into a modular microservices architecture to improve scalability, resilience, and maintainability of core banking functions - Redesigned inter-service communication patterns using standardized messaging, distributed tracing, and observability pipelines, improving system reliability and cross-service fault detection - Implemented Saga-based distributed transaction coordination for money transfer flows processing 40,000+ transactions daily, ensuring data consistency and resilience across services - Developed a custom Maven archetype for service bootstrapping, reducing new service setup time by 1–2 weeks, enforcing architecture standards and accelerating delivery - Identified and remediated critical security vulnerabilities that had previously resulted in account-level losses, reducing fraud incidents by over 90% through targeted platform hardening - Built and managed Kubernetes infrastructure for orchestration, scaling, and automated deployments across containerized services - Designed CI/CD pipelines in Azure DevOps with integrated quality gates for secure, automated build, test, and release management - Aligned system modernization with banking regulatory compliance frameworks, collaborating closely with product, security, and compliance teams Tech Stack: Java, Spring Boot, WebFlux, Apache Kafka, Kubernetes, Docker, PostgreSQL, Azure DevOps
PragmaticPlayJava Software Engineer
Mar. 2022 - Dec. 2022Lviv, Ukraine- Designed and implemented a scalable promotion engine backend, processing 30,000+ daily rewards with complex business rules under high-load distributed microservices - Managed multithreading and concurrency control across 130+ service instances, ensuring stability under peak transaction volumes - Built reusable integration test frameworks resolving dirty context issues, improving test reliability and accelerating onboarding across multiple engineering teams - Developed internal admin tooling to streamline business operations and optimize configuration workflows - Operated within a production environment orchestrating over 50 microservices, collaborating across teams to maintain platform scalability and system health - Conducted advanced Spock-based automated testing to ensure consistent code quality across multiple feature teams Tech Stack: Java, Spring Boot, RabbitMQ, PostgreSQL, Oracle, Spock, Microservice
EntromySolutions Architect (Consultant)
Feb. 2022 - Sep. 2022Lviv, Ukraine- Led monolith-to-microservices architecture migration, transforming the platform into a modular, independently deployable system with improved scalability and delivery speed - Designed event-driven architecture with Kafka streaming pipelines, ingesting user interaction data into Neo4j graph models to visualize organizational networks and collaboration patterns - Built a custom JWT-based authentication layer, enabling secure, consistent inter-service communication across distributed services - Developed reusable service templates embedding full non-functional requirements (NFRs): observability (metrics, tracing, logging), security configs, health checks, and CI/CD automation - Decomposed monolith components into independently scalable modules, significantly reducing deployment risks and release complexity - Collaborated with product and engineering teams to align architectural evolution with advanced analytics requirements and customer-facing reporting capabilities Tech stack: Java, Spring Boot, Kafka, Neo4j, PostgreSQL, JWT, Docker, AWS ECS, GraphQL, AWS Bedrock, LLM, Anthropic Claude
GlobalLogicJava Team Lead
Jul. 2020 - Mar. 2022Lviv, Ukraine- Led development of a HIPAA-compliant healthcare platform, designing data encryption, security architecture, and regulatory-ready system design - Optimized AWS resource allocation, reducing infrastructure costs by 20% while maintaining system performance - Built real-time communication pipelines via WebSockets (STOMP) and distributed data processing using Spark Tech Stack: Java, AWS, GitLab CI, MySQL, MongoDB, Apache Spark, Redis, WebSockets
Svitla Systems, Inc.Lead Java Developer
Feb. 2020 - Jul. 2020Lviv, Ukraine- Architected real-time GPS and dashcam data pipelines, enabling scalable fleet management and geolocation services - Consolidated geo-fencing architecture with Redis & Lua, reducing compute resource usage from 10 service instances to 1 - Designed event-driven processing pipelines using AWS Lambda, Kinesis, and SQS for scalable event ingestion Tech Stack: Java, C++, PostgreSQL, Redis, Lua, MyBatis, AWS Lambda, Kinesis, SQS, API Gateway, Bitbucket C
EPAM SystemsResearch And Development Engineer
Nov. 2017 - Feb. 2020Lviv Region, UkraineCouple of different projects for Adidas - Led delivery of Track & Trace system ensuring global regulatory compliance for product lifecycle tracking - Designed and implemented custom security solution for ELK stack - Build EPAM competency in SDL Tridion CMS
VreasySenior Java Software Engineer
Mar. 2014 - Nov. 2017Lviv Region, Ukraine- Developed and maintained microservices architecture for real-time property booking and management workflows - Implemented enterprise integration patterns with Apache Camel, JMS, and WebSockets for real-time event propagation Tech Stack: Java, AngularJS, AWS, Apache Camel, JMS, SSE, WebSockets, Circle CI
DevComSystem Administrator
Feb. 2014 - Aug. 2014Managed high-availability server infrastructures, implemented monitoring and automated backup solutions
Nexans autoelectric GmbHsystem administrator
Aug. 2011 - Feb. 2014
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