Serhii C.

2K Group develops scalable software solutions for enterprise eCommerce and digital retail systems, enabling personalized product discovery and intelligent search experiences.

• Contributed to the design and implementation of the eCommerce search and recommendation experience using GCP Retail Search and Mongo search engines:
• Built high-volume catalog ingestion pipelines for near-real-time updates
• Delivered search, recommendation, and personalized product discovery features with high customizability
• Developed high-throughput analytics pipelines for user events using Go, Pub/Sub, and BigQuery
• Implemented LLM-driven conversational search using RAG pipelines, embeddings, and LangChain4j
• Managed multi-tenant, multi-deployment architecture across a “zoo” of GCP projects, ensuring reliability, scalability, and cost-efficient operation
• Expanded into architectural responsibilities:
• Proposed and created technical designs for new features and system improvements
• Led technical direction and decision-making within cross-functional teams
• Provided team leadership for side-stream initiatives, mentored developers, and drove the delivery of complex features

Norse Digital offers data-driven solutions for optimizing transportation, infrastructure, and logistics.

• Designed and implemented a geospatial analytics platform to evaluate road quality and infrastructure health.
• Built pipelines for data ingestion and transformation from road scanners and IoT devices.
• Developed a map tile generation and visualization service in Golang, improving map rendering performance by 50%.
• Created RESTful APIs for map data access and aggregation, powering client dashboards and reports.
• Integrated PostgreSQL with PostGIS for spatial queries and geospatial indexing.
• Automated deployment workflows using Docker and GCP, ensuring scalability and reliability.
• Implemented event-driven updates for streaming geolocation data from field sensors.
• Collaborated with government agencies to ensure data privacy and compliance in public-sector deployments.

Delivered end-to-end backend and cloud automation for medical technology companies.

• Designed and deployed automated patient data integration from CPAP machines (Philips, ResMed) for sleep clinics.
• Built AWS Lambda microservices to handle device synchronization, data normalization, and processing.
• Integrated insurance claim APIs (Athena Health) for automated submission and verification workflows.
• Implemented authentication and authorization flows using AWS Cognito and OAuth2.
• Managed DynamoDB schemas and S3 data storage for secure, HIPAA-compliant processing.
• Wrote infrastructure-as-code templates to manage AWS environments and monitoring policies.
• Built unit-tested APIs for clinical dashboards to visualize aggregated patient metrics.

Provectus is a global engineering firm building AI and data solutions for enterprise clients.

• Maintained and enhanced a multi-channel eCommerce platform for a major global fashion retailer.
• Designed and implemented APIs and microservices in Java and Spring Boot, supporting both retail and rental systems.
• Developed streaming and batch data processing pipelines using Kafka and Pub/Sub for catalog synchronization.
• Improved system reliability and observability by integrating monitoring dashboards and alerting systems.
• Managed cloud deployments on AWS using ECS and Lambda for hybrid compute workloads.
• Led a feature development stream, mentored junior engineers, and supported team performance reviews.
• Coordinated cross-team collaboration with QA and DevOps to ensure seamless release cycles.
• Contributed to architecture modernization, improving fault tolerance and reducing downtime by 40%.

Mera Systems provides IoT and M2M network solutions for utility management companies.

• Developed data aggregation pipelines for electricity, water, and gas meter networks.

• Implemented automation scripts for device setup, clustering, and network discovery.

• Designed backend services for remote meter configuration and firmware updates.

• Developed reporting modules providing real-time energy usage analytics to enterprise clients.

• Integrated RabbitMQ for message-based communication between distributed nodes.

• Improved fault-tolerance in M2M communications through optimized retry and recovery mechanisms.

LanitBPM is a business process management (BPM) software vendor focused on enterprise digital transformation.

• Developed a Java-based BPM suite integrating Drools, Activiti, and Alfresco.

• Built workflow automation for loan and document processing.

• Integrated document storage and retrieval with Alfresco ECM and custom REST APIs.

• Designed a rules engine using Drools for process automation and compliance validation.

• Supported performance tuning and deployment scripting in production environments.

• Collaborated with clients to customize workflow configurations and reporting layers.