Arek P.

SEBES Technology is a fintech company building payment integration and financial-service systems.

• Developed and maintained Rails-based payment integration services using a modular, engines-based architecture
• Implemented end-to-end payment workflows covering authorization, status polling, refunds and reversals, webhook handling, and redirect flows
• Integrated external payment and banking providers using SOAP/XML, ensuring secure credential handling and operational traceability
• Improved data consistency and resolved production issues across payment workflows throughout the development and deployment lifecycle

ENOCLink is a UAE mobile fuel delivery and logistics platform coordinating trucks, drivers, B2B customers, stock, routes, orders, and reporting.

• Designed and maintained Rails API workflows supporting operations, driver management, fleet management, scheduling, business orders, route planning, and reporting
• Modeled complex PostgreSQL domains for load and compartment orders, deliveries, inventory transactions, ATG measurements, and reconciliation analytics
• Implemented asynchronous processing with RabbitMQ, MQTT, and Sidekiq to handle register transactions, device status updates, ATG readings, and RFID events
• Built bidirectional communication between trucks and field devices, processing inbound telemetry from fuel registers and RFID readers while sending outbound commands for device configuration and receipt printing
• Contributed to Kafka and Karafka integrations, publishing Protobuf-based invoice payloads for downstream invoice processing
• Supported multi-tenant, sharded architectures by resolving tenant context and routing requests to the appropriate PostgreSQL shard
• Owned CI/CD pipelines and production deployments using CircleCI, Helm, Kubernetes, Docker, Terraform, and Azure and AWS

Naturaily is a software agency delivering e-commerce, SaaS, and custom web applications for clients.

• Designed and developed RESTful APIs and backend features for e-commerce, SaaS, and custom web applications
• Optimized PostgreSQL queries and implemented backend business logic to ensure reliable application performance
• Deployed applications to AWS and Heroku, establishing maintainable and repeatable deployment processes