Rostyslav

ROSTYSLAV SVISTULA
Backend Software Engineer
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SUMMARY
Backend Software Engineer with 3+ years building production Java / Spring Boot systems in enterprise environments.
Experienced in large-scale data migrations (20M+ records), event-driven architecture, third-party and government-registry
integrations, and GDPR-compliant services on Azure. Comfortable owning features end-to-end, from API design through
deployment and observability.

PROFESSIONAL EXPERIENCE
Backend Software Engineer | PosAm (ParkDots) Nov 2025 - Present
• Engineered a migration engine to move 20M+ records from Couchbase to PostgreSQL with zero data loss, reducing
operational database cost and improving query performance.
• Built an encrypted Azure Blob Storage service supporting EU data sovereignty and GDPR-aligned data handling.
• Delivered a data-migration service that transitioned legacy data into an encrypted state with zero downtime and high
availability.
• Upgraded legacy services to Spring Boot 4 and modernized dependencies, improving security and maintainability.
Full-Stack Software Engineer | PosAm Feb 2024 - Nov 2025
• Integrated insurance workflows with government registries to enable verified digital signatures and automated data
validation, cutting manual verification effort.
• Implemented an event-driven notification service with RabbitMQ for email and SMS delivery, processing ~100K
messages/month.
• Built backend and frontend for a vehicle damage-assessment app used by field agents, implementing offline-first sync and
automated PDF report generation.
• Developed API integrations that surfaced insurance products inside partner digital-banking apps, expanding distribution
channels across health, automotive, and property domains.
Backend Developer (Contract) | Automotive Service Business Aug 2022 - May 2023
• Built and maintained an internal service-management system covering bookings, repair workflows, inventory, and order
processing; contributed to architecture decisions, refactoring, and code reviews.
• Implemented RabbitMQ-based reminders and update notifications, reducing manual customer calls by ~40%.
• Integrated external car-parts supplier APIs to automate price checks, availability checks, and ordering, reducing
procurement delays and manual errors.
• Developed backend for appointment scheduling, repair tracking, and customer-profile management supporting daily
operations in a single system.

PROJECTS
Crudo — Meal-planning mobile app with automatic macro recalculation, calorie-floor targeting, and grocery-list generation.
• Flutter + Riverpod front end with a Supabase backend; designed the domain model and core invariants for reliable
macro/calorie recalculation.
Payroll Automation Pipeline — Photo-to-structured-data pipeline for industrial payroll processing.
• Vision-LLM extraction with fuzzy string matching (rapidfuzz), confidence-scored JSON output, and a human review layer;
Next.js + TypeScript front end.

EDUCATION
BSc, Computer Science | Technical University of Košice Sep 2022 - Jul 2025

SKILLS
Core: Java, Spring Boot, Java EE, REST APIs, Microservices, PostgreSQL, RabbitMQ, Liquibase, Docker, Azure, Event-driven
architecture, System integration
Also worked with: Kafka, Kubernetes (K8s), Apache Camel, Angular, TypeScript, OracleDB, Couchbase
DevOps & CI/CD: GitLab CI/CD, Jenkins, Git, Unix
Testing & Observability: JUnit 5, Mockito, Grafana, Prometheus