Simonas Jacevicius

Designed and implemented a multi-tenant SaaS backend architecture

using PostgreSQL with role-based access control and transactional

workflows.

Developed backend services and automation systems using

TypeScript, Supabase, and Edge Functions.

Integrated Stripe subscription billing, webhook handling, and

automated customer lifecycle management.

Built AI-powered workflows using OpenAI APIs and SERP data

providers for content automation and SEO-related systems.

Implemented scheduled background jobs and cron-based processing

for automated platform operations.

Worked across backend architecture, API integrations, database

design, and cloud-based deployment workflows.

Developed REST APIs using Spring Boot and PostgreSQL for

backend business systems.

Designed layered application architecture using controllers, services,

repositories, and DTO separation.

Applied dependency injection, transactional service design, and

clean architecture principles.

Wrote unit tests using JUnit and Mockito to validate business logic

and improve reliability.

Containerized backend applications using Docker for deployment

consistency and scalability.

Collaborated on backend feature development and API integration

workflows.

Conducted data analysis and reporting in a remote international environment, developing analytical and problem-solving skills relevant to backend development.