Ștefan-Octavian ROȘU

Full-stack developer across business-critical internal applications — payment orchestration, an Engineering Platform, and Regulatory Reporting — improving cross-border payment flows, engineering auditability, and compliance reporting bank-wide.

• Helped build a payment-orchestration integration with WISE on the latest Java 21 / Spring Boot stack, enabling cross-border payment flows through the bank's orchestration layer.
• Sole developer on a new top-up capability, integrating multiple internal Raiffeisen systems — including 3D Secure authentication — end to end into a single, reliable flow.
• As the sole developer, worked closely with the solution architect and business analyst and kept communication open with all integration partners, aligning requirements and resolving dependencies early to keep delivery running smoothly.
• Owned delivery on a modern GitOps pipeline — GitHub Actions with Kargo and Argo CD promoting releases across environments on the internal Mercury platform, Docker-containerized databases, and Grafana for monitoring and observability.
• Leverage Claude (Claude Code), GitHub Copilot, and an internal ChatGPT as AI pair-programmers to accelerate delivery on the WISE integration and the top-up project I'm currently building — scaffolding, refactoring, test generation, and code review.

• Co-built a unified internal developer platform with Java 21, Spring Boot, GraphQL, Neo4j, and Angular, replicating GitHub-like capabilities to give the organization full audit visibility over engineering activity.
• Integrated Git webhooks and GitHub Actions to automate data ingestion, removing manual steps from the auditing pipeline.
• Designed custom features and modeled relationship data in Neo4j to make cross-repository auditing fast and queryable.
• Implemented back-end integration tests and front-end unit tests to keep the platform stable as it scaled across teams.

• Built end-to-end regulatory-reporting flows with Angular, Java 17, Kotlin, and Spring Boot, delivering features from UI to database that supported recurring submissions to financial regulators.
• Refactored and optimized PostgreSQL stored procedures spanning tens of thousands of lines, reducing report-generation time and eliminating recurring data-accuracy defects.
• Evolved PostgreSQL schemas to meet changing regulatory requirements while keeping the production system backward-compatible and audit-ready.
• Authored back-end unit tests that raised coverage on critical modules and prevented regressions in compliance calculations.

Senior back-end engineer delivering Java 17 microservices for two enterprise clients — Edenred and Deutsche Bank — focused on scalability, data integrity, and clean API contracts.

• Developed REST features end to end (controller → service → repository) in Java and Spring, powering customer-facing flows on a high-volume payments platform.
• Designed and optimized PostgreSQL structures for customer data, improving query performance and safeguarding data consistency.
• Defined and refined API contracts with front-end developers, reducing integration rework and cutting back-and-forth during delivery.
• Wrote unit and integration tests (Mockito) that validated business logic and protected releases through the Jenkins pipeline.

• Engineered microservice features end to end in Java 17 and Spring within a large-scale banking architecture, integrating with Elasticsearch and the Fusion stack.
• Modeled and optimized data structures to meet strict performance and reliability requirements for financial workloads.
• Established clear API contracts with front-end teams to keep services loosely coupled and independently deployable.
• Built comprehensive unit and integration tests to ensure code reliability in a tightly regulated environment.

Senior back-end engineer building Java 8 / Spring services for managed service providers (MSPs), with delivery containerized via Docker and Kubernetes.

• Engineered and maintained high-performance REST endpoints in Java and Spring, serving MSP-facing features at scale.
• Improved database efficiency through targeted data modeling, reducing latency on frequently hit queries.
• Diagnosed and resolved critical server-side issues, stabilizing production behavior under load.
• Built a proof-of-concept for MSPs in collaboration with stakeholders, shaping requirements that fed into the production roadmap; backed work with unit and integration tests (Mockito).

Back-end developer on an automotive software project, delivering reliable Java 8 / Spring services for a global manufacturer of turbocharging and electrification technologies.

• Developed and supported robust REST API endpoints in Java and Spring, delivering features against automotive-domain requirements.
• Designed efficient database schemas that kept data access fast and maintainable as the project grew.
• Troubleshot and resolved server-side issues, improving the stability of the running services.
• Ensured quality through unit and integration testing (Mockito) ahead of each release.

Full-stack developer on an enterprise e-commerce platform, delivering end-to-end features with Java 8 and Spring while deepening expertise across the SAP ecosystem.

• Built and integrated features from front-end to back-end in Java / Spring, owning slices of functionality through to release.
• Diagnosed and resolved critical server-side defects, improving reliability of customer-facing flows.
• Safeguarded functionality with unit testing (Mockito) as part of the delivery workflow.
• Completed an intensive Spring Course and an internal Angular Course to deepen framework and front-end expertise.

Back-end developer across two projects: a financial application built on Java 8, Spring, and microservices, and a SAP Hybris e-commerce solution.

• Developed and maintained microservice endpoints in Java / Spring, supporting a scalable financial application.
• Built Apigee API flows to strengthen API management, security, and gateway routing.
• Debugged and resolved critical server-side issues to keep services dependable in production.
• Validated system integrity with unit and integration testing.

• Enhanced Product Detail Pages (PDP) and Product Listing Pages (PLP) on the SAP Hybris commerce platform.
• Resolved SonarQube findings to raise code quality and reduce technical debt.
• Troubleshot server-side defects to maintain catalog performance; completed a 3-week SAP Hybris Bootcamp.

Focused on bug fixing and content updates for existing applications, enhancing functionality and user experience.

• Resolved defects in Java EE applications to align functionality with acceptance criteria.
• Designed and implemented new web pages for existing systems using HTML, CSS, JavaScript, and jQuery.
• Updated web content to meet evolving client requirements.

Developed interactive web pages and enhanced existing functionalities to meet client specifications.

• Created interactive educational wizards using HTML, CSS, JavaScript, jQuery, and Bootstrap.
• Built presentation websites with Joomla for rapid deployment.
• Updated websites to align with client requirements.

Conducted rigorous testing of video games across two seasonal engagements, documenting issues in JIRA to ensure high-quality releases.

• Executed diverse testing scenarios to identify defects across multiple titles.
• Logged detailed issues in JIRA and designed dashboards to enhance issue tracking.
• Compiled daily reports and edited videos/photos to clarify reported issues.