Stefan Catalin-Paul Email & Phone Number

Cluj-Napoca, Cluj, Romania

𝐅𝐚𝐜𝐢𝐥𝐢𝐭𝐲 𝐌𝐚𝐢𝐧𝐭𝐞𝐧𝐚𝐧𝐜𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧🔶 𝘊𝘰𝘳𝘦 𝘙𝘦𝘴𝘱𝘰𝘯𝘴𝘪𝘣𝘪𝘭𝘪𝘵𝘪𝘦𝘴: 🔸Developed an integrated exception handling framework for REST controllers, gRPC service methods, and model validations using exception filter attributes, request interceptor middleware, and FluentValidation. 🔸Created Apache Kafka processors and consumers, integrating with message processing systems. Used for features like bulk document upload/validation, digital signing, retry mechanisms, and DLQ 🔸Implemented real-time CDC and replication slots in PostgreSQL, developing services to monitor database changes 🔸Enhanced big data performance with REDIS cloud caching, batching strategies, and optimized SQL/LINQ queries 🔸Upgraded backend communication, replacing REST with gRPC endpoints for improved performance◆ 𝘈𝘥𝘥𝘪𝘵𝘪𝘰𝘯𝘢𝘭 𝘙𝘦𝘴𝘱𝘰𝘯𝘴𝘪𝘣𝘪𝘭𝘪𝘵𝘪𝘦𝘴: ♦ Developed RESTful APIs and gRPC services using Protobuf for client and server communication. ♦ Managed SQL stored procedures, indexes, and database migrations using SQL scripts and Entity Framework. ♦ Utilized Elastic Search and Amazon S3 for object storage ♦ Crafted NuGet packages for document upload processes and data validation ♦ Authored Kubernetes deployment templates for Argo Workflows ♦ Proactively established a collaborative Postman workspace for API management, which led to greater efficiency, maintainability, and transparency between cross-team/systems collaborations ♦ Conducted code reviews, peer programming, and documented database structures and application workflows🔷 𝘛𝘦𝘤𝘩 𝘚𝘵𝘢𝘤𝘬: 🔹C# (.NET Core, LINQ, Auto Mapper, Zonkey ORM, and Entity Framework EF Core) 🔹Apache Kafka (queue messaging, topics, processors, and consumers) 🔹REST APIs, gRPC endpoints(Protobuf interfaces), PostgreSQL CDC, MongoDB 🔹REDIS Cache, Elastic Search, Amazon S3 Object Storage 🔹Argo Workflows (Kubernetes deployments)

𝐖𝐞𝐛3 𝐑𝐞𝐚𝐜𝐭 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐃𝐚𝐭𝐚 𝐒𝐭𝐫𝐞𝐚𝐦𝐢𝐧𝐠 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐄-𝐅𝐨𝐨𝐝 𝐑𝐞𝐭𝐚𝐢𝐥 𝐒𝐡𝐨𝐩𝐢𝐟𝐲 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦🔶 𝘊𝘰𝘳𝘦 𝘙𝘦𝘴𝘱𝘰𝘯𝘴𝘪𝘣𝘪𝘭𝘪𝘵𝘪𝘦𝘴: 🔸Improve UX styling for existing UI client-facing components, and make them mobile responsive. 🔸Develop new reusable UI components such as lists, forms, etc. 🔸Communicate with back-end REST APIs using Axios requests. 🔸Implement dark/light themes and functionality for the entire web application. 🔸Integrate various Shopify plugins, add new products, etc.🔷 𝘛𝘦𝘤𝘩 𝘚𝘵𝘢𝘤𝘬: 🔹Javascript (Vue, React) 🔹jQuery, Axios 🔹HTML5/CSS with Tailwind CSS

Cluj-Napoca, Cluj, Romania

𝐁𝐥𝐨𝐜𝐤 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 & 𝐑𝐓𝐌 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 𝐒𝐮𝐢𝐭𝐞 𝐟𝐨𝐫 𝐇𝐑 𝐏𝐥𝐚𝐧𝐧𝐢𝐧𝐠 🔶 𝘊𝘰𝘳𝘦 𝘙𝘦𝘴𝘱𝘰𝘯𝘴𝘪𝘣𝘪𝘭𝘪𝘵𝘪𝘦𝘴 🔸Led full-stack development, including database architecture, backend RESTful APIs, and frontend development, notably in service payment card processing flow. 🔸Selected and implemented a developer-friendly frontend stack for a new web application. 🔸Engineered reusable UI components, optimizing user experience and application scalability. 🔸Developed backend services for automated tasks using CRON jobs and background-hosted services. 🔸Enhanced performance through caching patterns and performance analysis of features and queries. 🔸Integrated JavaScript libraries for data chart generation, supporting statistical analysis and reporting. 🔸Executed SQL database migrations and data analysis using Entity Framework.◆ 𝘈𝘥𝘥𝘪𝘵𝘪𝘰𝘯𝘢𝘭 𝘙𝘦𝘴𝘱𝘰𝘯𝘴𝘪𝘣𝘪𝘭𝘪𝘵𝘪𝘦𝘴 ♦ Conducted code analysis, refining and integrating design patterns. ♦ Managed cloud-based operations in Microsoft Azure Portal. ♦ Participated in UX improvement brainstorming, improving client engagement and usability. ♦ Mentored interns and junior team members, providing code reviews and fostering skill development. ♦ Authored documentation for the application suite, aiding user comprehension and future development.🔷 𝘛𝘦𝘤𝘩 𝘚𝘵𝘢𝘤𝘬 🔹C# (.NET Core, LINQ, AutoMapper, Entity Framework, Mediator pattern) 🔹SQL & NoSQL(SSMS, Cosmos DB, Blob Storage) 🔹TypeScript & JavaScript (Aurelia, Svelte) 🔹HTML & CSS (Bootstrap/Tailwind)