Sebastian Donastor Hernandez

LinkedIn +1-809-***-**** ad3n5x@r.postjobfree.com GitHub

Skills

• C# .NET JavaScript TypeScript CosmosDB MSSQL PostgreSQL Node Express Ngrx Angular Tailwind NoSQL Git

• Azure Cloud Computing Serverless Redis ETL Jest Clean Architecture Unit Testing GraphQL OOP SOLID HTML CSS

• Microservices Distributed Systems Signal R Frontend Backend Full-Stack Spanish, English – All professional proficiency or above Experience

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Senior Software Engineer - Remote X-TEAM Sydney, Australia 06/2022 - 01/2024

• Significantly enhanced system performance for a key IOT provider, by expertly refactoring and upgrading all related functions. Achieved a drastic reduction in data latency using the latest technologies of Azure, C#, .NET, Cosmos DB, Azure Functions, Key Vault, and Redis.

• Dramatically optimized Signal R latency from over 10 minutes to just 5 seconds. Achieved this by identifying and eliminating redundant Redis calls causing an N+1 issue and consolidating them into a single, efficient call, significantly enhancing system responsiveness.

• Implemented a strategic data management initiative, leading to over $100,000 in storage cost savings by purging redundant data over 2 years old, aligning with best practices in data storage and financial efficiency using Azure Cosmos DB TTL.

• Enriched system metrics by integrating the platforms with telemetry; facilitated in-depth Azure Monitor Logs.

• Continuous Integration/Deployment Pipeline Integration, pull requests, code reviews, unit/integration/e2e testing. Mid Software Engineer - Hybrid Neural Technology Solutions Atlanta, USA 02/2020 - 05/2022

• Implemented a comprehensive tool integration strategy using Azure Data Factory, significantly enhancing data integration processes across various environments, including UAT and testing.

• Optimized the web app by virtualizing its most frequently by using pre-filtered components in Angular, significantly enhancing the performance.

• Steered the development of the Forecast Process, meticulously analyzing and segmenting complex challenges into smaller, manageable Tasks using C#, .NET Core, GraphQl and Sync Fusion.

• Optimized application performance through Angular lazy loading modules, reducing initial load time and enhancing user experience by dynamically loading necessary modules on-demand.

Software Engineer - Hybrid Motor Credito Dominican Republic 02/2019 - 02/2020

• Designed and implemented enterprise fintech application driving monthly revenue of $2 millions using C# .NET, Angular Js, SQL, node, NGRX, and jQuery.

• Engineered and delivered multiple CRUD operations for key entities, including cities, countries, and vehicles, streamlining data management and accessibility using C#, Angular and Ngrx..

• Pioneered the development of a core data entry screen for credit officers, enabling seamless data input and empowering request state Transitions using Angular and Ngrx.

• Installed and configured validation services, significantly enhancing backend validation processes, ensuring data integrity, and maintaining a seamless user experience using C# and FluentValidation. Software Engineer, Intern / Freelancer -

On Site

Procompetencia Dominican Republic 01/2018 - 12/2018

• Client Tracker: real-time monitoring of client movements in facilities. It features real-time entry and exit logging with client signature verification (Node JS/React/Socket)

Education Bachelor of Software Engineer APEC University Dominican Republic 02/2019 - 12/2022

• Major in Software Engineer

Software Technologist ITLA Dominican Republic 08/2016 - 12/2018 Others

• Azure Certified: Microsoft Certified: Azure Fundamentals (11/2023)

• Scrum Certified: Certiprof International (09/2019)