Esteban Tobón Serna Email & Phone Number

Colombia

Medellín, Antioquia, Colombia

- Analyze and estimate new requirements during planning and grooming sessions.- Design and Implementation of new REST API’s following Cleaning architecture principles.- Teamwork – pair programming- Build automation tests with CypressTechnological stack: Node JS, Fastify, Prometheus, Grafana, Launch Darkly, Git, React, Jest, CypressI've been working as Fullstack React/Node JS Developer. Here I've been working with SAFe framework, so the requirements were verified during PI and grooming sessions. I'm part of the estimations and development processes. I'm currently working with English speaker client. We had pair-programming sessions to enhance our skills and ways to solve issues.

Medellín, Antioquia, Colombia

- Creation of new components following the development standards and ui/ux designs.- Updating of existing components in order to fix it or add new features.- Updating of existing aws lambdas to include new validations and features.- Implementation of A/B Tests through feature flags and tracks in order to find the best approach for end user.- Analyze, estimate and implement features based on internal needs- Refactor components to allow reusability.Technological stack: React.JS, Node.JS, GraphQL, DynamoDB, AWS, Flagsmith, LogRocket, Zeplin, Amplitude

Medellín, Antioquia, Colombia

- Analyze and estimate new requirements during planning and grooming sessions.- Design and Implementation of new REST API’s following development standards.- Modelling of databases for adding or updating functionalities.- Creation of new components for B2B and B2C apps.- Refactor and fixing of existing components to include new features or bugs fixing.- Teamwork – pair programmingTechnological stack: React hooks, Next JS, React Routing, SQL, ASP Net Core 5, Azure CI/CD, GitI worked as C#/React Fullstack Developer. I worked here using Scrum, so the requirements were verified during Planning and grooming sessions. I was part of the estimations and development. I continued working with English speaker client. We had pair-programming sessions to enhance our skills and ways to solve issues. The Azure pipeline was configured by the development leader therefore we built and released the app changes to all environments.

Medellín, Antioquia, Colombia

- Support for existing application in order to fix bugs or include new features with MVC/Razor/JQuery- Creation and updating of REST Api’s with C#- Migration of existing app in Razor to React JS.- Creation of new components based on Invision designs- Implementation of Jest in order to increase coverage code for Sonar Qube reports- Implementation of Nunit tests- Aggregate pattern with Entity Framework for updating multiple DB tables.- Asynchronous calls with Thunk from frontend app.- Teamwork and pair programming.Technological stack: React, Redux, Sagas, Thunk, Jest, Sonar Qube, Git, Jenkins CI/CD, Entity Framework, C# API's, Nunit, MVC, JQuery, JavascriptI worked as C#/React Fullstack Developer. I worked here using Scrum, so the requirements were verified during Planning and grooming sessions. I was part of the estimations and development. It was my first experience working with English speaker client. We had code reviews to enhance our skills and ways to solve issues. The Jenkins pipeline was configured by the architecture team therefore we build and release the app changes to all environments. I wrote unit tests for backend and frontend and integration tests.

Medellín

Banking system and Bank Loan module for the cooperative sector- Creation and Integration of new API’s to allow interoperability between bank and cooperative sector. This API was in charge of loans between customers and cooperatives.- Refactor in existing API’s to improve performance and high transactions.- Teamwork and pair programming.Technological stack: ASP NET Core 2I had the chance to deepen and do experiments for said company in order to implement new technologies for the current and future projects. I worked with Vue js to build dynamics forms based on a predefined Json Schema. The css was implemented using SASS within the Json Schema. I had the opportunity to build some Rest APIs using Mongo as database for future implementations. Here, it was my first contact with .Net Core.During this time, I moved to the development team and I worked directly in the Loan module. I had to validate the requirements and check the happy / unhappy paths with the architecture team. I promoted the use of Azure DevOps for code management, user stories and requirements.

Medellín

Clinical history of patients, test/exams for evaluation of patients, scheduling of medical appointments.At that time the app was built on Web Forms and .Net Framework 4.7. The system was in charged of register the clinical histories for patients. The client is a Medical center specialized in diseases like Hemophilia, rheumatoid arthritis and multiple sclerosis but they had a module for general medicine. The app asked for different information depending of the disease to threat, like different Clinimetries for rheumatoid arthritis and so on. There was another module for Medication, medical formulas, tests to perform. For medical formulas we had to calculate the dosage because we had drops, injections, pills so depending of the substance the dosage calculation varies. Also in the app we had a security module to give access to the doctors, pharmaceutical chemicals, audit. We had an integration with an external device for enabling the digital signature for Informed consents hence some procedures needed a formal authorization.In terms of interoperability with the health provider, we established the sending of the information using FHIR. Following the FHIR guide for .Net, we created the xml structure for every disease. The xml files were sent via SOAP to the health provider.Once the Website and interoperability reached a good maturity level, the client requested to build a new application for scheduling medical appointments. I worked in the backend side building and deliviering REST API's to be consumed for the front end app.In the backend side, we worked based on Domain Driven Development. The REST API's were built with .Net framework 4.7 and Entity Framework DataBase First with SQL. We had unit tests with Nunit, SonarQube for static code analysis and CI/CD with Azure Devops.Technological stack: API's with C#, Entity framework, SQL, Git, Azure CI/CD, ASP Web Forms, Sonar Qube, Nunit.

Medellín

The project was an ERP Software. I worked in the payroll and billing modules.Technological Stack: ASP Net Web Forms, C#, Javascript, Css, Bootstrap, SQLI worked as a developer, building new features and maintaining a legacy software.I worked in the migration process to new technologies for that time. We implemented Javascript and JQuery to avoid the traditional "Postbacks" in Web forms. Also we used Bootstrap and rebuild the forms in a responsive way, so that improved the user experience. I also gave support to users and gathering of requirements.Here I learned about how to improve the communication skills because I needed to support some client tasks, solve and verify possible issues and give efficiently fast solutions

English Language And Literature, General, B2

Tecnología En Análisis Y Desarrollo De Software, Systems Engineering, 4.5

Tecnología De Sistemas De Información

French Studies, B2