César Herrera Email & Phone Number

I performed the role as technical lead in a company placed in the rental industry.- I was building a new serverless architecture on AWS. * Main technologies used: NodeJS, Lambda, Apigateway, DynamoDB, Terraform. * Objective: To provide fast and scalable APIs. * Impact: This application improved the user experience having faster and scalable apis, the previous one was slow and crashes frequently.- I participated in the migration of services from on-premise to… Show more I performed the role as technical lead in a company placed in the rental industry.- I was building a new serverless architecture on AWS. * Main technologies used: NodeJS, Lambda, Apigateway, DynamoDB, Terraform. * Objective: To provide fast and scalable APIs. * Impact: This application improved the user experience having faster and scalable apis, the previous one was slow and crashes frequently.- I participated in the migration of services from on-premise to AWS. * Main technologies used: NodeJS Lambda, Step Function, AppFlow, Terraform. * Objective: To connect with SalesForce. * Impact: Costs reduced and better performance. Show less

I was working as a technical lead in an educational company.- I was building and maintaining apis hosted on AWS architecture. * Main technologies used: .NetCore, AWS, Spinnaker, Concourse. * Objective: Develop and maintain apis using .NetCore. * Impact: Different and useful tools were provided to school, accelerating and improving student learning.

As solutions architect:- I participated in the design and architecture evolution of a digital identity application called "soy yo". * Main technologies used: .NetCore, Apigateway, Lambda, EC2, Secrets Manager. * Objective: The three biggest banks in Colombia joined together in order to build an app to capture and centralize all the information of a citizen. * Impact: Any users could manage multiple transactions with other companies through the app and avoid direct… Show more As solutions architect:- I participated in the design and architecture evolution of a digital identity application called "soy yo". * Main technologies used: .NetCore, Apigateway, Lambda, EC2, Secrets Manager. * Objective: The three biggest banks in Colombia joined together in order to build an app to capture and centralize all the information of a citizen. * Impact: Any users could manage multiple transactions with other companies through the app and avoid direct contact with them.- I led and designed the architecture of a middleware that communicates an ecommerce with a mobile app. * Main technologies used: .NetCore, Blob storage, Table storage, Azure functions, RabbitMQ. * Objective: Connect and centralize third-party components in an unique app. * Impact: The most complete ecommerce app in Colombia providing the best product purchasing experience.- I was involved in the development, leadership and design of the cloud architecture for Grupo Éxito’s marketplace. * Main technologies used: .NetCore, Lambda, Apigateway, S3, SNS, SQS, Secrets Manager, CloudFront, Cloudwatch, IAM, ECS, DynamoDB, Elasticsearch (one of the first projects of the company that was developed on AWS, making use of around 20 services). * Objective: Build a new and own marketplace. * Impact: Costs reduced and user experience improved through a new site, facilitating a better management of products. Show less

Colombia

As technical leader and developer participated in the:- Design and development of web microservices for Pequeñín app. * Main technologies used: .Net Framework, IIS. * Objective: Provide a new channel for the users and boost the income of product keys. * Impact: Greater fidelity and income of products increased.- Design and development of web microservices for Genfar app. * Main technologies used: .Net Framework, IIS. * Objective: Build a new app in… Show more As technical leader and developer participated in the:- Design and development of web microservices for Pequeñín app. * Main technologies used: .Net Framework, IIS. * Objective: Provide a new channel for the users and boost the income of product keys. * Impact: Greater fidelity and income of products increased.- Design and development of web microservices for Genfar app. * Main technologies used: .Net Framework, IIS. * Objective: Build a new app in order to train customers. * Impact: Customers were able to make training through the app in a better way without having to go anywhere.- Design and creation of microservices on AWS for the Nequi Panamá campaign. * Main technologies used: .Net Framework, DynamoDB, Lambda.. * Objective: Taking advantage of the world cup, develop a new campaign for Nequi Panamá (Bank). * Impact: Banking transactions increased.- Design and development of campaigns for the Pequeñín website. * Main technologies used: .Net Framework, Oracle, SQLServer, IIS, HTML, CSS, JQuery, Javascript. * Objective: Develop multiple campaigns for positioning brand, loyalty users and capturing new audiences. * Impact: Greater fidelity, new users registered, and increased redemptions.- Design and development of ecommerce for the Pequeñín website. * Main technologies used: .Net Framework, Oracle, SQLServer, IIS, HTML, CSS, JQuery, Javascript. * Objective: Create an ecommerce in order to increase redemptions. * Impact: Users were able to redeem points for products.- Redesign of the Grupo Familia websites . * Main technologies used: .Net Framework, Oracle, SQLServer, IIS, HTML, CSS, JQuery, Javascript. * Objective: Create new web sites with a fresher design. * Impact: Web sites renovated with a new design, improving user experience and providing new content. Show less