Tweak single MongoDB query so aggregate > lookup doesn't return all fields in lookup collection

Hello, I would like to take this assignment. I am having 14 years of experience on web development, deployment and project management. Below are my core technical skills •ASP.Net /HTML/CSS/JavaScript/JQuery •C# and VB.Net SOLID Design Principles •MS SQL, AZURE SQL, MySql and non-relational databases like Azure Table storage, Azure DocumentDb and MongoDb •Entity Framework (Database first, Code first and OData) •Azure Service Bus, N Service Bus and Azure Service Fabric •AWS: EC2/S3/Elastic Beanstalk/RDS/LightSail •Restful API Development (using C#) and deployment on cloud •Team City and Octopus Server for Continuous Integration and deployment •VSS/TFS/GitHub/SVN/Bitbucket/VSO •Agile/Scrum/Kanban/Zendesk •JIRA/Confluence •Unit tests using nUnit and xUnit framework •Integration testing •Acceptance/ Behavioral testing using SpecFlow •API Authentication using JSON web token •JSON format for information exchange •Domain Driven Design (DDD) •Command Query Responsibility Segregation (CQRS) •Owin Web hosting •QuartzNet for Cron job •SSRS and Crystal Reports •Integration and implementation of Carrier(DHL, UPS, FedEx,TNT) APIs in the ASP.Net application •Integration and implementation of payment gateway(PayPal, PayUMoney) APIs in the ASP.Net application Working on tools like: Zendesk, Autofac, AutoMapper, SeriLog, Elastic-Search, Kibana, RoboMongo, RabbitMQ, TopShelf Looking forward for further discussion and to start. Best Regards