Learning Dollars is a network of rockstar engineers ready to join your team.

Hi! I am Lilia and I am a Learning Dollars software engineer. I specialize in Python and JavaScript development. And, I have done projects in various fields like a teacher student marketplace, AWS infrastructure management, a javascript AST code parser in a continuous integration system, and visual novels.

My first demo is Strumclub, a website that connects music teachers with students.

For Strumclub development I used a React frontend with a Django REST Framework backend. The two are connected by API calls using fetch in the frontend. I created the following features:

• a user authentication system that includes signup, login, and reset password pages
• a “teachers sorting” system according to the type of instrument. You can choose an instrument on the start page or on the ‘Teachers’ page
• if you click the ‘See profile’ button you’ll see profile of a particular teacher
• each teacher has the ability to сhange his/her personal data such as name, photo, instrument, availability, etc.

My second demo is a visual novel “The gift of Cthulhu”.

For creating this game I used the Ren’py engine that was written in Python. First I created and customized the graphical user interface. The main interactive elements used in the game are choice buttons and dialogues. There are several main storylines in the game and more than one ending. At the same time, the logic of the game is quite simple, the development of the plot depends only on the choice of the player which is made by clicking on one of the buttons in the displayed menu. The player can also save and load the game and change the options such as the speed with which text appears, sound volume and other parameters.

Thank you for watching my demos and I look forward to working with you!

Hi! I am Lauro and I am a Learning Dollars software engineer. I specialize in Server and Mobile App Development with Python, ReactJS, and React Native. I have done projects in mobile app development and back-end RESTful server development. I’m deeply interested in meditation, exercising and reading, and these three activities are a consistent part of my daily routine.

My first demo is the mobile app SangeetaSudha, focused on presenting server data to the final user. The stages involved in the development of the app were:

1. design of a new backend server with RESTful API based on Django REST framework to store and display the website information. It has different filter functionalities based on query parameters and screen names, all received from the mobile app.
2. development of a web crawler to download the information from http://www.sangeetasudha.org and save it in the new development server. The crawler logs the information on the terminal to keep the user informed of the progress of the crawling. In addition to that, it logs all errors and warnings on a different file following a standardized, which facilitates the later treatment of the errors and warnings.
3. development of the mobile app to fetch information from the new server and display it to the user in different screens.

My second demo is my personal website, lauromuller.co, developed based on WordPress and customized with HTML, CSS, and Javascript. The website is hosted in AWS, giving it flexibility and scalability for future improvements. This is a simple project form the programming perspective, but it strongly highlights my approach towards design and UX. The main characteristics of the project are:

1. Design customization, using both HTML and CSS, to make the website look cleaner and more attractive.
2. Design and create the content for the project management and business plan courses (still ongoing), and implement navigation menus to make website interaction easier.

Thank you for watching my demos and I look forward to working with you!

Hi! I am Pavel and I am a Learning Dollars software engineer. I specialize in developing applications for mobile and web platforms. I have done projects in e-commerce, CRM, and automation.

My first demo is CRM.

This is a deeply customized version of an open source application called SugarCRM. It was used by a company with 15 operators calling potential customers and returning clients. After several years of work, the size of the database increased to hundreds of thousands of records and searching became too slow. More than 30 seconds was required to search in a worst case.

The application’s database was implemented in MySQL using about a hundred tables with many relations and indexes. It had PHP backend and HTML frontend. I worked on the server backend. I implemented caching of a sophisticated data model in a plain key-value database that allowed to reduce the search time to 2 seconds. I used Mongo database. Thereafter, the search time did not increase even when the database became 5 times bigger. The client was fully satisfied.

Let’s check another demo.

It is an application for iOS and Android allowing users to sell or buy various services.

I used the React Native framework for a mobile client. Also, I used the Django framework for the backend. The application uses external login via Facebook, the device’s camera for taking selfies, and Amazon storage for uploading photos.

I will never stop wondering how well put together these frameworks are! They allowed me to quickly and reliably create native-looking mobile applications for both platforms using the same code base. I really like it.

Hi! My name is Zain and I am an Android/.NET developer with more than 7 years of experience in industry. I am specialized in Mobile, Web and Desktop Development using Android, Java, C# and ASP.NET. I have also done test automation projects using Selenium webdriver for browser automation, MSTest and TestComplete as test runner.

My first demo is a media editor application in Android that allows a user to edit video and images. This app allows the user to apply different filters including trim a specific part of the video, crop to specific aspect ratio, resize, blur, apply speed, add music or text and other options. Users can also share videos on different social media platforms like instagram, facebook, whatsapp. I used the ffmpeg library for all media processing and CMake to compile this for Android.

The main challenges involved in creation of this app were researching a lot about different video editing terms like encoders, frame rate, bitrate and then using different fallbacks to create a working version of video. This app has more than 50 thousands downloads on playstore with a 4.4 average rating.

My second demo is an Android-based POS register with special utilities and enhancements for the food service, baking, and restaurant industries. This app is connected to a website using php web-service that allows users to place order, add items, change price etc., or generate different reports from online transaction data. Users can process transactions via cash, credit card, gift card, or for any wholesale customer using an account (so that they can be billed at a later date). This app uses PAX and Auth.NET as credit card processors and allows users to link different hardware to this app (Zebra,StarIO printers, Unimag CC reader, Cash drawers, Digital scales).

My third demo is an affiliate marketing website that allows users to keep track of his affiliate sales and commission.

It was created in the ASP.NET MVC3 framework along with HTML5, css3, telerik, KENDIO UI components, and the WCF.NET RESTFUL web service. My responsibilities were to use html designs from the other team to convert them to views along with writing all data models I also implemented controller logic to create and optimise the sql stored procedures and functions in the backend which were then used in web service methods. Finally I created automated tests using selenium webdriver.

Thank you for watching my demos and I look forward to working with you!

Hi! I am Srinivas, a Java engineer who specializes in J2EE, Web Services, Spring, Hibernate, Progress BPM, Reporting tools like ESpreadsheet, BirtViewer and UI frameworks like Jquery, JSF, and bootstrap. I have recently started working on projects using python, nodeJS and React JS. I have done projects in the domains of healthcare, finance, and utilities. Outside work, I’m deeply interested in reading fiction novels, watching movies and short films, and knowing about various mythological facts.

My first demo is an Airline E-Ticketing System. This system is being used for booking domestic flights within Nepal for Dev Travel and Tours Pvt Ltd. Stated below are few features of the system that i will be covering as part of the demo.

1. Flight Search Page where in a user can select Fly From and Fly To airport points within nepal by selecting trip type as One Way / Round Trip and other respective parameters. On click of the submit button all the input parameters are being sent as part of a SOAP call against a remote server which returns the response containing the flight search results.
2. Flight Search Results page where in a user can check the respective flights based on Price Range and/or Refundable/Non-Refundable parameters before booking the respective flight. On click of the submit button all the selected parameters are being sent as part of a SOAP call against a remote server which returns the response pertaining to Flight Booking.
3. Flight Booking page where in a user can provide all the details pertaining to passengers who are travelling along with contact details like email address and phone number to which PNR details can be sent from the system after the payment has been done. On click of the submit button all the input parameters are being sent as part of a SOAP call against the remote server which returns the response pertaining to Payment.
4. Payment Page where in a user can pay the Fare price through Net Banking / Credit /Debit Card whichever is applicable. Once the payment has been completed successfully, flight itinerary is generated with all the details.

My second demo is regarding a JSX parser I worked on. This parser is used to validate wiki rules pertaining to JSX elements (HTML DOM elements) that were defined for a webapp boilerplate system. Notice how when I run the parser in terminal it breaks down the target file into its AST tree, and then it recursively walks through the tree checking that style rules are being followed or not. Stated below are high level steps as part of the parser.

1. Get the Abstract Syntax Tree (AST) from each of the input file (for example : index.js files from boilerplate system webapp components). To perform this operation I use the flow-parser nodejs module.
2. Iterate through all the JSX elements and validate them against predefined wiki rules. To perform this operation I am using astq nodejs module as it allows to use XPATH API on the AST tree.
3. To validate Parent-child JSX elements I am looping through the AST tree dynamically and recursively applying step2 for all the children associated with a parent using the javascript map interface. For this functionality I created a POC (proof of concept) which illustrates the behaviour and has been integrated into the main parser.

Thank you for watching my demo and I look forward to working with you!

Hi! I am Pavel and I am a Learning Dollars software engineer. I specialize in Web Development. I have done projects in web application development in ReactJS, and I have written scripts for browser automation work in Python/Selenium. I also have worked with content management systems like Wordpress/Joomla/Opencart in the field of e-commerce. In my free time I’m fond of Social Media Marketing, creation of visual content, and video production.

My first demo is a web Todo list application.

Now we see the Todo list application, this is the frontend and this is the backend model. We can create multiple list items. Write the name and click add and again and one more. Now we can change one of the list items or delete it. Also there is a function to select all the elements of the list. In the yellow panel, we can see how many items remain to be done.At the bottom there are buttons with filters. Also we can clear the list of the items that are already marked as done.

My second demo is a script that does browser automation work.

The script scrapes brightcrowd.com in order to collect user information. The script opens up the site, where we have been logged in already manually. The script selects the type of post and collects users into a text file. Another script I built scrapes cofounderslab.com. It can search for user information based on specified parameters. For example, we need founders in the USA. The script finds these users and writes their data (email/facebook/linkedin/twitter) to a csv file. Here are the text files of data collected [show the text files of data].

Thank you for watching my demos and I look forward to working with you!