Roberto is available for hire

Roberto Salim

Verified Expert in Engineering

Software Developer

Location

Medan Kota, Medan City, North Sumatra, Indonesia

Toptal Member Since

August 5, 2022

Roberto is an ambitious, full-stack software engineer known for his strong back-end skills. He has worked with corporations and startups, developed R&D projects to optimize productivity, designed technology solutions for new products, and created a technical solution for complex business puzzles using a proprietary in-house language called Quill. Roberto enjoys creating new features, automating tedious processes, and delivering solutions that have good UI.

Software Development Back-end Windows Git API Development Node.js Postman MongoDB JavaScript TypeScript Jest Slack MacOS PostgreSQL Serverless Quill

Portfolio

90 Seconds

JavaScript, Node.js, NestJS, GraphQL, PostgreSQL, TypeORM, REST APIs

Friz

JavaScript, TypeScript, Node.js, Amazon Web Services (AWS), Amazon DynamoDB...

Xendit

JavaScript, TypeScript, Node.js, React, MongoDB, PostgreSQL, Postman, Jest...

Experience

Object-oriented Programming (OOP) - 6 years Postman - 4 years Jest - 4 years MongoDB - 4 years TypeScript - 4 years Node.js - 4 years PostgreSQL - 2 years Amazon Web Services (AWS) - 2 years

Availability

Full-time

Preferred Environment

Slack, Windows, MacOS, Visual Studio Code (VS Code), Node.js, Postman, MongoDB, PostgreSQL, PHP 7, Amazon Web Services (AWS)

The most amazing...

...R&D products I've developed were for a fintech startup in Indonesia.

Work Experience

Intermediate Back-end Developer

2022 - PRESENT

90 Seconds

Built a revamped back-end version of a legacy ordering system using Nest.js, GraphQL, and RestAPI by adding enhancements that helped customer ordering more smoothly.
Helped improve minor parts and fix bugs in the UI using React.
Improved and fixed bugs in an existing back-end system using Node.js and GraphQL.

Technologies: JavaScript, Node.js, NestJS, GraphQL, PostgreSQL, TypeORM, REST APIs

Software Engineer

2022 - 2022

Friz

Implemented new features and fixed bugs for the front end.
Built a new back-end service for Friz's new product.
Revamped a service from Serverless to Serverless Stack (SST).

Technologies: JavaScript, TypeScript, Node.js, Amazon Web Services (AWS), Amazon DynamoDB, Amazon S3 (AWS S3), Amazon Cognito, Serverless, Vue, API Development, APIs, Cloud Services, REST APIs

Experiment (R&D) Software Engineer

2020 - 2022

Xendit

Built technology solutions for Xendit experiments (potential new products).
Assisted in creating business requirements with technical feasibility and constraints.
Helped the hiring team in expanding the experiments (R&D) team.
Supported potential merchants and customers and communicated with them for testing purposes.

Technologies: JavaScript, TypeScript, Node.js, React, MongoDB, PostgreSQL, Postman, Jest, RabbitMQ, GitHub, Puppeteer, API Development, APIs, Cloud Services, TypeORM, Data Scraping, REST APIs

Full-stack Developer (PHP)

2019 - 2020

Quintiq

Developed and maintained internal project-collaboration tools for the marketing team, e.g., similar to Trello, dynamic web forms to generate web pages based on a template.
Generated script using Python to automate the tedious process of web scraping.
Maintained the Quintiq website by fixing bugs and adding new features.

Technologies: PHP, MariaDB, HTML, CSS, JavaScript, Git, API Development, APIs

Software Consultant

2016 - 2019

Quintiq

Designed a technical solution for complex business puzzles using a proprietary in-house language called Quill.
Designed UIs that are user-friendly and easy to use with the functional team.
Collaborated with the functional team to ensure smooth delivery of the software solution.

Technologies: Quill, Git, SourceTree, Object-oriented Programming (OOP), API Development, APIs

Experience

Dubai Airport Planning Software

This is a project that I built with a team during my time in Quintiq. It is a planning and optimization software for Dubai Airport. This planning covers baggage belt, check-in counter, service counter, and stands planning.

Education

2014 - 2016

Master's Degree in IT Management

Asia Pacific University - Kuala Lumpur, Malaysia

2011 - 2013

Bachelor's Degree in Information Technology

James Cook University - Singapore, Singapore

Skills

Languages

JavaScript, TypeScript, PHP, HTML, PHP 7, CSS, HTML5, SQL, GraphQL

Frameworks

Jest, NestJS

Libraries/APIs

Node.js, API Development, Puppeteer, Vue, React, REST APIs

Tools

Slack, Postman, GitHub, Git, Quill, SourceTree, Amazon Cognito, RabbitMQ

Paradigms

Object-oriented Programming (OOP), Microservices

Platforms

Windows, MacOS, Visual Studio Code (VS Code), Amazon Web Services (AWS)

Storage

MongoDB, PostgreSQL, Amazon DynamoDB, Amazon S3 (AWS S3), MariaDB, JSON

Other

Software Development, Back-end, APIs, Serverless, CSV, IT Project Management, Cloud Services, TypeORM, Data Scraping

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