rtscosta

Senior

Experienced Full Stack WEb3 Developer, Product Owner, and Tech Co-founder with a strong background in blockchain, web3, back-end, and strategic product leadership. Proficient in leading development teams, creating innovative solutions, and spearheading complex projects in various domains, including e-commerce, ERP, environmental sustainability, and more.

Skills

Technical Skills: Solidity, Web3, React, Next.js, Node, Nest, GraphQL, Rest API, MongoDB, Postgresql, AWS, Python Flask, DataDog, SendGrid, Twilio, CircleCI, Delphi, Java, C#, MSSQL Server, AngularJS, JDBC, SQLite.

Leadership & Management: Team Building & Management, Agile Methodologies, Project & Product Management, Strategic Partnerships, Infrastructure Handling, Data Visualization, Sales & Marketing Alignment.

DeTask CO. Orlando, FL - Principal Software Engineer 2023-Present

As a software engineer, my primary goal is to deliver with a low cost what customers need to succeed, regardless of the technology or challenge involved. I am here to serve them. In my role at our Orlando office, I not only led a team of 10 engineers but also worked hands-on with coding to enhance our systems, achieving a 50% reduction in downtime and a 30% increase in performance. I played a key role in slashing smart contract costs on the Polygon chain from $5 to $0.02 per contract. My work included developing smart contracts with Solidity, crafting the front end using React and Next.js, and overseeing AWS hosting. I integrated AI using BigQuery and MySQL, maintaining low costs. Beyond my regular duties, I've been proactively learning and implementing a new Machine Learning Model with Python and OpenCV, further contributing to our company's advancement.

Tech Stack: Solidity, React, Next.js, AWS, BigQuery, MySQL, Python, OpenCV, Looker Studio, Google Analytics Firebase

Check out the project demo at: https://dev.validador.detask.io/
Source code available on GitHub: https://github.com/detask/dt_wallet_validator

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Nodis - Software Architect and CTO 2019-2021

As a software engineer, my commitment is to deliver comprehensive solutions that not only meet but exceed business needs and customer expectations. In my role at Nodis, I took the lead in architecting, developing, and managing a system that supported over 250K small stores, collaborating with Stone, a prominent payment company in Brazil. My hands-on approach in designing an AI-powered catalog of 50 million products was pivotal for e-commerce and marketplace efficiency, which significantly increased the user base from 100 to 1,000 small businesses monthly.

Managing 10 microservices with an event-driven architecture for 99% uptime was challenging, but it allowed us to run smoothly at low cost, giving our company a big competitive edge in cost savings.

Tech Stack: MongoDB, Postgresql, AWS, Python Flask, AI, React, NextJS, GraphQL/REST APIs.

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Softvar - Senior Software Architect and CTO 2006-2019

Developing Softvar, an ERP solution to enhance retail efficiency, was a significant challenge. It adeptly processed over 10K daily sales for our biggest customer, managing numerous transactions seamlessly. In my role, I not only architected and developer the backend and frontend but also managed the AWS infrastructure using Delphi 5-7, MSSQL Server, AngularJS, .Net C#, and Rest APIs. As the leader of a 20-engineer team, I implemented performance dashboards and user engagement strategies to promote autonomy. Recognizing the importance of truly understanding customer interactions on a daily basis and the non-stop nature of e-commerce, I created an in-house e-commerce lab. This lab was essential for training my team members, ensuring they comprehended customer needs in a 24/7 operating environment, and enhancing overall customer experience. Additionally, we established partnerships with over 100 companies.

Tech Stack: Delphi 5-7, MSSQL Server, AngularJS, .Net C#, Rest APIs, AWS

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Site Sustentavel Full-stack developer and CTO 2012-2015

Site Sustentável was a startup that neutralized the carbon footprint of websites by planting trees. We planted more than 60k trees in Amazon Forest. Portal using MS SQL Server, C#, AngularJS for tree buying and tracking.

DemoDay: https://vimeo.com/53859136

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Retail System Orlando, FL - Full-stack developer 2000-2006

As a developer specializing in the Pet Industry's Retail System, I was instrumental in developing and maintaining 1.5K point-of-sale systems. These systems, adeptly integrated with handling equipment, credit card machines, microchip readers, and other hardware components, streamlined retail operations. My responsibilities in the 360 Pet System included managing new product development, enhancing customer interaction and experience through data-driven specialized reports, and introducing innovative features like microchip enrollment for pet insurance. I also engineered the Pet Center software, which tracked pet vaccination and disease records, integrating it with an in-house pet category system for efficient product information retrieval. Furthermore, I developed a Java-based Mini ERP System for handheld devices such as Symbol and Zebra printers, encompassing functionalities like pre-sale orders, pre-receiving, purchase, and inventory management.

Tech Stack: Java (for Handheld Mini ERP System), PC Changer, Mercury (Credit Card Hardware and Software Integration), specialized software for microchip enrollment and pet health record management, MSSQL, Delphi 3-7, AWS.

Experience: 3 years

Yearly salary: $100,000

Hourly rate: $75

Nationality: 🇧🇷 Brazil

Residency: 🇺🇸 United States

Experience:

Period	Title	Company
2006 - 2019	Senior Software Architect and CTO	Softvar
2012 - 2015	CTO	Site Sustentavel
2019 - 2021	Software Architect and CTO	Nodis
2001 - 2006	Full Stack Developer	Retail System
2022 -	Web3 Full Stack Developer	DeTask

Skills:

blockchain

blockchain-engineer

react

solidity

web3

english

portuguese

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