Antonio is available for hire
Hire AntonioAntonio Guilherme Ferreira Viggiano
Verified Expert in Engineering
Serverless Developer
São Paulo - State of São Paulo, Brazil
Toptal member since March 27, 2018
Bio
Antonio has been working as a developer and technology leader for the past ten years in multiple roles, from senior software engineer to tech lead to CTO. His primary skills are React/Node.js, TypeScript, AWS, and Blockchain (Solidity, Hardhat, Foundry). He is currently a co-founder and CTO at Falco, a web3 gaming publisher. He developed the first versions of the company's ERC20/ERC721, whitelisted sale, and marketplace smart contracts.
Portfolio
Falco
Blockchain, Solidity, Solana, Ethereum, Smart Contracts, Node.js, JavaScript...
R2U Augmented Reality & CGI
Amazon Web Services (AWS), Google Cloud Platform (GCP), Microservices...
Civic.com
Node.js, Amazon API Gateway, AWS Lambda, JavaScript, Serverless Architecture...
Experience
Availability
Part-time
Preferred Environment
TypeScript, Amazon Web Services (AWS), Solidity, Blockchain
The most amazing...
...project I've worked on was a fungible and non-fungible token marketplace in Solidity that served 100k web3 gamers.
Work Experience
Co-founder | CTO
2021 - PRESENT
Falco
- Developed Solidity contracts for ERC-721 NFTs, ERC-20 tokens, safelisted sales, and ERC-20/ERC-721 marketplace.
- Hired and managed a team of four blockchain developers in the release of the SDK v2, a more complex and optimized version of the first iteration I had created.
- Oversaw the game launch process of our games, resulting in over 10,000 web3 players.
Technologies: Blockchain, Solidity, Solana, Ethereum, Smart Contracts, Node.js, JavaScript, AWS Lambda, Amazon API Gateway, Git, Bash, Linux, Agile, React, Docker, Amazon Athena, Cryptocurrency, Serverless Framework, Serverless Architecture, Terraform, Microservices, Amazon Web Services (AWS), TypeScript, Scrum, PostgreSQL, Non-fungible Tokens (NFT), Web3.js, Ethers.js, Ethereum Smart Contracts
Co-founder | CTO
2018 - 2022
R2U Augmented Reality & CGI
- Oversaw the deliverables for 10+ software developers, designers, and 3D artists with varying degrees of seniority.
- Scaled the company from 3 to 20+ employees and $0 to thousands in monthly recurring revenue, having launched different successful products.
- Spearheaded the development of R2U Integration SDK, a JavaScript SDK that allows AR experiences (on mobile) and 3D model visualization (on desktop) directly through the browser.
- Managed the creation of Not Render Farm, a distributed render infrastructure deployed as an SOA on AWS capable of handling hundreds of thousands of frames in parallel.
- Used Terraform to allow quick set up of new environments, decoupling of microservices, and great scalability of Docker images to process render jobs.
Technologies: Amazon Web Services (AWS), Google Cloud Platform (GCP), Microservices, Serverless, Node.js, JavaScript, AWS Lambda, Amazon API Gateway, Git, Bash, Linux, Agile, SQL, React, Docker, PostgreSQL, Amazon Athena, Serverless Framework, Serverless Architecture, Terraform, TypeScript, Scrum
Senior Javascript Back-end Developer
2018 - 2018
Civic.com
- Developed the ID Verification platform in React and web3.js.
- Implemented security processes and automation tools such as Snyk.
- Oversaw the launch process of the ID Verification platform and provided production support and assistance.
Technologies: Node.js, Amazon API Gateway, AWS Lambda, JavaScript, Serverless Architecture, Serverless Framework, Scrum, Git, Docker, React, Bash, Linux, Agile, Amazon Web Services (AWS)
Co-founder | Tech Lead
2014 - 2017
BelugaDB
- Created a high-performance, column-oriented, distributed data store using C/C++ capable of processing terabytes of data in milliseconds.
- Led a group of four senior software developers and mentored them technically and in career development.
- Participated in the development of an interactive dashboard using React and Node.js.
- Contributed to integrating many different data sources and extracting terabytes of data from traditional data stores to our proprietary database using Node.js on AWS Lambda.
- Automated cluster management (creation, deletion, resharding, and more) tasks using Terraform, Docker, and Jenkins.
- Integrated system management tools to monitor the database system's latency, CPU, memory, and other indicators.
- Set up an Elasticsearch, Logstash, and Kibana (ELK) stack to analyze database performance indicators.
Technologies: C, AWS Lambda, Serverless, Node.js, JavaScript, Big Data, Amazon API Gateway, Git, Bash, Linux, Agile, React, Docker, Amazon Athena, Serverless Framework, Serverless Architecture, Amazon Web Services (AWS), Scrum
Software Engineer Intern
2014 - 2014
Revmob Mobile Ad Network
- Led a task force that reduced web fraud by 80% by analyzing suspicious traffic from different data sources and request patterns.
- Led the integration team, which increased the eCPM of publishers by 15% by partnering with demand-side platforms (using Node.js) and adapting the network's software development kit to comply with new industry standards.
- Helped design and led the onboarding process for the company by structuring programming crash courses (Bash, Node.js), culture meetings, and other activities with new hires.
- Aided in restructuring the company's security policies by adopting AWS security guidelines (IAM, S3, KMS, and more).
- Managed a large Redis cluster and identified key bottlenecks, optimizing the platform's source code to reduce latency.
Technologies: Bash, Redis, MongoDB, Node.js, JavaScript, Git, Linux, Agile, Amazon Web Services (AWS), Scrum
Experience
Fluffy Waddle
https://github.com/aviggiano/fluffy-waddleFluffy Waddle is an automated smart contract threat detection system.
It crawls Etherscan and other blockchain explorers and uses open-source and custom tools to find potential vulnerabilities. Then, it sends a private message to project owners and notifies them of these issues.
It crawls Etherscan and other blockchain explorers and uses open-source and custom tools to find potential vulnerabilities. Then, it sends a private message to project owners and notifies them of these issues.
Redis-roaring
https://github.com/aviggiano/redis-roaringRedis-roaring is an open source Redis module that uses the CRoaring library to implement roaring bitmap commands for Redis.
These commands can have the same performance as Redis' native bitmaps for O(1) operations and be up to 8x faster for O(N) calls, according to microbenchmarks.
The project is one of the world's top ten most-starred Redis libraries.
These commands can have the same performance as Redis' native bitmaps for O(1) operations and be up to 8x faster for O(N) calls, according to microbenchmarks.
The project is one of the world's top ten most-starred Redis libraries.
Terraform AWS Elastisearch Cloudwatch Logs
https://github.com/notrenderfarm/terraform-aws-elasticsearch-cloudwatch-logsTerraform module to provision an AWS Elasticsearch service with an automatic subscription to CloudWatch logs. As the company's CTO, I was responsible for the development architecture and publishing of this library, which was forked and reused multiple times by other teams.
Education
2009 - 2014
Bachelor's Degree in Mechatronics Engineering
Universidade de Sao Paulo - São Paulo, Brazil
2011 - 2013
Master's Degree in General Engineering
École Centrale de Marseille - Marseille, France
Skills
Libraries/APIs
React, Node.js, Web3.js
Tools
Terraform, Git, Amazon Athena
Languages
Bash, C, JavaScript, TypeScript, Solidity, SQL
Frameworks
Serverless Framework, Express.js
Paradigms
Serverless Architecture, Agile, Scrum, Microservices
Platforms
Amazon Web Services (AWS), AWS Lambda, Docker, Linux, Blockchain, Ethereum, Google Cloud Platform (GCP)
Storage
Redis, MongoDB, PostgreSQL, Elasticsearch
Other
Serverless, Amazon API Gateway, Cryptocurrency, Data Structures, Smart Contracts, Ethers.js, Ethereum Smart Contracts, Big Data, Algorithms, Non-fungible Tokens (NFT), Bitcoin, Lean Project Management, Data Mining, Solana
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