Nilo Siqueira Full-Stack Web3 Developer

Full-Stack Engineer

ManyPixels

Jan 2025 - Feb 2025 (2 months)

• Migrated Prisma v1 to recent version and migrated MySQL database to PostgreSQL.
• Switched code-first approach from SDL-first approach with Pothos graphql schema builder.
• Implemented Relay graphql and removed apollo graphql client.

Full-Stack Developer

HexaIT Service Solutions

Jan 2024 - Aug 2024 (8 months)

• Developed a web app for user data management with full CRUD functionality using the MERN stack.
• Reduced SMS notification system speed from 3 minutes to few seconds by updating legacy code to allow Elixir multithreaded processing and database connection pooling.
• Implemented MongoDB for efficient data storage, and Express/Node.js for robust backend API management.
• Implemented a multilingual routing solution that made the platform SEO-friendly.
• Designed a responsive React UI, ensuring smooth interactions across devices.
• Enabled real-time data updates and deletions with instant visual feedback, ensuring secure communication and error handling.

E

Full-Stack Web3 Developer

Ebk Tech

Feb 2022 - Dec 2023 (1 year 11 months)

• Designed and implemented robust database models to optimize data flow and storage, enhancing system efficiency and scalability.
• Developed and maintained GraphQL APIs to facilitate seamless communication between frontend and backend systems, improving data retrieval speed and flexibility.
• Conducted code reviews and implemented best practices for backend development, contributing to a 15% reduction in system errors.

E

Web Developer

Easy Communication & Technology

Sep 2020 - Jan 2022 (1 year 5 months)

• Migrated RoR project to Phoenix.
• Designed a tool to automate the developer to start working on the platform, cloning the repository, creating the database, importing a staging dump, setting up the developer environment, and checking the platform's status locally.
• Automated testing in Selenium IDE, development of web solutions using the Easy Builder lowcode tool.
• Maintained the testing framework; almost 100 new tests were added, and more than 200 tests were updated.

D

Blockchain Developer

Dexifier

Mar 2020 - Sep 2020 (7 months)

• Built Dexifier widget with Next.js and developed frontend application with Next.js, Graphql and Redux.
• Rebuilt the indexer for handling cross chain data with Golang’s channel for better performance, instead of using Node.js.
• Implemented swap process with Rango-SDK.
• Built robust API to provide supported chains, tokens, bridges and etc.
• Integrated multiple wallet connection feature of various kinds of wallets such as MetaMask, Phantom, XDefi and Keplr.

Erlang/Elixir Developer

Chip Tecnologia

Jul 2017 - Aug 2018 (1 year 2 months)

• Provided extra development support to existing teams to help meet deadlines under pressure. Involved ramping up quickly and being productive without draining the current team and preventing them from missing key business or regulatory deadlines.
• Maintained and upgraded projects to keep them secure and performant after their initial development
• Increased performance by analyzing database operations and refactoring to remove bottlenecks, and add aggregates resulting in a ten times performance gain for a large data warehouse.

IT Support Technician

Chip Tecnologia

Apr 2017 - Jun 2017 (3 months)

• Provide remote and in-person technical support to users, solving problems related to hardware, software, networks and peripherals.
• Perform the installation, configuration and maintenance of operating systems and applications.
• Diagnose and resolve network connectivity failures, printer configurations and other devices.
• Document and monitor open calls, ensuring resolution within the established deadline.
• Offer guidance and support regarding the use of corporate tools and internal systems.
• Manage the inventory of IT equipment and assist in the configuration of new devices.
• Ensure the proper functioning and security of IT resources, monitoring and applying security updates and patches.

Nilo Siqueira

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