João Melo with 8 years of experience combines expertise in data structures and algorithms with a passion for creating scalable, user-oriented solutions. Notably an active contributor to open-source initiatives, João fosters innovation through shared technology growth. His technical robustness and collaborative spirit make him a strong asset to any development team.

Portfolio at jopcmelo.dev

Experience

SENIOR SOFTWARE ENGINEER

BooksOpen | Nov 2023 – present

Transitioned from contractor to full-time employee after demonstrating significant value within a few months
Led a major platform refactoring due to a company pivot, architecting and building main services from scratch to align with new requirements
Optimized APIs and databases for scalability and reliability, implementing an event-based messaging architecture using Redis and Postgres
Acted as a technical advisor to the board of directors, contributing to business decisions with technical insights
Managed and architected comprehensive cloud infrastructure for diverse services, including front-end, back-end, and databases on AWS
Developed advanced front-end components using TailwindCSS, shadcn/ui, Zustand, and Context API, incorporating complex animations with Framer Motion
Enhanced system resilience with observability and monitoring tools such as Sentry, New Relic, and Axiom to identify and resolve bottlenecks

SENIOR SOFTWARE ENGINEER Islands | Nov 2023 – Jan 2024

Spearheaded back-end development, database management, and infrastructure
Led a dynamic team, ensuring alignment and collaboration across all development phases
Engineered solutions and architected features, handling release cycles efficiently
Responsible for defining and structuring CI/CD processes for multiple projects in multiple clients of different sizes
Orchestrated sprint planning and execution, fostering agile practices within the team to maintain project momentum and facilitate transparent communication
Development and maintenance of streaming video, audio and text-based features based on SRT and WebRTC real-time CDNs
Using artificial intelligence for real-time voice recognition to generate transcripts
Maintained Node.js bridges between JavaScript and native C++ code to manage hardware

SENIOR SOFTWARE ENGINEER Productbot AI | Mar 2023 – Dec 2023

Key contributor in developing an AI-driven platform empowering product managers, bringing the full platform into operational use within 6 months
Implemented complex AI chains and intelligent agents using LangChain, contributing significantly to its open-source community
Worked with custom and self-hosted LLMs to build advanced AI chain configurations
Leveraged RAG and embeddings workloads for complex AI usage to push the company's capabilities further
Implemented a new algorithm called Dynamic Top K in the open source LangChain project, used by thousands of developers, focused on keeping token usage optimized during RAG stages

SENIOR SOFTWARE ENGINEER X-Team | May 2021 – Feb 2023

Led the maintenance of back-end services for mobile applications and administrative platforms
Planned and designed a new service from ideation to implementation
Implemented efficient CI/CD pipelines that boosted the building, testing, and deployments of new code
Reduced technical debt in multiple systems, substantially lowering system maintenance and improving performance
Worked with the mobile engineering team to integrate services and resolve any issues

SENIOR SOFTWARE ENGINEER Coinbase | Jun 2021 – Jul 2022

Effectively worked on two front-end teams and delivered several high-impact tasks that increased the computational efficiency of complex operations
Optimized Coinbase’s homepage by completely refactoring existing code and integrating a Content Management System (CMS) to improve the User Experience of over 98,000,000 users
Contributed to a company initiative that reached over 300,000 new customers through Coinbase's Super Bowl partnership
Migrated static pages to dynamic layouts through a CMS-based architecture which significantly simplified maintenance activities and reduced development costs
Worked with the mobile engineering team to integrate services and resolve any issues
Enhanced the web ranking of products by implementing SEO techniques, leading to increased web traffic and brand awareness
Documented new components utilizing Cosmos, Storybook, and React-Docz to enhance future development workflows

SENIOR SOFTWARE ENGINEER Provi | Dec 2019 – May 2021

Mentored several developers within the technical team to ensure consistent and high programming quality
Built and maintained micro-services focused on educational financing to improve the lives of lower-income people. It raised $55 Million USD
Established standards for workflows and testing within company projects
Created a tool to facilitate digital contract creation and signing of documents for Brazil's Central Bank
Built and maintained a system to improve credit granting decisions based on customers' payment history and debt
Automated a facial recognition and document validation tool using advanced AI techniques
Advised the company on all decisions regarding database management
Responsible for the supervision and maintenance of 5 of the company's micro-services
Collaborated in migrating from a monolithic architecture to over 25 individual micro-services

SENIOR SOFTWARE ENGINEER Corinthians | May 2017 – Dec 2019

Designed and developed high concurrency, low latency services for finance and sports management applications
Created and deployed a digital currency to facilitate payment for the sports club's members and associates
Maintained the company's main website, enabling it to handle over 100,000 monthly users
Built and maintained services that supported crucial in-house processes

Projects

Vain is a platform that aims to simplify access and use of aesthetic services in Brazil, adding features such as online scheduling, advanced reports for service providers, franchise control, evaluation and search ranking based on types of services and advanced filters
Snipshare is an all-in-one tool for coding, note-taking, code execution and sharing
Portfolio is my personal website where I publish numerous articles, share knowledge, and also showcase some state-of-the-art components
Data Structures & Algorithms series is a series of articles that I write addressing topics such as algorithms and data structures

Achievements

Migrated a monolithic application to an architecture of more than 25 micro-services
Developed systems that resulted in more than 55 million dollars applied directly to the education of people
Brought more than 300,000 new customers through a project in partnership with the Super Bowl event
Eliminate the need for engineering teams' efforts through a project integrated with a CMS that was able to control not only the content of an entire website, but also the complete layout
Created the Dynamic Top K algorithm in one of the most famous open source projects in the AI world, LangChain
Various open-source contributions

References available upon request.

Contact

+55 11 96300-5537 [email protected]

GitHub

Twitter

Education

FIAP Associate Degree in Systems Analysis and Development 2021 – 2022

ROCKETSEAT Software Development Bootcamp 2019 – 2020

Skills

TypeScript
Node.js
React.js
Next.js
NestJS
Python
Golang
PostgreSQL
MongoDB
Redis
AWS
Docker
Continuous Integration & Continuous Delivery
Tests

Languages

• Portuguese - Native • English - Full professional proficiency

I hereby give consent for my personal data included in my application to be processed for the purposes of the recruitment process.