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Luis Antonio Vieira Junior

Luis Antonio Vieira Junior

Software Engineer

Mountain View, California, US
+1 (650) 885 1710
Portuguese, English, Spanish

Background


About

About

I am a versatile software engineer, specializing in backend development while also having some frontend experience with React. I am particularly adept at identifying and resolving complex technical challenges. My robust technical leadership is demonstrated through a track record of strategic problem-solving and fostering collaborative team environments. I hold both Brazilian and Portuguese citizenships along with a US Green Card.

Work Experience

Work Experience

  • Senior Software Engineer II - Platform Optimization, Carta

    Jul, 2023 - Nov, 20234 months

    I spearheaded the platform optimization team as its most senior engineer. My role was instrumental in defining key issues for optimization, conceptualizing strategies, and drafting detailed technical specifications to resolve these challenges.

    • Facilitated extensive inter-team collaboration, ensuring alignment of goals and strategies for optimizations across various codebases.

    • Mentored team members, accelerating their proficiency with our monolithic architecture.

    • Developed specialized tooling for performance monitoring and debugging, empowering engineers to identify and address performance issues more effectively.

    • Significantly improved application latency through strategic data fetching and display optimizations.

    • Designed and implemented Circuit Breaker mechanisms, bolstering the platform's resilience in scenarios of downstream service degradation.

  • Senior Software Engineer II - Documents, Carta

    Jul, 2023 - Jan, 20212 years 6 months

    In my role on the Documents team I led the technical development of Carta's Document Management System (CDS), a foundational service that powers all document workflows on the platform. My leadership in this project was pivotal in transforming the way Carta handles document management, significantly enhancing efficiency and user experience.

    • Spearheaded the integration of external services such as Textract and GPT-4 into CDS, providing the ability to extract structured data from documents swiftly.

    • Initiated and guided Carta's prompt engineering efforts, authoring prompts for critical documents like 'Articles of Incorporation' and 'Stock Purchase Agreements'.

    • Committed to high standards of performance and reliability, I ensured that all p99 latency metrics remained below 100ms, while maintaining an impressive uptime of 99.99%.

    • Beyond technical contributions, I played a crucial role in building and mentoring the team, and I stepped into management and product management roles during periods without a direct manager or PM.

  • Senior Software Engineer I - IAM, Carta

    Jan, 2019 - Jan, 20212 years

    During my tenure with the IAM team at Carta, I played a key role in developing and strengthening the company's identity and access management infrastructure. My work was instrumental in enhancing security, user management, and the overall scalability of Carta's services.

    • Was the solo engineer responsible for the the design and implementation of Carta's Authentication System.

    • Led the implementation of Carta's Identity Service, a central repository for all user data, a pivotal component in transitioning Carta away from a monolithic architecture.

    • Actively participated in the design and development of Carta's Authorization System (AuthZ), drawing inspiration from Google's Zanzibar paper.

  • Engineering Manager - Corporations, Carta

    Jun, 2017 - Dec, 20181 year 7 months

    In my role as an Engineering Manager for the Corporations team at Carta, I led multiple strategic initiatives and managed several dynamic teams, contributing significantly to the company's technological advancement and people development.

    • Managed the development of Carta's first service outside the monolith, the Board service.

    • Led Carta's initiative to transition into Docker.

    • Actively mentored engineers, focusing on their career development and goal attainment.

    • Managed multiple teams comprising over 10 engineers, overseeing the majority of the core cap table platform at Carta.

    • Provided technical leadership in React, disseminating my previously acquired expertise to enhance the team's proficiency.

  • Senior Software Engineer - Valuations, Carta

    Jul, 2016 - May, 201711 months

    As a Senior Software Engineer in Carta's Valuations team, I focused on enhancing the efficiency and effectiveness of our valuation services through strategic software development.

    • Developed and implemented a range of tools and features tailored to streamline the workflow of valuation analysts.

    • Actively participated in the migration of our tech stack from KnockoutJS to React.

  • Senior Software Engineer, WPensar - GridClass

    Mar, 2015 - Jun, 20161 year 4 months

    At GridClass, I played a pivotal role in starting and creating the company, an incubated startup within WPensar focused on optimizing school timetables. My efforts were central to transforming a complex logistical challenge into an innovative software solution.

    • Spearheaded the engineering efforts of GridClass, translating the startup's vision into a tangible and effective software product.

    • Collaborated closely with one of our founders to devise a robust mathematical model tailored to the school timetabling problem.

    • Developed the core mathematical model into code utilizing Mixed Integer Linear Programming (MILP) to run on our CPLEX solver.

    • Mentored and led a team of two engineers.

  • Software Engineer, LiveCapital

    Aug, 2013 - Feb, 20151 year 7 months

    At LiveCapital, I played a key role in our team of just 5 engineers, developing features that significantly enhanced user experience and functionality.

    • Implemented key features enabling customers to effectively track and analyze their investments, such as graphs and reports.

    • Built an innovative parser to process brokerage statements in PDF format. This tool automatically extracted transaction data from statements from any of the Brazilian brokerages.

    • Engineered an ELT pipeline to gather financial and stock market data.

Skills

Skills

  • Proficient

    LLMs / Prompt Engineering

    Python

    Django

    Celery

    Postgres

    Redis

    Docker / Compose

  • Advanced

    Javascript / Typescript

    React

    GRPC / Protobuf

    Kubernetes

    MongoDB

  • Intermediate

    Flask

    DevOps

    AWS

    Kafka

Education

Education

  • Computer Science, BS, Universidade Federal Fluminense

    Dec, 2012 - Jun, 2014

  • Computer Science, Foreign Exchange, Colorado School of Mines

    Jan, 2012 - Dec, 2012

  • Computer Science, BS, Universidade Federal Fluminense

    Mar, 2010 - Dec, 2011