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Patrick – AWS, React, Python, experts in Lemon.io

Patrick

From Brazil (UTC-3)flag

Full-stack Web Developer|Senior

Patrick – AWS, React, Python

Patrick is a Senior Full-stack Engineer with over 20 years of experience, combining technical depth with a strong product and startup mindset. Known for extreme ownership, transparent communication, and the ability to work directly with founders and stakeholders without a PM layer, he thrives in fast-moving, product-focused environments. He has also built agentic coding pipelines with automated PR generation and is available immediately for full-time engagement.

21 years of commercial experience in
E-commerce
Fintech
B2C
Embedded software
SaaS
Digital asset management
Low-level integration
Main technologies
AWS
10 years
React
11 years
Python
6 years
Typescript
6 years
Additional skills
Ruby
Ruby on Rails
RAG
Redis
ElasticSearch
GraphQL
Docker
Amazon ECS
Amazon SNS
Next.js
Amazon S3
Node.js
CI/CD
React Native
Angular.js
iOS
Redux
Django
Ionic
AI agent development
Direct hire
Possible
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Experience Highlights

Senior Software Engineer
Sep 2024 - Ongoing1 year 7 months
Project Overview

A custom port of an open-source advanced driver-assistance system to a 2024 crossover-coupé model, enabling features such as lane-keeping and automated assistance on hardware that is not officially supported. He focuses on reverse engineering, low-level vehicle integration, and safety‑oriented control tuning to achieve reliable automated driving behavior.

Responsibilities:
  • Reverse-engineered the vehicle’s CAN bus communication.
  • Integrated steering and other control signals with the open-source driving agent to enable stable lane-keeping and assisted driving.
  • Adapted vehicle interfaces to match Openpilot’s expectations.
  • Tuned control parameters for safe and smooth driving behavior.
Project Tech stack:
C++
Machine learning
Senior Software Engineer
Dec 2024 - Nov 20261 year 10 months
Project Overview

A technology-driven wealth management platform that empowers financial advisors with tools to manage client relationships, investments, and financial planning.

Responsibilities:
  • Built agentic workflows using Agno and leveraged Generative AI to accelerate development through human-in-the-loop systems while optimizing token usage and efficiency.
  • Collaborated with cross-functional teams to improve advisor experience by deprecating Salesforce dependencies and integrating direct Google Calendar data flows.
  • Participated in on-call rotations, diagnosing and resolving advisor-facing issues to ensure high platform reliability and user satisfaction.
  • Served as an active PR reviewer, maintaining high code quality standards and mentoring peers through thoughtful feedback.
Project Tech stack:
Ruby on Rails
React
RAG
Senior Software Engineer
Apr 2022 - Oct 20253 years 6 months
Project Overview

A security and compliance automation platform that helps organizations achieve and maintain certifications such as SOC 2, ISO 27001, HIPAA, PCI DSS, and GDPR through continuous monitoring and automated evidence collection.

Responsibilities:
  • Collaborated with product, design, and other engineering teams to deliver high-quality, user-centric functionality in a fast-paced, iterative environment.
  • Designed and implemented full-stack product features that automate compliance workflows, including evidence collection, control monitoring, and policy management.
  • Led end-to-end development and deployment of custom integrations for Angellist and HR platforms like Gusto and Rippling, preventing manual data overwrites and contributing to contract renewal.
  • Reduced annual Elasticsearch infrastructure costs by $24K through research, optimization, and implementation of a streamlined installation process.
  • Served as the Elasticsearch expert and provided guidance and support to team members.
Project Tech stack:
Ruby on Rails
React
GraphQL
Apollo GraphQL
ElasticSearch
Docker
PostgreSQL
Redis
Typescript
Founder and Senior Software Engineer
Oct 2018 - Feb 20223 years 4 months
Project Overview

An online grocery delivery startup providing a fully digital supermarket experience with its own inventory and logistics.

Responsibilities:
  • Led the full software development lifecycle for web and mobile applications, backend systems, and DevOps infrastructure.
  • Increased order fulfillment efficiency by 50% by designing and implementing a digital warehouse mapping system.
  • Developed a personalized product recommendation engine using AWS Personalize and Elasticsearch.
  • Headed the development of a mobile app using React Native for iOS and Android platforms and integrated it with backend services through GraphQL APIs.
  • Implemented a CI/CD pipeline with GitHub Actions and Docker to automate feature testing and deployment.
Project Tech stack:
React
React Native
Node.js
GraphQL
AWS
ElasticSearch
CI
CD
Docker
Typescript
Next.js
Amazon ECS
Amazon S3
Amazon SNS
Amazon EC2
Amazon Route 53
AWS Lambda
Amazon RDS
MySQL
Senior Software Engineer
Apr 2016 - Feb 201710 months
Project Overview

An equity management platform that automates the import, processing, and management of capitalization table data to streamline client onboarding and portfolio tracking. 

Responsibilities:
  • Developed and refined tools that automated the import and processing of complex capitalization table data.
  • Enhanced data processing accuracy by developing Python scripts for parsing and importing large-scale Excel cap tables.
  • Collaborated with cross-functional teams to design and implement new features using React and Redux.
  • Troubleshot and resolved critical production issues in real time using Django, Celery, Redis, and Postgres.
  • Led technical discussions and knowledge-sharing sessions on API design and architecture.
Project Tech stack:
Python
Django
React
Redux
PostgreSQL
Redis
Celery

Education

2016
Computer Science
Bachelor's degree

Languages

Portuguese
Advanced
English
Advanced

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