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Mauricio B. C. Vieira

Mauricio B. C. Vieira

Senior Software Engineer

Salvador, Bahia, BR
+55 11 970 125 571
Portuguese, English, Spanish

Background


About

About

Seasoned software engineer with 19+ years across product companies and consulting. Strong in Ruby on Rails, React, Python/Django, Rust, Javascript, APIs, and cloud-native delivery. Recent engineering on the DAWN ISP stack at dawninternet.com (Hydrogen/Oxygen, Storefront GraphQL, CI/CD and Kubernetes), as well as full-stack work on Andrena’s Django/Celery/PostGIS platform at andrena.com.

Work Experience

Work Experience

  • Senior Software EngineerDAWN Internet (DAWN Foundation)

    Jan, 2025 - Present

    Engineering on the decentralized ISP operating stack at DAWN Internet, a spin-off of Andrena. Scope includes customer dashboard, shared UI, Deployer OSS/BSS (Beta), APIs and workers, and headless commerce.

    • Established and evolved CI/CD for multiple repositories as dawninternet.com and related properties moved from Webflow to Kubernetes, replacing static publishing with repeatable build, test, and deploy pipelines.

    • Built the storefront from scratch on Shopify Hydrogen (React), hosted on Oxygen, using Storefront API GraphQL for catalog, cart, and checkout—owning app structure, data fetching, and integration patterns.

    • Delivered coupon, referral, and reward features on the storefront and dashboard.

    • Implemented SendGrid email provider transitions and production support.

    • Shipped features on dashboard.dawninternet.com, shared UI packages, and the Deployer OSS/BSS program (provisioning, email/SendGrid transitions, production support), with Go, Rust, and TypeScript services and React/Vite frontends.

    • Collaborated remotely with distributed engineering teams using Git; supported high-priority production investigations and operational fixes.

  • Staff Software EngineerAndrena

    Jun, 2023 - Present

    Full-stack engineering on Andrena’s Django monolith (Celery, Stripe, PostGIS): customer and building-facing web experiences, admin tooling, and core billing/accounts/service/scheduling domains, in close collaboration with product and operations.

    • Implemented and maintained customer-facing pages, admin dashboards, and property/building flows aligned with product design.

    • Extended billing, accounts, service, and scheduling domains; integrated Stripe and background processing with Celery.

    • Contributed to operational and network-related initiatives (OpenWiFi, Nautobot) where scheduled.

    • Parcel-based front ends, pytest and Playwright, Docker-supported dev workflows; remote delivery with Git-based workflows.

  • Senior Software EngineerGoCo.io

    Mar, 2022 - Jun, 20231 year 3 months

    Full-stack development for an HR, benefits, and payroll platform for SMBs (Ruby on Rails + React).

    • Owned features across Rails and React: Zapier 2.0 triggers, Segment analytics, timeline permissions, notes, and billing-related workflows.

    • Built integrations (e.g. UNUM invoice proration) and improved partner-facing APIs (Cybersource, Zapier).

    • Shipped with strong test coverage, Agile practice, and Heroku-based CI/CD.

  • Senior Fullstack DeveloperRivet.AI

    Mar, 2023 - Apr, 20231 month

    Film production automation product: React/Next, Node/Adonis, Firebase/GCP.

    • Full-stack feature work across frontend and backend with Redux Toolkit, React Query, Jest, Redis, Mailgun, MySQL.

  • Senior Software EngineerBeTerra

    Nov, 2021 - Mar, 20224 months

    Backend and workflow features in TypeScript (Express/NestJS) with multi-tenant medical project flows.

    • ExcelJS-based bulk XLSX processing, PDF generation via Puppeteer, BullMQ/Redis jobs, Jest/Mocha TDD.

    • Deployed with Docker on Google Cloud (Cloud Run, Pub/Sub).

  • Software Engineer, Hodinkee (via Willdom)

    Jan, 2021 - Oct, 20219 months

    Rails + React e-commerce and editorial features for luxury watches retail.

    • Accessibility, push notifications, homepage scheduling, Segment analytics, Shopify integration, insurance documents, CMS evolution.

    • Stack: Rails, Sidekiq, PostgreSQL, Redis, React, Heroku.

  • Software Engineer, LeafLink (via TrueLogic)

    Jul, 2020 - Jan, 20216 months

    Logistics and integrations on a wholesale cannabis marketplace (Django).

    • New models, DRF APIs, vendor integrations (Optimoroute, AppSheet), Docker on AWS (ECS, S3).

  • Software Engineer, MemberHub (via BairesDev)

    Sep, 2019 - Mar, 20206 months

    Rails marketplace and platform features for parent-teacher organizations.

    • Rails, Sidekiq, PostgreSQL, Elastic Beanstalk, Codeship.

  • Software Engineer / Tech Lead, PayCertify

    Apr, 2019 - Sep, 20195 months

    Technical lead for merchant onboarding and VCard payment experiences.

    • Rails, Sidekiq, Ember.js, Node, Docker, Heroku, Jenkins.

  • Software Development Consultant / FounderOmnicode Solutions

    Jan, 2018 - Present

    Consulting: Rails, Django, React, DevOps, and client delivery (JusPredict, BairesDev, PayCertify, ISP dashboard, clinic calendar, and others).

    • Sole proprietor; scoped MVPs, mentored juniors, delivered production systems with Ansible, Docker, Kubernetes, Heroku, and CI/CD.

  • Software Engineer, Smartly.io

    Jan, 2018 - Apr, 20191 year 3 months

    Business Intelligence team: data pipelines, integrations, and customer-facing analytics.

    • ETL from Intercom, NetSuite, Salesforce; Customer Health dashboard with Periscope; Ruby, Python, PHP, JS, Kubernetes, Jenkins.

  • Full Stack EngineerAPInf Oy

    Mar, 2017 - Aug, 20175 months

    API management platform (Meteor, Api Umbrella, MQTT, MongoDB, Docker, Travis, Django, Heroku).

  • Full Stack Engineer, Voxy

    Oct, 2015 - Mar, 20171 year 5 months

    Language-learning platform: full lifecycle from front-end to data pipelines and AWS operations.

    • Django, DRF, Backbone, PostgreSQL, MongoDB, Elasticsearch, Hadoop, Puppet, Ansible, Jenkins, broad AWS usage.

  • Senior Ruby on Rails Developer (Freelance), Clicksign (via Omnicode Solutions)

    Jun, 2015 - Oct, 20154 months

    Public REST API versioning, client SDKs (Ruby, PHP, Java), Formstack/WebMerge document automation.

  • Senior Engineer, Dafiti

    Aug, 2014 - Apr, 20158 months

    Ruby and PHP client solutions, Rails, Laravel, Elasticsearch, Circle CI.

  • Senior Developer, Codeminer42

    May, 2014 - Jul, 20142 months

    Consulting: Rails, PHP Laravel, MongoDB, Redis, Elasticsearch.

  • Senior Consultant Developer, Thoughtworks

    May, 2013 - May, 20141 year

    Agile delivery, Rails, Redis, Elasticsearch, Couchbase, ActiveMQ, mentoring.

Skills

Skills

  • Front end

    React

    Shopify Hydrogen

    Shopify Oxygen

    JavaScript

    TypeScript

    HTML5

    CSS3

    Tailwind CSS

    Bootstrap

    Vue

  • Back end

    Ruby

    Rails

    Python

    Django

    Node.js

    Express

    Go

    Rust

    REST

    GraphQL

    Shopify Storefront API

    Microservices

  • Data & messaging

    PostgreSQL

    PostGIS

    MongoDB

    MySQL

    Redis

    Elasticsearch

    BullMQ

    Sidekiq

    Celery

  • Platforms & delivery

    Docker

    Kubernetes

    Heroku

    AWS

    GCP

    CI/CD

    GitHub Actions

    Webflow to Kubernetes migrations

    Ansible

    Linux

  • Product & collaboration

    Linear

    Git

    Jira

    Agile

    Stripe

    Segment

    Zapier

    Shopify

Education

Education

  • Computer Science, BSc, Universidade Federal da Bahia

    Jan, 1999 - Jan, 2005

    Dissertation: Refactoring para Aspectos de um Framework de Motores de Jogos Orientado a Objetos

Publications

Publications

Interests

Interests

  • Community

    Python User Group of Bahia (organizer 2009–2013)DOJO-Bahia coding dojosRailsGirls Salvador (2013–2019)