Mathews Lima

Senior Software Engineer · Backend & Full Stack

About

Senior software engineer with 7+ years building B2B SaaS, currently in fintech. I'm backend-focused, but I work across the full stack. My strongest work is on data-heavy systems. I restructured a 20M+ row PostgreSQL table without taking it offline, migrated around 2B records from a third-party API, and brought queries that ran for over an hour down to milliseconds.

I work in Node.js and TypeScript today, on microservices running on AWS and Kubernetes, after years of PHP and Laravel. I take what I build all the way to production, from the Terraform it runs on to the observability around it. On the front end I mostly work with Vue, and I've also shipped with React, Livewire and Inertia, so I can take a feature from the database to the UI.

Most of my career has been remote with US teams. I'm based in Brazil (UTC-3), which lines up well with US working hours. Outside of work I'm exploring functional programming with Elixir.

Experience

  1. Verified Inc.

    Dec 2025 - Present

    Software Engineer · via InSquad

    11 mos · Remote, United States

    • Restructured the 20M+ row PostgreSQL events table that powers billing and usage analytics online, with no downtime or data loss, and automated its partition maintenance so it keeps performing as it grows.
    • On top of it, rebuilt the usage-based billing pipeline so customers are invoiced on accurate event counts, and took the queries behind usage charts and growth-over-time views from over an hour down to milliseconds.
    • Reworked secrets management across 10+ microservices so credentials can be rotated without downtime.
    • Made the developer docs AI-friendly, with llms.txt and Markdown versions of every page.
    • Node.js
    • TypeScript
    • PostgreSQL
    • AWS
    • Kubernetes
    • Terraform
    • AWS SSM
    • External Secrets
    • New Relic

  2. DevSquad

    Apr 2021 - Dec 2025

    Senior Full Stack Developer · returned to the company

    4 yrs 9 mos · Remote, Utah, United States

    • Delivered 10+ B2B SaaS products for US clients across very different domains, leading development on most of them.
    • Migrated around 2B records from a third-party API into an ad analytics platform, with an import that picked up where it left off after any failure.
    • Built a self-service reporting engine that let customers combine data from multiple ad platforms into their own dashboards.
    • Cut response times on slow endpoints by up to 90%.
    • Integrated payment, video and ad platforms, including Stripe, Vimeo, StackAdapt and Viant.
    • PHP
    • Laravel
    • Horizon
    • Redis
    • MySQL
    • Vue
    • React
    • Livewire

  3. A2TEK

    Nov 2019 - Apr 2021

    Full Stack Developer

    1 yr 6 mos · Brasília, Brazil

    • Migrated core applications from CakePHP 2.x and 3.x to Laravel following PSR standards, modernizing their architecture and making them faster and cheaper to maintain.
    • Added unit and feature tests, turning risky releases into predictable ones.
    • Helped build new SaaS products in Laravel on a testable architecture.
    • Set up and maintained production servers on DigitalOcean for several applications.
    • PHP
    • CakePHP
    • Laravel
    • MySQL
    • DigitalOcean

  4. DevSquad

    Apr 2018 - Dec 2018

    Full Stack Developer

    9 mos · Remote, Utah, United States

    • Built features for client B2B SaaS products in Laravel and Vue.js.
    • Sped up slow queries and made background jobs more reliable.
    • PHP
    • Laravel
    • Vue.js
    • MySQL

Education

  • Faculdade Projeção

    2016 - 2020

    Systems Analysis and Development, Information Technology

    Brasília, Brazil

Skills

Languages
TypeScript, PHP, SQL
Backend
Node.js, Laravel, FeathersJS, Knex, Horizon, CakePHP, REST APIs
Databases
PostgreSQL, MySQL, Redis, MongoDB
Infrastructure
AWS, Kubernetes, Helm, Terraform, Argo Rollouts, Docker, GitOps, New Relic
Architecture
Microservices, DDD, Hexagonal Architecture, Clean Architecture
Frontend
Vue.js, Nuxt, React, Livewire, Inertia, Alpine.js, Tailwind CSS
Exploring
Elixir