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About

Mateus Malaquias

Senior Software Engineer · São Paulo, Brazil

I'm a software engineer with over a decade of experience, specializing in designing and developing scalable systems for fintech, video-streaming and accommodations.

I am deeply committed to delivering robust backend solutions that drive efficiency and innovation — systems that stay correct under load, are a pleasure to operate, and outlive the trends that shaped them.

Outside of shipping software, I write about technology, comic-books, and whatever I'm reading. You'll find my notes on dev.to.

Experience

  1. Lead Software Engineer · PBSF

    Jun 2025 – Present

    São Paulo, Brazil

    Medical technology company focused on real-time neonatal monitoring and multimodal data analysis to protect brain health.

    • Led a team of 10 engineers designing and scaling a distributed edge-to-cloud architecture on Azure — Kubernetes, Java (Quarkus), MySQL, Event Hubs, Redis, InfluxDB, Blob Storage and DuckDB for high-throughput medical data ingestion via Parquet pipelines.
    • Architected edge components for reliable offline buffering and real-time sync with Azure clusters, ensuring sub-second telemetry streaming from neonatal ICUs.
    • Defined CI/CD pipelines and observability standards (Prometheus, centralized logging), improving incident response time by over 60%.
    • Mentored developers through code reviews, design sessions and career planning.

  2. Lead Software Engineer · StudentRoomStay (SRS)

    Jun 2024 – Jun 2025

    San Luis Obispo, California

    International student accommodation that has placed tens of thousands of students across the US, Australia and New Zealand.

    • Architected and led migration of core booking and matching services from AWS Lambda + DynamoDB to a Kubernetes-based microservices architecture with PostgreSQL — eliminating 90% of data-mismatch incidents and adding full ACID support.
    • Designed normalized relational schemas focused on reducing complex join latencies and enabling advanced reporting.
    • Built high-availability REST APIs guided by DDD, using Materialized View caching and the Async Request–Reply pattern.
    • Monitored production health with CloudWatch dashboards and led on-call incidents.

  3. Senior Software Engineer · Greenlight

    May 2022 – May 2024

    Atlanta, Georgia

    Debit card and money app for families, empowering parents to raise financially-smart kids.

    • Led end-to-end development of core products — P2P transfers, Savings Goals and Chore Management — serving 1.5M+ active users.
    • Architected and executed migration of the Chores module from monolith to Kubernetes-based microservices using TypeScript and Java.
    • Optimized data performance with relational (MySQL) and NoSQL (DynamoDB, Redis) stores, reducing average query latency by 50%.
    • Monitored production health with Datadog dashboards and led on-call incidents.

  4. Senior Software Engineer · Itaú Unibanco

    Sep 2021 – May 2022

    São Paulo, Brazil

    The largest bank in Latin America, present in 18 countries, serving 55M+ customers daily.

    • Designed and implemented migration of multiple BFF services from on-premise servers to AWS EKS.
    • Built high-availability REST APIs in Java/Spring Boot with SQL Server and Redis, handling peak loads with sub-500ms response times.
    • Established end-to-end monitoring and alerting with Grafana and AppDynamics, reducing mean time to resolution.
    • Guided and reviewed backend trainees, standardizing code quality checks and AWS best practices.

  5. Lead Software Engineer · Claro Brasil

    Jun 2018 – Sep 2021

    São Paulo, Brazil

    Telecom leader in Latin America, present in 4,200+ Brazilian cities, reaching 96% of the population.

    • Led 3 teams across Brazil, Argentina and Mexico to build a high-throughput video-streaming platform — scaling to 50K req/s at peak and 1M+ concurrent users.
    • Spearheaded a serverless push-notification platform on AWS — delivering 600M+ notifications in year one across 18M device endpoints at 60% lower cost than the legacy system.
    • Defined cloud architecture standards and CI/CD pipelines.
    • Owned hiring, onboarding, reviews and career coaching for engineers.

Skills

Languages

  • Java
  • TypeScript
  • JavaScript
  • Go
  • Kotlin
  • Python
  • SQL

Frameworks & Runtimes

  • Spring Boot
  • Quarkus
  • Node.js
  • Gin
  • Serverless
  • Flask

APIs & Integration

  • REST
  • GraphQL
  • gRPC
  • Webhooks

Databases & Caching

  • PostgreSQL
  • MySQL
  • DynamoDB
  • MongoDB
  • Redis
  • InfluxDB

Messaging & Streaming

  • SQS
  • SNS
  • Kinesis
  • EventBridge
  • Step Functions
  • Event Hubs

Cloud & Infrastructure

  • AWS
  • Azure
  • Docker
  • Kubernetes
  • Terraform

Architecture

  • Microservices
  • DDD
  • SOLID
  • Hexagonal
  • BFF
  • Saga
  • CQRS

Testing & QA

  • JUnit
  • Mockito
  • Jest
  • Cypress
  • Playwright

CI/CD & Observability

  • Git
  • GitHub Actions
  • Prometheus
  • Datadog
  • Grafana

Community

  1. Member, Java Community & SouJava · JCP

    Jun 2018 – Present
    • Elected Java Community Process (JCP) member — review and vote on JSRs and engage with Expert Groups to shape platform evolution.
    • Co-lead the SouJava user group, planning quarterly meetups, hackathons and signature events.
    • Speaker at flagship conferences like Oracle Code One (formerly JavaOne).

  2. Community Manager · Training Center

    Jul 2018 – Dec 2020
    • Produced 30+ talks on systems architecture, Agile and programming fundamentals; authored technical blog posts and mentored learners one-on-one.

  3. Organizer · NoSQLBahia & JavaBahia

    2016 – 2018
    • Ran Brazil's largest NoSQL meetup at UFBA (500+ attendees) and co-organized biannual JavaBahia meetups in Salvador.

Education & Certificates

Degree in Analysis and Development of Systems · Unijorge · 2016

Elsewhere

LinkedIn in/malaquiasdev Email mateusmalaquiasdev@outlook.com Twitter @malaquiasdev Dev.to dev.to/malaquiasdev