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Focusing
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Focusing
14 followers · 22 following

Achievements

Achievement: Pair ExtraordinaireAchievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

Achievements

Achievement: Pair ExtraordinaireAchievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

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Lucas-Steffen/README.md

Lucas Steffen - Backend Software Engineer

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About me

Backend engineer based in Sinop, MT (Brazil). I build APIs and integrations that stay reliable under load and are easy to operate and extend.

  • Currently at VF PAR, working on backend services for mobility operations and internal systems.
  • Day to day: TypeScript, NestJS, PostgreSQL, Redis/BullMQ, Docker and AWS.
  • Focus: ERP and payment integrations, asynchronous processing, access control and data protection (LGPD).
  • Also write Java, mostly in open-source telematics code.

What I've been working on

  • ERP integration (SAP Business One): end-to-end settlement and posting flow, 1,000+ settlements and 4,000+ postings per day with no manual entry. BullMQ/Redis workers with configurable rate limit and concurrency protect the ERP during peaks.
  • Payments: Pix and installment card charges through Asaas, with idempotent webhooks and append-only records.
  • Data protection: PII encryption with AWS KMS envelope encryption, aligned with LGPD.
  • Open source, Java: contributions to a Traccar fork: a new tracker protocol decoder, PostgreSQL support and multi-tenancy (server · web).

Tech Stack

Languages

Languages

Backend & Data

Backend and data

Infrastructure & Observability

Infrastructure

Testing & Frontend

Testing and frontend

Contact

Want to trade notes on backend architecture? See my portfolio, or reach out on LinkedIn or by email.

Footer

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  1. recreating-pix-logic recreating-pix-logic Public

    TypeScript

  2. VFPAR/traccar-server VFPAR/traccar-server Public

    Forked from traccar/traccar

    Open source GPS tracking platform - self-hosted or managed, 200+ device protocols

    Java

  3. nodejs/nodejs.org nodejs/nodejs.org Public

    The Node.js® Website

    TypeScript 6.9k 6.5k

  4. reactjs/pt-br.react.dev reactjs/pt-br.react.dev Public

    🇧🇷 React documentation website in Portuguese (Brazil)

    JavaScript 540 326