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Alef R. — Mid-level Full Stack Developer from Brazil

Alef R.

Mid-level Full Stack Developer

Brazil 2-3 years
Open to offersNew to Platform
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About

Alef R. is a seasoned Full Stack Developer based in Campo Grande, Brazil, bringing extensive expertise to logistics and risk management systems. Skilled in React, TypeScript, NestJS, and MongoDB, he has crafted complex solutions like real-time fleet management systems and nonconformities modules. His tenure at Upper GR underscores his capacity for developing sophisticated apps using technologies such as Flutter, Azure, Leaflet, and Google Cloud. Previously, Alef dedicated 14 years as Co-Founder and CTO of Akinetworks, where he drove critical technical and business advancements, including the design of wireless and GPON infrastructure and the implementation of an Internet Exchange Point in Campo Grande. His leadership extended to operational and financial management, steering the company towards a successful sale in 2024. Alef's technical repertoire spans both frontend and backend ecosystems, cloud services, and advanced networking protocols.

Experience

  • Full Stack Developer (PJ)

    Upper GR · 2025 — Present
    Created a real-time fleet management system named Control Tower, featuring interactive maps (Leaflet) and GPS tracking. Developed an auditing system to ensure traceability using Mongoose and AsyncLocalStorage. Engineered the Yard Management module for processing GPS positions in real time. Established a Nonconformities module with a rich text editor (TipTap) and implemented file uploads via Google Cloud Storage. Built the MUV app (Flutter) for drivers, including GPS operation and document OCR through Azure Document Intelligence. Oversaw the implementation of a permissions system and optimized screen performance by migrating tables to PrimeReact DataTable and establishing report exports in PDF/Excel.

  • Junior Developer

    Group Six · 2025 — 2025
    Configured servers using aaPanel with domain setup, SSL/TLS certificates, and Cloudflare integration. Developed custom scripts for video player enhancements (Vturb), ensuring features like autoplay and pixel tracking functions. Focused on web page development and optimization for performance, utilizing tools like PageSpeed and Lighthouse, while conducting A/B testing for layouts and calls to action.

  • Co-Founder & CTO

    Akinetworks · 2010 — 2024
    Designed and managed Wireless and GPON (FTTH/FTTB) infrastructure using FiberHome and Nokia OLTs to serve a large customer base. Implemented wireless backhaul networks across 12 locations over a span of 845 km along the BR-163 highway for CCR MSVia. Coordinated the establishment of the first IX.CG (Internet Exchange Point) in Campo Grande -MS, minimizing latency and IP transit costs for regional providers. Managed traffic routing using BGP and OSPF protocols, along with datacenter infrastructure monitoring (Zabbix, Grafana, SmokePing), resulting in reduced mean time to repair (MTTR). Directed support teams across multiple levels and was accountable for the company's operational, commercial, and financial management leading up to the sale.

Skills & Expertise

Full Stack DeveloperCSS ExpertSpanish Language ExpertBackend DeveloperComputer Vision EngineerCMSMotion Graphics Designer

Education

  • Systems Analysis and Development
    Estácio · — — 2024

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