Samuel Mello, Developer in Curitiba - State of Paraná, Brazil
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Samuel Mello

Verified Expert  in Engineering

Back-end Developer

Curitiba - State of Paraná, Brazil
Toptal Member Since
December 29, 2021

Samuel is an experienced software developer who has worked in the telecommunications industry for almost 15 years. He has proven expertise working with multiple environments, including embedded devices, real-time and high-available back-end platforms, and the cloud. Samuel is keen on the entire software development process and related steps, including requirements specification, coding, test automation, validation, CI/CD, troubleshooting, and monitoring.



Preferred Environment

Windows, Linux

The most amazing...

...project I've worked on is an embedded software for the IPTV set-top box, including the UI, hardware management, video playback, and platform interaction.

Work Experience

Software Expert

2014 - PRESENT
  • Customized embedded software for a DTH PVR set-top box, including adding middleware modules in C++ and implementing a new UI in SVG/JavaScript.
  • Developed middleware for a new generation of IPTV set-top boxes. Defined the middleware architecture, and implemented modules in C++ and the UI in Qt and QML. Integrated with vendors' SDKs for hardware management and network functionality.
  • Migrated the set-top box UI from Qt and QML to HTML and JavaScript. It included defining the test automation strategy relying on Jest and Puppeteer.
  • Refactored back-end platform modules for user management in the video platform. Migrated from a monolithic system to a microservices domain and the database from Microsoft SQL to Couchbase. Specified REST interfaces and domain events with Apache Kafka.
Technologies: C++, JavaScript, Node.js, TypeScript

Software Analist

2008 - 2014
  • Developed new features in embedded software for network switches and routers, focused on the multicast stack, including IGMP, MLD, and PIM.
  • Automated the build system of embedded software for network switches and routers.
  • Advanced features to introduce the IPv6 protocol stack in embedded software for network switches and routers using different protocols such as OSPFv6 and BGPv6.
Technologies: C++, C

User Management Microservices for Video Platform

The technical evolution of a global video platform's user management features, migrating to a microservices domain. These modules manage user information used by OSS/BSS systems, other platform components, and end user-facing front ends with millions of concurrent devices in Latin America.

My contributions involved migrating from a monolithic service back end with a C# and SQL Server relational database to a set of microservices running on a NoSQL database and using Node.js, Couchbase, Apache Kafka, Kubernetes, and Istio. Deployed a synchronization mechanism using Kafka Connect to allow gradual services migration.

Embedded Software for IPTV Set-top Box

Technically led the development of the set-top box middleware. It included the REST and Multicast back-end platforms integration; Qt and QML user interface; video playback protocols, such as RTP, Smooth Streaming, PIFF/H.264, and AAC; encryption and CA/DRM with PlayReady, and Nagra; hardware and chipset integration for Linux, Broadcom Nexus, RCU, WiFi, and HomePNA; third-party components and applications, such as Frog by WyPlay, and Netflix; and monitoring and throubleshooting tools.

The project required a strong interaction with the network and platform engineering teams to define service specification details and troubleshoot issues. It also involved frequent collaboration with the product teams to understand requirements and plan its implementation.
2012 - 2013

Master's Degree in Business Administration (MBA)

Unisinos - Porto Alegre, Brazil

2005 - 2007

Master's Degree in Computer Networking

Federal University of Paraná - Curitiba, Brazil

2001 - 2004

Bachelor's Degree in Computer Science

Federal University of Paraná - Curitiba, Brazil

AUGUST 2021 - AUGUST 2023

Microsoft Azure Solutions Architect Expert





C++, C, JavaScript, TypeScript, Embedded C++




Linux, Azure


Software Development, HTTP, Distributed Systems, Qt 4, RTP, Multicast, IPTV, Smooth Streaming

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