Hallen Tech is a technology consultancy specializing in custom software development and enterprise communications engineering. We build the systems and solutions that off-the-shelf products can't — from internal business platforms to mission-critical voice and collaboration infrastructure.

Our work sits at an unusual intersection: deep expertise in carrier-grade communications and network architecture, combined with modern full-stack software engineering. This lets us serve clients who need both — companies modernizing legacy communications stacks while simultaneously building the software that runs around them.

Service areas:
- Custom software development — business platforms, internal tools, portals, dashboards, and integration layers built on a modern stack (NestJS, React, TypeScript, PostgreSQL), with the engineering discipline carried over from mission-critical systems.
- Enterprise communications consulting — architecture, deployment, migration, and modernization of voice, contact center, and unified communications platforms (Cisco BroadWorks, Webex, CUCM, HCS), including IMS/VoLTE integration for service providers.
- Cloud, infrastructure, and platform engineering — Kubernetes, on-prem and hybrid deployments, automation, observability, and DevOps practices for teams that need real control over their stack.
- Technical advisory — architecture reviews, technology selection, and senior-level guidance for engineering leaders.

We work directly with technical and business leaders across Brazil, the Americas, and Europe, in Portuguese, English, and Spanish. Engagements range from focused short-term consulting to long-term embedded delivery.

Hallen Tech

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Hallen Tech

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