André Müller
Software Engineer

Email: muller.a.a@pm.me
GitHub: https://github.com/aamuller
LinkedIn: https://www.linkedin.com/in/aamuller
Location: Earth / Remote
Website: https://aamuller.com

Summary
I'm a software engineer at 800.com, where I work on telecommunications software for voice, SMS, phone numbers, APIs, voice AI agents, and customer-facing web products.

Before that, I worked at A2 Hosting, building software for hosting infrastructure, customer support, billing, and web products. I also co-founded Dayback, where I worked on software for renewable-energy systems.

I started with programming, studied information systems, and later earned a master's degree in mechatronics from IFSC, where my research involved simulation, controls, and software for mechatronic systems.

Focus
- Web and mobile applications with clear product value
- Cloud services that connect products, providers, and operations
- APIs and integrations between complex providers
- Automations that reduce cost, remove manual work, or make teams faster
- Telecom and messaging systems
- Voice AI agents and conversational, AI based workflows
- Embedded and edge software when the problem touches hardware

Work Experience

800.com
Senior Software Engineer
Building and maintaining telecom software across voice, SMS, phone number inventory, XML-based voice APIs, WebRTC, SIP, voice agent workflows, APIs, product features, and customer-facing web applications.
- Created telecom features that let customers use cloud-hosted custom numbers
- Worked with XML-based voice APIs, WebRTC, SIP, and voice agent workflows
- Worked with multiple telecom providers and their APIs
- Built APIs and integrations around telecom capabilities
- Developed marketing web experiences that supported customer growth

A2 Hosting
Senior Software Developer
Worked on hosting infrastructure, billing, customer support tooling, developer environments, and marketing websites.

Dayback
Founder and Technology Director
Led software and product development for renewable-energy products, including photovoltaic forecasting, microgrid systems, industrial hardware, and hybrid wind/solar concepts. Participated in Shark Tank Brazil and helped attract awards, investment, and partnerships.

SENAI Institute of Technology
Automation Specialist
Managed and built R&D projects in automation, industrial systems, energy efficiency, remote labs, SCADA/LabVIEW systems, and applied technology consulting.

Education
- Master's Degree in Mechatronics, IFSC
- Bachelor's Degree in Mechatronic Engineering, IFSC
- Technologist in Industrial Mechatronics, IFSC
- Information Systems Technician, CEFET/SC

Research
Research topics included modeling and co-simulation for mechatronic systems, robot design, controls, servo drives, embedded software, and hardware and software design for data acquisition systems.

Skills / Keywords
javascript, typescript, node.js, react, php, python, web applications, mobile applications, rest apis, graphql, api design, cloud services, aws, docker, linux, git, ci/cd, postgresql, mysql, telecom software, voip, voice ai agents, conversational ai, llm apis, claude api, openai api, prompt engineering, webrtc, sip, sms, xml voice apis, internal tools, platform engineering, test automation, unit testing, integration testing, end-to-end testing, qa engineering, playwright, jest, embedded software, mechatronics, controls, data acquisition systems.