Senior .NET Developer, Conversational AI

Mutant

Senior .NET Developer focusing on building conversational bots and integrating generative AI in solutions. Engaging with internal clients and technical teams to enhance user experience.

Posted 4/13/2026full-timeRemote • 🇧🇷 BrazilSeniorWebsite

Tech Stack

Tools & technologies

.NETSOAPVoIP

About the role

Key responsibilities & impact

Work on the development, evolution, and maintenance of conversational text (WhatsApp) and voice (IVR) bots, focusing on generative AI solutions and building intelligent conversational flows using LLMs integrated with messaging platforms and APIs;
Interact directly with internal clients to understand requirements, propose technical solutions, and actively participate in squad refinement activities;
Design conversation flows — text and voice — with a focus on user experience and alignment with business requirements;
Integrate bots with APIs, legacy systems, and messaging platforms;
Use AI tools to accelerate development and improve code quality, actively contributing to an AI adoption culture within the squad;
Write and review automated tests, ensuring the quality and stability of deliveries;
Document technical solutions and developed flows, keeping knowledge accessible to the team;
Identify and propose technical and experience improvements for existing bots;
Collaborate with the QA team during validation and acceptance of deliveries;
Share technical knowledge with the team collaboratively, contributing to the squad's collective growth.

Requirements

What you’ll need

Experience developing conversational solutions or automations integrated with APIs and messaging platforms;
Hands-on experience with projects involving generative AI and LLMs;
Proven experience working in agile squads, with active participation in technical refinement and end-to-end deliveries;
Strong proficiency in C# / .NET;
Integration with REST and SOAP APIs;
WhatsApp Business API;
Git flow and version control;
At least 2 years working on conversational bot development projects (text and/or voice);
Experience with production support and maintenance is a plus;
Conceptual understanding of voice protocols for IVR (VoIP, SIP, VoiceXML) — deeper technical training will be provided on the role;
Preferred: Experience using LLMs in real projects (OpenAI, Claude, Gemini, or similar);
Ability to craft and iterate prompts for different purposes — code generation, conversational responses, and task automation;
Use of AI-assisted coding tools (GitHub Copilot, Cursor, or similar) in day-to-day development;
Ability to critically evaluate AI-generated outputs, identify limitations, and adjust approaches.

Benefits

Comp & perks

Medical and dental coverage;
Life insurance;
Transportation allowance;
Meal and food allowance;
Wellhub (Gympass);
Childcare assistance;
Support for children with disabilities;
Performance-based bonus;
Birthday day off;
Alelo Multi-benefits card;
Allya - partnerships and discounts via the app;
Pet health plan;
Freedom to be who you are. Inclusion is in our DNA. We do not discriminate by gender, race, creed, or color. We are all Mutants!
People and experiences are what drive us. They are our essence and purpose. Actions and programs focused on climate, development, and culture;
Create value for people and businesses. Together, we build digital products that drive business growth;
Join an amazing team that plays together, with a culture of collaboration, innovation, and transformation — and most importantly: that has fun throughout the journey;
Work and exchange knowledge daily. The best minds in the market in a place where they can be themselves: this is how we deliver disruptive solutions;

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Hard Skills & Tools

C#.NETgenerative AILLMsREST APIsSOAP APIsWhatsApp Business APIautomated testingAI-assisted codingvoice protocols

Soft Skills

collaborationcommunicationproblem-solvinguser experience designtechnical documentationcritical evaluationadaptabilityteamworkagile methodologyknowledge sharing