Backend Developer C# – Focus on Generative AI

Intervalor

Backend Developer focused on developing generative AI conversational agents for a leading credit recovery company, combining software engineering fundamentals with AI applications.

Posted 6/30/2026full-timeSão Paulo • 🇧🇷 BrazilMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in backend development with C#/.NET and experience in Generative AI applications for conversational agents. Proficient in API integration, testing, and applying software engineering best practices to deliver maintainable and efficient solutions.

Highest-signal resume keywords

C#/.NET DevelopmentGenerative AI / LLMsAPI Development (REST/SOAP)OOP and SOLID PrinciplesAPI Testing Tools (Postman)

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NETAPI DevelopmentGenerative AILarge Language ModelsOOPSOLID PrinciplesGitAPI TestingDebugging

Tools & Technologies

PostmanBitbucket

Industry Keywords

Conversational AgentsCustomer Service AutomationMVP DevelopmentAgile MethodologiesTechnical Analysis

Tech Stack

Tools & technologies

.NETSOAP

About the role

Key responsibilities & impact

You will be part of a team focused on building next-generation conversational agents, working on real projects using generative AI for customer service, applied to sales, negotiation and automation of customer journeys.
We are looking for professionals who want to grow in this new paradigm, combining solid software engineering fundamentals with practical use of Artificial Intelligence in development.
Development and maintenance of backend solutions in C#/.NET.
Integration with external systems via APIs, Webhooks and services.
Development of Conversational Agents (text and voice).
Participation in prompt engineering and context structuring with team support.
Support in technical analysis of requirements together with business areas.
Participation in testing, validation and continuous improvement of solutions.
Support in building MVPs and conducting AI experiments.
Participation in agile rituals and collaboration with the technical team.
Use of AI tools to increase development productivity.

Requirements

What you’ll need

Experience with Generative AI / LLMs (Large Language Models) applied to conversational solutions (text and voice).
Experience in backend development with C#/.NET and building APIs (REST or SOAP).
Familiarity with API testing tools (Postman or similar).
Ability to test APIs, validate responses and support debugging of integrations.
Knowledge of development best practices (OOP, SOLID).
Understanding of OOP and SOLID principles to write organized, reusable and maintainable code.
Experience with source versioning (Git / Bitbucket): daily usage (commit, branch, merge) and familiarity with pull requests and code review.
Familiarity with API testing tools (Postman or similar).
Knowledge of the fundamental concepts of Generative AI and its mathematical/statistical limitations.

Benefits

Comp & perks

Remote work
Professional development opportunities
Dynamic and challenging environment
Flexibility
Integration into a company that constantly innovates