Software Development Engineer - .Net/C# - Excise Team

About the role

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Software Development Engineer – .NET/C# – Excise Team based in Brazil.

As a Software Development Engineer, you will contribute to the development and evolution of a global tax compliance platform supporting customers across the United States, Canada, and Europe. You will design and deliver scalable, secure backend and frontend solutions, with a particular focus on tax return processing and electronic filing systems. Working within an AI-first engineering environment, you will use artificial intelligence to improve development efficiency, automation, and software quality. You will help expand tax form coverage, strengthen platform reliability, and drive architectural improvements. The role also offers opportunities to influence technical decisions, mentor colleagues, and collaborate with international teams. You will play an important part in shaping engineering standards and delivering impactful technology solutions.

Accountabilities: - Design, develop, and maintain scalable, secure backend and frontend systems supporting a global tax compliance platform.

- Build and enhance ASP.NET Core applications and backend services, particularly tax return processing and eFile engines.

- Maintain existing excise tax returns and develop new tax forms covering jurisdictions across the United States, Canada, and Europe.

- Integrate AI-assisted coding, testing, documentation, and architectural exploration into everyday development workflows to improve productivity and engineering outcomes.

- Contribute to AI-powered product capabilities that enhance automation, data processing, and customer-facing intelligence.

- Improve deployment frequency, code quality, and automated test coverage through CI/CD pipelines and engineering best practices.

- Strengthen system reliability, reduce production incidents, and improve observability through proactive monitoring and sound architectural decisions.

- Lead technical design discussions and contribute to architectural decisions involving complex, distributed systems.

- Mentor team members, provide constructive feedback, and promote high standards of technical excellence, ownership, and accountability.

- Collaborate with international engineering, product, and business teams to deliver solutions aligned with customer and business needs.

Requirements:

- Bachelor's degree in Computer Science, Computer Engineering, Information Systems, or a related field.

- At least 5 years of professional software development experience, including 3+ years working at a senior-level scope.

- Strong hands-on experience with .NET Core and C#, particularly in building scalable APIs and backend services.

- Demonstrated experience using AI tools and technologies to achieve measurable improvements in engineering productivity, automation, development cycle time, or software quality. Occasional or superficial AI usage is not sufficient.