Software Development Engineer - Excise Team

What You'll Do
Avalara's Excise compliance platform processes tax filings across the US, Canada, and Europe, supporting thousands of customers with complex, jurisdiction-specific return and eFile requirements. As part of this team, you will play a direct role as Avalara accelerates its AI-first engineering strategy. You will help expand Excise form coverage, improve platform reliability, and embed AI-assisted development into the team's daily workflows to increase engineering velocity. This role involves improving not only what we build, but how work gets done—strengthening architectural discipline and setting new standards for execution. Casual AI usage is insufficient. AI must materially improve outcomes. This position is also open to people with disabilities (PcD), in accordance with Law No. 8.213/91 (Esta vaga também é destinada a pessoas com deficiência (PcD), conforme Lei nº 8.213/91).
What Your Responsibilities Will Be
- Deliver scalable, secure, backend and frontend systems that support Avalara's global compliance platform.
- Develop ASP.NET Core applications and back-end services, focusing on the return and eFile engines.
- Maintain existing Excise tax returns and develop all tax forms for the United States, Canada, and Europe.
- Increase development efficiency by embedding AI-assisted coding, testing, documentation, and architectural exploration into daily workflows.
- Contribute to AI-enabled product features that enhance automation, data processing, and customer-facing intelligence.
- Improve deployment frequency, code quality, and automated test coverage through CI/CD and engineering best practices.
- Reduce production incidents and improve system observability through thoughtful architecture and proactive monitoring.
- Lead technical design discussions and influence architectural decisions for complex, distributed systems.
- Raise the performance of the team through mentoring, peer feedback, and high standards of ownership and accountability.
- Collaborate with global engineering, product, and team members.

What You'll Need To Be Successful
Required Qualifications:
- BSc. in Computer Science, Computer Engineering, System Information, etc.
- 5 years of professional experience (3+ years of professional experience aligned to senior-level scope)
- Strong hands-on experience with .NET Core (C#) building scalable APIs and services.
- Demonstrated hands-on AI usage that improved measurable business or engineering outcomes (casual AI usage is insufficient; we look for material improvements in cycle time, automation, or quality).
- Ability to AI responsibly and securely, critically evaluate AI-generated outputs, and implement governance-aware best practices.
- Experience communicating updates and resolutions to customers and other partners for global collaboration.
- A Bar Raiser mindset with high standards of ownership, quality, and accountability, and strong judgment in architectural and technical tradeoffs.
- Experience with AWS cloud environments and Infrastructure as Code (Terraform).
- Experience with CI/CD pipelines (e.g., GitLab) and Docker and Kubernetes in production environments.
- Experience with relational databases, especially Microsoft SQL Server, and writing SQL queries.
- Strong knowledge of automated testing strategies.

Bar Raiser Expectations:
At Avalara, we hire only Bar Raisers — individuals who improve the average performance of the team. This engineer will:
- Hold high standards of ownership, quality, and accountability.
- Use strong judgment in architectural and technical tradeoffs.
- Improve the performance of peers through coaching and example.
- Leave systems, processes, and documentation stronger than they found them.

Avalara is an AI-first Company
AI is embedded in our workflows, decision-making, and products. Success here requires embracing AI as an essential capability. You'll bring experience using AI and AI-related technologies, ready to thrive here. You'll AI every day to bu