Software Development Engineer - .Net/C#

What You'll Do
Avalara is accelerating the delivery of AI-enabled capabilities across our compliance platform to improve customer experience, increase engineering velocity, and scale global operations efficiently. As transaction volumes, product complexity, and AI-driven initiatives expand, we require engineers who can deliver high-quality software consistently and grow their scope of impact over time. Engineers in this role will be embedded in the Brazil Returns engineering team, working directly on the Tax Compliance platform, a high-criticality, cloud-based solution that automates the generation and submission of Brazilian fiscal obligations on behalf of hundreds of Brazilian entities. The platform integrates with multiple ERP systems, consolidates fiscal, accounting, and transactional data, applies complex regulatory business rules, and assembles validated electronic files for submission to Brazilian tax authorities within strict fiscal calendar deadlines. 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
Avalara is an AI-first company. Therefore, every role must raise the bar on how AI is applied to create measurable business impact. An AI Bar Raiser: Demonstrates applied AI capability — not just familiarity with tools. Uses AI to materially improve speed, quality, insight, automation, or scale. Identifies meaningful AI opportunities tied to revenue, efficiency, customer experience, or risk reduction. Applies AI responsibly, securely, and ethically. s AI best practices and helps elevate the AI capability of others. Casual or occasional AI usage is not sufficient. AI Bar Raisers embed AI into how work gets done. Candidates must be able to: Provide specific examples of how they used AI to improve measurable outcomes. Quantify impact (time saved, cost reduced, revenue influenced, quality improved). Explain their decision-making process in selecting tools and approaches. Discuss risks, governance, and responsible AI use. Deliver scalable, secure, and high-performing backend and frontend systems that support Avalara's global compliance platform. Improve code quality and automated test coverage through CI/CD and engineering best practices. Reduce production incidents by writing observable, well-structured code and participating in proactive monitoring. Elevate engineering standards, improving every codebase, pipeline, and architecture artifact, through rigorous testing, clean code, and comprehensive documentation.
What You'll Need To Be Successful
Strong English communication skills (written and spoken) for global collaboration. B.S. in Computer Science or Engineering. 5+ years of professional software engineering experience. Solid hands-on experience with .NET (C#) building scalable APIs and services. Experience with React (TypeScript) building maintainable frontend applications. Experience with distributed systems and RESTful and/or GraphQL APIs. Experience with AWS cloud environments. Experience with CI/CD pipelines (e.g., GitLab). Experience with Docker and Kubernetes. Experience with relational and/or NoSQL databases. Good knowledge of automated testing strategies. Demonstrated hands-on experience using AI tools to improve software engineering workflows and measurable delivery outcomes. Nice to have: Experience with Infrastructure as Code (Terraform). Experience in SaaS or enterprise-scale platforms. Experience in compliance, financial systems, or regulated domains. Experience collaborating across geographically distributed teams.
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 business challenges - improving efficiency, contributing