At ARCOS, we don’t just build software—we innovate, transform, and push boundaries. We’re searching for a Senior Software Engineer to join our dynamic team—a technical leader and mentor who thrives on solving complex challenges and driving impactful solutions. If you have a passion for scalable system design, secure and high-performing software, and empowering others through mentorship, this is the role for you. We value not only technical excellence but also proactive collaboration, strategic thinking, and a relentless drive to deliver results. What you'll do + Technical Leadership: Lead the design and development of software aligned with ARCOS’s strategic goals. Promote code quality and engineering best practices (clean code, design patterns, code reviews, and unit testing). Solve complex technical challenges with both short-term and long-term solutions. + Team Collaboration: Work closely with team members across departments. Mentor junior engineers, guiding their technical and professional growth. + Execution & Delivery: Operate within an Agile Scrum framework—actively participating in stand-ups, sprint planning, backlog grooming, and retrospectives. Take ownership of projects, ensuring timely, high-quality deliveries. + Continuous Improvement: Identify and advocate for process improvements. Stay current with emerging technologies and lead the adoption of innovations when appropriate. + Production Support: Troubleshoot and resolve production issues, including outside regular work hours when critical. + Communication: Collaborate with product teams, UI/UX engineers, and other stakeholders to align technical solutions with business goals. Simplify complex technical concepts for non-technical stakeholders. What you bring: + Experience: 5+ years of full-stack enterprise software development experience (UI, backend, API, database). + Strong foundation in software design principles and architectural patterns. + Proven ability to tackle technical challenges and mentor teams. + Effective communication skills for both technical and non-technical audiences. + Experience with Agile development, CI/CD, and secure software practices. + Expertise in building multi-tenant, cloud-based, high-availability applications. + History of leading software projects across Web and Mobile platforms. Required: + C#, .NET (Framework 4.8 / Core 1.0 and above), ASP.NET, SQL (relational) databases, REST + JavaScript/TypeScript, HTML/CSS, Angular or similar JavaScript frameworks + Unit testing (xUnit, Moq/NSubstitute), Design patterns, Git or equivalent version control + Cloud-native development with AWS or equivalent Company Culture At ARCOS, we believe in fostering a culture of ownership, accountability, and teamwork. We value the collective strength of our team and understand that our success results from our collaborative efforts. We're not just looking for employees; we're seeking partners in our mission. If you take pride in your work, are always eager to learn and grow, and believe in the power of teamwork, we want you on our team.