Are you passionate about building large-scale messaging infrastructure that powers critical customer communications? Join the AWS End User Messaging to build intelligent routing systems and templated messaging solutions that enable enterprises to reach their users reliably and efficiently. We are ramping up the team to deliver innovative features that provide customers with immediate access to pre-approved messaging templates and AWS-managed identities for transactional messaging. The AWS End User Messaging team is recruiting a Software Development Engineer I who will contribute to building and scaling messaging routing infrastructure including SMS, Voice, and RCS channels. You will work on projects such as: - Routing Services: Building templated messaging APIs with intelligent routing between customer-owned and AWS-managed phone numbers - Fraud Protection Systems: Implementing systems to detect and prevent fraudulent traffic, protecting customers from unexpected costs while maintaining legitimate message delivery - Cross-Region Routing: Developing distributed systems that optimize message delivery across global phone number pools - Automated Failover Mechanisms: Creating intelligent routing systems that automatically detect delivery issues and reroute traffic to ensure high message delivery rates You will collaborate with experienced engineers, product managers, and other technology leaders at Amazon to translate customer needs into scalable features. This is an excellent opportunity to work on distributed systems at massive scale while learning from a team that operates across multiple AWS regions. What We're Looking For The ideal candidate will have: - Bachelor's degree in Computer Science, Engineering, or related field (or equivalent practical experience) - Strong foundation in object-oriented programming, data structures, and algorithms - Experience with or eagerness to learn distributed systems and cloud services - Passion for building customer-facing features and solving complex technical challenges - Strong communication skills and ability to collaborate effectively with cross-functional teams - Ownership mindset and willingness to learn from experienced engineers Key job responsibilities As a Software Development Engineer II on the SMS Routes team, you will: - Design and Implement Scalable Services: Build new microservices and APIs for templated messaging, routing logic, and fraud protection using modern development practices and AWS services - Own End-to-End Features: Take ownership of features from design through deployment, including writing comprehensive tests, creating operational dashboards, and participating in on-call rotations - Collaborate on Technical Design: Participate in design reviews, contribute to architecture decisions, and learn best practices for building fault-tolerant, highly available messaging systems - Optimize Message Delivery: Work on intelligent routing algorithms that select optimal origination identities based on destination country, carrier relationships, and delivery performance metrics - Build Fraud Protection Systems: Develop and enhance capabilities that analyze traffic patterns, detect suspicious activity, and automatically block fraudulent messages while minimizing false positives - Ensure Quality and Reliability: Write comprehensive tests, participate in code reviews, and contribute to the team's commitment to quality and operational excellence - Learn and Grow: Develop expertise in telephony ecosystems, carrier integrations, compliance requirements, fraud detection systems, and AWS service development practices - Mentor and grow junior engineers on the team A day in the life Why Join AWS End User Messaging? - Immediate Customer Impact: Your work will power critical customer communications daily - Modern Development Practices: Work with AI-assisted development tools, comprehensive testing infrastructure, and rapid deployment cycles - Learning Opportunities: Gain expertise in distributed systems, telephony infrastructure, carrier relationships, fraud detection, and AWS service development - Innovative Projects: Contribute to state of the art features like cross-channel messaging, intelligent routing, fraud protection systems, and automated failover mechanisms - Strong Team Culture: Join a team that values test-driven development, operational excellence, and continuous learning BASIC QUALIFICATIONS - 3+ years of non-internship professional software development experience - 2+ years of non-internship design or architecture (design patterns, reliability and scaling) of new and existing systems experience - 1+ years of software development engineer or related occupational experience - 1+ years of designing and developing large-scale, multi-tiered, multi-threaded, embedded or distributed software applications, tools, systems, and services using: C#, C++, Java, or Perl experience - 1+ years of Object Oriented Design experience - Bachelor's degree or foreign equivalent in Computer Science, Engineering, Mathematics, or a related field - Experience programming with at least one software programming language PREFERRED QUALIFICATIONS - 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience - Bachelor's degree in computer science or equivalent The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at https://amazon.jobs/en/benefits. USA, WA, Seattle - 143,700.00 - 194,400.00 USD annually