Software Dev Engineer II, AWS End User Messaging

As part of the AWS Applied AI Solutions organization, we have a vision to provide business applications, leveraging Amazons unique experience and expertise, that are used by millions of companies worldwide to manage day-to-day operations. We will accomplish this by accelerating our customers businesses through delivery of intuitive and differentiated technology solutions that solve enduring business challenges. We blend vision with curiosity and Amazons real-world experience to build opinionated, turnkey solutions. Where customers prefer to buy over build, we become their trusted partner with solutions that are no-brainers to buy and easy to use.

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 Were Looking For The ideal candidate will have:

• Bachelors 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 teams 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

About the team Diverse Experiences Amazon values diverse experiences. Even if you do not meet all of the preferred qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasnt followed a traditional path, or includes alternative experiences, dont let it stop you from applying.

Why AWS Amazon Web Services (AWS) is the worlds most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating - thats why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses.

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