Software Development Engineer, AWS DMS

AWS Database Migration Service (DMS) has migrated more than 1.5 million database workloads to AWS, helping enterprises move from commercial databases (Oracle, SQL Server, DB2) to open-source Amazon Aurora and RDS (PostgreSQL, MySQL). The service is used by customers across the world to migrate their most important data from their on-premises datacenters to Amazon services. Our customers depend on our services' reliability and security to handle their business data. More information on AWS DMS is available at http://aws.amazon.com/dms. As an SDE2 on the DMS team, you will work directly on the core C/C++ replication engine that powers heterogeneous database migrations for tens of thousands of customers running large-scale production fleets. You'll focus on the PostgreSQL, Oracle, and SQL Server endpoints - the highest-volume migration paths driving Aurora and RDS growth. Your work will directly impact migration reliability, security compliance, and the experience of customers migrating their most critical production databases to AWS. AWS Database Migration Service (DMS) is a part of AWS Utility Computing (UC) which provides product innovations — from foundational services such as Amazon’s Simple Storage Service (S3) and Amazon Elastic Compute Cloud (EC2), to consistently released new product innovations that continue to set AWS’s services and features apart in the industry. As a member of the UC organization, you’ll support the development and management of Compute, Database, Storage, Internet of Things (Iot), Platform, and Productivity Apps services in AWS, including support for customers who require specialized security solutions for their cloud services. Key job responsibilities Design, implement, and ship fixes and features in the C/C++ replication engine for PostgreSQL, Oracle, and SQL Server source/target endpoints. Diagnose and resolve complex production issues - task crashes, memory corruption, CDC failures, data validation errors - using core dump analysis, memory profilers (AddressSanitizer, Valgrind), and systematic debugging. Develop and expand automated test coverage using the Scalable Test Platform (STP), including combinatorial testing scenarios that exercise millions of parameter combinations across migration paths. Deliver security fixes within SLA and contribute to security compliance initiatives including vulnerability remediation, credential exposure prevention, and secure supply chain builds. Participate in code reviews, design discussions, and release management for our deployment cadence serving hundreds of thousands of production instances. Collaborate with Database Engineers to reproduce and fix customer-reported issues, translating ambiguous production failures into root causes and verified fixes. Leverage and contribute to AI-powered engineering tools (Meshclaw autonomous bug-fixing, Kiro-based on-call agent) to accelerate defect detection and resolution. Participate in on-call rotation, triaging production incidents and driving them to resolution. A day in the life You might start the day investigating a crash signature affecting thousands of customer tasks - analyzing the core dump, identifying a use-after-free in a CDC thread shutdown path, and writing a fix with a coordinated shutdown mechanism. After code review, you write an automated test that reproduces the race condition under concurrent load. In the afternoon, you're working on a security fix, ensuring the remediation doesn't regress existing customer behavior. You end the day reviewing a CR from a teammate fixing a PostgreSQL logical decoding edge case, and updating the crash classifier with a new signature your fix will eliminate. About the team Our team is dedicated to supporting new members. We have a broad mix of experience levels and tenures, and we're building an environment that celebrates knowledge-sharing and mentorship. Our senior members enjoy one-on-one mentoring and thorough, but kind, code reviews. We care about your career growth and strive to assign projects that help our team members develop your engineering expertise so you feel empowered to take on more complex tasks in the future. The DMS engine team operates across Dublin, Poland, and the US. We're a team that takes ownership of a complex system and makes it better every release -reducing crashes, closing security gaps, and making migrations reliable enough that customers don't need our help to succeed. We leverage AI extensively: from autonomous bug-fixing to an on-call agent that cuts troubleshooting time dramatically. Diverse Experiences AWS values diverse experiences. Even if you do not meet all of the qualifications and skills listed in the job description, we encourage candidates to apply. If your career is just starting, hasn’t followed a traditional path, or includes alternative experiences, don’t let it stop you from applying. Why AWS? Amazon Web Services (AWS) is the world’s most comprehensive and broadly adopted cloud platform. We pioneered cloud computing and never stopped innovating — that’s why customers from the most successful startups to Global 500 companies trust our robust suite of products and services to power their businesses. Inclusive Team Culture AWS values curiosity and connection. Our employee-led and company-sponsored affinity groups promote inclusion and empower our people to take pride in what makes us unique. Our inclusion events foster stronger, more collaborative teams. Our continual innovation is fueled by the bold ideas, fresh perspectives, and passionate voices our teams bring to everything we do. Mentorship & Career Growth We’re continuously raising our performance bar as we strive to become Earth’s Best Employer. That’s why you’ll find endless knowledge-sharing, mentorship and other career-advancing resources here to help you develop into a better-rounded professional. Work/Life Balance We value work-life harmony. Achieving success at work should never come at the expense of sacrifices at home, which is why flexible work hours and arrangements are part of our culture. When we feel supported in the workplace and at home, there’s nothing we can’t achieve. - Experience programming with at least one software programming language, or experience in embedded development in C/C++ - Experience with database replication technologies: CDC (Change Data Capture), logical replication, log-based capture (LogMiner, fn_dblog, pgoutput) - Experience with security vulnerability remediation in production systems - Experience building automated test frameworks or improving test coverage for complex systems - Experience with memory safety tooling (AddressSanitizer, ThreadSanitizer, Helgrind) - Experience operating services at scale (multi-region deployments, large customer fleets) - Experience with release management and deployment pipelines for large fleets Amazon is an equal opportunities employer. We believe passionately that employing a diverse workforce is central to our success. We make recruiting decisions based on your experience and skills. 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