Senior Software Development Engineer - AWS Cryptography, Transport libraries

Senior Software Development Engineer – AWS Cryptography, Transport libraries

Job :  | Amazon Development Center U.S., Inc.

The Transport Libraries team within AWS Cryptography builds and maintains open‑source TLS and QUIC libraries (s2n-tls, s2n-quic) that protect data in transit across all of AWS. We are looking for an experienced software developer passionate about practical cryptography, open source, and building  will work on post‑quantum cryptography, leverage GenAI to accelerate secure transitions, and help ensure every byte moving in and out of the cloud is protected.

• Own the full software development lifecycle—including defining, prioritizing, designing, building, and testing new features for AWS Cryptography.
• Deliver foundational cryptographic libraries integrated across all AWS front‑door services.
• Engage internal and external customers to identify gaps in data‑in‑transit protection and translate those into new features and products.
• Build solutions at scale to protect cloud workloads against "harvest now, decrypt later" (HNDL) threats.
• Leverage GenAI technologies to safely and efficiently transition AWS services to post‑quantum cryptography.

Our team embraces diversity and inclusion with ten employee‑led affinity groups and an overall culture focused on work‑lifes balance, flexibility, mentorship, and professional growth. We encourage one‑on‑one mentoring, thorough code reviews, and diverse career development paths.

• 5+ years of non‑internship professional software development experience.
• 5+ years of programming experience with at least one programming language.
• 5+ years of leading design or architecture of new and existing systems (design patterns, reliability, and scaling).
• Experience as a mentor, tech lead, or engineering team leader.

• 5+ years of the full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations.
• Bachelor’s degree in computer science or an equivalent field.

The base salary range for this position is $ – $ USD annually. Your Amazon package will include sign‑on payments and restricted stock units (RSUs). Final compensation will be determined based on experience, qualifications, and location. We offer comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D, supplemental life plans), Employee Assistance Program (EAP), mental health support, medical advice line, flexible spending accounts, adoption and surrogacy reimbursement, 401(k) matching, paid time off, and parental leave.

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, please visit (Use the "Apply for this Job" box below). for more information.