Senior Software Engineer, AWS Cloud Infrastructure
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Job Description
Senior Software Engineer owning secure, scalable AWS infrastructure and production operations. Supporting Praxis’s genetic-medicine development for central nervous system disorders.
Responsibilities:
- Own and evolve AWS architecture for enterprise workloads, including multi-account foundations, landing zones/Control Tower, networking, security baselines, and shared platforms
- Establish and improve AWS governance, including organizational structure, SCPs, tagging, cost controls, compliance, audit readiness, and operational standards
- Design and operate AWS identity and access using IAM, IAM Identity Center, and Microsoft Entra ID integrations for SSO, federation, role mapping, access reviews, and least privilege
- Build, harden, and operate AWS platforms and full-stack services using TypeScript and Python
- Drive operational excellence through monitoring, alerting, dashboards, SLOs/SLIs, runbooks, incident response, and durable fixes
- Participate in the on-call rotation and own incidents through resolution and learning
- Automate infrastructure and delivery using Infrastructure as Code and CI/CD
- Partner with engineering and IT to deliver secure, maintainable solutions and improve production readiness
- Mentor other engineers and promote sound operational practices
Requirements:
- Senior-level software engineering experience with substantial hands-on experience building and operating production systems on AWS
- Strong full-stack engineering capability in TypeScript and Python, including APIs, services, tooling, and cloud automation
- Deep experience with AWS IAM, Organizations, VPC, EC2, ECS/EKS or Lambda, S3, RDS/DynamoDB, CloudWatch, KMS, Config, and GuardDuty
- Ability to design and operate AWS governance at scale, including multi-account strategy, policy guardrails, access control, security standards, and operational controls
- Strong AWS networking fundamentals, including VPNs, peering, Transit Gateway, routing, DNS, and hybrid connectivity
- Enterprise SSO experience; Microsoft Entra ID federation into AWS strongly preferred, including SAML/OIDC, IAM Identity Center, application and role mapping, and access lifecycle practices
- Experience in regulated or audit-ready environments, with change control, evidence and traceability, least privilege, and durable controls
- Demonstrated operational ownership, including alerts, monitoring, incident response, reliability improvement, and post-incident engineering improvements
- Strong Infrastructure as Code experience; Pulumi and/or SST strongly preferred; Terraform or AWS CDK transferable and welcome
- Experience with Bitbucket Pipelines and/or GitHub Actions
- Proficiency with modern AI coding and productivity tools, with judgment to validate outputs, test changes, manage risk, and maintain production quality
- Comfort with regular computer and screen work, clear communication, basic hand coordination, focus, and occasional movement
Benefits:
- 99% of the premium paid for medical, dental and vision plans
- Company-paid life insurance
- AD&D
- Disability benefits
- Voluntary plans to personalize coverage
- Dollar-for-dollar 401(k) match up to 6% on eligible contributions
- Long-term stock incentives
- ESPP
- Discretionary quarterly bonus
- Extremely flexible wellness benefit
- Generous PTO
- Paid holidays
- Company-wide shutdowns
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