EP
Senior Staff Software Engineer – .NET |C# |AWS | E-Commerce
Elan Partners
🇺🇸 United States
On-site
Staff / Principal
4 weeks ago
- .NET
- C#
- AWS
- System Design
- Design Systems
- Microservices
- ECS
- EKS
- RDS
- SQS
- Incident Response
- PCI DSS
- AI
- Claude
4 weeks ago
Full Time, On Site in Dallas
No Agencies, No Sponsorship, No 3rd Parties
Position Overview / Ideal Candidate
Élan Partners is seeking a Senior Staff Software Engineer with deep .NET/C# expertise to design and help drive the backend architecture of a large-scale, consumer-facing commerce platform processing billions of dollars in annual transactions. This is a highly technical, hands-on engineering role for someone operating between the Senior and Principal level, with near-architect-level system design capabilities. The ideal candidate has experience building high-volume, customer-facing transactional systems from the ground up and understands what it takes to design systems for scale, reliability, performance, and security. The environment is cloud-native and AWS-based, with a core backend stack of .NET and C#. Experience with e-commerce, payments, PCI-regulated platforms, ordering, fulfillment, or other high-throughput transactional environments is strongly preferred.
Required Qualifications
- Advanced hands-on development experience with.NET and C#
- Strongsystem design and distributed systems architecture experience
- Experience designing and scalingmicroservices-based, cloud-native applications
- Deep experience withAWS, including services such as ECS/EKS, RDS, SQS, and related cloud infrastructure
- Experience building or playing a significant role in building ahigh-volume, customer-facing transactional platform from the ground up
- Experience designing systems wherescalability, availability, latency, data integrity, and fault tolerance are critical
- Experience supporting highly available, production-critical applications
- Strong understanding of observability, monitoring, incident response, and long-term system resilience
- Ability to identify and resolve performance bottlenecks, scaling challenges, and architectural risks
- Strong technical leadership skills with the ability to establish engineering standards and mentor other engineers
- Excellent communication skills
- Experience withine-commerce, payments, PCI-DSS, ordering, fulfillment, or other high-volume transactional environments
- Experience building multiple large-scale transactional platforms or participating in multiple significant ground-up implementations
- Experience designing systems forPCI-DSS compliance, secure data handling, and fraud-prevention considerations
- Experience establishing backend architecture patterns and engineering best practices across development teams
- Thoughtful, practical use ofAI-assisted engineering tools, such as Claude or similar development-focused tools, while maintaining strong engineering fundamentals and technical judgment
Responsibilities
- Design and own distributed backend systems using.NET/C# within a cloud-native AWS environment
- Build and scale microservices supporting high-throughput transactional workloads
- Lead system design and architectural decisions impacting performance, scalability, reliability, and security
- Ensure mission-critical services meet demanding requirements for availability, latency, fault tolerance, and data integrity
- Design and maintain secure systems supporting PCI-DSS and transactional processing requirements
- Drive improvements in system observability, monitoring, incident response, and production health
- Identify and resolve system bottlenecks, architectural risks, and scaling challenges
- Define backend engineering standards, architectural patterns, and development best practices
- Partner with product and business stakeholders to translate complex requirements into scalable technical solutions
- Mentor engineers and help elevate technical capability across the engineering organization
Senior Staff Software Engineer – .NET |C# |AWS | E-Commerce · Elan Partners