Senior .NET Backend & Cloud Engineer - Hybrid NYC

Seneca Resources; New York (NY); Hybrid; USD 110,000 - 121,000; Full time

Job summary

Seneca Resources is seeking a Senior .NET Backend & Cloud Software Engineer to design, build, and support a mission-critical E-Citations platform for New York City's public sector.

You will work on cloud-native services, secure APIs, and data pipelines, collaborating with Product, Cybersecurity, Infrastructure, Data Engineering, QA, and Enterprise Architecture to deliver scalable, production-ready systems. Hybrid work arrangement in NYC.

Qualifications

• 6+ years of professional software engineering experience building enterprise applications.
• Strong hands-on experience with C#, .NET, ASP.NET Core.
• Experience designing and developing cloud-native backend services and APIs.
• Hands-on experience with at least one major cloud platform (Azure, AWS, or GCP).
• Experience with containerization and orchestration technologies.
• Strong knowledge of REST APIs, enterprise integration patterns, and distributed systems.
• Experience working with: SQL Server, PostgreSQL, Azure SQL, NoSQL databases
• Experience building ETL/ELT pipelines and large-scale data integrations.
• Knowledge of OAuth 2.0, OIDC, JWT, RBAC/IAM, encryption, and Secure SDLC practices
• Experience with DevOps, Infrastructure-as-Code, CI/CD, automated testing, and observability tools

Responsibilities

• Design, develop, deploy, and support modern backend services using C#, .NET, and ASP.NET Core.
• Build scalable, high-performance applications supporting critical business workflows.
• Develop secure RESTful and SOAP APIs that integrate mobile, cloud, enterprise, and legacy platforms.
• Participate in architecture, technical design, code reviews, testing, releases, and production support.
• Write clean, maintainable, and well-tested code following software engineering best practices.
• Design and build cloud-native solutions using Azure, AWS, or Google Cloud Platform (GCP).
• Develop serverless applications using services such as Azure Functions or AWS Lambda.
• Build and support containerized applications utilizing Kubernetes, AKS, ECS/Fargate, GKE, or Cloud Run.
• Contribute to cloud architecture decisions focused on scalability, reliability, security, and performance.
• Implement Infrastructure-as-Code using Terraform, ARM/Bicep, CloudFormation, or similar tools.
• Design and implement integrations utilizing REST, SOAP, API Gateways, SFTP, PGP, messaging platforms, and enterprise integration patterns.
• Build resilient asynchronous, real-time, and batch processing solutions.
• Troubleshoot complex integration challenges across distributed systems and enterprise environments.
• Connect backend services to mobile applications, databases, cloud services, and legacy technologies.
• Develop workflow automation and event-driven solutions using technologies such as: Kafka, Azure Event, Hub, SNS/SQS, Pub/Sub, Durable Functions, Step Functions.
• Design and optimize relational and NoSQL data models.
• Build ETL/ELT processes and enterprise data integrations.
• Improve database performance, scalability, and reliability.

Skills

C# / .NET

ASP.NET Core

Cloud-native backend APIs

Azure AWS GCP

Containerization & Orchestration

REST APIs / Enterprise Integration

SQL/NoSQL databases

ETL/ELT pipelines

OAuth 2.0 / JWT / IAM

CI/CD / DevOps / IaC

Tools

Kubernetes

Docker

Terraform

Azure DevOps

GitHub Actions

GitLab CI/CD

Job description

Seneca Resources is seeking a Senior .NET Backend & Cloud Software Engineer to design, build, and support a mission-critical E-Citations platform for New York City's public sector.

You will work on cloud-native services, secure APIs, and data pipelines, collaborating with Product, Cybersecurity, Infrastructure, Data Engineering, QA, and Enterprise Architecture to deliver scalable, production-ready systems. Hybrid work arrangement in NYC.