Senior Infrastructure

2 days ago

Manila, National Capital Region, Philippines CashJar Full time $150,000 - $200,000 per year

Senior Infrastructure & DevOps Engineer - .NET Payment Platform

You'll be architecting and scaling a .NET 8-based payment orchestration platform on AWS, supporting calculation engines, multi-party settlements, and immutable ledger systems. This role involves building enterprise-grade infrastructure optimized for high-performance .NET applications and MSSQL at payment processing scale, with GitHub as the central hub for all development and deployment workflows.

Core Responsibilities

Infrastructure Architecture & Scaling

  • Design auto-scaling AWS infrastructure for .NET 8 applications handling 5-20M monthly transactions with sub-100ms latency
  • Architect hybrid Windows/Linux environments optimizing .NET 8 performance on AWS (ECS Fargate, EC2, App Runner)
  • Build high-availability MSSQL clusters with read replicas for real-time transaction processing and reporting
  • Implement container orchestration strategies specifically optimized for .NET microservices

GitHub-Centric DevOps

  • Design and implement comprehensive CI/CD pipelines using GitHub Actions for .NET 8 applications
  • Build GitHub-native deployment workflows supporting feature branches, staging, and production environments
  • Implement GitHub-based Infrastructure as Code workflows using Terraform/CloudFormation
  • Establish GitHub security scanning, dependency management, and compliance validation pipelines

Database Infrastructure & Performance

  • Architect MSSQL Always On availability groups across multiple AWS AZs
  • Optimize MSSQL performance for high-frequency BIN lookups, transaction processing, and immutable ledger writes
  • Implement database sharding strategies for transaction volume scaling
  • Build automated backup, point-in-time recovery, and disaster recovery for financial data

Security & Compliance Infrastructure

  • Configure GitHub security features: secret scanning, code scanning, dependency reviews
  • Establish SQL Server Transparent Data Encryption (TDE) and Always Encrypted for sensitive payment data
  • Build comprehensive audit logging infrastructure supporting MSSQL audit trails and .NET application logging

Required Technical Expertise

GitHub & CI/CD Mastery

  • Expert-level GitHub Actions experience including complex workflow orchestration
  • Proficiency with GitHub Packages for .NET NuGet package management
  • Experience with GitHub Environments, protection rules, and deployment approvals
  • Knowledge of GitHub security features: Dependabot, CodeQL, secret scanning
  • Knowledge on adding Code Scanning Tools like Snyk, Sonar, CodeScene and alike and integration with AI tools like Code Rabbit

Microsoft Stack on AWS

  • 5+ years experience running .NET applications on AWS at enterprise scale
  • Expert knowledge of: ECS/Fargate for .NET containers, RDS SQL Server, ElastiCache
  • Experience with .NET 8 performance optimization, memory management, and garbage collection tuning
  • Proficiency with Windows containers, Linux containers, and hybrid deployment models

Database Expertise

  • Expert-level MSSQL administration: Always On, performance tuning, index optimization
  • Experience scaling MSSQL to handle millions of transactions with sub-second response times
  • Knowledge of SQL Server security features: TDE, Always Encrypted, Row Level Security
  • Understanding of database design patterns for financial systems and audit trails

Infrastructure as Code

  • Terraform or AWS CloudFormation with GitHub Actions integration
  • AWS CDK for .NET (preferred) for infrastructure provisioning
  • GitHub-based infrastructure change management and approval workflows
  • Experience with GitOps patterns for infrastructure deployment

Specific Technical Requirements

GitHub Actions Workflows

  • Multi-environment deployment pipelines (.NET build → test → deploy)
  • Database migration workflows integrated with application deployments
  • ReactJS build and deployment to S3/CloudFront via GitHub Actions
  • Automated security scanning and compliance validation in CI/CD
  • Infrastructure provisioning and updates through GitHub-triggered workflows

Application Infrastructure

  • Container orchestration for .NET 8 microservices (ECS Fargate preferred)
  • Application Load Balancer configuration optimized for .NET routing patterns
  • Auto-scaling policies tuned for .NET application startup characteristics
  • GitHub Packages integration for private NuGet repositories

Database Architecture

  • MSSQL Always On Availability Groups across 3 AZs
  • Database deployment automation through GitHub Actions and SQL migration scripts
  • Read replicas for reporting and analytics workloads
    Automated failover with

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