Senior Cloud Applications Architect – AWS / .NET / Endur

We are seeking a Senior Cloud Applications Architect to join a major application migration and modernization program for a large U.S.-based enterprise in the energy sector.

The architect will work alongside an AWS Professional Services engineering team, client application architects, infrastructure engineers, developers, security specialists, and operations teams to migrate and modernize two significant enterprise application platforms: Endur and SQMD.

The role spans both migration and modernization.

For Endur, the architect will focus on automated/scripted application installation, repeatable application packaging, environment configuration, and deployment of .NET and JVS extensions into the new AWS environments.

For SQMD, the role will have a stronger modernization focus, including .NET application modernization, containerization using Amazon ECS, authentication integration, and refactoring existing messaging patterns to use Amazon SQS and SNS.

This is not purely an advisory architecture position. The successful candidate should be comfortable moving between architecture, hands-on engineering, troubleshooting, deployment automation, code-level discussions, and direct customer interaction.

Key Responsibilities

Endur Application Migration

• Lead the application architecture and engineering activities required to migrate Endur workloads from legacy infrastructure to AWS.

• Design and implement repeatable scripted and packaged Endur installation processes.

• Automate application installation and configuration wherever possible to support multiple Endur environments.

• Define application configuration and deployment patterns across development, testing, staging, disaster recovery, and production environments.

• Coordinate application installation with infrastructure provisioning performed through Terraform.

• Identify and document application dependencies, configuration requirements, connectivity requirements, and integration points.

Endur Extensions & Deployment

• Design and implement deployment processes for Endur .NET and JVS extensions.

• Establish repeatable packaging, versioning, configuration, deployment, and rollback mechanisms.

• Work with Endur development teams to understand existing customizations and determine migration requirements.

• Troubleshoot extension compatibility, configuration, integration, and deployment issues.

• Support testing and validation of migrated Endur components.

SQMD Application Modernization

• Lead the application modernization of the SQMD .NET platform for deployment on AWS.

• Assess legacy application components and determine appropriate modernization and refactoring approaches.

• Refactor and modernize .NET components while preserving required business functionality.

• Reduce infrastructure coupling and move appropriate workloads toward cloud-native application patterns.

• Identify components that can be replatformed versus those requiring deeper refactoring.

ECS Containerization

• Design and implement containerization of SQMD application components.

• Create and optimize Docker-based application packaging.

• Deploy and operate containerized workloads using Amazon ECS.

• Define:

• ECS services

• Task definitions

• Container configuration

• Environment configuration

• Service scaling

• Health checks

• Logging

• Secrets and configuration management

• Integrate container builds and deployments into automated CI/CD processes.

• Support use of Amazon ECR and associated container lifecycle processes.

Messaging Modernization

• Refactor legacy messaging and application integration patterns using:

• Amazon SQS

• Amazon SNS

• Design reliable asynchronous communication patterns between application components.

• Address messaging concerns such as:

• Retry behavior

• Dead-letter queues

• Failure handling

• Message duplication

• Idempotency

• Ordering requirements

• Error recovery

• Observability

• Work with upstream and downstream application teams to minimize disruption while modernizing messaging interfaces.

Authentication & Security

• Implement and integrate required MEA authentication patterns within the modernized application environment.

• Work with client security and identity teams to ensure authentication and authorization requirements are correctly implemented.

• Ensure sensitive configuration, credentials, certificates, and application secrets are securely managed.

• Apply secure application architecture principles to modernized .NET and containerized workloads.

Application Deployment & DevOps

• Establish automated build, package, configuration, and deployment patterns.

• Work with engineering teams to create robust CI/CD processes for Endur extensions and SQMD services.

• Support separation of application configuration from application code.

• Establish consistent promotion processes between environments.

• Design effective rollback and recovery mechanisms.

• Improve application logging, monitoring, health checks, and operational diagnostics.

Architecture & Migration

• Participate in discovery of legacy application architectures and dependencies.

• Define target-state and transitional application architectures.

• Develop migration sequencing and application cutover approaches.

• Identify technical risks and recommend practical mitigation strategies.

• Support migration rehearsals, testing, production cutovers, and post-migration stabilization.

• Troubleshoot complex issues across application, infrastructure, networking, databases, messaging, and security layers.

Collaboration with AWS Professional Services

• Work as an integrated member of a combined client, AWS Professional Services, and delivery engineering team.

• Participate actively in AWS architecture sessions, technical workshops, design reviews, and engineering working sessions.

• Translate architectural recommendations into practical engineering solutions.

• Clearly document technical decisions, dependencies, assumptions, and risks.

• Coordinate closely with the Cloud Infrastructure Architect to ensure application and infrastructure architectures remain aligned.

Required Qualifications

• 8+ years of professional software engineering, application architecture, or cloud application modernization experience.

• Strong hands-on experience with C# and .NET, including enterprise applications.

• Significant experience migrating or modernizing .NET applications on AWS.

• Strong AWS application architecture knowledge, particularly:

• Amazon ECS

• Amazon ECR

• Amazon SQS

• Amazon SNS

• IAM

• CloudWatch

• Secrets Manager / Parameter Store

• EC2

• Application Load Balancing

• Strong experience with Docker and containerized applications.

• Experience designing, deploying, and troubleshooting workloads running on Amazon ECS.

• Strong knowledge of event-driven and asynchronous application architectures.

• Hands-on experience with SQS/SNS-based messaging and integration patterns.

• Experience modernizing legacy enterprise .NET applications.

• Experience designing and implementing automated application deployment pipelines.

• Strong scripting and automation capabilities.

• Strong understanding of authentication, authorization, secure configuration, and secrets management.

• Experience with application migration planning, testing, cutover, rollback, and production stabilization.

Endur Experience

Experience with ION/Openlink Endur is strongly preferred, particularly experience involving:

• Endur application installation and configuration

• Endur environment management

• JVS extensions

• .NET extensions

• Extension packaging and deployment

• Endur integration architecture

• Automated or scripted Endur deployments

Candidates with deep enterprise application modernization experience but limited direct Endur experience may also be considered where they can demonstrate the ability to rapidly understand complex application platforms.

Development & Engineering Mindset

The successful candidate should remain technically hands-on.

We are looking for an architect who can:

• Read and understand existing application code.

• Work directly with developers on refactoring decisions.

• Develop prototypes and reference implementations when required.

• Troubleshoot failed deployments and application behavior.

• Review code and deployment patterns.

• Understand legacy architectures before recommending modernization.

• Balance ideal cloud architecture with practical migration constraints.

Customer-Facing Requirements

This is a highly visible customer-facing role.

Candidates must demonstrate:

• Excellent spoken and written English – C1 or equivalent business fluency strongly preferred.

• Strong communication skills with U.S.-based architects, engineers, product owners, project managers, and senior stakeholders.

• Professional and confident presence during video calls, architecture workshops, and technical presentations.

• Ability to simplify complex architecture and application topics for different audiences.

• Confidence presenting architecture diagrams and technical recommendations.

• Ability to facilitate technical discussions and drive teams toward decisions.

• Strong listening skills and the ability to understand both business and technical requirements.

• High levels of ownership, organization, and accountability.

Because this is a remote client-facing position, candidates should be comfortable participating frequently in video meetings with their camera on and representing the engineering team professionally.

Preferred Qualifications

• AWS Solutions Architect or AWS Developer certification.

• Previous experience working alongside AWS Professional Services.

• ION/Openlink Endur development or architecture experience.

• Strong PowerShell or equivalent scripting experience.

• Experience migrating Windows/.NET workloads to AWS.

• Experience modernizing .NET Framework applications to modern .NET.

• Experience with event-driven architectures.

• Experience designing enterprise messaging solutions.

• Experience within energy, utilities, commodity trading, financial services, or other complex enterprise environments.

• Experience working with distributed global engineering teams.

Location & Working Model

The position is remote and based in Latin America.

Candidates must be able to maintain significant overlap with U.S. working hours and participate in architecture workshops, engineering sessions, migration activities, and production cutovers as required.

What Success Looks Like

Success in this role means moving Endur and SQMD from legacy application deployment models toward repeatable, automated, supportable AWS architectures while carefully managing migration risk.

The architect will help ensure Endur can be reliably deployed and operated across its new AWS environments while simultaneously helping transform SQMD into a more modern, containerized, cloud-native .NET platform.

The ideal candidate combines strong application architecture, hands-on .NET engineering, AWS modernization experience, and excellent client-facing communication skills.