Tuyển dụng Senior .NET Modernization Lead tại Hồ Chí Minh

First 60-90 days

Take ownership of the codebase. Ship the final internal-launch scope on the legacy stack. Establish observability and deployment discipline in the existing environment.

Migration sequencing

• Design and lead the project-by-project modernization plan. Preserve DB-per-tenant model and PHI field-level encryption at every step.
• Runtime & framework porting: Lead the port from .NET Framework 4.5-4.6 to .NET 8/9. Move ASP.
• NET MVC 5 / Web API 2 to ASP.
• NET Core. Migrate EF6 code-first to EF Core with multi-context patterns and per-tenant schema management. Refactor Autofac 3 to Microsoft.
• Extensions.
• DependencyInjection. Migrate ASP.
• NET Identity 2 / OWIN to ASP.
• NET Core Identity + OIDC / OAuth 2.0.

AWS re-platform

Design and execute the move from Azure to AWS. Replace Azure Blob with S3, Azure Service Bus / Queues with SQS/SNS/EventBridge, Azure Redis with ElastiCache, Azure WebJobs with Lambda / ECS + EventBridge Scheduler, Application Insights + log4net with CloudWatch / OpenTelemetry / Serilog. Move to ECS/Fargate or EKS on containerized .NET. Move database from Azure SQL to RDS or Aurora using AWS DMS.

Security & key management

Own PHI field-level encryption using AWS KMS. Move secrets to AWS Secrets Manager. Establish VPC design, IAM policies, least-privilege access appropriate to HIPAA-regulated SaaS.

CI/CD & IaC

Move builds from MSBuild / Visual Studio to dotnet CLI + automated pipelines. Establish infrastructure-as-code (Terraform or AWS CDK). Raise test coverage using xUnit / NUnit + Moq.

Team leadership

Manage two engineers directly — sprint planning, code review, mentorship. Coordinate architecture decisions with the Laravel Lead on shared services.

Compliance stewardship

Maintain and extend HIPAA technical safeguards through the migration. Add GDPR compliance layer for future EU rollout. Add i18n infrastructure for multi-language rollout.

Yêu cầu

• 8+ years of professional C# / .NET development
• Both modern .NET (.NET 6/7/8/9) AND legacy .NET Framework 4.x production experience
• Proven .NET Framework → .NET Core/8/9 migration experience at scale on a real production codebase
• Deep hands-on experience migrating ASP.
• NET MVC 5 / Web API 2 to ASP.
• NET Core
• Deep hands-on Entity Framework 6 → EF Core migration experience, including multi-context and code-first migration patterns
• Modern C# fluency — nullable reference types, async/await throughout, pattern matching, records, primary constructors
• Autofac → Microsoft.
• Extensions.
• DependencyInjection refactoring experience
• ASP.
• NET Core Identity + OIDC/OAuth 2.0 — migrated from ASP.
• NET Identity 2/OWIN in production
• HIPAA production implementation experience — field-level encryption, audit logging, access controls
• Multi-tenant SaaS architecture experience — ideally DB-per-tenant, with tenant resolution middleware, per-tenant schema management, rolling schema changes
• Hands-on AWS production experience: ECS/Fargate or EKS, RDS, VPC, IAM, Secrets Manager, KMS, S3, SQS/SNS/EventBridge, ElastiCache, CloudWatch
• Strong SQL Server production experience, including performance tuning and rolling schema changes
• Prior team lead experience — managed 2-4 engineers
• Excellent English communication, verbal and written
• Nice to Have
• Prior experience with a full Azure-to-AWS re-platforming — the perfect-fit signal
• AWS DMS experience for SQL Server migrations
• Docker/Kubernetes for containerized .NET
• Infrastructure-as-code experience (Terraform preferred, AWS CDK/CloudFormation acceptable)
• SonarQube or similar static analysis tooling
• Serilog + OpenTelemetry observability stack
• Prior work on healthcare, wellness, med spa, or medical practice management software
• SOC 2 audit preparation experience
• GDPR compliance implementation experience
• Front-end modernization experience (jQuery/Bootstrap → React)

Quyền lợi

Salary

• USD 4,000-5,600/month gross, paid monthly via Multiplier Technologies Vietnam (Employer of Record)
• 13th-month bonus (1 month of salary, customary in Vietnam, paid every December)
• Annual salary review with merit-based increases
• Full Vietnamese statutory benefits administered via EOR: social insurance, health insurance, unemployment insurance, occupational accident and disease insurance
• 12+ days annual paid leave per Vietnamese Labor Code, plus all Vietnamese public holidays, plus sick and personal leave per Vietnamese Labor Code
• Company-owned computer for your work
• Access to our team space at Dreamplex, District 1 or District 3, Ho Chi Minh City
• Company-provided VPN, MDM, security stack, and productivity software licenses
• Direct mentorship from the US-based founder
• Direct employment transition to Clearstone Software Vietnam Co., Ltd. planned for late 2026 / early 2027, with continuity of service preserved
• Working Arrangement
• Hybrid: 2-3 days per week at our HCMC team space (District 1 or 3), remainder home-based
• Core overlap hours: 9:00 AM - 1:00 PM ICT for standup and synchronous work
• Output-based culture — we value what you ship, not hours-in-chair
• Initial 60-day probation via EOR, then indefinite-term contract
• Application Process
• Your CV (PDF)
• Link to your GitHub profile or technical portfolio
• Short cover note (3 paragraphs max): why you're interested, a specific .NET Framework → .NET Core migration you've led (sequencing, what nearly derailed it, what you'd do differently), and your point of view on preserving multi-tenant isolation and PHI encryption through a coordinated migration
• Earliest start date and current salary expectation in USD/month
• Process timeline: ~4 weeks from application to offer given the specialist nature of the role.