Senior Full Stack Engineer – .NET, React, Cloud

Gainwell Technologies

. Design, build, test, and operate secure, scalable software for Medicaid DDI programs and modernized Provider Plus capabilities .

Posted 9/30/2026full-timeRemote • United StatesSenior💰 $76,100 - $108,700 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing secure, scalable software solutions for Medicaid DDI programs, utilizing cloud-native engineering and modern development practices. Proficient in building microservices and multi-tenant applications with a strong focus on security, maintainability, and integration.

Highest-signal resume keywords

C#/.NET DevelopmentJavaScript/TypeScript DevelopmentReact DevelopmentPostgreSQL SolutionsCloud-Native Services

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

C#.NETJavaScriptTypeScriptReactMicroservicesREST APIsTerraformCI/CDSOLID Principles

Soft Skills

FlexibilityCollaboration

Tools & Technologies

AWSLambdaAPI GatewayS3SQSGlueSparkMSKKafkaEKS

Industry Keywords

MedicaidDDI ProgramsEnterprise ApplicationsIntegrationsCloud-Native ServicesEvent-Driven DesignSecure Coding

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsJavaScriptKafkaMicroservicesPostgresReactSOAPSparkTerraformTypeScript.NET

About the role

Key responsibilities & impact

Design, build, test, and operate secure, scalable software for Medicaid DDI programs and modernized Provider Plus capabilities
Use cloud-native engineering and approved AI coding tools while retaining developer ownership for design, security, correctness, testing, and maintainability
Develop React/TypeScript micro-frontends and .NET 10/C# microservices, serverless services, and contract-first REST APIs
Build multi-tenant capabilities using tenant isolation, configuration-driven behavior, feature flags, and coordinated API, UX, and schema versioning
Develop PostgreSQL solutions and AWS workloads using Lambda, API Gateway, S3, SQS, Glue/Spark, MSK/Kafka, and EKS patterns
Implement REST, event, queue, batch, and managed file-transfer integrations, including SOAP/WCF adapters
Create Terraform and CI/CD assets for automated build, testing, security scanning, deployment, rollback, and environment promotion
Implement automated tests, observability, secure logging, code review, vulnerability remediation, and production-readiness controls

Requirements

What you’ll need

6+ years of professional software engineering experience
Strong hands-on C#/.NET development
Strong hands-on JavaScript/TypeScript development
React and modern API experience preferred
Experience delivering enterprise applications, integrations, or cloud-native services
Medicaid/MMIS/MES experience preferred
Strong knowledge of SOLID, distributed systems, microservices, event-driven design, and secure coding
Willingness to work a flexible schedule to accommodate business needs and travel
Video cameras must be used during all interviews and the initial week of orientation

Benefits

Comp & perks

Flexible work arrangements
Learning and career development opportunities
Technical credentials and certifications
Generous, flexible vacation policy
Educational assistance
Leadership and technical development academies
Opportunities to travel through work (0–10%)
401(k) employer match
Comprehensive health benefits