Senior Mobile & Cloud Full-Stack Engineer

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.

Job Category: App Sync, AWS Cognito, Graph

QL, MSAL, REST, Spring Boot.

Job Type: Hybrid.

Job Location: District of Columbia, Washington.

Compensation: Depends on Experience.

W2: W2-Contract Only; applications on a C2C basis will not be considered for this role.

C2C: Contract - W2.

Randstad, in partnership with a major client, is seeking a Senior Principal Mobile & Cloud Full-Stack Engineer to drive the design and development of next-generation, mobile-first, cloud-native applications for operational and passenger systems. This high-impact, hybrid role based in the DC area requires expertise across Native iOS (Swift/Swift

UI) and Android (Kotlin/Jetpack Compose), combined with robust skills in building Back-End for Front-End (BFF) microservices using Java/Spring Boot or NodeJS running on AWS ECS Fargate and Lambda. Operating within a SAFe Agile framework, you will define architecture, manage containerized services, implement CI/CD with Bitrise and AWS Code Pipeline, and ensure secure, scalable data integration using Kafka/Kinesis, Aurora Postgre

SQL, and Dynamo

DB. Candidates must be prepared for a hybrid schedule, including travel to DC for key SAFe ceremonies and maintaining camera-on during virtual team collaboration.

• Native Mobile Development:
  Design and develop high-performance native applications for iOS (Swift/Swift
  
  UI) and Android (Kotlin/Jetpack Compose), including extensions for Apple Watch and Wear OS.
• Security & Authentication:
  Implement integration with enterprise identity providers, including AWS Cognito, MSAL (Azure AD), and other SSO solutions.
• Edge Computing & Offline-First:
  Build features leveraging peer-to-peer APIs, indoor way finding (Core Location/ARKit), and on-device intelligence (BNNS/NNAPI), while optimizing for low-bandwidth and offline environments.
• BFF Architecture:
  Architect and develop mobile-optimized BFF microservices using Spring Boot (Java 21+) or NodeJS (22+) deployed on AWS ECS Fargate.
• Data Aggregation:
  Shape and aggregate data from multiple enterprise sources (Mule Soft, Oracle, SQL Server) into mobile-specific APIs using Graph
  
  QL, REST, or App Sync patterns.
• Cloud Microservices:
  Develop and maintain event-driven and real-time workflows using AWS Lambda (NodeJS/Java), managing hybrid persistence with Aurora Postgre
  
  SQL, Dynamo
  
  DB, and Redis.
• Enterprise Integration:
  Implement routing, transformation, and integration logic using Apache Camel with messaging services like Kafka, Kinesis, SQS, and SNS.
• Dev Ops & CI/CD:
  Manage, maintain, and automate build/deployment pipelines using AWS Code Build/Code Pipeline and Bitrise for native apps, defining infrastructure using Cloud Formation/CDK or Terraform.
• Agile & SAFe
  
  Collaboration:
  
  Actively participate in all SAFe ceremonies (PI Planning, retrospectives, etc.), embrace self-management for iteration commitments, and collaborate across Product, Architecture, and Middleware teams.
• Monitoring & Observability:
  Design and implement secure, observable, and scalable cloud architectures using AWS Cloud Watch/Cloud Trail/X-Ray, with preference for experience in Dynatrace.

• Experience Level: 7+ years in full-stack engineering, with a strong focus on both native mobile and cloud backend development.
• Languages & Frameworks:
  Expert-level proficiency in Swift, Kotlin, Type Script, Java 21+, and SQL.
  
  Experience with Swift
  
  UI, Jetpack Compose, Spring Boot, and Express
  
  JS/NestJS.
• Cloud Expertise (AWS Focus):
  Deep hands-on experience with core AWS services, including ECS Fargate, Lambda, API Gateway, Cognito, SQS/SNS, Kinesis, Aurora Postgre
  
  SQL, and Dynamo
  
  DB.
• Integration & Messaging:
  Practical experience with Apache Camel, and stream processing/messaging via Kafka or AWS Kinesis.
• Dev Ops & Infrastructure-as-Code (IaC):
  Proven ability to implement CI/CD for native apps (e.g., Bitrise, AWS Code Pipeline) and define cloud infrastructure using Cloud Formation/CDK or Terraform.
• Agile Proficiency:
  Demonstrable experience working in a SAFe or similar scaled Agile environment, including capacity planning and self-organization.
• Preferred Experience:
  
  Familiarity with Intune MDM, enterprise mobility management, and low-latency, offline-first design patterns.
• Soft Skills:
  
  Strategic, mobile-first thinker; excellent communicator; detail-oriented; and highly collaborative within large, multi-disciplinary teams.
• Work Arrangement:
  Must be willing to work in a hybrid capacity and travel to the DC area on an as-needed basis, particularly for critical SAFe ceremonies.

Competitive compensation, flexible remote hybrid work, opportunities to work on cutting-edge mobile and cloud technologies, and a collaborative SAFe team environment.