.Net Sr. Software Engineer

Randstad Digital Americas is seeking a Senior Technologist / Principal Architect to provide hands-on technical leadership as a mature healthcare analytics product evolves into a scalable platform. The role focuses on modernizing a legacy Oracle/PL/SQL based drug diversion detection system and defining a modernization strategy for improved scalability and flexibility.

Responsibilities:

• Lead the incremental modernization of a large, Oracle centric system by extracting business logic and computationally intensive processing from PL/SQL into application and platform level components, implemented using modern languages and frameworks (e.g., .NET/C#)
• Design architectures that treat the database primarily as durable storage and efficient data access, while executing complex rules, detection logic, enrichment, and aggregation outside the database
• Define processing strategies that may include in process, distributed, stateful, or partitioned execution models, selected based on workload characteristics (batch, near real time, scale, and data volume)
• Define and evolve the target architecture and technology stack, prioritizing open source ecosystems and vendor neutral patterns
• Design solutions capable of processing hundreds of millions of records across tenants, with attention to throughput, scalability, data isolation, and cost efficiency
• Establish migration strategies that enable parallel execution, parity validation, and safe incremental cutover as logic is moved out of the database
• Provide technical leadership as the product expands to integrate:
• New clinical and operational data feeds
• Modular services and APIs
• Authentication and authorization capabilities
• Internal and external integrations
• Shape architectural standards for data ingestion, batch and near real time processing, service boundaries, and API design
• Ensure systems are scalable, observable, reliable, and auditable, appropriate for regulated healthcare environments
• Remain hands on, contributing to design and code while mentoring engineers and influencing technical direction across teams

Requirements:

• 5-7 years of experience
• Health industry experience is a must-have
• Significant experience modernizing legacy, data intensive systems operating at scale
• Demonstrated success decoupling business logic and processing from relational databases and re implementing it in application or platform level execution environments
• Strong proficiency in C#/.NET or similar modern, multi paradigm languages, with emphasis on modularity and testability
• Deep understanding of SQL and relational databases, including performance tuning and making informed decisions about what belongs in the database versus outside it
• Experience designing systems that handle large volume, multi tenant data using batch, micro batch, or near real time processing approaches
• Proven ability to define and execute incremental modernization strategies without disrupting production systems
• Experience guiding systems as they evolve from product to platform, supporting multiple integrations and consumers
• Strong communication skills and ability to influence technical and non technical stakeholders
• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
• Advanced degree is a plus but not required