Sr. Software Engineer, Platform Modernization

Innovation Associates, Inc.• US,

2d•$116,000 - $185,000

About The Position

The Sr. Software Engineer, Platform Modernization will incrementally modernize iA’s NEXiA pharmacy fulfillment software using a strangler fig approach. The role moves individual capabilities out of the legacy system into well-defined bounded contexts, routes traffic to new implementations, and provides a rollback path while preserving familiar workflows for pharmacists and operators. The work focuses on the boundary between legacy and modern systems: isolating legacy coupling, maintaining compatibility across customer versions, and modeling software around real pharmacy workflows. The engineer will work with pharmacists, operators, support staff, and cross-functional teams to validate domain models and align modernization priorities with customer impact. The role includes full-stack development with .NET Core / ASP.NET Core and modern front-end frameworks; systems design across module boundaries; testing domain behavior across old and new components; and contributions to CI/CD, containerized deployments, and observability. The engineer is expected to use AI-assisted development tools and help mentor teammates on domain-driven design, migration patterns, and systems thinking.

Requirements

At least 6 years of software development experience, including meaningful experience modernizing or migrating existing systems rather than working exclusively on greenfield projects.
Demonstrated ability to model software around business domains, such as through domain-driven design, bounded context identification, or equivalent domain modeling practices.
Experience working at the boundary between legacy and modern systems, including anti-corruption layers, facade patterns, incremental migration, or feature flags for gradual cutover.
Strong proficiency in a statically typed object-oriented language; C#/.NET is strongly preferred, with Java or a similar language accepted if willing to ramp up.
Experience with modern front-end frameworks such as Angular, React, Blazor, or equivalent.
Understanding of on-premises deployment constraints, including customer-specific configurations, upgrade compatibility, and long-lived versions.
Ability to reason about how changes propagate across module and service boundaries.
Authorization to work for any U.S. employer; the employer will not sponsor work visas.

Nice To Haves

Experience in healthcare, pharmacy automation, or a regulated environment.
Experience with event-driven architectures and domain event patterns.
Familiarity with Azure cloud services and hybrid cloud/on-premises models.
Active use of AI-assisted development tools with concrete examples of productivity impact; hands-on experience with Claude Code, Opus, or Sonnet is a significant plus.
Experience with container orchestration such as Kubernetes or OpenShift in on-premises environments.

Responsibilities

Decompose legacy NEXiA capabilities into bounded contexts based on pharmacy workflows such as fulfillment, dispensing, inventory, and patient safety.
Design and implement anti-corruption layers and facade patterns that isolate new modules from legacy coupling.
Execute incremental strangler fig migrations, routing traffic from legacy paths to new implementations with rollback capability.
Maintain a seamless end-user experience while underlying systems are modernized.
Collaborate with pharmacists, operators, support staff, and other domain experts to validate domain models against real-world workflows.
Reason about system behavior across module boundaries, including failure modes, data consistency, and latency.
Design for on-premises customer-deployed environments, including upgrade paths, backward compatibility, and long-lived versions.
Own technical design within bounded contexts, propose decomposition strategies, and defend them in design reviews.
Build full-stack applications using .NET Core / ASP.NET Core and modern front-end frameworks.
Write integration tests that validate domain behavior across old and new system boundaries.
Apply domain-driven design patterns, including aggregates, domain events, and context mapping, where they provide clarity.
Contribute to CI/CD pipelines, containerized deployments, and observability, especially at legacy-modern integration points.
Adopt, evaluate, and integrate AI-assisted development tools into daily workflows for activities such as understanding legacy code, generating migration scaffolding, and validating domain models.
Work across engineering, product, QA, and customer-facing teams to align modernization priorities with customer impact.
Participate in design discussions, challenge assumptions, surface risks, and propose alternatives.
Mentor team members on domain-driven design, migration patterns, and systems thinking.